test(tess): cover streamed private key redaction

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

.gitignore

@@ -9,3 +9,16 @@ coverage
 *.tsbuildinfo
 .pnpm-store
 docs/reports/
+
+# Step-CA dev password — real file is gitignored; commit only the .example
+infra/step-ca/dev-password
+
+# Scratch dirs created by the framework git-wrapper shell test harnesses
+.mosaic-test-work/
+
+# Transient config files vite/vitest/esbuild write next to a *.config.ts while
+# loading it, then unlink. They are untracked but were not ignored, so turbo's
+# package traversal hashed them and intermittently failed CI with "Package
+# traversal error: ... .timestamp-*.mjs: No such file or directory" when the
+# file vanished mid-scan. Ignoring them removes the race.
+*.timestamp-*.mjs

.npmrc

@@ -1 +1,5 @@
 @mosaicstack:registry=https://git.mosaicstack.dev/api/packages/mosaicstack/npm/
+# Pin the pnpm store to the same path the ci-base image warms (Dockerfile.ci),
+# so the pipeline `pnpm install --prefer-offline` consumes the baked store
+# instead of repopulating a fresh one.
+store-dir=/root/.local/share/pnpm/store

.prettierignore

@@ -5,3 +5,5 @@ pnpm-lock.yaml
 **/drizzle
 **/.next
 .claude/
+docs/tess/TASKS.md
+docs/scratchpads/

.woodpecker/ci-image.yml

@@ -0,0 +1,40 @@
+# Build & push the pre-baked CI base image (Dockerfile.ci) to the Gitea
+# registry CI already publishes to. Reuses the exact kaniko + auth pattern
+# from publish.yml (REGISTRY_USER/REGISTRY_PASS from_secret, /kaniko/.docker
+# config.json). Other pipelines (ci.yml, publish.yml) pull `ci-base:latest`
+# for their install step.
+#
+# Rebuild ONLY when the dependency set or the image recipe changes — a normal
+# code push must not trigger a 25-min image build. `path` applies to push/PR
+# events; `event: tag` (releases) rebuilds unconditionally so a tagged release
+# always ships a fresh base.
+when:
+  - event: tag
+  - event: [push, manual]
+    branch: main
+    path:
+      include:
+        - 'pnpm-lock.yaml'
+        - 'Dockerfile.ci'
+
+steps:
+  build-ci-base:
+    image: gcr.io/kaniko-project/executor:debug
+    environment:
+      REGISTRY_USER:
+        from_secret: gitea_username
+      REGISTRY_PASS:
+        from_secret: gitea_password
+      CI_COMMIT_BRANCH: ${CI_COMMIT_BRANCH}
+      CI_COMMIT_TAG: ${CI_COMMIT_TAG}
+      CI_COMMIT_SHA: ${CI_COMMIT_SHA}
+    commands:
+      - mkdir -p /kaniko/.docker
+      - echo "{\"auths\":{\"git.mosaicstack.dev\":{\"username\":\"$REGISTRY_USER\",\"password\":\"$REGISTRY_PASS\"}}}" > /kaniko/.docker/config.json
+      - |
+        # Lockfile-hash tag: an immutable identity for the exact dep set baked
+        # into this image. `:latest` is the mutable pointer pipelines consume.
+        LOCK_HASH=$(sha256sum pnpm-lock.yaml | cut -c1-12)
+        DESTINATIONS="--destination git.mosaicstack.dev/mosaicstack/stack/ci-base:latest"
+        DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/ci-base:lock-$LOCK_HASH"
+        /kaniko/executor --context . --dockerfile Dockerfile.ci $DESTINATIONS

.woodpecker/ci.yml

@@ -1,9 +1,20 @@
+# &node_image is the pre-baked CI base built by .woodpecker/ci-image.yml:
+# node:24-alpine + python3/make/g++/postgresql-client + pnpm + a warm pnpm
+# store. The install step resolves from the baked store (--prefer-offline)
+# instead of paying a ~731s cold fetch + native compile every run.
 variables:
-  - &node_image 'node:22-alpine'
+  - &node_image 'git.mosaicstack.dev/mosaicstack/stack/ci-base:latest'
   - &enable_pnpm 'corepack enable'
 
 when:
-  - event: [push, pull_request, manual]
+  # PR + manual CI run on any branch — the pull_request pipeline is the merge gate.
+  # push CI is restricted to protected branches (main) so a feature-branch push no
+  # longer fires a redundant SECOND pipeline alongside its PR pipeline. This ~halves
+  # CI load on the storage-constrained runner with zero loss of gating (branch
+  # protection requires no push/ci status context; main still gets full push CI).
+  - event: [pull_request, manual]
+  - event: push
+    branch: main
 
 # Turbo remote cache (turbo.mosaicstack.dev) is configured via Woodpecker
 # repository-level environment variables (TURBO_API, TURBO_TEAM, TURBO_TOKEN).
@@ -15,8 +26,21 @@ steps:
     image: *node_image
     commands:
       - corepack enable
-      - apk add --no-cache python3 make g++
+      # python3/make/g++ are baked into ci-base; --prefer-offline resolves from
-      - pnpm install --frozen-lockfile
+      # the baked pnpm store.
+      - pnpm install --frozen-lockfile --prefer-offline
+
+  # Blocking gate: public framework package must contain no operator-specific
+  # personal data or private $HOME defaults. Runs early (no node_modules needed).
+  sanitization:
+    image: *node_image
+    commands:
+      - apk add --no-cache bash
+      - bash packages/mosaic/framework/tools/quality/scripts/verify-sanitized.sh
+      # Resident line-count ceiling over framework-owned resident files
+      # (Constitution + dispatcher + each RUNTIME.md slice). See DESIGN §7 / R9.
+      - bash packages/mosaic/framework/tools/quality/scripts/check-resident-budget.sh --self-test
+      - bash packages/mosaic/framework/tools/quality/scripts/check-resident-budget.sh
 
   typecheck:
     image: *node_image
@@ -25,6 +49,7 @@ steps:
       - pnpm typecheck
     depends_on:
       - install
+      - sanitization
 
   # lint, format, and test are independent — run in parallel after typecheck
   lint:
@@ -46,18 +71,27 @@ steps:
   test:
     image: *node_image
     environment:
-      DATABASE_URL: postgresql://mosaic:mosaic@postgres:5432/mosaic
+      # Avoid the namespace-level Woodpecker DB service named "postgres".
+      # The Kubernetes backend exposes service containers by step name.
+      DATABASE_URL: postgresql://mosaic:mosaic@ci-postgres:5432/mosaic
     commands:
       - *enable_pnpm
-      # Install postgresql-client for pg_isready
+      # postgresql-client (pg_isready) is baked into ci-base.
-      - apk add --no-cache postgresql-client
+      # Wait up to 60s for CI postgres to be ready; fail fast if it never comes up.
-      # Wait up to 30s for postgres to be ready
       - |
-        for i in $(seq 1 30); do
+        ready=0
-          pg_isready -h postgres -p 5432 -U mosaic && break
+        for i in $(seq 1 60); do
-          echo "Waiting for postgres ($i/30)..."
+          if pg_isready -h ci-postgres -p 5432 -U mosaic; then
+            ready=1
+            break
+          fi
+          echo "Waiting for ci-postgres ($i/60)..."
           sleep 1
         done
+        if [ "$ready" -ne 1 ]; then
+          echo "ci-postgres did not become ready" >&2
+          exit 1
+        fi
       # Run migrations (DATABASE_URL is set in environment above)
       - pnpm --filter @mosaicstack/db run db:migrate
       # Run all tests
@@ -66,7 +100,7 @@ steps:
       - typecheck
 
 services:
-  postgres:
+  ci-postgres:
     image: pgvector/pgvector:pg17
     environment:
       POSTGRES_USER: mosaic

.woodpecker/publish.yml

@@ -2,8 +2,27 @@
 # Runs only on main branch push/tag
 
 variables:
-  - &node_image 'node:22-alpine'
+  # Pre-baked CI base (see .woodpecker/ci-image.yml): node:24-alpine +
+  # toolchain + warm pnpm store. Kills the second cold install publish pays.
+  - &node_image 'git.mosaicstack.dev/mosaicstack/stack/ci-base:latest'
   - &enable_pnpm 'corepack enable'
+  # Heavy kaniko image builds (~25 min) — gate them so a merge that only touches
+  # the npm-only CLI (@mosaicstack/mosaic) or docs does NOT rebuild the platform
+  # images (gateway/appservice/web do not depend on @mosaicstack/mosaic). Releases
+  # (tags) always build everything. Exclude-list keeps the default SAFE: any
+  # non-excluded change still builds, so no transitive dep can silently go stale.
+  # (Woodpecker: `when` entries are OR'd; `path` applies to push/PR only — hence
+  # the separate `event: tag` entry.)
+  - &image_build_when
+    - event: tag
+    - event: [push, manual]
+      branch: main
+      path:
+        exclude:
+          - 'packages/mosaic/**'
+          - 'docs/**'
+          - '**/*.md'
+          - '.woodpecker/**'
 
 when:
   - branch: [main]
@@ -14,7 +33,8 @@ steps:
     image: *node_image
     commands:
       - corepack enable
-      - pnpm install --frozen-lockfile
+      # Resolve from the baked pnpm store instead of a cold network fetch.
+      - pnpm install --frozen-lockfile --prefer-offline
 
   build:
     image: *node_image
@@ -26,6 +46,15 @@ steps:
 
   publish-npm:
     image: *node_image
+    # Publish only when a publishable package changed (or on a release tag); a
+    # pure-docs merge runs no publish. Cheap step, but gated for cleanliness.
+    when:
+      - event: tag
+      - event: [push, manual]
+        branch: main
+        path:
+          include:
+            - 'packages/**'
     environment:
       NPM_TOKEN:
         from_secret: gitea_token
@@ -91,6 +120,7 @@ steps:
 
   build-gateway:
     image: gcr.io/kaniko-project/executor:debug
+    when: *image_build_when
     environment:
       REGISTRY_USER:
         from_secret: gitea_username
@@ -103,19 +133,20 @@ steps:
       - mkdir -p /kaniko/.docker
       - echo "{\"auths\":{\"git.mosaicstack.dev\":{\"username\":\"$REGISTRY_USER\",\"password\":\"$REGISTRY_PASS\"}}}" > /kaniko/.docker/config.json
       - |
-        DESTINATIONS="--destination git.mosaicstack.dev/mosaicstack/mosaic-stack/gateway:sha-${CI_COMMIT_SHA:0:7}"
+        DESTINATIONS="--destination git.mosaicstack.dev/mosaicstack/stack/gateway:sha-${CI_COMMIT_SHA:0:7}"
         if [ "$CI_COMMIT_BRANCH" = "main" ]; then
-          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/mosaic-stack/gateway:latest"
+          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/gateway:latest"
         fi
         if [ -n "$CI_COMMIT_TAG" ]; then
-          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/mosaic-stack/gateway:$CI_COMMIT_TAG"
+          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/gateway:$CI_COMMIT_TAG"
         fi
         /kaniko/executor --context . --dockerfile docker/gateway.Dockerfile $DESTINATIONS
     depends_on:
       - build
 
-  build-web:
+  build-appservice:
     image: gcr.io/kaniko-project/executor:debug
+    when: *image_build_when
     environment:
       REGISTRY_USER:
         from_secret: gitea_username
@@ -128,12 +159,38 @@ steps:
       - mkdir -p /kaniko/.docker
       - echo "{\"auths\":{\"git.mosaicstack.dev\":{\"username\":\"$REGISTRY_USER\",\"password\":\"$REGISTRY_PASS\"}}}" > /kaniko/.docker/config.json
       - |
-        DESTINATIONS="--destination git.mosaicstack.dev/mosaicstack/mosaic-stack/web:sha-${CI_COMMIT_SHA:0:7}"
+        DESTINATIONS="--destination git.mosaicstack.dev/mosaicstack/stack/appservice:sha-${CI_COMMIT_SHA:0:7}"
         if [ "$CI_COMMIT_BRANCH" = "main" ]; then
-          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/mosaic-stack/web:latest"
+          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/appservice:latest"
         fi
         if [ -n "$CI_COMMIT_TAG" ]; then
-          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/mosaic-stack/web:$CI_COMMIT_TAG"
+          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/appservice:$CI_COMMIT_TAG"
+        fi
+        /kaniko/executor --context . --dockerfile docker/appservice.Dockerfile $DESTINATIONS
+    depends_on:
+      - build
+
+  build-web:
+    image: gcr.io/kaniko-project/executor:debug
+    when: *image_build_when
+    environment:
+      REGISTRY_USER:
+        from_secret: gitea_username
+      REGISTRY_PASS:
+        from_secret: gitea_password
+      CI_COMMIT_BRANCH: ${CI_COMMIT_BRANCH}
+      CI_COMMIT_TAG: ${CI_COMMIT_TAG}
+      CI_COMMIT_SHA: ${CI_COMMIT_SHA}
+    commands:
+      - mkdir -p /kaniko/.docker
+      - echo "{\"auths\":{\"git.mosaicstack.dev\":{\"username\":\"$REGISTRY_USER\",\"password\":\"$REGISTRY_PASS\"}}}" > /kaniko/.docker/config.json
+      - |
+        DESTINATIONS="--destination git.mosaicstack.dev/mosaicstack/stack/web:sha-${CI_COMMIT_SHA:0:7}"
+        if [ "$CI_COMMIT_BRANCH" = "main" ]; then
+          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/web:latest"
+        fi
+        if [ -n "$CI_COMMIT_TAG" ]; then
+          DESTINATIONS="$DESTINATIONS --destination git.mosaicstack.dev/mosaicstack/stack/web:$CI_COMMIT_TAG"
         fi
         /kaniko/executor --context . --dockerfile docker/web.Dockerfile $DESTINATIONS
     depends_on:

AGENTS.md

@@ -58,14 +58,14 @@ pnpm typecheck && pnpm lint && pnpm format:check  # Quality gates
 
 The `agent` column specifies the required model for each task. **This is set at task creation by the orchestrator and must not be changed by workers.**
 
-| Value    | When to use                                                 | Budget                     |
+| Value     | When to use                                                 | Budget                     |
-| -------- | ----------------------------------------------------------- | -------------------------- |
+| --------- | ----------------------------------------------------------- | -------------------------- |
-| `codex`  | All coding tasks (default for implementation)               | OpenAI credits — preferred |
+| `codex`   | All coding tasks (default for implementation)               | OpenAI credits — preferred |
-| `glm-5`  | Cost-sensitive coding where Codex is unavailable            | Z.ai credits               |
+| `glm-5.1` | Cost-sensitive coding where Codex is unavailable            | Z.ai credits               |
-| `haiku`  | Review gates, verify tasks, status checks, docs-only        | Cheapest Claude tier       |
+| `haiku`   | Review gates, verify tasks, status checks, docs-only        | Cheapest Claude tier       |
-| `sonnet` | Complex planning, multi-file reasoning, architecture review | Claude quota               |
+| `sonnet`  | Complex planning, multi-file reasoning, architecture review | Claude quota               |
-| `opus`   | Major cross-cutting architecture decisions ONLY             | Most expensive — minimize  |
+| `opus`    | Major cross-cutting architecture decisions ONLY             | Most expensive — minimize  |
-| `—`      | No preference / auto-select cheapest capable                | Pipeline decides           |
+| `—`       | No preference / auto-select cheapest capable                | Pipeline decides           |
 
 Pipeline crons read this column and spawn accordingly. Workers never modify `docs/TASKS.md` — only the orchestrator writes it.
 

Dockerfile.ci

@@ -0,0 +1,45 @@
+# Pre-baked CI base image for Woodpecker pipelines.
+#
+# Purpose: eliminate the cold `pnpm install` that dominates every pipeline
+# (~731s median). This image ships the native toolchain (no per-run `apk add`)
+# AND a warm, content-addressable pnpm store with the dependency-tree tarballs
+# already fetched at build time. `pnpm fetch` only populates the store from the
+# lockfile — it does NOT run the native node-gyp builds (better-sqlite3,
+# node-pty, sqlite3, canvas, sharp); those still compile at `pnpm install`,
+# which is exactly why the musl toolchain stays baked into this image. A
+# pipeline `pnpm install --frozen-lockfile --prefer-offline` then resolves
+# tarballs from local hard-links (no network) and compiles natives against the
+# already-present toolchain, in tens of seconds instead of ~731s.
+#
+# Rebuilt only when `pnpm-lock.yaml` or this Dockerfile change
+# (see .woodpecker/ci-image.yml).
+#
+# Node version is pinned to 24 (Active LTS). This is the follow-up bump from
+# node:22 — sequenced AFTER the CI cache work landed so the runtime change
+# carries zero cache variables. node:26 stays held until it reaches LTS
+# (Oct 2026); the Current line risks native-module (node-gyp) breakage on a
+# runner that compiles better-sqlite3 / canvas / sharp / node-pty from source.
+FROM node:24-alpine
+
+# Native toolchain required to compile node-gyp deps on musl, plus the
+# postgresql-client used by the test step's pg_isready readiness probe. `bash`
+# is baked here too — the sanitization step in ci.yml otherwise does a per-run
+# `apk add bash`.
+RUN apk add --no-cache python3 make g++ postgresql-client bash
+
+# Pin pnpm to the repo's packageManager version via corepack.
+RUN corepack enable && corepack prepare pnpm@10.6.2 --activate
+
+WORKDIR /app
+
+# Pin the store location so the pipeline can point `store-dir` at the same path.
+ENV PNPM_HOME=/root/.local/share/pnpm
+RUN pnpm config set store-dir /root/.local/share/pnpm/store
+
+# Warm the store. `pnpm fetch` populates the content-addressable store with the
+# dependency tarballs directly from the lockfile (no package.json / workspace
+# needed), so a baked store stays valid until the lockfile changes. Note:
+# `fetch` does NOT compile native modules — that happens later at `pnpm install`
+# in the pipeline, against the toolchain baked above.
+COPY pnpm-lock.yaml ./
+RUN pnpm fetch --frozen-lockfile

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Mosaic Stack
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -7,7 +7,13 @@ Mosaic gives you a unified launcher for Claude Code, Codex, OpenCode, and Pi —
 ## Quick Install
 
 ```bash
-bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/mosaic-stack/raw/branch/main/tools/install.sh)
+curl -fsSL https://mosaicstack.dev/install.sh | bash
+```
+
+Or use the direct URL:
+
+```bash
+bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh)
 ```
 
 The installer auto-launches the setup wizard, which walks you through gateway install and verification. Flags for non-interactive use:
@@ -52,6 +58,8 @@ mosaic yolo pi               # Pi in yolo mode
 
 The launcher verifies your config, checks for `SOUL.md`, injects your `AGENTS.md` standards into the runtime, and forwards all arguments.
 
+Pi launches default to a token-lean skill posture: `mosaic pi` passes `--no-skills` so Pi does not preload every global skill description into the system prompt. Use `MOSAIC_PI_SKILL_MODE=all mosaic pi` for the legacy all-skills catalog, or `MOSAIC_PI_SKILL_MODE=discover mosaic pi` to let Pi use its native settings/project skill discovery.
+
 ### TUI & Gateway
 
 ```bash
@@ -74,6 +82,8 @@ If you already have a gateway account but no token, use `mosaic gateway config r
 
 ### Configuration
 
+Mosaic supports three storage tiers: `local` (PGlite, single-host), `standalone` (PostgreSQL, single-host), and `federated` (PostgreSQL + pgvector + Valkey, multi-host). See [Federated Tier Setup](docs/federation/SETUP.md) for multi-user and production deployments, or [Migrating to Federated](docs/guides/migrate-tier.md) to upgrade from existing tiers.
+
 ```bash
 mosaic config show           # Print full config as JSON
 mosaic config get <key>      # Read a specific key
@@ -179,8 +189,8 @@ Consent state is persisted in config. Remote upload is a no-op until you run `mo
 ### Setup
 
 ```bash
-git clone git@git.mosaicstack.dev:mosaicstack/mosaic-stack.git
+git clone git@git.mosaicstack.dev:mosaicstack/stack.git
-cd mosaic-stack
+cd stack
 
 # Start infrastructure (Postgres, Valkey, Jaeger)
 docker compose up -d
@@ -229,7 +239,7 @@ npm packages are published to the Gitea package registry on main merges.
 ## Architecture
 
 ```
-mosaic-stack/
+stack/
 ├── apps/
 │   ├── gateway/             NestJS API + WebSocket hub (Fastify, Socket.IO, OTEL)
 │   └── web/                 Next.js dashboard (React 19, Tailwind)
@@ -302,7 +312,13 @@ Each stage has a dispatch mode (`exec` for research/review, `yolo` for coding),
 Run the installer again — it handles upgrades automatically:
 
 ```bash
-bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/mosaic-stack/raw/branch/main/tools/install.sh)
+curl -fsSL https://mosaicstack.dev/install.sh | bash
+```
+
+Or use the direct URL:
+
+```bash
+bash <(curl -fsSL https://git.mosaicstack.dev/mosaicstack/stack/raw/branch/main/tools/install.sh)
 ```
 
 Or use the CLI:

apps/appservice/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "@mosaicstack/mosaic-as",
+  "version": "0.0.1",
+  "type": "module",
+  "private": true,
+  "repository": {
+    "type": "git",
+    "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",
+    "directory": "apps/appservice"
+  },
+  "main": "dist/main.js",
+  "bin": {
+    "mosaic-as": "dist/main.js",
+    "mosaic-as-registration": "dist/registration-main.js"
+  },
+  "scripts": {
+    "build": "tsc",
+    "lint": "eslint src",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run --passWithNoTests",
+    "dev": "tsx watch src/main.ts"
+  },
+  "dependencies": {
+    "@mosaicstack/appservice": "workspace:*"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "tsx": "^4.19.0",
+    "typescript": "^5.8.0",
+    "vitest": "^2.0.0"
+  },
+  "files": [
+    "dist"
+  ]
+}

apps/appservice/src/__tests__/server.test.ts

@@ -0,0 +1,388 @@
+import { describe, expect, it, vi } from 'vitest';
+
+import { AppserviceDaemon } from '../server.js';
+import type { DaemonConfig, DaemonRequest } from '../server.js';
+
+const AGENTS_TYPE = 'org.uscllc.mosaic_as.agents';
+
+const cfg: DaemonConfig = {
+  homeserverUrl: 'https://hs.example',
+  domain: 'hs.example',
+  asToken: 'as-secret',
+  hsToken: 'hs-secret',
+  bridgeTokens: ['bridge-secret'],
+};
+
+const jsonResponse = (status: number, body: unknown): Response =>
+  new Response(JSON.stringify(body), { status, headers: { 'Content-Type': 'application/json' } });
+
+const request = (overrides: Partial<DaemonRequest>): DaemonRequest => ({
+  method: 'GET',
+  path: '/',
+  searchParams: new URLSearchParams(),
+  body: undefined,
+  ...overrides,
+});
+
+const makeDaemon = () => {
+  const fetchMock = vi.fn(async (_input: URL | string) => jsonResponse(200, { event_id: '$sent' }));
+  const daemon = new AppserviceDaemon(cfg, fetchMock as unknown as typeof fetch, () => {});
+  return { daemon, fetchMock };
+};
+
+describe('AppserviceDaemon routing', () => {
+  it('serves health unauthenticated', async () => {
+    const { daemon } = makeDaemon();
+    expect((await daemon.handle(request({ path: '/health' }))).status).toBe(200);
+  });
+
+  it('404s unknown paths', async () => {
+    const { daemon } = makeDaemon();
+    expect((await daemon.handle(request({ path: '/nope' }))).status).toBe(404);
+  });
+
+  it('transactions require the hs_token', async () => {
+    const { daemon } = makeDaemon();
+    const bad = await daemon.handle(
+      request({
+        method: 'PUT',
+        path: '/_matrix/app/v1/transactions/t1',
+        authorizationHeader: 'Bearer wrong',
+        body: { events: [] },
+      }),
+    );
+    expect(bad.status).toBe(403);
+    const ok = await daemon.handle(
+      request({
+        method: 'PUT',
+        path: '/_matrix/app/v1/transactions/t1',
+        authorizationHeader: 'Bearer hs-secret',
+        body: { events: [{ type: 'm.room.message', event_id: '$e' }] },
+      }),
+    );
+    expect(ok.status).toBe(200);
+  });
+
+  it('bridge requires a bridge token (hs/as tokens do not work)', async () => {
+    const { daemon } = makeDaemon();
+    for (const token of [undefined, 'Bearer hs-secret', 'Bearer as-secret', 'Bearer nope']) {
+      const res = await daemon.handle(
+        request({
+          method: 'POST',
+          path: '/bridge/v1/messages',
+          authorizationHeader: token,
+          body: {},
+        }),
+      );
+      expect(res.status).toBe(403);
+    }
+  });
+
+  it('bridge message sends as the agent and returns the event id', async () => {
+    const { daemon, fetchMock } = makeDaemon();
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/messages',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { room_id: '!r:hs.example', agent: 'pi0-web1', body: 'hi', thread_root: '$req' },
+      }),
+    );
+    expect(res.status).toBe(200);
+    expect(res.body.event_id).toBe('$sent');
+    const sendCall = fetchMock.mock.calls
+      .map((c) => new URL(String(c[0])))
+      .find((u) => u.pathname.includes('/send/m.room.message/'));
+    expect(sendCall).toBeDefined();
+    expect(sendCall!.searchParams.get('user_id')).toBe('@agent-pi0-web1:hs.example');
+  });
+
+  it('bridge rejects invalid payloads with 400', async () => {
+    const { daemon } = makeDaemon();
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/messages',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { room_id: 'bad', agent: 'pi0', body: 'x' },
+      }),
+    );
+    expect(res.status).toBe(400);
+  });
+
+  it('bridge typing endpoint works', async () => {
+    const { daemon, fetchMock } = makeDaemon();
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/typing',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { room_id: '!r:hs.example', agent: 'pi0-web1', typing: true },
+      }),
+    );
+    expect(res.status).toBe(200);
+    const typingCall = fetchMock.mock.calls
+      .map((c) => new URL(String(c[0])))
+      .find((u) => u.pathname.includes('/typing/'));
+    expect(typingCall).toBeDefined();
+  });
+
+  it('authenticated unknown bridge sub-paths return 405, never fall through', async () => {
+    const { daemon } = makeDaemon();
+    const res = await daemon.handle(
+      request({
+        method: 'GET',
+        path: '/bridge/v1/unknown',
+        authorizationHeader: 'Bearer bridge-secret',
+      }),
+    );
+    expect(res.status).toBe(405);
+  });
+
+  it('provisions a room as the AS sender with space linking', async () => {
+    const calls: Array<{ url: URL; body: unknown }> = [];
+    const fetchMock = vi.fn(async (input: URL | string, init?: RequestInit) => {
+      const url = new URL(String(input));
+      calls.push({ url, body: init?.body ? JSON.parse(String(init.body)) : undefined });
+      if (url.pathname.endsWith('/createRoom'))
+        return jsonResponse(200, { room_id: '!new:hs.example' });
+      return jsonResponse(200, {});
+    });
+    const daemon = new AppserviceDaemon(cfg, fetchMock as unknown as typeof fetch, () => {});
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/provision/rooms',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: {
+          name: 'proj-x',
+          alias: 'mosaic-proj-x',
+          invite: ['@jason.woltje:hs.example'],
+          space_id: '!space:hs.example',
+        },
+      }),
+    );
+    expect(res.status).toBe(200);
+    expect(res.body.room_id).toBe('!new:hs.example');
+    expect(res.body.space_linked).toBe(true);
+    const create = calls.find((c) => c.url.pathname.endsWith('/createRoom'));
+    expect(create!.url.searchParams.get('user_id')).toBe('@mosaic-as:hs.example');
+    const body = create!.body as Record<string, unknown>;
+    expect(body.room_alias_name).toBe('mosaic-proj-x');
+    expect((body.power_level_content_override as Record<string, unknown>).users).toEqual({
+      '@mosaic-as:hs.example': 100,
+    });
+    expect(calls.some((c) => c.url.pathname.includes('/state/m.space.child/'))).toBe(true);
+    expect(calls.some((c) => c.url.pathname.includes('/state/m.space.parent/'))).toBe(true);
+  });
+
+  it('space-link failure still returns the room id (no orphan)', async () => {
+    const fetchMock = vi.fn(async (input: URL | string) => {
+      const url = new URL(String(input));
+      if (url.pathname.endsWith('/createRoom'))
+        return jsonResponse(200, { room_id: '!new:hs.example' });
+      if (url.pathname.includes('/state/m.space.child/'))
+        return jsonResponse(403, { errcode: 'M_FORBIDDEN', error: 'no PL in space' });
+      return jsonResponse(200, {});
+    });
+    const daemon = new AppserviceDaemon(cfg, fetchMock as unknown as typeof fetch, () => {});
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/provision/rooms',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { name: 'proj-x', space_id: '!space:hs.example' },
+      }),
+    );
+    expect(res.status).toBe(200);
+    expect(res.body.room_id).toBe('!new:hs.example');
+    expect(res.body.space_linked).toBe(false);
+    expect(String(res.body.space_error)).toContain('403');
+  });
+
+  it('invite list cap enforced', async () => {
+    const { daemon } = makeDaemon();
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/provision/rooms',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { name: 'x', invite: Array.from({ length: 51 }, (_, i) => `@u${i}:hs`) },
+      }),
+    );
+    expect(res.status).toBe(400);
+  });
+
+  it('provision rejects bad payloads and requires auth', async () => {
+    const { daemon } = makeDaemon();
+    const noAuth = await daemon.handle(
+      request({ method: 'POST', path: '/bridge/v1/provision/rooms', body: { name: 'x' } }),
+    );
+    expect(noAuth.status).toBe(403);
+    const bad = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/provision/rooms',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { name: '', alias: 'BAD ALIAS' },
+      }),
+    );
+    expect(bad.status).toBe(400);
+  });
+
+  // A daemon whose fetch mock backs account_data with a mutable in-test object,
+  // so register/verify/revoke round-trip through the (faked) homeserver.
+  const makeAgentDaemon = () => {
+    const accountData: { value: Record<string, unknown> | null } = { value: null };
+    const fetchMock = vi.fn(async (input: URL | string, init?: RequestInit) => {
+      const url = new URL(String(input));
+      const path = url.pathname;
+      if (path.includes(`/account_data/${AGENTS_TYPE}`)) {
+        if (init?.method === 'PUT') {
+          accountData.value = JSON.parse(String(init.body)) as Record<string, unknown>;
+          return jsonResponse(200, {});
+        }
+        if (accountData.value === null) {
+          return jsonResponse(404, { errcode: 'M_NOT_FOUND', error: 'not found' });
+        }
+        return jsonResponse(200, accountData.value);
+      }
+      if (path.endsWith('/register')) return jsonResponse(200, { user_id: 'whatever' });
+      if (path.includes('/send/m.room.message/')) return jsonResponse(200, { event_id: '$sent' });
+      return jsonResponse(200, {});
+    });
+    const daemon = new AppserviceDaemon(cfg, fetchMock as unknown as typeof fetch, () => {});
+    return { daemon, fetchMock };
+  };
+
+  const registerAgent = async (
+    daemon: AppserviceDaemon,
+    body: Record<string, unknown> = { alias: 'pi0', host: 'web1' },
+  ) =>
+    daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/agents',
+        authorizationHeader: 'Bearer bridge-secret',
+        body,
+      }),
+    );
+
+  it('host token registers an agent and returns agent_user_id + bridge_token', async () => {
+    const { daemon, fetchMock } = makeAgentDaemon();
+    const res = await registerAgent(daemon, { alias: 'pi0', host: 'web1' });
+    expect(res.status).toBe(200);
+    expect(res.body.agent_user_id).toBe('@agent-pi0-web1:hs.example');
+    expect(String(res.body.bridge_token).startsWith('magt_')).toBe(true);
+    const registerCall = fetchMock.mock.calls
+      .map((c) => new URL(String(c[0])))
+      .find((u) => u.pathname.endsWith('/register'));
+    expect(registerCall).toBeDefined();
+  });
+
+  it('register requires a HOST token (agent token and no token are 403)', async () => {
+    const { daemon } = makeAgentDaemon();
+    const minted = await registerAgent(daemon);
+    const agentToken = String(minted.body.bridge_token);
+
+    const asAgent = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/agents',
+        authorizationHeader: `Bearer ${agentToken}`,
+        body: { alias: 'pi1', host: 'web2' },
+      }),
+    );
+    expect(asAgent.status).toBe(403);
+
+    const noAuth = await daemon.handle(
+      request({ method: 'POST', path: '/bridge/v1/agents', body: { alias: 'pi1', host: 'web2' } }),
+    );
+    expect(noAuth.status).toBe(403);
+  });
+
+  it('agent-scoped token may send as itself but not as another agent', async () => {
+    const { daemon } = makeAgentDaemon();
+    const minted = await registerAgent(daemon, { alias: 'pi0', host: 'web1' });
+    const agentToken = String(minted.body.bridge_token);
+
+    const self = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/messages',
+        authorizationHeader: `Bearer ${agentToken}`,
+        body: { room_id: '!r:hs.example', agent: 'pi0-web1', body: 'hi' },
+      }),
+    );
+    expect(self.status).toBe(200);
+
+    const other = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/messages',
+        authorizationHeader: `Bearer ${agentToken}`,
+        body: { room_id: '!r:hs.example', agent: 'pi9-web9', body: 'hi' },
+      }),
+    );
+    expect(other.status).toBe(403);
+    expect(other.body.error).toBe('token not scoped to this agent');
+  });
+
+  it('revoked agent token is rejected on messages', async () => {
+    const { daemon } = makeAgentDaemon();
+    const minted = await registerAgent(daemon, { alias: 'pi0', host: 'web1' });
+    const agentToken = String(minted.body.bridge_token);
+
+    const revoke = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/agents/revoke',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: { agent_user_id: '@agent-pi0-web1:hs.example' },
+      }),
+    );
+    expect(revoke.status).toBe(200);
+    expect(revoke.body.revoked).toBe(1);
+
+    const afterRevoke = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/messages',
+        authorizationHeader: `Bearer ${agentToken}`,
+        body: { room_id: '!r:hs.example', agent: 'pi0-web1', body: 'hi' },
+      }),
+    );
+    expect(afterRevoke.status).toBe(403);
+  });
+
+  it('GET /bridge/v1/agents lists registered agents (host only)', async () => {
+    const { daemon } = makeAgentDaemon();
+    await registerAgent(daemon, { alias: 'pi0', host: 'web1', display_name: 'Pi Zero' });
+
+    const res = await daemon.handle(
+      request({
+        method: 'GET',
+        path: '/bridge/v1/agents',
+        authorizationHeader: 'Bearer bridge-secret',
+      }),
+    );
+    expect(res.status).toBe(200);
+    const agents = res.body.agents as Array<Record<string, unknown>>;
+    expect(agents).toHaveLength(1);
+    expect(agents[0]?.agent_user_id).toBe('@agent-pi0-web1:hs.example');
+    expect(agents[0]?.display_name).toBe('Pi Zero');
+  });
+
+  it('empty bridge token list denies everything', async () => {
+    const daemon = new AppserviceDaemon({ ...cfg, bridgeTokens: [] }, undefined, () => {});
+    const res = await daemon.handle(
+      request({
+        method: 'POST',
+        path: '/bridge/v1/typing',
+        authorizationHeader: 'Bearer bridge-secret',
+        body: {},
+      }),
+    );
+    expect(res.status).toBe(403);
+  });
+});

apps/appservice/src/config.ts

@@ -0,0 +1,23 @@
+import type { DaemonConfig } from './server.js';
+
+const required = (name: string): string => {
+  const value = process.env[name];
+  if (!value) throw new Error(`missing required env var ${name}`);
+  return value;
+};
+
+export function configFromEnv(): DaemonConfig & { port: number } {
+  return {
+    homeserverUrl: required('MOSAIC_AS_HOMESERVER_URL'),
+    domain: required('MOSAIC_AS_DOMAIN'),
+    asToken: required('MOSAIC_AS_TOKEN'),
+    hsToken: required('MOSAIC_HS_TOKEN'),
+    userPrefix: process.env.MOSAIC_AS_USER_PREFIX ?? 'agent-',
+    senderLocalpart: process.env.MOSAIC_AS_SENDER_LOCALPART ?? 'mosaic-as',
+    bridgeTokens: (process.env.MOSAIC_AS_BRIDGE_TOKENS ?? '')
+      .split(',')
+      .map((t) => t.trim())
+      .filter(Boolean),
+    port: Number(process.env.MOSAIC_AS_PORT ?? 8008),
+  };
+}

apps/appservice/src/main.ts

@@ -0,0 +1,67 @@
+import http from 'node:http';
+
+import { configFromEnv } from './config.js';
+import { AppserviceDaemon } from './server.js';
+
+const cfg = configFromEnv();
+const daemon = new AppserviceDaemon(cfg);
+
+const MAX_BODY_BYTES = 1024 * 1024;
+
+const server = http.createServer((req, res) => {
+  const chunks: Buffer[] = [];
+  let received = 0;
+  let rejected = false;
+  req.on('data', (chunk: Buffer) => {
+    received += chunk.length;
+    if (received > MAX_BODY_BYTES) {
+      rejected = true;
+      res.writeHead(413, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify({ errcode: 'M_TOO_LARGE', error: 'request body too large' }));
+      req.destroy();
+      return;
+    }
+    chunks.push(chunk);
+  });
+  req.on('end', () => {
+    if (rejected) return;
+    void (async () => {
+      const url = new URL(req.url ?? '/', 'http://localhost');
+      let body: unknown;
+      try {
+        const raw = Buffer.concat(chunks).toString();
+        body = raw ? JSON.parse(raw) : undefined;
+      } catch {
+        res.writeHead(400, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ errcode: 'M_NOT_JSON', error: 'invalid json' }));
+        return;
+      }
+      const result = await daemon.handle({
+        method: req.method ?? 'GET',
+        path: url.pathname,
+        searchParams: url.searchParams,
+        authorizationHeader: req.headers.authorization,
+        body,
+      });
+      res.writeHead(result.status, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify(result.body));
+    })().catch((error: unknown) => {
+      console.error('request failed:', error);
+      if (res.headersSent) {
+        res.destroy();
+        return;
+      }
+      res.writeHead(500, { 'Content-Type': 'application/json' });
+      res.end(JSON.stringify({ error: 'internal error' }));
+    });
+  });
+});
+
+server.listen(cfg.port, () => {
+  console.log(
+    `mosaic-as listening on :${cfg.port} (homeserver ${cfg.homeserverUrl}, domain ${cfg.domain})`,
+  );
+  if (cfg.bridgeTokens.length === 0) {
+    console.warn('WARNING: MOSAIC_AS_BRIDGE_TOKENS is empty — bridge API will deny all requests');
+  }
+});

apps/appservice/src/registration-main.ts

@@ -0,0 +1,10 @@
+import { buildRegistration, registrationToYaml } from '@mosaicstack/appservice';
+
+import { configFromEnv } from './config.js';
+
+// Prints the Synapse registration YAML (mosaic-as.yaml) for the current env.
+// Usage: MOSAIC_AS_URL=http://mosaic-as:8008 mosaic-as-registration > mosaic-as.yaml
+const cfg = configFromEnv();
+const url = process.env.MOSAIC_AS_URL;
+if (!url) throw new Error('missing required env var MOSAIC_AS_URL');
+process.stdout.write(registrationToYaml(buildRegistration(cfg, { url })));

apps/appservice/src/server.ts

@@ -0,0 +1,225 @@
+import { createHmac, randomBytes, timingSafeEqual } from 'node:crypto';
+
+import {
+  AgentTokenStore,
+  AppserviceIntent,
+  TransactionHandler,
+  validateBridgeMessage,
+  validateBridgeTyping,
+  validateProvisionRoom,
+  validateRegisterAgent,
+  validateRevokeAgent,
+} from '@mosaicstack/appservice';
+import type { AppserviceConfig, MatrixEvent } from '@mosaicstack/appservice';
+
+export interface DaemonConfig extends AppserviceConfig {
+  /** Bearer tokens accepted on /bridge/v1/* (one per agent-comms host daemon). */
+  bridgeTokens: string[];
+}
+
+export interface DaemonRequest {
+  method: string;
+  /** URL path without query string. */
+  path: string;
+  searchParams: URLSearchParams;
+  authorizationHeader?: string;
+  body: unknown;
+}
+
+export interface DaemonResponse {
+  status: number;
+  body: Record<string, unknown>;
+}
+
+// Compare equal-length HMAC digests so neither content nor LENGTH of the
+// stored secret is observable through timing.
+const HMAC_KEY = randomBytes(32);
+const digest = (value: string): Buffer => createHmac('sha256', HMAC_KEY).update(value).digest();
+
+const safeEqual = (a: string, b: string): boolean => timingSafeEqual(digest(a), digest(b));
+
+const TXN_PATH = /^\/_matrix\/app\/v1\/transactions\/([^/]+)$/;
+
+/**
+ * Resolved identity for an authenticated /bridge/v1/* caller. Host principals
+ * (the agent-comms host daemons) are unrestricted; agent principals are scoped
+ * to a single virtual user and may only act as themselves.
+ */
+export type BridgePrincipal = { kind: 'host' } | { kind: 'agent'; agentUserId: string } | null;
+
+/**
+ * HTTP-framework-agnostic request router for the mosaic-as daemon: the
+ * Application Service transactions endpoint (Synapse-facing) plus the
+ * internal bridge API v1 (agent-comms daemon-facing). main.ts binds this to
+ * node:http; tests drive it directly.
+ */
+export class AppserviceDaemon {
+  readonly intent: AppserviceIntent;
+  private readonly transactions: TransactionHandler;
+  private readonly agents: AgentTokenStore;
+
+  constructor(
+    private readonly cfg: DaemonConfig,
+    fetchImpl?: typeof fetch,
+    private readonly log: (line: string) => void = (line) => console.log(line),
+  ) {
+    this.intent = new AppserviceIntent(cfg, fetchImpl);
+    this.agents = new AgentTokenStore(this.intent);
+    this.transactions = new TransactionHandler({
+      hsToken: cfg.hsToken,
+      onEvent: (event) => this.onEvent(event),
+      onError: (error, txnId) => this.log(`txn ${txnId} handler error: ${String(error)}`),
+    });
+  }
+
+  /** v1: the daemon only observes; room logic lives in the agent-comms daemons. */
+  private onEvent(event: MatrixEvent): void {
+    if (event.type === 'm.room.message') {
+      this.log(
+        `event ${event.event_id ?? '?'} in ${event.room_id ?? '?'} from ${event.sender ?? '?'}`,
+      );
+    }
+  }
+
+  /** Resolve the calling principal, or null when unauthorized. Fail-closed:
+   * host tokens win (timing-safe compare); otherwise a magt_* bearer is looked
+   * up in the agent token store; anything else is rejected. */
+  private async bridgeAuthorized(
+    authorizationHeader: string | undefined,
+  ): Promise<BridgePrincipal> {
+    if (!authorizationHeader?.startsWith('Bearer ')) return null;
+    const presented = authorizationHeader.slice('Bearer '.length);
+    if (this.cfg.bridgeTokens.some((token) => safeEqual(presented, token))) {
+      return { kind: 'host' };
+    }
+    const agentUserId = await this.agents.verifyToken(presented);
+    if (agentUserId) return { kind: 'agent', agentUserId };
+    return null;
+  }
+
+  async handle(req: DaemonRequest): Promise<DaemonResponse> {
+    if (req.method === 'GET' && req.path === '/health') {
+      return { status: 200, body: { ok: true } };
+    }
+
+    const txnMatch = req.method === 'PUT' ? TXN_PATH.exec(req.path) : null;
+    if (txnMatch?.[1] !== undefined) {
+      return this.transactions.handle(txnMatch[1], req.body, {
+        authorizationHeader: req.authorizationHeader,
+        accessTokenParam: req.searchParams.get('access_token') ?? undefined,
+      });
+    }
+
+    if (req.path.startsWith('/bridge/v1/')) {
+      const principal = await this.bridgeAuthorized(req.authorizationHeader);
+      if (!principal) {
+        return { status: 403, body: { errcode: 'M_FORBIDDEN', error: 'bad bridge token' } };
+      }
+      try {
+        if (req.method === 'POST' && req.path === '/bridge/v1/agents') {
+          if (principal.kind !== 'host') {
+            return {
+              status: 403,
+              body: { errcode: 'M_FORBIDDEN', error: 'agents cannot register agents' },
+            };
+          }
+          validateRegisterAgent(req.body);
+          const { agentUserId, token } = await this.agents.register({
+            alias: req.body.alias,
+            host: req.body.host,
+            displayName: req.body.display_name,
+          });
+          this.log(`registered agent ${agentUserId}`);
+          return { status: 200, body: { agent_user_id: agentUserId, bridge_token: token } };
+        }
+        if (req.method === 'POST' && req.path === '/bridge/v1/agents/revoke') {
+          if (principal.kind !== 'host') {
+            return {
+              status: 403,
+              body: { errcode: 'M_FORBIDDEN', error: 'agents cannot revoke agents' },
+            };
+          }
+          validateRevokeAgent(req.body);
+          const revoked = await this.agents.revoke(req.body.agent_user_id);
+          this.log(`revoked ${revoked} token(s) for ${req.body.agent_user_id}`);
+          return { status: 200, body: { revoked } };
+        }
+        if (req.method === 'GET' && req.path === '/bridge/v1/agents') {
+          if (principal.kind !== 'host') {
+            return {
+              status: 403,
+              body: { errcode: 'M_FORBIDDEN', error: 'agents cannot list agents' },
+            };
+          }
+          const agents = await this.agents.list();
+          return { status: 200, body: { agents } };
+        }
+        if (req.method === 'POST' && req.path === '/bridge/v1/messages') {
+          validateBridgeMessage(req.body);
+          if (
+            principal.kind === 'agent' &&
+            this.intent.agentUserId(req.body.agent) !== principal.agentUserId
+          ) {
+            return {
+              status: 403,
+              body: { errcode: 'M_FORBIDDEN', error: 'token not scoped to this agent' },
+            };
+          }
+          const eventId = await this.intent.sendAsAgent({
+            roomId: req.body.room_id,
+            agent: req.body.agent,
+            body: req.body.body,
+            threadRoot: req.body.thread_root,
+            msgtype: req.body.msgtype,
+            extraContent: req.body.extra_content,
+          });
+          return { status: 200, body: { event_id: eventId ?? null } };
+        }
+        if (req.method === 'POST' && req.path === '/bridge/v1/typing') {
+          validateBridgeTyping(req.body);
+          if (
+            principal.kind === 'agent' &&
+            this.intent.agentUserId(req.body.agent) !== principal.agentUserId
+          ) {
+            return {
+              status: 403,
+              body: { errcode: 'M_FORBIDDEN', error: 'token not scoped to this agent' },
+            };
+          }
+          await this.intent.setTyping(req.body.room_id, req.body.agent, req.body.typing);
+          return { status: 200, body: {} };
+        }
+        if (req.method === 'POST' && req.path === '/bridge/v1/provision/rooms') {
+          validateProvisionRoom(req.body);
+          const result = await this.intent.createRoom({
+            name: req.body.name,
+            alias: req.body.alias,
+            topic: req.body.topic,
+            invite: req.body.invite,
+            spaceId: req.body.space_id,
+          });
+          this.log(
+            `provisioned room ${result.roomId} (${req.body.name}) space_linked=${result.spaceLinked}`,
+          );
+          return {
+            status: 200,
+            body: {
+              room_id: result.roomId,
+              space_linked: result.spaceLinked,
+              ...(result.spaceError ? { space_error: result.spaceError } : {}),
+            },
+          };
+        }
+      } catch (error) {
+        const message = error instanceof Error ? error.message : String(error);
+        this.log(`bridge error ${req.method} ${req.path}: ${message}`);
+        return { status: 400, body: { error: message } };
+      }
+      // Explicit: never fall out of the authenticated bridge block, so future
+      // sub-paths cannot accidentally route around the auth guard above.
+      return { status: 405, body: { error: 'unsupported bridge method/path' } };
+    }
+
+    return { status: 404, body: { error: 'not found' } };
+  }
+}

apps/appservice/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}

apps/gateway/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.6",
   "repository": {
     "type": "git",
-    "url": "https://git.mosaicstack.dev/mosaicstack/mosaic-stack.git",
+    "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",
     "directory": "apps/gateway"
   },
   "type": "module",
@@ -31,6 +31,7 @@
     "@mariozechner/pi-ai": "^0.65.0",
     "@mariozechner/pi-coding-agent": "^0.65.0",
     "@modelcontextprotocol/sdk": "^1.27.1",
+    "@mosaicstack/agent": "workspace:^",
     "@mosaicstack/auth": "workspace:^",
     "@mosaicstack/brain": "workspace:^",
     "@mosaicstack/config": "workspace:^",
@@ -56,6 +57,7 @@
     "@opentelemetry/sdk-metrics": "^2.6.0",
     "@opentelemetry/sdk-node": "^0.213.0",
     "@opentelemetry/semantic-conventions": "^1.40.0",
+    "@peculiar/x509": "^2.0.0",
     "@sinclair/typebox": "^0.34.48",
     "better-auth": "^1.5.5",
     "bullmq": "^5.71.0",
@@ -63,12 +65,16 @@
     "class-validator": "^0.15.1",
     "dotenv": "^17.3.1",
     "fastify": "^5.0.0",
+    "ioredis": "^5.10.0",
+    "jose": "^6.2.2",
     "node-cron": "^4.2.1",
     "openai": "^6.32.0",
+    "postgres": "^3.4.8",
     "reflect-metadata": "^0.2.0",
     "rxjs": "^7.8.0",
     "socket.io": "^4.8.0",
     "uuid": "^11.0.0",
+    "undici": "^7.24.6",
     "zod": "^4.3.6"
   },
   "devDependencies": {

apps/gateway/src/__tests__/integration/federated-boot.pg-unreachable.integration.test.ts

@@ -0,0 +1,64 @@
+/**
+ * Test B — Gateway boot refuses (fail-fast) when PG is unreachable.
+ *
+ * Prereq: docker compose -f docker-compose.federated.yml --profile federated up -d
+ *         (Valkey must be running; only PG is intentionally misconfigured.)
+ * Run:    FEDERATED_INTEGRATION=1 pnpm --filter @mosaicstack/gateway test src/__tests__/integration/federated-boot.pg-unreachable.integration.test.ts
+ *
+ * Skipped when FEDERATED_INTEGRATION !== '1'.
+ */
+
+import net from 'node:net';
+import { beforeAll, describe, expect, it } from 'vitest';
+import { TierDetectionError, detectAndAssertTier } from '@mosaicstack/storage';
+
+const run = process.env['FEDERATED_INTEGRATION'] === '1';
+
+const VALKEY_URL = 'redis://localhost:6380';
+
+/**
+ * Reserves a guaranteed-closed port at runtime by binding to an ephemeral OS
+ * port (port 0) and immediately releasing it. The OS will not reassign the
+ * port during the TIME_WAIT window, so it remains closed for the duration of
+ * this test.
+ */
+async function reserveClosedPort(): Promise<number> {
+  return new Promise((resolve, reject) => {
+    const server = net.createServer();
+    server.listen(0, '127.0.0.1', () => {
+      const addr = server.address();
+      if (typeof addr !== 'object' || !addr) return reject(new Error('no addr'));
+      const port = addr.port;
+      server.close(() => resolve(port));
+    });
+    server.on('error', reject);
+  });
+}
+
+describe.skipIf(!run)('federated boot — PG unreachable', () => {
+  let badPgUrl: string;
+
+  beforeAll(async () => {
+    const closedPort = await reserveClosedPort();
+    badPgUrl = `postgresql://mosaic:mosaic@localhost:${closedPort}/mosaic`;
+  });
+
+  it('detectAndAssertTier throws TierDetectionError with service: postgres when PG is down', async () => {
+    const brokenConfig = {
+      tier: 'federated' as const,
+      storage: {
+        type: 'postgres' as const,
+        url: badPgUrl,
+        enableVector: true,
+      },
+      queue: {
+        type: 'bullmq',
+        url: VALKEY_URL,
+      },
+    };
+
+    await expect(detectAndAssertTier(brokenConfig)).rejects.toSatisfy(
+      (err: unknown) => err instanceof TierDetectionError && err.service === 'postgres',
+    );
+  }, 10_000);
+});

apps/gateway/src/__tests__/integration/federated-boot.success.integration.test.ts

@@ -0,0 +1,50 @@
+/**
+ * Test A — Gateway boot succeeds when federated services are up.
+ *
+ * Prereq: docker compose -f docker-compose.federated.yml --profile federated up -d
+ * Run:    FEDERATED_INTEGRATION=1 pnpm --filter @mosaicstack/gateway test src/__tests__/integration/federated-boot.success.integration.test.ts
+ *
+ * Skipped when FEDERATED_INTEGRATION !== '1'.
+ */
+
+import postgres from 'postgres';
+import { afterAll, describe, expect, it } from 'vitest';
+import { detectAndAssertTier } from '@mosaicstack/storage';
+
+const run = process.env['FEDERATED_INTEGRATION'] === '1';
+
+const PG_URL = 'postgresql://mosaic:mosaic@localhost:5433/mosaic';
+const VALKEY_URL = 'redis://localhost:6380';
+
+const federatedConfig = {
+  tier: 'federated' as const,
+  storage: {
+    type: 'postgres' as const,
+    url: PG_URL,
+    enableVector: true,
+  },
+  queue: {
+    type: 'bullmq',
+    url: VALKEY_URL,
+  },
+};
+
+describe.skipIf(!run)('federated boot — success path', () => {
+  let sql: ReturnType<typeof postgres> | undefined;
+
+  afterAll(async () => {
+    if (sql) {
+      await sql.end({ timeout: 2 }).catch(() => {});
+    }
+  });
+
+  it('detectAndAssertTier resolves without throwing when federated services are up', async () => {
+    await expect(detectAndAssertTier(federatedConfig)).resolves.toBeUndefined();
+  }, 10_000);
+
+  it('pgvector extension is registered (pg_extension row exists)', async () => {
+    sql = postgres(PG_URL, { max: 1, connect_timeout: 5, idle_timeout: 5 });
+    const rows = await sql`SELECT * FROM pg_extension WHERE extname = 'vector'`;
+    expect(rows).toHaveLength(1);
+  }, 10_000);
+});

apps/gateway/src/__tests__/integration/federated-pgvector.integration.test.ts

@@ -0,0 +1,43 @@
+/**
+ * Test C — pgvector extension is functional end-to-end.
+ *
+ * Creates a temp table with a vector(3) column, inserts a row, and queries it
+ * back — confirming the extension is not just registered but operational.
+ *
+ * Prereq: docker compose -f docker-compose.federated.yml --profile federated up -d
+ * Run:    FEDERATED_INTEGRATION=1 pnpm --filter @mosaicstack/gateway test src/__tests__/integration/federated-pgvector.integration.test.ts
+ *
+ * Skipped when FEDERATED_INTEGRATION !== '1'.
+ */
+
+import postgres from 'postgres';
+import { afterAll, describe, expect, it } from 'vitest';
+
+const run = process.env['FEDERATED_INTEGRATION'] === '1';
+
+const PG_URL = 'postgresql://mosaic:mosaic@localhost:5433/mosaic';
+
+let sql: ReturnType<typeof postgres> | undefined;
+
+afterAll(async () => {
+  if (sql) {
+    await sql.end({ timeout: 2 }).catch(() => {});
+  }
+});
+
+describe.skipIf(!run)('federated pgvector — functional end-to-end', () => {
+  it('vector ops round-trip: INSERT [1,2,3] and SELECT returns [1,2,3]', async () => {
+    sql = postgres(PG_URL, { max: 1, connect_timeout: 5, idle_timeout: 5 });
+
+    await sql`CREATE TEMP TABLE t (id int, embedding vector(3))`;
+    await sql`INSERT INTO t VALUES (1, '[1,2,3]')`;
+    const rows = await sql`SELECT embedding FROM t`;
+
+    expect(rows).toHaveLength(1);
+    // The postgres driver returns vector columns as strings like '[1,2,3]'.
+    // Normalise by parsing the string representation.
+    const raw = rows[0]?.['embedding'] as string;
+    const parsed = JSON.parse(raw) as number[];
+    expect(parsed).toEqual([1, 2, 3]);
+  }, 10_000);
+});

apps/gateway/src/__tests__/integration/federation-m2-e2e.integration.test.ts

@@ -0,0 +1,243 @@
+/**
+ * Federation M2 E2E test — peer-add enrollment flow (FED-M2-10).
+ *
+ * Covers MILESTONES.md acceptance test #6:
+ *   "`peer add <url>` on Server A yields an `active` peer record with a valid cert + key"
+ *
+ * This test simulates two gateways using a single bootstrapped NestJS app:
+ *   - "Server A": the admin API that generates a keypair and stores the cert
+ *   - "Server B": the enrollment endpoint that signs the CSR
+ *   Both share the same DB + Step-CA in the test environment.
+ *
+ * Prerequisites:
+ *   docker compose -f docker-compose.federated.yml --profile federated up -d
+ *
+ * Run:
+ *   FEDERATED_INTEGRATION=1 STEP_CA_AVAILABLE=1 \
+ *   STEP_CA_URL=https://localhost:9000 \
+ *   STEP_CA_PROVISIONER_KEY_JSON="$(docker exec $(docker ps -qf name=step-ca) cat /home/step/secrets/mosaic-fed.json)" \
+ *   STEP_CA_ROOT_CERT_PATH=/tmp/step-ca-root.crt \
+ *   pnpm --filter @mosaicstack/gateway test \
+ *     src/__tests__/integration/federation-m2-e2e.integration.test.ts
+ *
+ * Obtaining Step-CA credentials:
+ *   # Extract provisioner key from running container:
+ *   #   docker exec $(docker ps -qf name=step-ca) cat /home/step/secrets/mosaic-fed.json
+ *   # Copy root cert from container:
+ *   #   docker cp $(docker ps -qf name=step-ca):/home/step/certs/root_ca.crt /tmp/step-ca-root.crt
+ *   # Then: export STEP_CA_ROOT_CERT_PATH=/tmp/step-ca-root.crt
+ *
+ * Skipped unless both FEDERATED_INTEGRATION=1 and STEP_CA_AVAILABLE=1 are set.
+ */
+
+import * as crypto from 'node:crypto';
+import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+import { Test } from '@nestjs/testing';
+import { ValidationPipe } from '@nestjs/common';
+import { FastifyAdapter, type NestFastifyApplication } from '@nestjs/platform-fastify';
+import supertest from 'supertest';
+import {
+  createDb,
+  type Db,
+  type DbHandle,
+  federationPeers,
+  federationGrants,
+  federationEnrollmentTokens,
+  inArray,
+  eq,
+} from '@mosaicstack/db';
+import * as schema from '@mosaicstack/db';
+import { DB } from '../../database/database.module.js';
+import { AdminGuard } from '../../admin/admin.guard.js';
+import { FederationModule } from '../../federation/federation.module.js';
+import { GrantsService } from '../../federation/grants.service.js';
+import { EnrollmentService } from '../../federation/enrollment.service.js';
+
+const run = process.env['FEDERATED_INTEGRATION'] === '1';
+const stepCaRun =
+  run &&
+  process.env['STEP_CA_AVAILABLE'] === '1' &&
+  !!process.env['STEP_CA_URL'] &&
+  !!process.env['STEP_CA_PROVISIONER_KEY_JSON'] &&
+  !!process.env['STEP_CA_ROOT_CERT_PATH'];
+
+const PG_URL = 'postgresql://mosaic:mosaic@localhost:5433/mosaic';
+
+const RUN_ID = crypto.randomUUID();
+
+describe.skipIf(!stepCaRun)('federation M2 E2E — peer add enrollment flow', () => {
+  let handle: DbHandle;
+  let db: Db;
+  let app: NestFastifyApplication;
+  let agent: ReturnType<typeof supertest>;
+  let grantsService: GrantsService;
+  let enrollmentService: EnrollmentService;
+
+  const createdTokenGrantIds: string[] = [];
+  const createdGrantIds: string[] = [];
+  const createdPeerIds: string[] = [];
+  const createdUserIds: string[] = [];
+
+  beforeAll(async () => {
+    process.env['BETTER_AUTH_SECRET'] ??= 'test-e2e-sealing-key';
+
+    handle = createDb(PG_URL);
+    db = handle.db;
+
+    const moduleRef = await Test.createTestingModule({
+      imports: [FederationModule],
+      providers: [{ provide: DB, useValue: db }],
+    })
+      .overrideGuard(AdminGuard)
+      .useValue({ canActivate: () => true })
+      .compile();
+
+    app = moduleRef.createNestApplication<NestFastifyApplication>(new FastifyAdapter());
+    app.useGlobalPipes(new ValidationPipe({ whitelist: true, transform: true }));
+    await app.init();
+    await app.getHttpAdapter().getInstance().ready();
+
+    agent = supertest(app.getHttpServer());
+
+    grantsService = moduleRef.get(GrantsService);
+    enrollmentService = moduleRef.get(EnrollmentService);
+  }, 30_000);
+
+  afterAll(async () => {
+    if (db && createdTokenGrantIds.length > 0) {
+      await db
+        .delete(federationEnrollmentTokens)
+        .where(inArray(federationEnrollmentTokens.grantId, createdTokenGrantIds))
+        .catch((e: unknown) => console.error('[federation-m2-e2e cleanup]', e));
+    }
+    if (db && createdGrantIds.length > 0) {
+      await db
+        .delete(federationGrants)
+        .where(inArray(federationGrants.id, createdGrantIds))
+        .catch((e: unknown) => console.error('[federation-m2-e2e cleanup]', e));
+    }
+    if (db && createdPeerIds.length > 0) {
+      await db
+        .delete(federationPeers)
+        .where(inArray(federationPeers.id, createdPeerIds))
+        .catch((e: unknown) => console.error('[federation-m2-e2e cleanup]', e));
+    }
+    if (db && createdUserIds.length > 0) {
+      await db
+        .delete(schema.users)
+        .where(inArray(schema.users.id, createdUserIds))
+        .catch((e: unknown) => console.error('[federation-m2-e2e cleanup]', e));
+    }
+    if (app)
+      await app.close().catch((e: unknown) => console.error('[federation-m2-e2e cleanup]', e));
+    if (handle)
+      await handle.close().catch((e: unknown) => console.error('[federation-m2-e2e cleanup]', e));
+  });
+
+  // -------------------------------------------------------------------------
+  // #6 — peer add: keypair → enrollment → cert storage → active peer record
+  // -------------------------------------------------------------------------
+  it('#6 — peer add flow: keypair → enrollment → cert storage → active peer record', async () => {
+    // Create a subject user to satisfy FK on federation_grants.subject_user_id
+    const userId = crypto.randomUUID();
+    await db
+      .insert(schema.users)
+      .values({
+        id: userId,
+        name: `e2e-user-${RUN_ID}`,
+        email: `e2e-${RUN_ID}@federation-test.invalid`,
+        emailVerified: false,
+      })
+      .onConflictDoNothing();
+    createdUserIds.push(userId);
+
+    // ── Step A: "Server B" setup ─────────────────────────────────────────
+    // Server B admin creates a grant and generates an enrollment token to
+    // share out-of-band with Server A's operator.
+
+    // Insert a placeholder peer on "Server B" to satisfy the grant FK
+    const serverBPeerId = crypto.randomUUID();
+    await db
+      .insert(federationPeers)
+      .values({
+        id: serverBPeerId,
+        commonName: `server-b-peer-${RUN_ID}`,
+        displayName: 'Server B Placeholder',
+        certPem: '-----BEGIN CERTIFICATE-----\nMOCK\n-----END CERTIFICATE-----\n',
+        certSerial: `serial-b-${serverBPeerId}`,
+        certNotAfter: new Date(Date.now() + 365 * 24 * 60 * 60 * 1000),
+        state: 'pending',
+      })
+      .onConflictDoNothing();
+    createdPeerIds.push(serverBPeerId);
+
+    const grant = await grantsService.createGrant({
+      subjectUserId: userId,
+      scope: { resources: ['tasks'], excluded_resources: [], max_rows_per_query: 100 },
+      peerId: serverBPeerId,
+    });
+    createdGrantIds.push(grant.id);
+    createdTokenGrantIds.push(grant.id);
+
+    const { token } = await enrollmentService.createToken({
+      grantId: grant.id,
+      peerId: serverBPeerId,
+      ttlSeconds: 900,
+    });
+
+    // ── Step B: "Server A" generates keypair ─────────────────────────────
+    const keypairRes = await agent
+      .post('/api/admin/federation/peers/keypair')
+      .send({
+        commonName: `e2e-peer-${RUN_ID.slice(0, 8)}`,
+        displayName: 'E2E Test Peer',
+        endpointUrl: 'https://test.invalid',
+      })
+      .set('Content-Type', 'application/json');
+
+    expect(keypairRes.status).toBe(201);
+    const { peerId, csrPem } = keypairRes.body as { peerId: string; csrPem: string };
+    expect(typeof peerId).toBe('string');
+    expect(csrPem).toContain('-----BEGIN CERTIFICATE REQUEST-----');
+    createdPeerIds.push(peerId);
+
+    // ── Step C: Enrollment (simulates Server A sending CSR to Server B) ──
+    const enrollRes = await agent
+      .post(`/api/federation/enrollment/${token}`)
+      .send({ csrPem })
+      .set('Content-Type', 'application/json');
+
+    expect(enrollRes.status).toBe(200);
+    const { certPem, certChainPem } = enrollRes.body as {
+      certPem: string;
+      certChainPem: string;
+    };
+    expect(certPem).toContain('-----BEGIN CERTIFICATE-----');
+    expect(certChainPem).toContain('-----BEGIN CERTIFICATE-----');
+
+    // ── Step D: "Server A" stores the cert ───────────────────────────────
+    const storeRes = await agent
+      .patch(`/api/admin/federation/peers/${peerId}/cert`)
+      .send({ certPem })
+      .set('Content-Type', 'application/json');
+
+    expect(storeRes.status).toBe(200);
+
+    // ── Step E: Verify peer record in DB ─────────────────────────────────
+    const [peer] = await db
+      .select()
+      .from(federationPeers)
+      .where(eq(federationPeers.id, peerId))
+      .limit(1);
+
+    expect(peer).toBeDefined();
+    expect(peer?.state).toBe('active');
+    expect(peer?.certPem).toContain('-----BEGIN CERTIFICATE-----');
+    expect(typeof peer?.certSerial).toBe('string');
+    expect((peer?.certSerial ?? '').length).toBeGreaterThan(0);
+    // clientKeyPem is a sealed ciphertext — must not be a raw PEM
+    expect(peer?.clientKeyPem?.startsWith('-----BEGIN')).toBe(false);
+    // certNotAfter must be in the future
+    expect(peer?.certNotAfter?.getTime()).toBeGreaterThan(Date.now());
+  }, 60_000);
+});

apps/gateway/src/__tests__/integration/federation-m2.integration.test.ts

@@ -0,0 +1,483 @@
+/**
+ * Federation M2 integration tests (FED-M2-09).
+ *
+ * Covers MILESTONES.md acceptance tests #1, #2, #3, #5, #7, #8.
+ *
+ * Prerequisites:
+ *   docker compose -f docker-compose.federated.yml --profile federated up -d
+ *
+ * Run DB-only tests (no Step-CA):
+ *   FEDERATED_INTEGRATION=1 BETTER_AUTH_SECRET=test-secret pnpm --filter @mosaicstack/gateway test \
+ *     src/__tests__/integration/federation-m2.integration.test.ts
+ *
+ * Run all tests including Step-CA-dependent ones:
+ *   FEDERATED_INTEGRATION=1 STEP_CA_AVAILABLE=1 \
+ *   STEP_CA_URL=https://localhost:9000 \
+ *   STEP_CA_PROVISIONER_KEY_JSON="$(docker exec $(docker ps -qf name=step-ca) cat /home/step/secrets/mosaic-fed.json)" \
+ *   STEP_CA_ROOT_CERT_PATH=/tmp/step-ca-root.crt \
+ *   pnpm --filter @mosaicstack/gateway test \
+ *     src/__tests__/integration/federation-m2.integration.test.ts
+ *
+ * Obtaining Step-CA credentials:
+ *   # Extract provisioner key from running container:
+ *   #   docker exec $(docker ps -qf name=step-ca) cat /home/step/secrets/mosaic-fed.json
+ *   # Copy root cert from container:
+ *   #   docker cp $(docker ps -qf name=step-ca):/home/step/certs/root_ca.crt /tmp/step-ca-root.crt
+ *   # Then: export STEP_CA_ROOT_CERT_PATH=/tmp/step-ca-root.crt
+ */
+
+import * as crypto from 'node:crypto';
+import { afterAll, beforeAll, describe, expect, it } from 'vitest';
+import { Test } from '@nestjs/testing';
+import { GoneException } from '@nestjs/common';
+import { Pkcs10CertificateRequestGenerator, X509Certificate as PeculiarX509 } from '@peculiar/x509';
+import {
+  createDb,
+  type Db,
+  type DbHandle,
+  federationPeers,
+  federationGrants,
+  federationEnrollmentTokens,
+  inArray,
+  eq,
+} from '@mosaicstack/db';
+import * as schema from '@mosaicstack/db';
+import { seal } from '@mosaicstack/auth';
+import { DB } from '../../database/database.module.js';
+import { GrantsService } from '../../federation/grants.service.js';
+import { EnrollmentService } from '../../federation/enrollment.service.js';
+import { CaService } from '../../federation/ca.service.js';
+import { FederationScopeError } from '../../federation/scope-schema.js';
+
+const run = process.env['FEDERATED_INTEGRATION'] === '1';
+const stepCaRun = run && process.env['STEP_CA_AVAILABLE'] === '1';
+
+const PG_URL = 'postgresql://mosaic:mosaic@localhost:5433/mosaic';
+
+// ---------------------------------------------------------------------------
+// Helpers for test data isolation
+// ---------------------------------------------------------------------------
+
+/** Unique run prefix to identify rows created by this test run. */
+const RUN_ID = crypto.randomUUID();
+
+/** Insert a minimal user row to satisfy the FK on federation_grants.subject_user_id. */
+async function insertTestUser(db: Db, id: string): Promise<void> {
+  await db
+    .insert(schema.users)
+    .values({
+      id,
+      name: `test-user-${id}`,
+      email: `test-${id}@federation-test.invalid`,
+      emailVerified: false,
+    })
+    .onConflictDoNothing();
+}
+
+/** Insert a minimal peer row to satisfy the FK on federation_grants.peer_id. */
+async function insertTestPeer(db: Db, id: string, suffix: string = ''): Promise<void> {
+  await db
+    .insert(federationPeers)
+    .values({
+      id,
+      commonName: `test-peer-${RUN_ID}-${suffix}`,
+      displayName: `Test Peer ${suffix}`,
+      certPem: '-----BEGIN CERTIFICATE-----\nMOCK\n-----END CERTIFICATE-----\n',
+      certSerial: `test-serial-${id}`,
+      certNotAfter: new Date(Date.now() + 365 * 24 * 60 * 60 * 1000),
+      state: 'pending',
+    })
+    .onConflictDoNothing();
+}
+
+// ---------------------------------------------------------------------------
+// DB-only test module (CaService mocked so env vars not required)
+// ---------------------------------------------------------------------------
+
+function buildDbModule(db: Db) {
+  return Test.createTestingModule({
+    providers: [
+      { provide: DB, useValue: db },
+      GrantsService,
+      {
+        provide: CaService,
+        useValue: {
+          issueCert: async () => {
+            throw new Error('CaService.issueCert should not be called in DB-only tests');
+          },
+        },
+      },
+      EnrollmentService,
+    ],
+  }).compile();
+}
+
+// ---------------------------------------------------------------------------
+// Test suite — DB-only (no Step-CA)
+// ---------------------------------------------------------------------------
+
+describe.skipIf(!run)('federation M2 — DB-only tests', () => {
+  let handle: DbHandle;
+  let db: Db;
+  let grantsService: GrantsService;
+
+  /** IDs created during this run — cleaned up in afterAll. */
+  const createdGrantIds: string[] = [];
+  const createdPeerIds: string[] = [];
+  const createdUserIds: string[] = [];
+
+  beforeAll(async () => {
+    process.env['BETTER_AUTH_SECRET'] ??= 'test-integration-sealing-key-not-for-prod';
+
+    handle = createDb(PG_URL);
+    db = handle.db;
+
+    const moduleRef = await buildDbModule(db);
+    grantsService = moduleRef.get(GrantsService);
+  });
+
+  afterAll(async () => {
+    // Clean up in FK-safe order: tokens → grants → peers → users
+    if (db && createdGrantIds.length > 0) {
+      await db
+        .delete(federationEnrollmentTokens)
+        .where(inArray(federationEnrollmentTokens.grantId, createdGrantIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+      await db
+        .delete(federationGrants)
+        .where(inArray(federationGrants.id, createdGrantIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+    }
+    if (db && createdPeerIds.length > 0) {
+      await db
+        .delete(federationPeers)
+        .where(inArray(federationPeers.id, createdPeerIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+    }
+    if (db && createdUserIds.length > 0) {
+      await db
+        .delete(schema.users)
+        .where(inArray(schema.users.id, createdUserIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+    }
+    if (handle)
+      await handle.close().catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+  });
+
+  // -------------------------------------------------------------------------
+  // #1 — grant create writes a pending row
+  // -------------------------------------------------------------------------
+  it('#1 — createGrant writes a pending row to DB', async () => {
+    const userId = crypto.randomUUID();
+    const peerId = crypto.randomUUID();
+    const validScope = {
+      resources: ['tasks'],
+      excluded_resources: [],
+      max_rows_per_query: 100,
+    };
+
+    await insertTestUser(db, userId);
+    await insertTestPeer(db, peerId, 'test1');
+    createdUserIds.push(userId);
+    createdPeerIds.push(peerId);
+
+    const grant = await grantsService.createGrant({
+      subjectUserId: userId,
+      scope: validScope,
+      peerId,
+    });
+
+    createdGrantIds.push(grant.id);
+
+    // Verify the row exists in DB with correct shape
+    const [row] = await db
+      .select()
+      .from(federationGrants)
+      .where(eq(federationGrants.id, grant.id))
+      .limit(1);
+
+    expect(row).toBeDefined();
+    expect(row?.status).toBe('pending');
+    expect(row?.peerId).toBe(peerId);
+    expect(row?.subjectUserId).toBe(userId);
+    const storedScope = row?.scope as Record<string, unknown>;
+    expect(storedScope['resources']).toEqual(['tasks']);
+    expect(storedScope['max_rows_per_query']).toBe(100);
+  }, 15_000);
+
+  // -------------------------------------------------------------------------
+  // #7 — scope with unknown resource type rejected
+  // -------------------------------------------------------------------------
+  it('#7 — createGrant rejects scope with unknown resource type', async () => {
+    const userId = crypto.randomUUID();
+    const peerId = crypto.randomUUID();
+    const invalidScope = {
+      resources: ['totally_unknown_resource'],
+      excluded_resources: [],
+      max_rows_per_query: 100,
+    };
+
+    await insertTestUser(db, userId);
+    await insertTestPeer(db, peerId, 'test7');
+    createdUserIds.push(userId);
+    createdPeerIds.push(peerId);
+
+    await expect(
+      grantsService.createGrant({
+        subjectUserId: userId,
+        scope: invalidScope,
+        peerId,
+      }),
+    ).rejects.toThrow(FederationScopeError);
+  }, 15_000);
+
+  // -------------------------------------------------------------------------
+  // #8 — listGrants returns accurate status for grants in various states
+  // -------------------------------------------------------------------------
+  it('#8 — listGrants returns accurate status for grants in various states', async () => {
+    const userId = crypto.randomUUID();
+    const peerId = crypto.randomUUID();
+    const validScope = {
+      resources: ['notes'],
+      excluded_resources: [],
+      max_rows_per_query: 50,
+    };
+
+    await insertTestUser(db, userId);
+    await insertTestPeer(db, peerId, 'test8');
+    createdUserIds.push(userId);
+    createdPeerIds.push(peerId);
+
+    // Create two pending grants via GrantsService
+    const grantA = await grantsService.createGrant({
+      subjectUserId: userId,
+      scope: validScope,
+      peerId,
+    });
+    const grantB = await grantsService.createGrant({
+      subjectUserId: userId,
+      scope: { resources: ['tasks'], excluded_resources: [], max_rows_per_query: 50 },
+      peerId,
+    });
+    createdGrantIds.push(grantA.id, grantB.id);
+
+    // Insert a third grant directly in 'revoked' state to test status variety
+    const [grantC] = await db
+      .insert(federationGrants)
+      .values({
+        id: crypto.randomUUID(),
+        subjectUserId: userId,
+        peerId,
+        scope: validScope,
+        status: 'revoked',
+        revokedAt: new Date(),
+      })
+      .returning();
+    createdGrantIds.push(grantC!.id);
+
+    // List all grants for this peer
+    const allForPeer = await grantsService.listGrants({ peerId });
+
+    const ourGrantIds = new Set([grantA.id, grantB.id, grantC!.id]);
+    const ourGrants = allForPeer.filter((g) => ourGrantIds.has(g.id));
+    expect(ourGrants).toHaveLength(3);
+
+    const pendingGrants = ourGrants.filter((g) => g.status === 'pending');
+    const revokedGrants = ourGrants.filter((g) => g.status === 'revoked');
+    expect(pendingGrants).toHaveLength(2);
+    expect(revokedGrants).toHaveLength(1);
+
+    // Status-filtered query
+    const pendingOnly = await grantsService.listGrants({ peerId, status: 'pending' });
+    const ourPending = pendingOnly.filter((g) => ourGrantIds.has(g.id));
+    expect(ourPending.every((g) => g.status === 'pending')).toBe(true);
+
+    // Verify peer list from DB also shows the peer rows with correct state
+    const peers = await db.select().from(federationPeers).where(eq(federationPeers.id, peerId));
+    expect(peers).toHaveLength(1);
+    expect(peers[0]?.state).toBe('pending');
+  }, 15_000);
+
+  // -------------------------------------------------------------------------
+  // #5 — client_key_pem encrypted at rest
+  // -------------------------------------------------------------------------
+  it('#5 — clientKeyPem stored in DB is a sealed ciphertext (not a valid PEM)', async () => {
+    const peerId = crypto.randomUUID();
+    const rawPem = '-----BEGIN PRIVATE KEY-----\nMOCK\n-----END PRIVATE KEY-----\n';
+    const sealed = seal(rawPem);
+
+    await db.insert(federationPeers).values({
+      id: peerId,
+      commonName: `test-peer-${RUN_ID}-sealed`,
+      displayName: 'Sealed Key Test Peer',
+      certPem: '-----BEGIN CERTIFICATE-----\nMOCK\n-----END CERTIFICATE-----\n',
+      certSerial: `test-serial-sealed-${peerId}`,
+      certNotAfter: new Date(Date.now() + 365 * 24 * 60 * 60 * 1000),
+      state: 'pending',
+      clientKeyPem: sealed,
+    });
+    createdPeerIds.push(peerId);
+
+    const [row] = await db
+      .select()
+      .from(federationPeers)
+      .where(eq(federationPeers.id, peerId))
+      .limit(1);
+
+    expect(row).toBeDefined();
+    // The stored value must NOT be a valid PEM — it's a sealed ciphertext blob
+    expect(row?.clientKeyPem).toBeDefined();
+    expect(row?.clientKeyPem?.startsWith('-----BEGIN')).toBe(false);
+    // The sealed value should be non-trivial (at least 20 chars)
+    expect((row?.clientKeyPem ?? '').length).toBeGreaterThan(20);
+  }, 15_000);
+});
+
+// ---------------------------------------------------------------------------
+// Test suite — Step-CA gated
+// ---------------------------------------------------------------------------
+
+describe.skipIf(!stepCaRun)('federation M2 — Step-CA tests', () => {
+  let handle: DbHandle;
+  let db: Db;
+  let grantsService: GrantsService;
+  let enrollmentService: EnrollmentService;
+
+  const createdGrantIds: string[] = [];
+  const createdPeerIds: string[] = [];
+  const createdUserIds: string[] = [];
+
+  beforeAll(async () => {
+    handle = createDb(PG_URL);
+    db = handle.db;
+
+    // Use real CaService — env vars (STEP_CA_URL, STEP_CA_PROVISIONER_KEY_JSON,
+    // STEP_CA_ROOT_CERT_PATH) must be set when STEP_CA_AVAILABLE=1
+    const moduleRef = await Test.createTestingModule({
+      providers: [{ provide: DB, useValue: db }, CaService, GrantsService, EnrollmentService],
+    }).compile();
+
+    grantsService = moduleRef.get(GrantsService);
+    enrollmentService = moduleRef.get(EnrollmentService);
+  });
+
+  afterAll(async () => {
+    if (db && createdGrantIds.length > 0) {
+      await db
+        .delete(federationEnrollmentTokens)
+        .where(inArray(federationEnrollmentTokens.grantId, createdGrantIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+      await db
+        .delete(federationGrants)
+        .where(inArray(federationGrants.id, createdGrantIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+    }
+    if (db && createdPeerIds.length > 0) {
+      await db
+        .delete(federationPeers)
+        .where(inArray(federationPeers.id, createdPeerIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+    }
+    if (db && createdUserIds.length > 0) {
+      await db
+        .delete(schema.users)
+        .where(inArray(schema.users.id, createdUserIds))
+        .catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+    }
+    if (handle)
+      await handle.close().catch((e: unknown) => console.error('[federation-m2-test cleanup]', e));
+  });
+
+  /** Generate a P-256 key pair and PKCS#10 CSR, returning the CSR as PEM. */
+  async function generateCsrPem(cn: string): Promise<string> {
+    const alg = { name: 'ECDSA', namedCurve: 'P-256', hash: 'SHA-256' };
+    const keyPair = await crypto.subtle.generateKey(alg, true, ['sign', 'verify']);
+    const csr = await Pkcs10CertificateRequestGenerator.create({
+      name: `CN=${cn}`,
+      keys: keyPair,
+      signingAlgorithm: alg,
+    });
+    return csr.toString('pem');
+  }
+
+  // -------------------------------------------------------------------------
+  // #2 — enrollment signs CSR and returns cert
+  // -------------------------------------------------------------------------
+  it('#2 — redeem returns a certPem containing a valid PEM certificate', async () => {
+    const userId = crypto.randomUUID();
+    const peerId = crypto.randomUUID();
+    const validScope = {
+      resources: ['tasks'],
+      excluded_resources: [],
+      max_rows_per_query: 100,
+    };
+
+    await insertTestUser(db, userId);
+    await insertTestPeer(db, peerId, 'ca-test2');
+    createdUserIds.push(userId);
+    createdPeerIds.push(peerId);
+
+    const grant = await grantsService.createGrant({
+      subjectUserId: userId,
+      scope: validScope,
+      peerId,
+    });
+    createdGrantIds.push(grant.id);
+
+    const { token } = await enrollmentService.createToken({
+      grantId: grant.id,
+      peerId,
+      ttlSeconds: 900,
+    });
+
+    const csrPem = await generateCsrPem(`gateway-test-${RUN_ID.slice(0, 8)}`);
+    const result = await enrollmentService.redeem(token, csrPem);
+
+    expect(result.certPem).toContain('-----BEGIN CERTIFICATE-----');
+    expect(result.certChainPem).toContain('-----BEGIN CERTIFICATE-----');
+
+    // Verify the issued cert parses cleanly
+    const cert = new PeculiarX509(result.certPem);
+    expect(cert.serialNumber).toBeTruthy();
+  }, 30_000);
+
+  // -------------------------------------------------------------------------
+  // #3 — token single-use; second attempt returns GoneException
+  // -------------------------------------------------------------------------
+  it('#3 — second redeem of the same token throws GoneException', async () => {
+    const userId = crypto.randomUUID();
+    const peerId = crypto.randomUUID();
+    const validScope = {
+      resources: ['notes'],
+      excluded_resources: [],
+      max_rows_per_query: 50,
+    };
+
+    await insertTestUser(db, userId);
+    await insertTestPeer(db, peerId, 'ca-test3');
+    createdUserIds.push(userId);
+    createdPeerIds.push(peerId);
+
+    const grant = await grantsService.createGrant({
+      subjectUserId: userId,
+      scope: validScope,
+      peerId,
+    });
+    createdGrantIds.push(grant.id);
+
+    const { token } = await enrollmentService.createToken({
+      grantId: grant.id,
+      peerId,
+      ttlSeconds: 900,
+    });
+
+    const csrPem = await generateCsrPem(`gateway-test-replay-${RUN_ID.slice(0, 8)}`);
+
+    // First redeem must succeed
+    const result = await enrollmentService.redeem(token, csrPem);
+    expect(result.certPem).toContain('-----BEGIN CERTIFICATE-----');
+
+    // Second redeem with the same token must be rejected
+    await expect(enrollmentService.redeem(token, csrPem)).rejects.toThrow(GoneException);
+  }, 30_000);
+});

apps/gateway/src/admin/admin-health.controller.ts

@@ -20,7 +20,7 @@ export class AdminHealthController {
   async check(): Promise<HealthStatusDto> {
     const [database, cache] = await Promise.all([this.checkDatabase(), this.checkCache()]);
 
-    const sessions = this.agentService.listSessions();
+    const sessions = this.agentService.listAllSessionsForSystem();
     const providers = this.providerService.listProviders();
 
     const allOk = database.status === 'ok' && cache.status === 'ok';

apps/gateway/src/agent/__tests__/agent-service-ownership.test.ts

@@ -0,0 +1,142 @@
+import { ForbiddenException } from '@nestjs/common';
+import { describe, expect, it, vi } from 'vitest';
+import { AgentService, type AgentSession } from '../agent.service.js';
+import type { ActorTenantScope } from '../../auth/session-scope.js';
+
+const CONVERSATION_ID = '22222222-2222-4222-8222-222222222222';
+const OWNER_SCOPE: ActorTenantScope = { userId: 'owner-user', tenantId: 'owner-tenant' };
+const FOREIGN_SCOPE: ActorTenantScope = { userId: 'foreign-user', tenantId: 'foreign-tenant' };
+
+type AgentServiceInternals = {
+  sessions: Map<string, AgentSession>;
+  creating: Map<string, Promise<AgentSession>>;
+};
+
+function makeService(): AgentService {
+  return new AgentService(
+    {} as never,
+    {} as never,
+    {} as never,
+    { available: false } as never,
+    {} as never,
+    {} as never,
+    {} as never,
+    null,
+    null,
+    { collect: vi.fn().mockResolvedValue(undefined) } as never,
+  );
+}
+
+function internals(service: AgentService): AgentServiceInternals {
+  return service as unknown as AgentServiceInternals;
+}
+
+function makeSession(scope: ActorTenantScope = OWNER_SCOPE): AgentSession {
+  return {
+    id: CONVERSATION_ID,
+    provider: 'test-provider',
+    modelId: 'test-model',
+    piSession: {
+      thinkingLevel: 'off',
+      getAvailableThinkingLevels: vi.fn().mockReturnValue(['off', 'low', 'high']),
+      setThinkingLevel: vi.fn(),
+      abort: vi.fn().mockResolvedValue(undefined),
+      prompt: vi.fn().mockResolvedValue(undefined),
+      dispose: vi.fn(),
+      getSessionStats: vi.fn(),
+      getContextUsage: vi.fn(),
+    } as unknown as AgentSession['piSession'],
+    listeners: new Set(),
+    unsubscribe: vi.fn(),
+    createdAt: Date.now(),
+    promptCount: 0,
+    channels: new Set(),
+    skillPromptAdditions: [],
+    sandboxDir: '/tmp/tess-session-ownership-test',
+    allowedTools: null,
+    userId: scope.userId,
+    tenantId: scope.tenantId,
+    metrics: {
+      tokens: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+      modelSwitches: 0,
+      messageCount: 0,
+      lastActivityAt: new Date('2026-07-12T00:00:00Z').toISOString(),
+    },
+  };
+}
+
+describe('AgentService owner/tenant scope enforcement', () => {
+  it('allows owner-scoped operations and rejects foreign scopes for seeded sessions', async () => {
+    const service = makeService();
+    const session = makeSession();
+    internals(service).sessions.set(CONVERSATION_ID, session);
+
+    expect(service.getSession(CONVERSATION_ID, OWNER_SCOPE)).toBe(session);
+    expect(service.getSession(CONVERSATION_ID, FOREIGN_SCOPE)).toBeUndefined();
+    expect(service.getSessionInfo(CONVERSATION_ID, FOREIGN_SCOPE)).toBeUndefined();
+    expect(service.listSessions(OWNER_SCOPE)).toHaveLength(1);
+    expect(service.listSessions(FOREIGN_SCOPE)).toEqual([]);
+
+    service.addChannel(CONVERSATION_ID, 'websocket:owner', OWNER_SCOPE);
+    expect(session.channels.has('websocket:owner')).toBe(true);
+    expect(() => service.addChannel(CONVERSATION_ID, 'websocket:foreign', FOREIGN_SCOPE)).toThrow(
+      ForbiddenException,
+    );
+    expect(() => service.removeChannel(CONVERSATION_ID, 'websocket:owner', FOREIGN_SCOPE)).toThrow(
+      ForbiddenException,
+    );
+
+    expect(() =>
+      service.updateSessionModel(CONVERSATION_ID, 'foreign-model', FOREIGN_SCOPE),
+    ).toThrow(ForbiddenException);
+    service.updateSessionModel(CONVERSATION_ID, 'owner-model', OWNER_SCOPE);
+    expect(session.modelId).toBe('owner-model');
+
+    expect(() =>
+      service.applyAgentConfig(CONVERSATION_ID, 'agent-foreign', 'Foreign Agent', FOREIGN_SCOPE),
+    ).toThrow(ForbiddenException);
+    service.applyAgentConfig(CONVERSATION_ID, 'agent-owner', 'Owner Agent', OWNER_SCOPE);
+    expect(session.agentConfigId).toBe('agent-owner');
+
+    expect(() => service.onEvent(CONVERSATION_ID, vi.fn(), FOREIGN_SCOPE)).toThrow(
+      ForbiddenException,
+    );
+    const cleanup = service.onEvent(CONVERSATION_ID, vi.fn(), OWNER_SCOPE);
+    cleanup();
+
+    await expect(
+      service.prompt(CONVERSATION_ID, 'foreign prompt', FOREIGN_SCOPE),
+    ).rejects.toBeInstanceOf(ForbiddenException);
+    await service.prompt(CONVERSATION_ID, 'owner prompt', OWNER_SCOPE);
+    expect(session.piSession.prompt).toHaveBeenCalledWith('owner prompt');
+
+    await expect(service.destroySession(CONVERSATION_ID, FOREIGN_SCOPE)).rejects.toBeInstanceOf(
+      ForbiddenException,
+    );
+    expect(internals(service).sessions.has(CONVERSATION_ID)).toBe(true);
+
+    await service.destroySession(CONVERSATION_ID, OWNER_SCOPE);
+    expect(session.piSession.dispose).toHaveBeenCalled();
+    expect(internals(service).sessions.has(CONVERSATION_ID)).toBe(false);
+  });
+
+  it('checks owner/tenant scope before returning an in-flight session creation', async () => {
+    const service = makeService();
+    const session = makeSession();
+    internals(service).creating.set(CONVERSATION_ID, Promise.resolve(session));
+
+    await expect(
+      service.createSession(CONVERSATION_ID, {
+        userId: FOREIGN_SCOPE.userId,
+        tenantId: FOREIGN_SCOPE.tenantId,
+      }),
+    ).rejects.toBeInstanceOf(ForbiddenException);
+
+    await expect(
+      service.createSession(CONVERSATION_ID, {
+        userId: OWNER_SCOPE.userId,
+        tenantId: OWNER_SCOPE.tenantId,
+      }),
+    ).resolves.toBe(session);
+  });
+});

apps/gateway/src/agent/__tests__/runtime-provider-registry.service.test.ts

@@ -0,0 +1,285 @@
+import { describe, expect, it } from 'vitest';
+import type {
+  AgentRuntimeProvider,
+  RuntimeAttachHandle,
+  RuntimeAttachMode,
+  RuntimeCapability,
+  RuntimeCapabilitySet,
+  RuntimeHealth,
+  RuntimeMessage,
+  RuntimeScope,
+  RuntimeSession,
+  RuntimeSessionTree,
+  RuntimeStreamEvent,
+} from '@mosaicstack/types';
+import { AgentRuntimeProviderRegistry } from '@mosaicstack/agent';
+import type { ActorTenantScope } from '../../auth/session-scope.js';
+import {
+  RuntimeProviderService,
+  type RuntimeAuditEvent,
+  type RuntimeAuditSink,
+  type RuntimeApprovalVerifier,
+} from '../runtime-provider-registry.service.js';
+
+const OWNER_SCOPE: ActorTenantScope = { userId: 'owner-1', tenantId: 'tenant-1' };
+const CONTEXT = {
+  actorScope: OWNER_SCOPE,
+  channelId: 'cli',
+  correlationId: 'correlation-1',
+};
+
+class RecordingRuntimeProvider implements AgentRuntimeProvider {
+  readonly id = 'fleet';
+  readonly receivedScopes: RuntimeScope[] = [];
+  readonly sentMessages: RuntimeMessage[] = [];
+  terminateCalls = 0;
+  throwAfterSend = false;
+
+  constructor(private readonly supported: RuntimeCapability[]) {}
+
+  async capabilities(scope: RuntimeScope): Promise<RuntimeCapabilitySet> {
+    this.receivedScopes.push(scope);
+    return { supported: this.supported };
+  }
+
+  async health(scope: RuntimeScope): Promise<RuntimeHealth> {
+    this.receivedScopes.push(scope);
+    return { status: 'healthy', checkedAt: '2026-07-12T00:00:00.000Z' };
+  }
+
+  async listSessions(scope: RuntimeScope): Promise<RuntimeSession[]> {
+    this.receivedScopes.push(scope);
+    return [];
+  }
+
+  async getSessionTree(scope: RuntimeScope): Promise<RuntimeSessionTree[]> {
+    this.receivedScopes.push(scope);
+    return [];
+  }
+
+  async *streamSession(
+    _sessionId: string,
+    _cursor: string | undefined,
+    scope: RuntimeScope,
+  ): AsyncIterable<RuntimeStreamEvent> {
+    this.receivedScopes.push(scope);
+    return;
+  }
+
+  async sendMessage(
+    _sessionId: string,
+    message: RuntimeMessage,
+    scope: RuntimeScope,
+  ): Promise<void> {
+    this.receivedScopes.push(scope);
+    this.sentMessages.push(message);
+    if (this.throwAfterSend) {
+      throw new Error('provider acknowledgement failed');
+    }
+  }
+
+  async attach(
+    sessionId: string,
+    mode: RuntimeAttachMode,
+    scope: RuntimeScope,
+  ): Promise<RuntimeAttachHandle> {
+    this.receivedScopes.push(scope);
+    return {
+      attachmentId: 'attachment-1',
+      sessionId,
+      mode,
+      expiresAt: '2026-07-12T00:00:00.000Z',
+    };
+  }
+
+  async detach(_attachmentId: string, scope: RuntimeScope): Promise<void> {
+    this.receivedScopes.push(scope);
+  }
+
+  async terminate(_sessionId: string, _approvalRef: string, scope: RuntimeScope): Promise<void> {
+    this.receivedScopes.push(scope);
+    this.terminateCalls += 1;
+  }
+}
+
+class RecordingAuditSink implements RuntimeAuditSink {
+  readonly events: RuntimeAuditEvent[] = [];
+
+  async record(event: RuntimeAuditEvent): Promise<void> {
+    this.events.push(event);
+  }
+}
+
+class DenyingApprovalVerifier implements RuntimeApprovalVerifier {
+  async consume(): Promise<boolean> {
+    return false;
+  }
+}
+
+class AcceptingApprovalVerifier implements RuntimeApprovalVerifier {
+  consumedAction: Parameters<RuntimeApprovalVerifier['consume']>[1] | undefined;
+
+  async consume(
+    _approvalRef: string,
+    action: Parameters<RuntimeApprovalVerifier['consume']>[1],
+  ): Promise<boolean> {
+    this.consumedAction = action;
+    return true;
+  }
+}
+
+function makeService(
+  provider: RecordingRuntimeProvider,
+  audit: RuntimeAuditSink = new RecordingAuditSink(),
+  approval: RuntimeApprovalVerifier = new DenyingApprovalVerifier(),
+): RuntimeProviderService {
+  const registry = new AgentRuntimeProviderRegistry();
+  registry.register(provider);
+  return new RuntimeProviderService(registry, audit, approval);
+}
+
+describe('RuntimeProviderService security boundary', (): void => {
+  it('derives and freezes only the authenticated actor scope while preserving correlation metadata', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider(['session.send']);
+    const audit = new RecordingAuditSink();
+    const service = makeService(provider, audit);
+
+    await service.sendMessage(
+      'fleet',
+      'session-1',
+      { content: 'hello', idempotencyKey: 'key-1' },
+      CONTEXT,
+    );
+
+    const providerScope = provider.receivedScopes[0];
+    expect(providerScope).toEqual({
+      actorId: OWNER_SCOPE.userId,
+      tenantId: OWNER_SCOPE.tenantId,
+      channelId: CONTEXT.channelId,
+      correlationId: CONTEXT.correlationId,
+    });
+    expect(Object.isFrozen(providerScope)).toBe(true);
+    expect(audit.events).toContainEqual({
+      providerId: 'fleet',
+      operation: 'session.send',
+      outcome: 'succeeded',
+      actorId: OWNER_SCOPE.userId,
+      tenantId: OWNER_SCOPE.tenantId,
+      channelId: CONTEXT.channelId,
+      correlationId: CONTEXT.correlationId,
+      resourceId: 'session-1',
+    });
+    expect(JSON.stringify(audit.events)).not.toContain('hello');
+    expect(JSON.stringify(audit.events)).not.toContain('key-1');
+  });
+
+  it('fails closed before a provider side effect when a capability is missing', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider([]);
+    const service = makeService(provider);
+
+    await expect(
+      service.sendMessage(
+        'fleet',
+        'session-1',
+        { content: 'hello', idempotencyKey: 'key-1' },
+        CONTEXT,
+      ),
+    ).rejects.toThrow(/capability denied/);
+    expect(provider.sentMessages).toEqual([]);
+  });
+
+  it('requires a consumed exact-action approval before termination', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider(['session.terminate']);
+    const approval = new DenyingApprovalVerifier();
+    const service = makeService(provider, new RecordingAuditSink(), approval);
+
+    await expect(
+      service.terminate('fleet', 'session-1', 'forged-approval', CONTEXT),
+    ).rejects.toThrow(/approval denied/);
+    expect(provider.terminateCalls).toBe(0);
+  });
+
+  it('binds an accepted termination approval to provider, session, immutable scope, and correlation', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider(['session.terminate']);
+    const approval = new AcceptingApprovalVerifier();
+    const service = makeService(provider, new RecordingAuditSink(), approval);
+
+    await service.terminate('fleet', 'session-1', 'approval-1', CONTEXT);
+
+    expect(approval.consumedAction).toEqual({
+      providerId: 'fleet',
+      sessionId: 'session-1',
+      actorId: OWNER_SCOPE.userId,
+      tenantId: OWNER_SCOPE.tenantId,
+      channelId: CONTEXT.channelId,
+      correlationId: CONTEXT.correlationId,
+    });
+    expect(provider.terminateCalls).toBe(1);
+  });
+
+  it('fails closed before invoking a provider when audit persistence rejects the request', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider(['session.send']);
+    const unavailableAudit: RuntimeAuditSink = {
+      async record(): Promise<void> {
+        throw new Error('audit unavailable');
+      },
+    };
+    const service = makeService(provider, unavailableAudit);
+
+    await expect(
+      service.sendMessage(
+        'fleet',
+        'session-1',
+        { content: 'hello', idempotencyKey: 'key-1' },
+        CONTEXT,
+      ),
+    ).rejects.toThrow(/audit unavailable/);
+    expect(provider.sentMessages).toEqual([]);
+  });
+
+  it('records a provider error after invocation as failed rather than denied', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider(['session.send']);
+    provider.throwAfterSend = true;
+    const audit = new RecordingAuditSink();
+    const service = makeService(provider, audit);
+
+    await expect(
+      service.sendMessage(
+        'fleet',
+        'session-1',
+        { content: 'hello', idempotencyKey: 'key-1' },
+        CONTEXT,
+      ),
+    ).rejects.toThrow(/provider acknowledgement failed/);
+    expect(provider.sentMessages).toHaveLength(1);
+    expect(audit.events.map((event: RuntimeAuditEvent): string => event.outcome)).toEqual([
+      'requested',
+      'failed',
+    ]);
+  });
+
+  it('does not misreport a completed provider side effect when completion auditing fails', async (): Promise<void> => {
+    const provider = new RecordingRuntimeProvider(['session.send']);
+    let auditCalls = 0;
+    const audit: RuntimeAuditSink = {
+      async record(): Promise<void> {
+        auditCalls += 1;
+        if (auditCalls === 2) {
+          throw new Error('completion audit unavailable');
+        }
+      },
+    };
+    const service = makeService(provider, audit);
+
+    await expect(
+      service.sendMessage(
+        'fleet',
+        'session-1',
+        { content: 'hello', idempotencyKey: 'key-1' },
+        CONTEXT,
+      ),
+    ).resolves.toBeUndefined();
+    expect(provider.sentMessages).toHaveLength(1);
+    expect(auditCalls).toBe(2);
+  });
+});

apps/gateway/src/agent/__tests__/session-ownership.test.ts

@@ -0,0 +1,262 @@
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import { ForbiddenException, NotFoundException } from '@nestjs/common';
+import { describe, expect, it, vi } from 'vitest';
+
+vi.mock('../agent.service.js', () => ({ AgentService: class AgentService {} }));
+vi.mock('../../commands/command-executor.service.js', () => ({
+  CommandExecutorService: class CommandExecutorService {},
+}));
+vi.mock('../routing/routing-engine.service.js', () => ({
+  RoutingEngineService: class RoutingEngineService {},
+}));
+
+import { SessionsController } from '../sessions.controller.js';
+import { ChatController } from '../../chat/chat.controller.js';
+import { ChatGateway } from '../../chat/chat.gateway.js';
+import type { AgentSession } from '../agent.service.js';
+import type { SessionInfoDto } from '../session.dto.js';
+
+const USER_A = { id: 'user-a', tenantId: 'tenant-a' };
+const USER_B = { id: 'user-b', tenantId: 'tenant-b' };
+const CONVERSATION_ID = '11111111-1111-4111-8111-111111111111';
+
+function makeSessionInfo(overrides?: Partial<SessionInfoDto>): SessionInfoDto {
+  return {
+    id: CONVERSATION_ID,
+    provider: 'test-provider',
+    modelId: 'test-model',
+    createdAt: new Date('2026-07-12T00:00:00Z').toISOString(),
+    promptCount: 0,
+    channels: [],
+    durationMs: 0,
+    metrics: {
+      tokens: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+      modelSwitches: 0,
+      messageCount: 0,
+      lastActivityAt: new Date('2026-07-12T00:00:00Z').toISOString(),
+    },
+    ...overrides,
+  };
+}
+
+function makeAgentSession(owner = USER_A): AgentSession {
+  return {
+    id: CONVERSATION_ID,
+    provider: 'test-provider',
+    modelId: 'test-model',
+    piSession: {
+      thinkingLevel: 'off',
+      getAvailableThinkingLevels: vi.fn().mockReturnValue(['off', 'low', 'high']),
+      setThinkingLevel: vi.fn(),
+      abort: vi.fn().mockResolvedValue(undefined),
+      prompt: vi.fn().mockResolvedValue(undefined),
+      dispose: vi.fn(),
+      getSessionStats: vi.fn(),
+      getContextUsage: vi.fn(),
+    } as unknown as AgentSession['piSession'],
+    listeners: new Set(),
+    unsubscribe: vi.fn(),
+    createdAt: Date.now(),
+    promptCount: 0,
+    channels: new Set(),
+    skillPromptAdditions: [],
+    sandboxDir: '/tmp',
+    allowedTools: null,
+    userId: owner.id,
+    tenantId: owner.tenantId,
+    metrics: {
+      tokens: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+      modelSwitches: 0,
+      messageCount: 0,
+      lastActivityAt: new Date('2026-07-12T00:00:00Z').toISOString(),
+    },
+  };
+}
+
+function makeScopedAgentService() {
+  const foreign = makeAgentSession(USER_A);
+  return {
+    listSessions: vi.fn((scope?: { userId: string; tenantId?: string }) =>
+      scope?.userId === USER_B.id ? [] : [makeSessionInfo({ id: foreign.id })],
+    ),
+    getSessionInfo: vi.fn((_id: string, scope?: { userId: string; tenantId?: string }) =>
+      scope?.userId === USER_B.id ? undefined : makeSessionInfo({ id: foreign.id }),
+    ),
+    destroySession: vi.fn(),
+    getSession: vi.fn((_id: string, scope?: { userId: string; tenantId?: string }) =>
+      scope?.userId === USER_B.id ? undefined : foreign,
+    ),
+    createSession: vi.fn().mockRejectedValue(new ForbiddenException('Session scope mismatch')),
+    onEvent: vi.fn(() => vi.fn()),
+    addChannel: vi.fn(),
+    removeChannel: vi.fn(),
+    recordMessage: vi.fn(),
+    prompt: vi.fn().mockResolvedValue(undefined),
+  };
+}
+
+describe('TESS-M1-SEC-002 AgentService ownership boundary', () => {
+  it('requires explicit owner+tenant scope on protected session operations', () => {
+    const source = readFileSync(resolve('src/agent/agent.service.ts'), 'utf8');
+
+    expect(source).toContain('getSession(sessionId: string, scope: ActorTenantScope)');
+    expect(source).toContain('listSessions(scope: ActorTenantScope)');
+    expect(source).toContain('getSessionInfo(sessionId: string, scope: ActorTenantScope)');
+    expect(source).toContain(
+      'addChannel(sessionId: string, channel: string, scope: ActorTenantScope)',
+    );
+    expect(source).toContain(
+      'removeChannel(sessionId: string, channel: string, scope: ActorTenantScope)',
+    );
+    expect(source).toContain(
+      'async prompt(sessionId: string, message: string, scope: ActorTenantScope)',
+    );
+    expect(source).toContain('scope: ActorTenantScope,');
+    expect(source).toContain('async destroySession(sessionId: string, scope: ActorTenantScope)');
+    expect(source).not.toContain('scope?: ActorTenantScope');
+  });
+});
+
+describe('TESS-M1-SEC-002 REST session ownership and tenant binding', () => {
+  it('lists only sessions owned by the authenticated owner+tenant scope', () => {
+    const agentService = makeScopedAgentService();
+    const controller = new SessionsController(agentService as never);
+
+    expect(controller.list(USER_B)).toEqual({ sessions: [], total: 0 });
+    expect(agentService.listSessions).toHaveBeenCalledWith({
+      userId: USER_B.id,
+      tenantId: USER_B.tenantId,
+    });
+  });
+
+  it('does not reveal another owner/tenant session by guessed id', () => {
+    const agentService = makeScopedAgentService();
+    const controller = new SessionsController(agentService as never);
+
+    expect(() => controller.findOne(CONVERSATION_ID, USER_B)).toThrow(NotFoundException);
+    expect(agentService.getSessionInfo).toHaveBeenCalledWith(CONVERSATION_ID, {
+      userId: USER_B.id,
+      tenantId: USER_B.tenantId,
+    });
+  });
+
+  it('does not terminate another owner/tenant session by guessed id', async () => {
+    const agentService = makeScopedAgentService();
+    const controller = new SessionsController(agentService as never);
+
+    await expect(controller.destroy(CONVERSATION_ID, USER_B)).rejects.toBeInstanceOf(
+      NotFoundException,
+    );
+    expect(agentService.destroySession).not.toHaveBeenCalled();
+  });
+});
+
+describe('TESS-M1-SEC-002 REST chat send ownership and tenant binding', () => {
+  it('does not send a prompt into another owner/tenant session by guessed conversationId', async () => {
+    const agentService = makeScopedAgentService();
+    const controller = new ChatController(agentService as never);
+
+    await expect(
+      controller.chat({ conversationId: CONVERSATION_ID, content: 'take over' }, USER_B),
+    ).rejects.toMatchObject({ status: 404 });
+
+    expect(agentService.getSession).toHaveBeenCalledWith(CONVERSATION_ID, {
+      userId: USER_B.id,
+      tenantId: USER_B.tenantId,
+    });
+    expect(agentService.prompt).not.toHaveBeenCalled();
+  });
+});
+
+describe('TESS-M1-SEC-002 WebSocket session ownership and tenant binding', () => {
+  function makeGateway(agentService = makeScopedAgentService()) {
+    const brain = {
+      conversations: {
+        findById: vi.fn().mockResolvedValue(undefined),
+        create: vi.fn().mockResolvedValue(undefined),
+        update: vi.fn().mockResolvedValue(undefined),
+        findMessages: vi.fn().mockResolvedValue([]),
+        addMessage: vi.fn().mockResolvedValue(undefined),
+      },
+    };
+    const commandRegistry = { getManifest: vi.fn().mockReturnValue([]) };
+    const commandExecutor = { execute: vi.fn() };
+    const routingEngine = {
+      resolve: vi.fn().mockResolvedValue({ provider: 'test', model: 'test-model' }),
+    };
+    const gateway = new ChatGateway(
+      agentService as never,
+      {} as never,
+      brain as never,
+      commandRegistry as never,
+      commandExecutor as never,
+      routingEngine as never,
+    );
+    return { gateway, agentService };
+  }
+
+  function makeSocket() {
+    return {
+      id: 'socket-b',
+      connected: true,
+      data: { user: USER_B, session: { id: 'auth-session-b', userId: USER_B.id } },
+      emit: vi.fn(),
+      disconnect: vi.fn(),
+    };
+  }
+
+  it('does not attach or send to another owner/tenant session by guessed conversationId', async () => {
+    const { gateway, agentService } = makeGateway();
+    const socket = makeSocket();
+
+    await gateway.handleMessage(socket as never, {
+      conversationId: CONVERSATION_ID,
+      content: 'attach to foreign session',
+    });
+
+    expect(agentService.getSession).toHaveBeenCalledWith(CONVERSATION_ID, {
+      userId: USER_B.id,
+      tenantId: USER_B.tenantId,
+    });
+    expect(agentService.onEvent).not.toHaveBeenCalled();
+    expect(agentService.addChannel).not.toHaveBeenCalled();
+    expect(agentService.prompt).not.toHaveBeenCalled();
+    expect(socket.emit).toHaveBeenCalledWith(
+      'error',
+      expect.objectContaining({ conversationId: CONVERSATION_ID }),
+    );
+  });
+
+  it('does not mutate thinking level on another owner/tenant session', () => {
+    const { gateway, agentService } = makeGateway();
+    const socket = makeSocket();
+
+    gateway.handleSetThinking(socket as never, { conversationId: CONVERSATION_ID, level: 'high' });
+
+    expect(agentService.getSession).toHaveBeenCalledWith(CONVERSATION_ID, {
+      userId: USER_B.id,
+      tenantId: USER_B.tenantId,
+    });
+    expect(socket.emit).toHaveBeenCalledWith(
+      'error',
+      expect.objectContaining({ conversationId: CONVERSATION_ID }),
+    );
+  });
+
+  it('does not terminate another owner/tenant session over WebSocket abort', async () => {
+    const { gateway, agentService } = makeGateway();
+    const socket = makeSocket();
+
+    await gateway.handleAbort(socket as never, { conversationId: CONVERSATION_ID });
+
+    expect(agentService.getSession).toHaveBeenCalledWith(CONVERSATION_ID, {
+      userId: USER_B.id,
+      tenantId: USER_B.tenantId,
+    });
+    expect(socket.emit).toHaveBeenCalledWith(
+      'error',
+      expect.objectContaining({ conversationId: CONVERSATION_ID }),
+    );
+  });
+});

apps/gateway/src/agent/agent.module.ts

@@ -1,4 +1,5 @@
 import { Global, Module } from '@nestjs/common';
+import { AgentRuntimeProviderRegistry } from '@mosaicstack/agent';
 import { AgentService } from './agent.service.js';
 import { ProviderService } from './provider.service.js';
 import { ProviderCredentialsService } from './provider-credentials.service.js';
@@ -13,6 +14,14 @@ import { CoordModule } from '../coord/coord.module.js';
 import { McpClientModule } from '../mcp-client/mcp-client.module.js';
 import { SkillsModule } from '../skills/skills.module.js';
 import { GCModule } from '../gc/gc.module.js';
+import {
+  AGENT_RUNTIME_PROVIDER_REGISTRY,
+  DenyRuntimeApprovalVerifier,
+  RUNTIME_APPROVAL_VERIFIER,
+  RUNTIME_PROVIDER_AUDIT_SINK,
+  RuntimeProviderAuditService,
+  RuntimeProviderService,
+} from './runtime-provider-registry.service.js';
 
 @Global()
 @Module({
@@ -23,6 +32,21 @@ import { GCModule } from '../gc/gc.module.js';
     RoutingService,
     RoutingEngineService,
     SkillLoaderService,
+    {
+      provide: AGENT_RUNTIME_PROVIDER_REGISTRY,
+      useFactory: (): AgentRuntimeProviderRegistry => new AgentRuntimeProviderRegistry(),
+    },
+    RuntimeProviderAuditService,
+    {
+      provide: RUNTIME_PROVIDER_AUDIT_SINK,
+      useExisting: RuntimeProviderAuditService,
+    },
+    DenyRuntimeApprovalVerifier,
+    {
+      provide: RUNTIME_APPROVAL_VERIFIER,
+      useExisting: DenyRuntimeApprovalVerifier,
+    },
+    RuntimeProviderService,
     AgentService,
   ],
   controllers: [ProvidersController, SessionsController, AgentConfigsController, RoutingController],
@@ -33,6 +57,8 @@ import { GCModule } from '../gc/gc.module.js';
     RoutingService,
     RoutingEngineService,
     SkillLoaderService,
+    RuntimeProviderService,
+    AGENT_RUNTIME_PROVIDER_REGISTRY,
   ],
 })
 export class AgentModule {}

apps/gateway/src/agent/agent.service.ts

@@ -1,4 +1,11 @@
-import { Inject, Injectable, Logger, Optional, type OnModuleDestroy } from '@nestjs/common';
+import {
+  ForbiddenException,
+  Inject,
+  Injectable,
+  Logger,
+  Optional,
+  type OnModuleDestroy,
+} from '@nestjs/common';
 import {
   createAgentSession,
   DefaultResourceLoader,
@@ -28,6 +35,7 @@ import type { SessionInfoDto, SessionMetrics } from './session.dto.js';
 import { SystemOverrideService } from '../preferences/system-override.service.js';
 import { PreferencesService } from '../preferences/preferences.service.js';
 import { SessionGCService } from '../gc/session-gc.service.js';
+import type { ActorTenantScope } from '../auth/session-scope.js';
 
 /** A single message from DB conversation history, used for context injection. */
 export interface ConversationHistoryMessage {
@@ -68,6 +76,8 @@ export interface AgentSessionOptions {
   agentConfigId?: string;
   /** ID of the user who owns this session. Used for preferences and system override lookups. */
   userId?: string;
+  /** Server-derived tenant scope that owns this session. Falls back to userId for solo users. */
+  tenantId?: string;
   /**
    * Prior conversation messages to inject as context when resuming a session.
    * These messages are formatted and prepended to the system prompt so the
@@ -94,6 +104,8 @@ export interface AgentSession {
   allowedTools: string[] | null;
   /** User ID that owns this session, used for preference lookups. */
   userId?: string;
+  /** Server-derived tenant scope that owns this session. Falls back to userId for solo users. */
+  tenantId?: string;
   /** Agent config ID applied to this session, if any (M5-001). */
   agentConfigId?: string;
   /** Human-readable agent name applied to this session, if any (M5-001). */
@@ -174,12 +186,20 @@ export class AgentService implements OnModuleDestroy {
       .filter((t) => t.length > 0);
   }
 
-  async createSession(sessionId: string, options?: AgentSessionOptions): Promise<AgentSession> {
+  async createSession(sessionId: string, options: AgentSessionOptions): Promise<AgentSession> {
+    const scope = this.scopeFromOptions(options);
     const existing = this.sessions.get(sessionId);
-    if (existing) return existing;
+    if (existing) {
+      this.assertSessionScope(existing, scope);
+      return existing;
+    }
 
     const inflight = this.creating.get(sessionId);
-    if (inflight) return inflight;
+    if (inflight) {
+      const session = await inflight;
+      this.assertSessionScope(session, scope);
+      return session;
+    }
 
     const promise = this.doCreateSession(sessionId, options).finally(() => {
       this.creating.delete(sessionId);
@@ -342,6 +362,7 @@ export class AgentService implements OnModuleDestroy {
       sandboxDir,
       allowedTools,
       userId: mergedOptions?.userId,
+      tenantId: this.tenantIdFor(mergedOptions?.userId, mergedOptions?.tenantId),
       agentConfigId: mergedOptions?.agentConfigId,
       agentName: resolvedAgentName,
       metrics: {
@@ -473,38 +494,70 @@ export class AgentService implements OnModuleDestroy {
     return this.providerService.getDefaultModel() ?? null;
   }
 
-  getSession(sessionId: string): AgentSession | undefined {
+  getSession(sessionId: string, scope: ActorTenantScope): AgentSession | undefined {
-    return this.sessions.get(sessionId);
+    const session = this.sessions.get(sessionId);
+    if (!session || !this.sessionMatchesScope(session, scope)) return undefined;
+    return session;
   }
 
-  listSessions(): SessionInfoDto[] {
+  listSessions(scope: ActorTenantScope): SessionInfoDto[] {
     const now = Date.now();
-    return Array.from(this.sessions.values()).map((s) => ({
+    return Array.from(this.sessions.values())
-      id: s.id,
+      .filter((s) => this.sessionMatchesScope(s, scope))
-      provider: s.provider,
+      .map((s) => this.toSessionInfo(s, now));
-      modelId: s.modelId,
-      ...(s.agentName ? { agentName: s.agentName } : {}),
-      createdAt: new Date(s.createdAt).toISOString(),
-      promptCount: s.promptCount,
-      channels: Array.from(s.channels),
-      durationMs: now - s.createdAt,
-      metrics: { ...s.metrics },
-    }));
   }
 
-  getSessionInfo(sessionId: string): SessionInfoDto | undefined {
+  listAllSessionsForSystem(): SessionInfoDto[] {
+    const now = Date.now();
+    return Array.from(this.sessions.values()).map((s) => this.toSessionInfo(s, now));
+  }
+
+  getSessionInfo(sessionId: string, scope: ActorTenantScope): SessionInfoDto | undefined {
     const s = this.sessions.get(sessionId);
-    if (!s) return undefined;
+    if (!s || !this.sessionMatchesScope(s, scope)) return undefined;
+    return this.toSessionInfo(s);
+  }
+
+  private scopeFromOptions(options: AgentSessionOptions): ActorTenantScope {
+    if (!options.userId) {
+      throw new ForbiddenException('Session owner scope is required');
+    }
     return {
-      id: s.id,
+      userId: options.userId,
-      provider: s.provider,
+      tenantId: this.tenantIdFor(options.userId, options.tenantId) ?? options.userId,
-      modelId: s.modelId,
+    };
-      ...(s.agentName ? { agentName: s.agentName } : {}),
+  }
-      createdAt: new Date(s.createdAt).toISOString(),
+
-      promptCount: s.promptCount,
+  private tenantIdFor(
-      channels: Array.from(s.channels),
+    userId: string | undefined,
-      durationMs: Date.now() - s.createdAt,
+    tenantId: string | undefined,
-      metrics: { ...s.metrics },
+  ): string | undefined {
+    return tenantId ?? userId;
+  }
+
+  private sessionMatchesScope(session: AgentSession, scope: ActorTenantScope): boolean {
+    return (
+      session.userId === scope.userId && (session.tenantId ?? session.userId) === scope.tenantId
+    );
+  }
+
+  private assertSessionScope(session: AgentSession, scope: ActorTenantScope): void {
+    if (!this.sessionMatchesScope(session, scope)) {
+      throw new ForbiddenException('Session does not belong to the current owner/tenant scope');
+    }
+  }
+
+  private toSessionInfo(session: AgentSession, now = Date.now()): SessionInfoDto {
+    return {
+      id: session.id,
+      provider: session.provider,
+      modelId: session.modelId,
+      ...(session.agentName ? { agentName: session.agentName } : {}),
+      createdAt: new Date(session.createdAt).toISOString(),
+      promptCount: session.promptCount,
+      channels: Array.from(session.channels),
+      durationMs: now - session.createdAt,
+      metrics: { ...session.metrics },
     };
   }
 
@@ -553,9 +606,10 @@ export class AgentService implements OnModuleDestroy {
    * not reconstructed — the model is used on the next createSession call for
    * the same conversationId when the session is torn down or a new one is created.
    */
-  updateSessionModel(sessionId: string, modelId: string): void {
+  updateSessionModel(sessionId: string, modelId: string, scope: ActorTenantScope): void {
     const session = this.sessions.get(sessionId);
     if (!session) return;
+    this.assertSessionScope(session, scope);
     const prev = session.modelId;
     session.modelId = modelId;
     this.recordModelSwitch(sessionId);
@@ -572,48 +626,51 @@ export class AgentService implements OnModuleDestroy {
     sessionId: string,
     agentConfigId: string,
     agentName: string,
+    scope: ActorTenantScope,
     modelId?: string,
   ): void {
     const session = this.sessions.get(sessionId);
     if (!session) return;
+    this.assertSessionScope(session, scope);
     session.agentConfigId = agentConfigId;
     session.agentName = agentName;
     if (modelId) {
-      this.updateSessionModel(sessionId, modelId);
+      this.updateSessionModel(sessionId, modelId, scope);
     }
     this.logger.log(
       `Session ${sessionId}: agent switched to "${agentName}" (${agentConfigId}) (M5-003)`,
     );
   }
 
-  addChannel(sessionId: string, channel: string): void {
+  addChannel(sessionId: string, channel: string, scope: ActorTenantScope): void {
     const session = this.sessions.get(sessionId);
-    if (session) {
+    if (!session) return;
-      session.channels.add(channel);
+    this.assertSessionScope(session, scope);
-    }
+    session.channels.add(channel);
   }
 
-  removeChannel(sessionId: string, channel: string): void {
+  removeChannel(sessionId: string, channel: string, scope: ActorTenantScope): void {
     const session = this.sessions.get(sessionId);
-    if (session) {
+    if (!session) return;
-      session.channels.delete(channel);
+    this.assertSessionScope(session, scope);
-    }
+    session.channels.delete(channel);
   }
 
-  async prompt(sessionId: string, message: string): Promise<void> {
+  async prompt(sessionId: string, message: string, scope: ActorTenantScope): Promise<void> {
     const session = this.sessions.get(sessionId);
     if (!session) {
       throw new Error(`No agent session found: ${sessionId}`);
     }
+    this.assertSessionScope(session, scope);
     session.promptCount += 1;
 
     // Prepend session-scoped system override if present (renew TTL on each turn)
     let effectiveMessage = message;
     if (this.systemOverride) {
-      const override = await this.systemOverride.get(sessionId);
+      const override = await this.systemOverride.get(sessionId, scope);
       if (override) {
         effectiveMessage = `[System Override]\n${override}\n\n${message}`;
-        await this.systemOverride.renew(sessionId);
+        await this.systemOverride.renew(sessionId, scope);
         this.logger.debug(`Applied system override for session ${sessionId}`);
       }
     }
@@ -629,16 +686,28 @@ export class AgentService implements OnModuleDestroy {
     }
   }
 
-  onEvent(sessionId: string, listener: (event: AgentSessionEvent) => void): () => void {
+  onEvent(
+    sessionId: string,
+    listener: (event: AgentSessionEvent) => void,
+    scope: ActorTenantScope,
+  ): () => void {
     const session = this.sessions.get(sessionId);
     if (!session) {
       throw new Error(`No agent session found: ${sessionId}`);
     }
+    this.assertSessionScope(session, scope);
     session.listeners.add(listener);
     return () => session.listeners.delete(listener);
   }
 
-  async destroySession(sessionId: string): Promise<void> {
+  async destroySession(sessionId: string, scope: ActorTenantScope): Promise<void> {
+    const session = this.sessions.get(sessionId);
+    if (!session) return;
+    this.assertSessionScope(session, scope);
+    await this.destroySessionForSystem(sessionId);
+  }
+
+  private async destroySessionForSystem(sessionId: string): Promise<void> {
     const session = this.sessions.get(sessionId);
     if (!session) return;
     this.logger.log(`Destroying agent session ${sessionId}`);
@@ -667,7 +736,7 @@ export class AgentService implements OnModuleDestroy {
 
   async onModuleDestroy(): Promise<void> {
     this.logger.log('Shutting down all agent sessions');
-    const stops = Array.from(this.sessions.keys()).map((id) => this.destroySession(id));
+    const stops = Array.from(this.sessions.keys()).map((id) => this.destroySessionForSystem(id));
     const results = await Promise.allSettled(stops);
     for (const result of results) {
       if (result.status === 'rejected') {

apps/gateway/src/agent/provider-credentials.service.ts

@@ -1,62 +1,10 @@
 import { Inject, Injectable, Logger } from '@nestjs/common';
-import { createCipheriv, createDecipheriv, createHash, randomBytes } from 'node:crypto';
+import { seal, unseal } from '@mosaicstack/auth';
 import type { Db } from '@mosaicstack/db';
 import { providerCredentials, eq, and } from '@mosaicstack/db';
 import { DB } from '../database/database.module.js';
 import type { ProviderCredentialSummaryDto } from './provider-credentials.dto.js';
 
-const ALGORITHM = 'aes-256-gcm';
-const IV_LENGTH = 12; // 96-bit IV for GCM
-const TAG_LENGTH = 16; // 128-bit auth tag
-
-/**
- * Derive a 32-byte AES-256 key from BETTER_AUTH_SECRET using SHA-256.
- * The secret is assumed to be set in the environment.
- */
-function deriveEncryptionKey(): Buffer {
-  const secret = process.env['BETTER_AUTH_SECRET'];
-  if (!secret) {
-    throw new Error('BETTER_AUTH_SECRET is not set — cannot derive encryption key');
-  }
-  return createHash('sha256').update(secret).digest();
-}
-
-/**
- * Encrypt a plain-text value using AES-256-GCM.
- * Output format: base64(iv + authTag + ciphertext)
- */
-function encrypt(plaintext: string): string {
-  const key = deriveEncryptionKey();
-  const iv = randomBytes(IV_LENGTH);
-  const cipher = createCipheriv(ALGORITHM, key, iv);
-
-  const encrypted = Buffer.concat([cipher.update(plaintext, 'utf8'), cipher.final()]);
-  const authTag = cipher.getAuthTag();
-
-  // Combine iv (12) + authTag (16) + ciphertext and base64-encode
-  const combined = Buffer.concat([iv, authTag, encrypted]);
-  return combined.toString('base64');
-}
-
-/**
- * Decrypt a value encrypted by `encrypt()`.
- * Throws on authentication failure (tampered data).
- */
-function decrypt(encoded: string): string {
-  const key = deriveEncryptionKey();
-  const combined = Buffer.from(encoded, 'base64');
-
-  const iv = combined.subarray(0, IV_LENGTH);
-  const authTag = combined.subarray(IV_LENGTH, IV_LENGTH + TAG_LENGTH);
-  const ciphertext = combined.subarray(IV_LENGTH + TAG_LENGTH);
-
-  const decipher = createDecipheriv(ALGORITHM, key, iv);
-  decipher.setAuthTag(authTag);
-
-  const decrypted = Buffer.concat([decipher.update(ciphertext), decipher.final()]);
-  return decrypted.toString('utf8');
-}
-
 @Injectable()
 export class ProviderCredentialsService {
   private readonly logger = new Logger(ProviderCredentialsService.name);
@@ -74,7 +22,7 @@ export class ProviderCredentialsService {
     value: string,
     metadata?: Record<string, unknown>,
   ): Promise<void> {
-    const encryptedValue = encrypt(value);
+    const encryptedValue = seal(value);
 
     await this.db
       .insert(providerCredentials)
@@ -122,7 +70,7 @@ export class ProviderCredentialsService {
     }
 
     try {
-      return decrypt(row.encryptedValue);
+      return unseal(row.encryptedValue);
     } catch (err) {
       this.logger.error(
         `Failed to decrypt credential for user=${userId} provider=${provider}`,

apps/gateway/src/agent/runtime-provider-registry.service.ts

@@ -0,0 +1,404 @@
+import { ForbiddenException, Inject, Injectable, Logger, NotFoundException } from '@nestjs/common';
+import { AgentRuntimeProviderRegistry } from '@mosaicstack/agent';
+import type {
+  AgentRuntimeProvider,
+  RuntimeAttachHandle,
+  RuntimeAttachMode,
+  RuntimeCapability,
+  RuntimeCapabilitySet,
+  RuntimeHealth,
+  RuntimeMessage,
+  RuntimeScope,
+  RuntimeSession,
+  RuntimeSessionTree,
+  RuntimeStreamEvent,
+} from '@mosaicstack/types';
+import type { ActorTenantScope } from '../auth/session-scope.js';
+
+export const AGENT_RUNTIME_PROVIDER_REGISTRY = Symbol('AGENT_RUNTIME_PROVIDER_REGISTRY');
+export const RUNTIME_PROVIDER_AUDIT_SINK = Symbol('RUNTIME_PROVIDER_AUDIT_SINK');
+export const RUNTIME_APPROVAL_VERIFIER = Symbol('RUNTIME_APPROVAL_VERIFIER');
+
+export type RuntimeProviderOperation =
+  | RuntimeCapability
+  | 'runtime.capabilities'
+  | 'runtime.health';
+export type RuntimeProviderAuditOutcome = 'requested' | 'succeeded' | 'denied' | 'failed';
+
+/** Trusted server-side context only; it intentionally excludes client-provided identity fields. */
+export interface RuntimeProviderRequestContext {
+  actorScope: ActorTenantScope;
+  channelId: string;
+  correlationId: string;
+}
+
+/** Metadata-only audit record. Message bodies, idempotency keys, and approval refs are excluded. */
+export interface RuntimeAuditEvent {
+  providerId: string;
+  operation: RuntimeProviderOperation;
+  outcome: RuntimeProviderAuditOutcome;
+  actorId: string;
+  tenantId: string;
+  channelId: string;
+  correlationId: string;
+  resourceId?: string;
+}
+
+export interface RuntimeAuditSink {
+  record(event: RuntimeAuditEvent): Promise<void>;
+}
+
+/** Exact action shape that a durable approval implementation must consume once. */
+export interface RuntimeTerminationAction {
+  providerId: string;
+  sessionId: string;
+  actorId: string;
+  tenantId: string;
+  channelId: string;
+  correlationId: string;
+}
+
+export interface RuntimeApprovalVerifier {
+  consume(approvalRef: string, action: RuntimeTerminationAction): Promise<boolean>;
+}
+
+class RuntimeApprovalDeniedError extends Error {
+  constructor() {
+    super('Runtime termination approval denied');
+  }
+}
+
+/**
+ * The default denies all runtime termination until a durable, exact-action
+ * approval implementation is configured. This is safer than a permissive stub.
+ */
+@Injectable()
+export class DenyRuntimeApprovalVerifier implements RuntimeApprovalVerifier {
+  async consume(_approvalRef: string, _action: RuntimeTerminationAction): Promise<boolean> {
+    return false;
+  }
+}
+
+/**
+ * Temporary metadata-only audit sink. M1 observability can replace this token
+ * with a durable audit writer without changing provider call sites.
+ */
+@Injectable()
+export class RuntimeProviderAuditService implements RuntimeAuditSink {
+  private readonly logger = new Logger(RuntimeProviderAuditService.name);
+
+  async record(event: RuntimeAuditEvent): Promise<void> {
+    this.logger.log(JSON.stringify(event));
+  }
+}
+
+@Injectable()
+export class RuntimeProviderService {
+  private readonly logger = new Logger(RuntimeProviderService.name);
+
+  constructor(
+    @Inject(AGENT_RUNTIME_PROVIDER_REGISTRY)
+    private readonly registry: AgentRuntimeProviderRegistry,
+    @Inject(RUNTIME_PROVIDER_AUDIT_SINK)
+    private readonly audit: RuntimeAuditSink,
+    @Inject(RUNTIME_APPROVAL_VERIFIER)
+    private readonly approvals: RuntimeApprovalVerifier,
+  ) {}
+
+  async capabilities(
+    providerId: string,
+    context: RuntimeProviderRequestContext,
+  ): Promise<RuntimeCapabilitySet> {
+    return this.execute(
+      providerId,
+      'runtime.capabilities',
+      undefined,
+      undefined,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<RuntimeCapabilitySet> =>
+        provider.capabilities(scope),
+    );
+  }
+
+  async health(providerId: string, context: RuntimeProviderRequestContext): Promise<RuntimeHealth> {
+    return this.execute(
+      providerId,
+      'runtime.health',
+      undefined,
+      undefined,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<RuntimeHealth> =>
+        provider.health(scope),
+    );
+  }
+
+  async listSessions(
+    providerId: string,
+    context: RuntimeProviderRequestContext,
+  ): Promise<RuntimeSession[]> {
+    return this.execute(
+      providerId,
+      'session.list',
+      'session.list',
+      undefined,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<RuntimeSession[]> =>
+        provider.listSessions(scope),
+    );
+  }
+
+  async getSessionTree(
+    providerId: string,
+    context: RuntimeProviderRequestContext,
+  ): Promise<RuntimeSessionTree[]> {
+    return this.execute(
+      providerId,
+      'session.tree',
+      'session.tree',
+      undefined,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<RuntimeSessionTree[]> =>
+        provider.getSessionTree(scope),
+    );
+  }
+
+  streamSession(
+    providerId: string,
+    sessionId: string,
+    cursor: string | undefined,
+    context: RuntimeProviderRequestContext,
+  ): AsyncIterable<RuntimeStreamEvent> {
+    return this.stream(
+      providerId,
+      'session.stream',
+      'session.stream',
+      sessionId,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): AsyncIterable<RuntimeStreamEvent> =>
+        provider.streamSession(sessionId, cursor, scope),
+    );
+  }
+
+  async sendMessage(
+    providerId: string,
+    sessionId: string,
+    message: RuntimeMessage,
+    context: RuntimeProviderRequestContext,
+  ): Promise<void> {
+    await this.execute(
+      providerId,
+      'session.send',
+      'session.send',
+      sessionId,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<void> =>
+        provider.sendMessage(sessionId, message, scope),
+    );
+  }
+
+  async attach(
+    providerId: string,
+    sessionId: string,
+    mode: RuntimeAttachMode,
+    context: RuntimeProviderRequestContext,
+  ): Promise<RuntimeAttachHandle> {
+    return this.execute(
+      providerId,
+      'session.attach',
+      'session.attach',
+      sessionId,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<RuntimeAttachHandle> =>
+        provider.attach(sessionId, mode, scope),
+    );
+  }
+
+  async detach(
+    providerId: string,
+    attachmentId: string,
+    context: RuntimeProviderRequestContext,
+  ): Promise<void> {
+    await this.execute(
+      providerId,
+      'session.attach',
+      'session.attach',
+      attachmentId,
+      context,
+      (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<void> =>
+        provider.detach(attachmentId, scope),
+    );
+  }
+
+  async terminate(
+    providerId: string,
+    sessionId: string,
+    approvalRef: string,
+    context: RuntimeProviderRequestContext,
+  ): Promise<void> {
+    await this.execute(
+      providerId,
+      'session.terminate',
+      'session.terminate',
+      sessionId,
+      context,
+      async (provider: AgentRuntimeProvider, scope: RuntimeScope): Promise<void> => {
+        const approved = await this.approvals.consume(approvalRef, {
+          providerId,
+          sessionId,
+          actorId: scope.actorId,
+          tenantId: scope.tenantId,
+          channelId: scope.channelId,
+          correlationId: scope.correlationId,
+        });
+        if (!approved) {
+          throw new RuntimeApprovalDeniedError();
+        }
+        await provider.terminate(sessionId, approvalRef, scope);
+      },
+    );
+  }
+
+  private async execute<T>(
+    providerId: string,
+    operation: RuntimeProviderOperation,
+    requiredCapability: RuntimeCapability | undefined,
+    resourceId: string | undefined,
+    context: RuntimeProviderRequestContext,
+    invoke: (provider: AgentRuntimeProvider, scope: RuntimeScope) => Promise<T>,
+  ): Promise<T> {
+    const scope = this.deriveScope(context);
+    await this.record(providerId, operation, 'requested', scope, resourceId);
+    let invocationStarted = false;
+    try {
+      const provider = this.provider(providerId);
+      if (requiredCapability) {
+        await this.assertCapability(provider, requiredCapability, scope);
+      }
+      invocationStarted = true;
+      const result = await invoke(provider, scope);
+      await this.recordCompletion(providerId, operation, scope, resourceId);
+      return result;
+    } catch (error: unknown) {
+      if (invocationStarted && !(error instanceof RuntimeApprovalDeniedError)) {
+        await this.recordFailure(providerId, operation, scope, resourceId);
+      } else {
+        await this.record(providerId, operation, 'denied', scope, resourceId);
+      }
+      throw error;
+    }
+  }
+
+  private async *stream(
+    providerId: string,
+    operation: RuntimeProviderOperation,
+    requiredCapability: RuntimeCapability,
+    resourceId: string,
+    context: RuntimeProviderRequestContext,
+    invoke: (
+      provider: AgentRuntimeProvider,
+      scope: RuntimeScope,
+    ) => AsyncIterable<RuntimeStreamEvent>,
+  ): AsyncIterable<RuntimeStreamEvent> {
+    const scope = this.deriveScope(context);
+    await this.record(providerId, operation, 'requested', scope, resourceId);
+    let invocationStarted = false;
+    try {
+      const provider = this.provider(providerId);
+      await this.assertCapability(provider, requiredCapability, scope);
+      invocationStarted = true;
+      for await (const event of invoke(provider, scope)) {
+        yield event;
+      }
+      await this.recordCompletion(providerId, operation, scope, resourceId);
+    } catch (error: unknown) {
+      if (invocationStarted) {
+        await this.recordFailure(providerId, operation, scope, resourceId);
+      } else {
+        await this.record(providerId, operation, 'denied', scope, resourceId);
+      }
+      throw error;
+    }
+  }
+
+  private provider(providerId: string): AgentRuntimeProvider {
+    try {
+      return this.registry.require(providerId);
+    } catch (error: unknown) {
+      const message = error instanceof Error ? error.message : 'Runtime provider is not registered';
+      throw new NotFoundException(message);
+    }
+  }
+
+  private async assertCapability(
+    provider: AgentRuntimeProvider,
+    requiredCapability: RuntimeCapability,
+    scope: RuntimeScope,
+  ): Promise<void> {
+    const capabilities = await provider.capabilities(scope);
+    if (!capabilities.supported.includes(requiredCapability)) {
+      throw new ForbiddenException(`Runtime provider capability denied: ${requiredCapability}`);
+    }
+  }
+
+  private deriveScope(context: RuntimeProviderRequestContext): RuntimeScope {
+    const actorId = context.actorScope.userId.trim();
+    const tenantId = context.actorScope.tenantId.trim();
+    const channelId = context.channelId.trim();
+    const correlationId = context.correlationId.trim();
+    if (!actorId || !tenantId || !channelId || !correlationId) {
+      throw new ForbiddenException(
+        'Authenticated runtime actor scope and correlation are required',
+      );
+    }
+    return Object.freeze({ actorId, tenantId, channelId, correlationId });
+  }
+
+  private async recordFailure(
+    providerId: string,
+    operation: RuntimeProviderOperation,
+    scope: RuntimeScope,
+    resourceId: string | undefined,
+  ): Promise<void> {
+    try {
+      await this.record(providerId, operation, 'failed', scope, resourceId);
+    } catch {
+      this.logger.error(
+        `Runtime provider failure audit failed provider=${providerId} operation=${operation} correlation=${scope.correlationId}`,
+      );
+    }
+  }
+
+  private async recordCompletion(
+    providerId: string,
+    operation: RuntimeProviderOperation,
+    scope: RuntimeScope,
+    resourceId: string | undefined,
+  ): Promise<void> {
+    try {
+      await this.record(providerId, operation, 'succeeded', scope, resourceId);
+    } catch {
+      this.logger.error(
+        `Runtime provider completion audit failed provider=${providerId} operation=${operation} correlation=${scope.correlationId}`,
+      );
+    }
+  }
+
+  private async record(
+    providerId: string,
+    operation: RuntimeProviderOperation,
+    outcome: RuntimeProviderAuditOutcome,
+    scope: RuntimeScope,
+    resourceId: string | undefined,
+  ): Promise<void> {
+    await this.audit.record({
+      providerId,
+      operation,
+      outcome,
+      actorId: scope.actorId,
+      tenantId: scope.tenantId,
+      channelId: scope.channelId,
+      correlationId: scope.correlationId,
+      ...(resourceId ? { resourceId } : {}),
+    });
+  }
+}

apps/gateway/src/agent/sessions.controller.ts

@@ -10,6 +10,8 @@ import {
   UseGuards,
 } from '@nestjs/common';
 import { AuthGuard } from '../auth/auth.guard.js';
+import { CurrentUser } from '../auth/current-user.decorator.js';
+import { scopeFromUser, type AuthenticatedUserLike } from '../auth/session-scope.js';
 import { AgentService } from './agent.service.js';
 
 @Controller('api/sessions')
@@ -18,23 +20,24 @@ export class SessionsController {
   constructor(@Inject(AgentService) private readonly agentService: AgentService) {}
 
   @Get()
-  list() {
+  list(@CurrentUser() user: AuthenticatedUserLike) {
-    const sessions = this.agentService.listSessions();
+    const sessions = this.agentService.listSessions(scopeFromUser(user));
     return { sessions, total: sessions.length };
   }
 
   @Get(':id')
-  findOne(@Param('id') id: string) {
+  findOne(@Param('id') id: string, @CurrentUser() user: AuthenticatedUserLike) {
-    const info = this.agentService.getSessionInfo(id);
+    const info = this.agentService.getSessionInfo(id, scopeFromUser(user));
     if (!info) throw new NotFoundException('Session not found');
     return info;
   }
 
   @Delete(':id')
   @HttpCode(HttpStatus.NO_CONTENT)
-  async destroy(@Param('id') id: string) {
+  async destroy(@Param('id') id: string, @CurrentUser() user: AuthenticatedUserLike) {
-    const info = this.agentService.getSessionInfo(id);
+    const scope = scopeFromUser(user);
+    const info = this.agentService.getSessionInfo(id, scope);
     if (!info) throw new NotFoundException('Session not found');
-    await this.agentService.destroySession(id);
+    await this.agentService.destroySession(id, scope);
   }
 }

apps/gateway/src/app.module.ts

@@ -24,6 +24,7 @@ import { GCModule } from './gc/gc.module.js';
 import { ReloadModule } from './reload/reload.module.js';
 import { WorkspaceModule } from './workspace/workspace.module.js';
 import { QueueModule } from './queue/queue.module.js';
+import { FederationModule } from './federation/federation.module.js';
 import { ThrottlerGuard, ThrottlerModule } from '@nestjs/throttler';
 
 @Module({
@@ -52,6 +53,7 @@ import { ThrottlerGuard, ThrottlerModule } from '@nestjs/throttler';
     QueueModule,
     ReloadModule,
     WorkspaceModule,
+    FederationModule,
   ],
   controllers: [HealthController],
   providers: [

apps/gateway/src/auth/session-scope.ts

@@ -0,0 +1,24 @@
+export interface AuthenticatedUserLike {
+  id: string;
+  tenantId?: string | null;
+  teamId?: string | null;
+  organizationId?: string | null;
+  orgId?: string | null;
+}
+
+export interface ActorTenantScope {
+  userId: string;
+  tenantId: string;
+}
+
+/**
+ * Build the immutable server-derived scope used for Tess session operations.
+ * Current Mosaic auth is user-scoped; future org/team claims can populate one
+ * of the tenant fields without allowing clients to choose another tenant.
+ */
+export function scopeFromUser(user: AuthenticatedUserLike): ActorTenantScope {
+  return {
+    userId: user.id,
+    tenantId: user.tenantId ?? user.teamId ?? user.organizationId ?? user.orgId ?? user.id,
+  };
+}

apps/gateway/src/chat/__tests__/chat-security.test.ts

@@ -12,7 +12,8 @@ describe('Chat controller source hardening', () => {
     const source = readFileSync(resolve('src/chat/chat.controller.ts'), 'utf8');
 
     expect(source).toContain('@UseGuards(AuthGuard)');
-    expect(source).toContain('@CurrentUser() user: { id: string }');
+    expect(source).toContain('@CurrentUser() user: AuthenticatedUserLike');
+    expect(source).toContain('const scope = scopeFromUser(user);');
   });
 });
 

apps/gateway/src/chat/chat.controller.ts

@@ -3,8 +3,10 @@ import {
   Post,
   Body,
   Logger,
+  ForbiddenException,
   HttpException,
   HttpStatus,
+  NotFoundException,
   Inject,
   UseGuards,
 } from '@nestjs/common';
@@ -13,6 +15,7 @@ import { Throttle } from '@nestjs/throttler';
 import { AgentService } from '../agent/agent.service.js';
 import { AuthGuard } from '../auth/auth.guard.js';
 import { CurrentUser } from '../auth/current-user.decorator.js';
+import { scopeFromUser, type AuthenticatedUserLike } from '../auth/session-scope.js';
 import { v4 as uuid } from 'uuid';
 import { ChatRequestDto } from './chat.dto.js';
 
@@ -32,16 +35,23 @@ export class ChatController {
   @Throttle({ default: { limit: 10, ttl: 60_000 } })
   async chat(
     @Body() body: ChatRequestDto,
-    @CurrentUser() user: { id: string },
+    @CurrentUser() user: AuthenticatedUserLike,
   ): Promise<ChatResponse> {
     const conversationId = body.conversationId ?? uuid();
+    const scope = scopeFromUser(user);
 
     try {
-      let agentSession = this.agentService.getSession(conversationId);
+      let agentSession = this.agentService.getSession(conversationId, scope);
       if (!agentSession) {
-        agentSession = await this.agentService.createSession(conversationId);
+        agentSession = await this.agentService.createSession(conversationId, {
+          userId: scope.userId,
+          tenantId: scope.tenantId,
+        });
       }
     } catch (err) {
+      if (err instanceof ForbiddenException) {
+        throw new NotFoundException('Session not found');
+      }
       this.logger.error(
         `Session creation failed for conversation=${conversationId}`,
         err instanceof Error ? err.stack : String(err),
@@ -60,20 +70,27 @@ export class ChatController {
         reject(new Error('Agent response timed out'));
       }, 120_000);
 
-      const cleanup = this.agentService.onEvent(conversationId, (event: AgentSessionEvent) => {
+      const cleanup = this.agentService.onEvent(
-        if (event.type === 'message_update' && event.assistantMessageEvent.type === 'text_delta') {
+        conversationId,
-          responseText += event.assistantMessageEvent.delta;
+        (event: AgentSessionEvent) => {
-        }
+          if (
-        if (event.type === 'agent_end') {
+            event.type === 'message_update' &&
-          clearTimeout(timer);
+            event.assistantMessageEvent.type === 'text_delta'
-          cleanup();
+          ) {
-          resolve();
+            responseText += event.assistantMessageEvent.delta;
-        }
+          }
-      });
+          if (event.type === 'agent_end') {
+            clearTimeout(timer);
+            cleanup();
+            resolve();
+          }
+        },
+        scope,
+      );
     });
 
     try {
-      await this.agentService.prompt(conversationId, body.content);
+      await this.agentService.prompt(conversationId, body.content, scope);
       await done;
     } catch (err) {
       if (err instanceof HttpException) throw err;

apps/gateway/src/chat/chat.gateway-auth.ts

@@ -1,3 +1,4 @@
+import { timingSafeEqual } from 'node:crypto';
 import type { IncomingHttpHeaders } from 'node:http';
 import { fromNodeHeaders } from 'better-auth/node';
 
@@ -12,6 +13,19 @@ export interface SessionAuth {
   };
 }
 
+export function validateDiscordServiceToken(
+  candidate: unknown,
+  expected: string | undefined,
+): boolean {
+  if (typeof candidate !== 'string' || !expected) return false;
+  const candidateBuffer = Buffer.from(candidate);
+  const expectedBuffer = Buffer.from(expected);
+  return (
+    candidateBuffer.length === expectedBuffer.length &&
+    timingSafeEqual(candidateBuffer, expectedBuffer)
+  );
+}
+
 export async function validateSocketSession(
   headers: IncomingHttpHeaders,
   auth: SessionAuth,

apps/gateway/src/chat/chat.gateway-command-approval.spec.ts

@@ -0,0 +1,74 @@
+import { describe, expect, it, vi } from 'vitest';
+import type { SlashCommandPayload } from '@mosaicstack/types';
+import { ChatGateway } from './chat.gateway.js';
+
+const payload: SlashCommandPayload = {
+  command: 'gc',
+  conversationId: 'conversation-1',
+  approvalId: 'approval-1',
+};
+
+function buildGateway(commandExecutor: {
+  execute: ReturnType<typeof vi.fn>;
+  createApproval: ReturnType<typeof vi.fn>;
+}): ChatGateway {
+  return new ChatGateway(
+    {} as never,
+    {} as never,
+    {} as never,
+    {} as never,
+    commandExecutor as never,
+    {} as never,
+  );
+}
+
+describe('ChatGateway command approval ingress', () => {
+  it('passes the client approval ID through to command execution while deriving the actor server-side', async (): Promise<void> => {
+    const commandExecutor = {
+      execute: vi.fn().mockResolvedValue({ ...payload, success: true }),
+      createApproval: vi.fn(),
+    };
+    const gateway = buildGateway(commandExecutor);
+    const client = { data: { user: { id: 'admin-1' } }, emit: vi.fn() };
+
+    await gateway.handleCommandExecute(client as never, payload);
+
+    expect(commandExecutor.execute).toHaveBeenCalledWith(payload, {
+      userId: 'admin-1',
+      tenantId: 'admin-1',
+    });
+    expect(client.emit).toHaveBeenCalledWith(
+      'command:result',
+      expect.objectContaining({ success: true }),
+    );
+  });
+
+  it('issues a durable approval only for the authenticated actor', async (): Promise<void> => {
+    const commandExecutor = {
+      execute: vi.fn(),
+      createApproval: vi.fn().mockResolvedValue({
+        approvalId: 'approval-1',
+        expiresAt: '2026-07-12T00:05:00.000Z',
+      }),
+    };
+    const gateway = buildGateway(commandExecutor);
+    const client = { data: { user: { id: 'admin-1' } }, emit: vi.fn() };
+
+    await gateway.handleCommandApproval(client as never, {
+      command: 'gc',
+      conversationId: 'conversation-1',
+    });
+
+    expect(commandExecutor.createApproval).toHaveBeenCalledWith(
+      { command: 'gc', conversationId: 'conversation-1' },
+      { userId: 'admin-1', tenantId: 'admin-1' },
+    );
+    expect(client.emit).toHaveBeenCalledWith('command:approval', {
+      command: 'gc',
+      conversationId: 'conversation-1',
+      success: true,
+      approvalId: 'approval-1',
+      expiresAt: '2026-07-12T00:05:00.000Z',
+    });
+  });
+});

apps/gateway/src/chat/chat.gateway-redaction.spec.ts

@@ -0,0 +1,170 @@
+import { describe, expect, it, vi } from 'vitest';
+import { ChatGateway } from './chat.gateway.js';
+
+const CONVERSATION_ID = 'conversation-1';
+const CANARY = 'sk_canary12345678';
+
+type GatewayInternals = {
+  clientSessions: Map<string, unknown>;
+  relayEvent(client: unknown, conversationId: string, event: unknown): void;
+};
+
+function buildGateway() {
+  const brain = {
+    conversations: {
+      addMessage: vi.fn().mockResolvedValue(undefined),
+    },
+  };
+  const agentService = {
+    getSession: vi.fn().mockReturnValue(undefined),
+  };
+  const gateway = new ChatGateway(
+    agentService as never,
+    {} as never,
+    brain as never,
+    {} as never,
+    {} as never,
+    {} as never,
+  );
+
+  return { gateway: gateway as unknown as GatewayInternals, brain };
+}
+
+describe('ChatGateway redaction boundary', (): void => {
+  it('redacts a secret split across assistant deltas before egress and persistence', (): void => {
+    const { gateway } = buildGateway();
+    const client = {
+      connected: true,
+      id: 'client-1',
+      data: { user: { id: 'user-1' } },
+      emit: vi.fn(),
+    };
+    const session = {
+      conversationId: CONVERSATION_ID,
+      cleanup: vi.fn(),
+      assistantText: '',
+      toolCalls: [],
+      pendingToolCalls: new Map(),
+      scope: { userId: 'user-1', tenantId: 'tenant-1' },
+    };
+    gateway.clientSessions.set(client.id, session);
+
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: 'sk_canary' },
+    });
+
+    expect(JSON.stringify(client.emit.mock.calls)).not.toContain('sk_canary');
+
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: '12345678 ' },
+    });
+
+    expect(client.emit).toHaveBeenCalledWith('agent:text', {
+      conversationId: CONVERSATION_ID,
+      text: '[REDACTED_SECRET] ',
+    });
+    expect(session.assistantText).toBe(`${CANARY} `);
+    expect(JSON.stringify(client.emit.mock.calls)).not.toContain(CANARY);
+  });
+
+  it('retains a split secret label until its value can be redacted', (): void => {
+    const { gateway } = buildGateway();
+    const client = {
+      connected: true,
+      id: 'client-1',
+      data: { user: { id: 'user-1' } },
+      emit: vi.fn(),
+    };
+
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: 'token ' },
+    });
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: '=canaryvalue123 ' },
+    });
+
+    expect(client.emit).toHaveBeenCalledWith('agent:text', {
+      conversationId: CONVERSATION_ID,
+      text: '[REDACTED_SECRET] ',
+    });
+    expect(JSON.stringify(client.emit.mock.calls)).not.toContain('canaryvalue123');
+  });
+
+  it('holds a streamed private key until it can be redacted', (): void => {
+    const { gateway } = buildGateway();
+    const client = {
+      connected: true,
+      id: 'client-1',
+      data: { user: { id: 'user-1' } },
+      emit: vi.fn(),
+    };
+
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: '-----BEGIN PRIVATE KEY-----\ncanary' },
+    });
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: '\n-----END PRIVATE KEY-----' },
+    });
+
+    expect(client.emit).toHaveBeenCalledWith('agent:text', {
+      conversationId: CONVERSATION_ID,
+      text: '[REDACTED_SECRET]',
+    });
+    expect(JSON.stringify(client.emit.mock.calls)).not.toContain('canary');
+  });
+
+  it('drops an oversized unterminated stream fragment rather than retaining it', (): void => {
+    const { gateway } = buildGateway();
+    const client = {
+      connected: true,
+      id: 'client-1',
+      data: { user: { id: 'user-1' } },
+      emit: vi.fn(),
+    };
+
+    gateway.relayEvent(client, CONVERSATION_ID, {
+      type: 'message_update',
+      assistantMessageEvent: { type: 'text_delta', delta: 'x'.repeat(8_193) },
+    });
+
+    expect(client.emit).toHaveBeenCalledWith('agent:text', {
+      conversationId: CONVERSATION_ID,
+      text: '[REDACTED_STREAM_OVERFLOW]',
+    });
+  });
+
+  it('persists only redacted assistant content with classifications', (): void => {
+    const { gateway, brain } = buildGateway();
+    const client = {
+      connected: true,
+      id: 'client-1',
+      data: { user: { id: 'user-1' } },
+      emit: vi.fn(),
+    };
+    gateway.clientSessions.set(client.id, {
+      conversationId: CONVERSATION_ID,
+      cleanup: vi.fn(),
+      assistantText: CANARY,
+      toolCalls: [],
+      pendingToolCalls: new Map(),
+      scope: { userId: 'user-1', tenantId: 'tenant-1' },
+    });
+
+    gateway.relayEvent(client, CONVERSATION_ID, { type: 'agent_end' });
+
+    expect(brain.conversations.addMessage).toHaveBeenCalledWith(
+      expect.objectContaining({
+        content: '[REDACTED_SECRET]',
+        metadata: expect.objectContaining({ classifications: ['secret'] }),
+      }),
+      'user-1',
+    );
+    expect(JSON.stringify(brain.conversations.addMessage.mock.calls)).not.toContain(CANARY);
+  });
+});

apps/gateway/src/chat/chat.gateway.ts

@@ -11,10 +11,17 @@ import {
 } from '@nestjs/websockets';
 import { Server, Socket } from 'socket.io';
 import type { AgentSessionEvent } from '@mariozechner/pi-coding-agent';
+import {
+  verifyDiscordIngressEnvelope,
+  type DiscordIngressEnvelope,
+  type DiscordIngressPayload,
+} from '@mosaicstack/discord-plugin';
 import type { Auth } from '@mosaicstack/auth';
 import type { Brain } from '@mosaicstack/brain';
+import { redactSensitiveContent } from '@mosaicstack/log';
 import type {
   SetThinkingPayload,
+  SlashCommandApprovalResultPayload,
   SlashCommandPayload,
   SystemReloadPayload,
   RoutingDecisionInfo,
@@ -22,13 +29,19 @@ import type {
 } from '@mosaicstack/types';
 import { AgentService, type ConversationHistoryMessage } from '../agent/agent.service.js';
 import { AUTH } from '../auth/auth.tokens.js';
+import {
+  scopeFromUser,
+  type ActorTenantScope,
+  type AuthenticatedUserLike,
+} from '../auth/session-scope.js';
 import { BRAIN } from '../brain/brain.tokens.js';
 import { CommandRegistryService } from '../commands/command-registry.service.js';
 import { CommandExecutorService } from '../commands/command-executor.service.js';
 import { RoutingEngineService } from '../agent/routing/routing-engine.service.js';
 import { v4 as uuid } from 'uuid';
 import { ChatSocketMessageDto } from './chat.dto.js';
-import { validateSocketSession } from './chat.gateway-auth.js';
+import { validateDiscordServiceToken, validateSocketSession } from './chat.gateway-auth.js';
+import { DiscordReplayProtector } from '../plugin/discord-replay-protector.js';
 
 /** Per-client state tracking streaming accumulation for persistence. */
 interface ClientSession {
@@ -40,6 +53,8 @@ interface ClientSession {
   toolCalls: Array<{ toolCallId: string; toolName: string; args: unknown; isError: boolean }>;
   /** Tool calls in-flight (started but not ended yet). */
   pendingToolCalls: Map<string, { toolName: string; args: unknown }>;
+  /** Server-derived owner/tenant scope for this socket's conversation attachment. */
+  scope: ActorTenantScope;
   /** Last routing decision made for this session (M4-008) */
   lastRoutingDecision?: RoutingDecisionInfo;
 }
@@ -49,6 +64,38 @@ interface ClientSession {
  * Keyed by conversationId, value is the model name to use.
  */
 const modelOverrides = new Map<string, string>();
+const MAX_REDACTION_BUFFER_LENGTH = 8_192;
+
+function isDiscordIngressEnvelope(value: unknown): value is DiscordIngressEnvelope {
+  if (typeof value !== 'object' || value === null) return false;
+  const envelope = value as { payload?: unknown; signature?: unknown };
+  if (
+    typeof envelope.signature !== 'string' ||
+    typeof envelope.payload !== 'object' ||
+    envelope.payload === null
+  ) {
+    return false;
+  }
+  const payload = envelope.payload as Record<string, unknown>;
+  return [
+    payload['correlationId'],
+    payload['messageId'],
+    payload['guildId'],
+    payload['channelId'],
+    payload['userId'],
+    payload['conversationId'],
+    payload['content'],
+  ].every((field: unknown): boolean => typeof field === 'string');
+}
+
+function isChatSocketMessage(value: unknown): value is ChatSocketMessageDto {
+  if (typeof value !== 'object' || value === null) return false;
+  const payload = value as { content?: unknown; conversationId?: unknown };
+  return (
+    typeof payload.content === 'string' &&
+    (payload.conversationId === undefined || typeof payload.conversationId === 'string')
+  );
+}
 
 @WebSocketGateway({
   cors: {
@@ -62,6 +109,11 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
 
   private readonly logger = new Logger(ChatGateway.name);
   private readonly clientSessions = new Map<string, ClientSession>();
+  /** Raw stream fragments are kept in memory only until they are safe to redact and emit. */
+  private readonly textEgressBuffers = new Map<string, string>();
+  private readonly thinkingEgressBuffers = new Map<string, string>();
+  private readonly overflowedEgress = new Set<string>();
+  private readonly discordReplayProtector = new DiscordReplayProtector();
 
   constructor(
     @Inject(AgentService) private readonly agentService: AgentService,
@@ -77,6 +129,13 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
   }
 
   async handleConnection(client: Socket): Promise<void> {
+    const serviceToken = client.handshake.auth['discordServiceToken'];
+    if (validateDiscordServiceToken(serviceToken, process.env['DISCORD_SERVICE_TOKEN'])) {
+      client.data.discordService = true;
+      this.logger.log(`Authenticated Discord service connected: ${client.id}`);
+      return;
+    }
+
     const session = await validateSocketSession(client.handshake.headers, this.auth);
     if (!session) {
       this.logger.warn(`Rejected unauthenticated WebSocket client: ${client.id}`);
@@ -87,8 +146,6 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     client.data.user = session.user;
     client.data.session = session.session;
     this.logger.log(`Client connected: ${client.id}`);
-
-    // Broadcast command manifest to the newly connected client
     client.emit('commands:manifest', { manifest: this.commandRegistry.getManifest() });
   }
 
@@ -97,25 +154,84 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     const session = this.clientSessions.get(client.id);
     if (session) {
       session.cleanup();
-      this.agentService.removeChannel(session.conversationId, `websocket:${client.id}`);
+      this.agentService.removeChannel(
+        session.conversationId,
+        `websocket:${client.id}`,
+        session.scope,
+      );
       this.clientSessions.delete(client.id);
     }
+    this.textEgressBuffers.delete(client.id);
+    this.thinkingEgressBuffers.delete(client.id);
+    this.overflowedEgress.delete(this.egressKey(client, 'agent:text'));
+    this.overflowedEgress.delete(this.egressKey(client, 'agent:thinking'));
+  }
+
+  private getClientScope(client: Socket): ActorTenantScope | null {
+    const user = client.data.user as AuthenticatedUserLike | undefined;
+    if (!user?.id) return null;
+    return scopeFromUser(user);
+  }
+
+  private modelOverrideKey(conversationId: string, scope: ActorTenantScope): string {
+    return `${scope.tenantId}:${scope.userId}:${conversationId}`;
+  }
+
+  private scopesEqual(a: ActorTenantScope, b: ActorTenantScope): boolean {
+    return a.userId === b.userId && a.tenantId === b.tenantId;
   }
 
   @SubscribeMessage('message')
   async handleMessage(
     @ConnectedSocket() client: Socket,
-    @MessageBody() data: ChatSocketMessageDto,
+    @MessageBody() rawData: unknown,
   ): Promise<void> {
+    let discordIngress: DiscordIngressPayload | null = null;
+    let data: ChatSocketMessageDto;
+    if (client.data.discordService) {
+      if (!isDiscordIngressEnvelope(rawData)) {
+        this.logger.warn(`Rejected malformed Discord ingress from ${client.id}`);
+        return;
+      }
+      discordIngress = this.resolveDiscordIngress(client, rawData);
+      if (!discordIngress) return;
+      data = { conversationId: discordIngress.conversationId, content: discordIngress.content };
+    } else {
+      if (!isChatSocketMessage(rawData)) {
+        this.logger.warn(`Rejected malformed chat message from ${client.id}`);
+        return;
+      }
+      data = rawData;
+    }
     const conversationId = data.conversationId ?? uuid();
-    const userId = (client.data.user as { id: string } | undefined)?.id;
+    const discordServiceUserId = process.env['DISCORD_SERVICE_USER_ID'];
+    if (discordIngress && !discordServiceUserId) {
+      this.logger.warn(
+        `Rejected Discord ingress without configured service owner from ${client.id}`,
+      );
+      return;
+    }
+    const scope = discordIngress
+      ? {
+          userId: discordServiceUserId!,
+          tenantId: process.env['DISCORD_SERVICE_TENANT_ID'] ?? discordServiceUserId!,
+        }
+      : this.getClientScope(client);
+    if (!scope) {
+      client.emit('error', { conversationId, error: 'Authenticated user scope is required.' });
+      return;
+    }
+    const userId = scope.userId;
+    const correlationId = discordIngress?.correlationId;
 
-    this.logger.log(`Message from ${client.id} in conversation ${conversationId}`);
+    this.logger.log(
+      `Message from ${client.id} in conversation ${conversationId}${correlationId ? ` correlation=${correlationId}` : ''}`,
+    );
 
     // Ensure agent session exists for this conversation
     let sessionRoutingDecision: RoutingDecisionInfo | undefined;
     try {
-      let agentSession = this.agentService.getSession(conversationId);
+      let agentSession = this.agentService.getSession(conversationId, scope);
       if (!agentSession) {
         // When resuming an existing conversation, load prior messages to inject as context (M1-004)
         const conversationHistory = await this.loadConversationHistory(conversationId, userId);
@@ -135,7 +251,7 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
         let resolvedProvider = data.provider;
         let resolvedModelId = data.modelId;
 
-        const modelOverride = modelOverrides.get(conversationId);
+        const modelOverride = modelOverrides.get(this.modelOverrideKey(conversationId, scope));
         if (modelOverride) {
           // /model override bypasses routing engine (M4-007)
           resolvedModelId = modelOverride;
@@ -172,6 +288,7 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
           modelId: resolvedModelId,
           agentConfigId: data.agentId,
           userId,
+          tenantId: scope.tenantId,
           conversationHistory: conversationHistory.length > 0 ? conversationHistory : undefined,
         });
 
@@ -210,9 +327,17 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
           {
             conversationId,
             role: 'user',
-            content: data.content,
+            content: redactSensitiveContent(data.content).content,
             metadata: {
               timestamp: new Date().toISOString(),
+              ...(correlationId
+                ? {
+                    correlationId,
+                    discordMessageId: discordIngress?.messageId,
+                    discordUserId: discordIngress?.userId,
+                  }
+                : {}),
+              classifications: redactSensitiveContent(data.content).classifications,
             },
           },
           userId,
@@ -232,9 +357,13 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     }
 
     // Subscribe to agent events and relay to client
-    const cleanup = this.agentService.onEvent(conversationId, (event: AgentSessionEvent) => {
+    const cleanup = this.agentService.onEvent(
-      this.relayEvent(client, conversationId, event);
+      conversationId,
-    });
+      (event: AgentSessionEvent) => {
+        this.relayEvent(client, conversationId, event);
+      },
+      scope,
+    );
 
     // Preserve routing decision from the existing client session if we didn't get a new one
     const prevClientSession = this.clientSessions.get(client.id);
@@ -246,16 +375,17 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
       assistantText: '',
       toolCalls: [],
       pendingToolCalls: new Map(),
+      scope,
       lastRoutingDecision: routingDecisionToStore,
     });
 
     // Track channel connection
-    this.agentService.addChannel(conversationId, `websocket:${client.id}`);
+    this.agentService.addChannel(conversationId, `websocket:${client.id}`, scope);
 
     // Send session info so the client knows the model/provider (M4-008: include routing decision)
     // Include agentName when a named agent config is active (M5-001)
     {
-      const agentSession = this.agentService.getSession(conversationId);
+      const agentSession = this.agentService.getSession(conversationId, scope);
       if (agentSession) {
         const piSession = agentSession.piSession;
         client.emit('session:info', {
@@ -271,11 +401,21 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     }
 
     // Send acknowledgment
-    client.emit('message:ack', { conversationId, messageId: uuid() });
+    client.emit('message:ack', {
+      conversationId,
+      messageId: uuid(),
+      ...(correlationId
+        ? {
+            correlationId,
+            discordMessageId: discordIngress?.messageId,
+            discordUserId: discordIngress?.userId,
+          }
+        : {}),
+    });
 
     // Dispatch to agent
     try {
-      await this.agentService.prompt(conversationId, data.content);
+      await this.agentService.prompt(conversationId, data.content, scope);
     } catch (err) {
       this.logger.error(
         `Agent prompt failed for client=${client.id}, conversation=${conversationId}`,
@@ -293,7 +433,16 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     @ConnectedSocket() client: Socket,
     @MessageBody() data: SetThinkingPayload,
   ): void {
-    const session = this.agentService.getSession(data.conversationId);
+    const scope = this.getClientScope(client);
+    if (!scope) {
+      client.emit('error', {
+        conversationId: data.conversationId,
+        error: 'Authenticated user scope is required.',
+      });
+      return;
+    }
+
+    const session = this.agentService.getSession(data.conversationId, scope);
     if (!session) {
       client.emit('error', {
         conversationId: data.conversationId,
@@ -334,7 +483,13 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     const conversationId = data.conversationId;
     this.logger.log(`Abort requested by ${client.id} for conversation ${conversationId}`);
 
-    const session = this.agentService.getSession(conversationId);
+    const scope = this.getClientScope(client);
+    if (!scope) {
+      client.emit('error', { conversationId, error: 'Authenticated user scope is required.' });
+      return;
+    }
+
+    const session = this.agentService.getSession(conversationId, scope);
     if (!session) {
       client.emit('error', {
         conversationId,
@@ -363,11 +518,45 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     @ConnectedSocket() client: Socket,
     @MessageBody() payload: SlashCommandPayload,
   ): Promise<void> {
-    const userId = (client.data.user as { id: string } | undefined)?.id ?? 'unknown';
+    const scope = this.getClientScope(client);
-    const result = await this.commandExecutor.execute(payload, userId);
+    if (!scope) {
+      client.emit('command:result', {
+        command: payload.command,
+        conversationId: payload.conversationId,
+        success: false,
+        message: 'Authenticated user scope is required.',
+      });
+      return;
+    }
+
+    const result = await this.commandExecutor.execute(payload, scope);
     client.emit('command:result', result);
   }
 
+  @SubscribeMessage('command:approve')
+  async handleCommandApproval(
+    @ConnectedSocket() client: Socket,
+    @MessageBody() payload: SlashCommandPayload,
+  ): Promise<void> {
+    const scope = this.getClientScope(client);
+    const approval = scope ? await this.commandExecutor.createApproval(payload, scope) : null;
+    const result: SlashCommandApprovalResultPayload = approval
+      ? {
+          command: payload.command,
+          conversationId: payload.conversationId,
+          success: true,
+          approvalId: approval.approvalId,
+          expiresAt: approval.expiresAt,
+        }
+      : {
+          command: payload.command,
+          conversationId: payload.conversationId,
+          success: false,
+          message: 'Not authorized to approve this command.',
+        };
+    client.emit('command:approval', result);
+  }
+
   broadcastReload(payload: SystemReloadPayload): void {
     this.server.emit('system:reload', payload);
     this.logger.log('Broadcasted system:reload to all connected clients');
@@ -380,18 +569,23 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
    * M5-005: Emits session:info to clients subscribed to this conversation when a model is set.
    * M5-007: Records a model switch in session metrics.
    */
-  setModelOverride(conversationId: string, modelName: string | null): void {
+  setModelOverride(
+    conversationId: string,
+    modelName: string | null,
+    scope: ActorTenantScope,
+  ): void {
+    const key = this.modelOverrideKey(conversationId, scope);
     if (modelName) {
-      modelOverrides.set(conversationId, modelName);
+      modelOverrides.set(key, modelName);
       this.logger.log(`Model override set: conversation=${conversationId} model="${modelName}"`);
 
       // M5-002: Update the live session's modelId so session:info reflects the new model immediately
-      this.agentService.updateSessionModel(conversationId, modelName);
+      this.agentService.updateSessionModel(conversationId, modelName, scope);
 
       // M5-005: Broadcast session:info to all clients subscribed to this conversation
-      this.broadcastSessionInfo(conversationId);
+      this.broadcastSessionInfo(conversationId, scope);
     } else {
-      modelOverrides.delete(conversationId);
+      modelOverrides.delete(key);
       this.logger.log(`Model override cleared: conversation=${conversationId}`);
     }
   }
@@ -399,8 +593,8 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
   /**
    * Return the active model override for a conversation, or undefined if none.
    */
-  getModelOverride(conversationId: string): string | undefined {
+  getModelOverride(conversationId: string, scope: ActorTenantScope): string | undefined {
-    return modelOverrides.get(conversationId);
+    return modelOverrides.get(this.modelOverrideKey(conversationId, scope));
   }
 
   /**
@@ -409,9 +603,10 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
    */
   broadcastSessionInfo(
     conversationId: string,
+    scope: ActorTenantScope,
     extra?: { agentName?: string; routingDecision?: RoutingDecisionInfo },
   ): void {
-    const agentSession = this.agentService.getSession(conversationId);
+    const agentSession = this.agentService.getSession(conversationId, scope);
     if (!agentSession) return;
 
     const piSession = agentSession.piSession;
@@ -428,7 +623,7 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
 
     // Emit to all clients currently subscribed to this conversation
     for (const [clientId, session] of this.clientSessions) {
-      if (session.conversationId === conversationId) {
+      if (session.conversationId === conversationId && this.scopesEqual(session.scope, scope)) {
         const socket = this.server.sockets.sockets.get(clientId);
         if (socket?.connected) {
           socket.emit('session:info', payload);
@@ -442,6 +637,39 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
    * Creates it if absent — safe to call concurrently since a duplicate insert
    * would fail on the PK constraint and be caught here.
    */
+  private resolveDiscordIngress(
+    client: Socket,
+    envelope: DiscordIngressEnvelope,
+  ): DiscordIngressPayload | null {
+    const payload = verifyDiscordIngressEnvelope(
+      envelope,
+      process.env['DISCORD_SERVICE_TOKEN'] ?? '',
+      {
+        guildIds: this.readDiscordAllowlist('DISCORD_ALLOWED_GUILD_IDS'),
+        channelIds: this.readDiscordAllowlist('DISCORD_ALLOWED_CHANNEL_IDS'),
+        userIds: this.readDiscordAllowlist('DISCORD_ALLOWED_USER_IDS'),
+      },
+    );
+    if (!payload) {
+      this.logger.warn(`Rejected invalid Discord ingress envelope from ${client.id}`);
+      return null;
+    }
+    if (!this.discordReplayProtector.claim(payload.messageId)) {
+      this.logger.warn(
+        `Rejected replayed Discord message=${payload.messageId} correlation=${payload.correlationId}`,
+      );
+      return null;
+    }
+    return payload;
+  }
+
+  private readDiscordAllowlist(name: string): string[] {
+    return (process.env[name] ?? '')
+      .split(',')
+      .map((id: string): string => id.trim())
+      .filter((id: string): boolean => id.length > 0);
+  }
+
   private async ensureConversation(conversationId: string, userId: string): Promise<void> {
     try {
       const existing = await this.brain.conversations.findById(conversationId, userId);
@@ -527,6 +755,127 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
     }
   }
 
+  private appendAndFlushRedactedEgress(
+    client: Socket,
+    conversationId: string,
+    eventName: 'agent:text' | 'agent:thinking',
+    buffers: Map<string, string>,
+    delta: string,
+  ): void {
+    const key = this.egressKey(client, eventName);
+    if (this.overflowedEgress.has(key)) return;
+
+    const buffered = `${buffers.get(client.id) ?? ''}${delta}`;
+    if (buffered.length > MAX_REDACTION_BUFFER_LENGTH) {
+      buffers.delete(client.id);
+      this.overflowedEgress.add(key);
+      client.emit(eventName, { conversationId, text: '[REDACTED_STREAM_OVERFLOW]' });
+      return;
+    }
+
+    buffers.set(client.id, buffered);
+    this.flushRedactedEgress(client, conversationId, eventName, buffers, false);
+  }
+
+  /**
+   * Holds any suffix that could become a secret, email, or phone number after a
+   * later stream chunk. This avoids relying on downstream redaction after data
+   * has already reached the socket.
+   */
+  private flushRedactedEgress(
+    client: Socket,
+    conversationId: string,
+    eventName: 'agent:text' | 'agent:thinking',
+    buffers: Map<string, string>,
+    final: boolean,
+  ): void {
+    const key = this.egressKey(client, eventName);
+    if (this.overflowedEgress.has(key)) {
+      if (final) this.overflowedEgress.delete(key);
+      return;
+    }
+
+    const buffered = buffers.get(client.id) ?? '';
+    const releaseLength = final ? buffered.length : this.safeRedactionPrefixLength(buffered);
+    const released = buffered.slice(0, releaseLength);
+    const pending = buffered.slice(releaseLength);
+
+    if (pending) {
+      buffers.set(client.id, pending);
+    } else {
+      buffers.delete(client.id);
+    }
+
+    if (released) {
+      client.emit(eventName, {
+        conversationId,
+        text: redactSensitiveContent(released).content,
+      });
+    }
+  }
+
+  private safeRedactionPrefixLength(content: string): number {
+    let retainedFrom = content.length;
+
+    // Retain the current token because it may become a split secret or email.
+    const token = /(?:^|\s)(\S*)$/.exec(content);
+    if (token) {
+      const matched = token[0] ?? '';
+      const trailingToken = token[1] ?? '';
+      retainedFrom = token.index + matched.length - trailingToken.length;
+    }
+
+    // The secret classifier accepts whitespace around ':' and '=', so preserve
+    // a pending label until its value and delimiter are both complete.
+    const pendingSecretLabel =
+      /(?:^|[^A-Za-z0-9_])((?:api[_-]?key|token|password|secret|bearer|authorization)\s*)$/i.exec(
+        content,
+      );
+    if (pendingSecretLabel) {
+      const label = pendingSecretLabel[1] ?? '';
+      retainedFrom = Math.min(
+        retainedFrom,
+        pendingSecretLabel.index + pendingSecretLabel[0].length - label.length,
+      );
+    }
+
+    const secretLabel = /(?:api[_-]?key|token|password|secret|authorization)\s*[:=]\s*$/i.exec(
+      content,
+    );
+    if (secretLabel) {
+      retainedFrom = Math.min(retainedFrom, secretLabel.index);
+    }
+
+    // Phone numbers can contain whitespace and punctuation; preserve the full
+    // trailing numeric candidate until a non-phone character establishes a boundary.
+    const phone = /(?:^|[^A-Za-z0-9_])(\+?\d[\d(). -]*)$/.exec(content);
+    if (phone) {
+      const matched = phone[0] ?? '';
+      const trailingPhoneCandidate = phone[1] ?? '';
+      retainedFrom = Math.min(
+        retainedFrom,
+        phone.index + matched.length - trailingPhoneCandidate.length,
+      );
+    }
+
+    const privateKeyStart = content.lastIndexOf('-----BEGIN');
+    if (privateKeyStart >= 0) {
+      const privateKey = content.slice(privateKeyStart);
+      if (/-----END(?: [A-Z]+)* KEY-----/.test(privateKey)) {
+        // Release the complete block in one pass so the full-block classifier can redact it.
+        retainedFrom = content.length;
+      } else {
+        retainedFrom = Math.min(retainedFrom, privateKeyStart);
+      }
+    }
+
+    return retainedFrom;
+  }
+
+  private egressKey(client: Socket, eventName: 'agent:text' | 'agent:thinking'): string {
+    return `${client.id}:${eventName}`;
+  }
+
   private relayEvent(client: Socket, conversationId: string, event: AgentSessionEvent): void {
     if (!client.connected) {
       this.logger.warn(
@@ -544,13 +893,20 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
           cs.toolCalls = [];
           cs.pendingToolCalls.clear();
         }
+        this.textEgressBuffers.set(client.id, '');
+        this.thinkingEgressBuffers.set(client.id, '');
+        this.overflowedEgress.delete(this.egressKey(client, 'agent:text'));
+        this.overflowedEgress.delete(this.egressKey(client, 'agent:thinking'));
         client.emit('agent:start', { conversationId });
         break;
       }
 
       case 'agent_end': {
         // Gather usage stats from the Pi session
-        const agentSession = this.agentService.getSession(conversationId);
+        const activeClientSession = this.clientSessions.get(client.id);
+        const agentSession = activeClientSession
+          ? this.agentService.getSession(conversationId, activeClientSession.scope)
+          : undefined;
         const piSession = agentSession?.piSession;
         const stats = piSession?.getSessionStats();
         const contextUsage = piSession?.getContextUsage();
@@ -569,6 +925,20 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
             }
           : undefined;
 
+        this.flushRedactedEgress(
+          client,
+          conversationId,
+          'agent:text',
+          this.textEgressBuffers,
+          true,
+        );
+        this.flushRedactedEgress(
+          client,
+          conversationId,
+          'agent:thinking',
+          this.thinkingEgressBuffers,
+          true,
+        );
         client.emit('agent:end', {
           conversationId,
           usage: usagePayload,
@@ -611,8 +981,11 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
               {
                 conversationId,
                 role: 'assistant',
-                content: cs.assistantText,
+                content: redactSensitiveContent(cs.assistantText).content,
-                metadata,
+                metadata: {
+                  ...metadata,
+                  classifications: redactSensitiveContent(cs.assistantText).classifications,
+                },
               },
               userId,
             )
@@ -634,20 +1007,26 @@ export class ChatGateway implements OnGatewayInit, OnGatewayConnection, OnGatewa
       case 'message_update': {
         const assistantEvent = event.assistantMessageEvent;
         if (assistantEvent.type === 'text_delta') {
-          // Accumulate assistant text for persistence
+          // Keep raw stream material in memory only; persist and emit only redacted text.
           const cs = this.clientSessions.get(client.id);
           if (cs) {
             cs.assistantText += assistantEvent.delta;
           }
-          client.emit('agent:text', {
+          this.appendAndFlushRedactedEgress(
+            client,
             conversationId,
-            text: assistantEvent.delta,
+            'agent:text',
-          });
+            this.textEgressBuffers,
+            assistantEvent.delta,
+          );
         } else if (assistantEvent.type === 'thinking_delta') {
-          client.emit('agent:thinking', {
+          this.appendAndFlushRedactedEgress(
+            client,
             conversationId,
-            text: assistantEvent.delta,
+            'agent:thinking',
-          });
+            this.thinkingEgressBuffers,
+            assistantEvent.delta,
+          );
         }
         break;
       }

apps/gateway/src/commands/command-authorization.service.spec.ts

@@ -0,0 +1,61 @@
+import { describe, expect, it } from 'vitest';
+import type { CommandDef, SlashCommandPayload } from '@mosaicstack/types';
+import { CommandAuthorizationService } from './command-authorization.service.js';
+
+const adminCommand: CommandDef = {
+  name: 'gc',
+  description: 'GC',
+  aliases: [],
+  scope: 'admin',
+  execution: 'socket',
+  available: true,
+};
+const payload: SlashCommandPayload = { command: 'gc', conversationId: 'conversation-1' };
+
+function createService(role: string): CommandAuthorizationService {
+  const entries = new Map<string, string>();
+  const db = {
+    select: () => ({ from: () => ({ where: () => ({ limit: async () => [{ role }] }) }) }),
+  };
+  const redis = {
+    get: async (key: string) => entries.get(key) ?? null,
+    set: async (key: string, value: string) => {
+      entries.set(key, value);
+    },
+    del: async (key: string) => Number(entries.delete(key)),
+  };
+  return new CommandAuthorizationService(db as never, redis);
+}
+
+describe('CommandAuthorizationService', () => {
+  it('consumes one exact actor-bound approval once', async (): Promise<void> => {
+    const service = createService('admin');
+    const approval = await service.createApproval(adminCommand, payload, 'admin-1');
+    expect(approval).not.toBeNull();
+    expect(
+      (await service.authorize(adminCommand, payload, 'admin-1', approval!.approvalId)).allowed,
+    ).toBe(true);
+    expect(
+      (await service.authorize(adminCommand, payload, 'admin-1', approval!.approvalId)).allowed,
+    ).toBe(false);
+  });
+
+  it('rejects an approval when the structured action is mutated', async (): Promise<void> => {
+    const service = createService('admin');
+    const approval = await service.createApproval(adminCommand, payload, 'admin-1');
+    const mutated = { ...payload, conversationId: 'other-conversation' };
+    expect(approval).not.toBeNull();
+    expect(
+      (await service.authorize(adminCommand, mutated, 'admin-1', approval!.approvalId)).allowed,
+    ).toBe(false);
+  });
+
+  it('denies an admin command to a member before approval is considered', async (): Promise<void> => {
+    const service = createService('member');
+    const approval = await service.createApproval(adminCommand, payload, 'member-1');
+    expect(approval).toBeNull();
+    expect(
+      (await service.authorize(adminCommand, payload, 'member-1', 'forged-approval-id')).allowed,
+    ).toBe(false);
+  });
+});

apps/gateway/src/commands/command-authorization.service.ts

@@ -0,0 +1,138 @@
+import { createHash, randomUUID } from 'node:crypto';
+import { Inject, Injectable } from '@nestjs/common';
+import { eq, users as usersTable, type Db } from '@mosaicstack/db';
+import type { CommandDef, SlashCommandPayload } from '@mosaicstack/types';
+import { DB } from '../database/database.module.js';
+import { COMMANDS_REDIS } from './commands.tokens.js';
+
+export type CommandRole = 'admin' | 'member' | 'viewer';
+
+export interface CommandApproval {
+  approvalId: string;
+  actionDigest: string;
+  actorId: string;
+  command: string;
+  expiresAt: string;
+}
+
+export interface CommandAuthorizationResult {
+  allowed: boolean;
+  reason?: string;
+}
+
+@Injectable()
+export class CommandAuthorizationService {
+  constructor(
+    @Inject(DB) private readonly db: Db,
+    @Inject(COMMANDS_REDIS)
+    private readonly redis: {
+      get(key: string): Promise<string | null>;
+      set(key: string, value: string, ...args: string[]): Promise<unknown>;
+      del(key: string): Promise<number>;
+    },
+  ) {}
+
+  async authorize(
+    command: CommandDef,
+    payload: SlashCommandPayload,
+    actorId: string,
+    approvalId?: string,
+  ): Promise<CommandAuthorizationResult> {
+    const role = await this.resolveRole(actorId);
+    if (!role || !this.hasScope(role, command.scope)) {
+      return { allowed: false, reason: 'not authorized for this command scope' };
+    }
+    if (command.scope !== 'admin') return { allowed: true };
+    if (!approvalId) return { allowed: false, reason: 'durable approval is required' };
+    const actionDigest = this.actionDigest(command.name, payload);
+    const approved = await this.consumeApproval(approvalId, actorId, actionDigest);
+    return approved
+      ? { allowed: true }
+      : {
+          allowed: false,
+          reason: 'approval is invalid, expired, replayed, or does not match this action',
+        };
+  }
+
+  async createApproval(
+    command: CommandDef,
+    payload: SlashCommandPayload,
+    actorId: string,
+  ): Promise<CommandApproval | null> {
+    const role = await this.resolveRole(actorId);
+    if (!role || command.scope !== 'admin' || !this.hasScope(role, command.scope)) return null;
+
+    const approvalId = randomUUID();
+    const expiresAt = new Date(Date.now() + 5 * 60_000).toISOString();
+    const approval: CommandApproval = {
+      approvalId,
+      actionDigest: this.actionDigest(command.name, payload),
+      actorId,
+      command: command.name,
+      expiresAt,
+    };
+    await this.redis.set(this.key(approvalId), JSON.stringify(approval), 'EX', '300');
+    return approval;
+  }
+
+  private async resolveRole(actorId: string): Promise<CommandRole | null> {
+    const [user] = await this.db
+      .select({ role: usersTable.role })
+      .from(usersTable)
+      .where(eq(usersTable.id, actorId))
+      .limit(1);
+    const role = user?.role;
+    return role === 'admin' || role === 'member' || role === 'viewer' ? role : null;
+  }
+
+  private hasScope(role: CommandRole, scope: CommandDef['scope']): boolean {
+    if (role === 'admin') return true;
+    return role === 'member' && (scope === 'core' || scope === 'agent');
+  }
+
+  private async consumeApproval(
+    approvalId: string,
+    actorId: string,
+    actionDigest: string,
+  ): Promise<boolean> {
+    const key = this.key(approvalId);
+    const encoded = await this.redis.get(key);
+    if (!encoded) return false;
+    const parsed: unknown = JSON.parse(encoded);
+    if (
+      !this.isApproval(parsed) ||
+      parsed.actorId !== actorId ||
+      parsed.actionDigest !== actionDigest ||
+      Date.parse(parsed.expiresAt) <= Date.now()
+    )
+      return false;
+    return (await this.redis.del(key)) === 1;
+  }
+
+  private actionDigest(command: string, payload: SlashCommandPayload): string {
+    return createHash('sha256')
+      .update(
+        JSON.stringify({
+          command,
+          args: payload.args?.trim() ?? '',
+          conversationId: payload.conversationId,
+        }),
+      )
+      .digest('hex');
+  }
+
+  private isApproval(value: unknown): value is CommandApproval {
+    return (
+      typeof value === 'object' &&
+      value !== null &&
+      'approvalId' in value &&
+      'actionDigest' in value &&
+      'actorId' in value &&
+      'expiresAt' in value
+    );
+  }
+
+  private key(approvalId: string): string {
+    return `tess:command-approval:${approvalId}`;
+  }
+}

apps/gateway/src/commands/command-executor-p8012.spec.ts

@@ -89,6 +89,7 @@ function buildService(): CommandExecutorService {
 describe('CommandExecutorService — P8-012 commands', () => {
   let service: CommandExecutorService;
   const userId = 'user-123';
+  const userScope = { userId, tenantId: userId };
   const conversationId = 'conv-456';
 
   beforeEach(() => {
@@ -99,31 +100,26 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /provider login — missing provider name
   it('/provider login with no provider name returns usage error', async () => {
     const payload: SlashCommandPayload = { command: 'provider', args: 'login', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(false);
     expect(result.message).toContain('Usage: /provider login');
     expect(result.command).toBe('provider');
   });
 
-  // /provider login anthropic — success with URL containing poll token
+  // /provider login anthropic — no bearer token or auth URL reaches chat output
-  it('/provider login <name> returns success with URL and poll token', async () => {
+  it('/provider login <name> keeps its one-time token out of chat output', async () => {
     const payload: SlashCommandPayload = {
       command: 'provider',
       args: 'login anthropic',
       conversationId,
     };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('provider');
     expect(result.message).toContain('anthropic');
-    expect(result.message).toContain('http');
+    expect(result.message).not.toContain('http');
-    // data should contain loginUrl and pollToken
+    expect(result.message).not.toContain('token=');
-    expect(result.data).toBeDefined();
+    expect(result.data).toEqual({ provider: 'anthropic' });
-    const data = result.data as Record<string, unknown>;
-    expect(typeof data['loginUrl']).toBe('string');
-    expect(typeof data['pollToken']).toBe('string');
-    expect(data['loginUrl'] as string).toContain('anthropic');
-    expect(data['loginUrl'] as string).toContain(data['pollToken'] as string);
     // Verify Valkey was called
     expect(mockRedis.set).toHaveBeenCalledOnce();
     const [key, value, , ttl] = mockRedis.set.mock.calls[0] as [string, string, string, number];
@@ -138,7 +134,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /provider with no args — returns usage
   it('/provider with no args returns usage message', async () => {
     const payload: SlashCommandPayload = { command: 'provider', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('Usage: /provider');
   });
@@ -146,7 +142,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /provider list
   it('/provider list returns success', async () => {
     const payload: SlashCommandPayload = { command: 'provider', args: 'list', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('provider');
   });
@@ -154,7 +150,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /provider logout with no name — usage error
   it('/provider logout with no name returns error', async () => {
     const payload: SlashCommandPayload = { command: 'provider', args: 'logout', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(false);
     expect(result.message).toContain('Usage: /provider logout');
   });
@@ -166,7 +162,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
       args: 'unknown',
       conversationId,
     };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(false);
     expect(result.message).toContain('Unknown subcommand');
   });
@@ -174,7 +170,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /mission status
   it('/mission status returns stub message', async () => {
     const payload: SlashCommandPayload = { command: 'mission', args: 'status', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('mission');
     expect(result.message).toContain('Mission status');
@@ -183,7 +179,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /mission with no args
   it('/mission with no args returns status stub', async () => {
     const payload: SlashCommandPayload = { command: 'mission', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('Mission status');
   });
@@ -195,7 +191,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
       args: 'set my-mission-123',
       conversationId,
     };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('my-mission-123');
   });
@@ -203,7 +199,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /agent list
   it('/agent list returns stub message', async () => {
     const payload: SlashCommandPayload = { command: 'agent', args: 'list', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('agent');
     expect(result.message).toContain('agent');
@@ -212,7 +208,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /agent with no args
   it('/agent with no args returns usage', async () => {
     const payload: SlashCommandPayload = { command: 'agent', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('Usage: /agent');
   });
@@ -224,7 +220,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
       args: 'my-agent-id',
       conversationId,
     };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('my-agent-id');
   });
@@ -232,7 +228,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /prdy
   it('/prdy returns PRD wizard message', async () => {
     const payload: SlashCommandPayload = { command: 'prdy', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('prdy');
     expect(result.message).toContain('mosaic prdy');
@@ -241,7 +237,7 @@ describe('CommandExecutorService — P8-012 commands', () => {
   // /tools
   it('/tools returns tools stub message', async () => {
     const payload: SlashCommandPayload = { command: 'tools', conversationId };
-    const result = await service.execute(payload, userId);
+    const result = await service.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('tools');
     expect(result.message).toContain('tools');

apps/gateway/src/commands/command-executor-tess-security.spec.ts

@@ -0,0 +1,109 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import type { SlashCommandPayload } from '@mosaicstack/types';
+import { CommandAuthorizationService } from './command-authorization.service.js';
+import { CommandExecutorService } from './command-executor.service.js';
+
+const registry = {
+  getManifest: vi.fn(() => ({
+    version: 1,
+    commands: [
+      {
+        name: 'gc',
+        description: 'System-wide garbage collection',
+        aliases: [],
+        scope: 'admin' as const,
+        execution: 'socket' as const,
+        available: true,
+      },
+    ],
+    skills: [],
+  })),
+};
+
+const sessionGc = {
+  sweepOrphans: vi.fn().mockResolvedValue({ orphanedSessions: 1, totalCleaned: [], duration: 1 }),
+};
+
+const scope = (userId: string) => ({ userId, tenantId: 'tenant-1' });
+
+const authorization = {
+  authorize: vi.fn((_command: unknown, _payload: unknown, actorId: string) =>
+    Promise.resolve(
+      actorId === 'member-1'
+        ? { allowed: false, reason: 'durable approval is required' }
+        : { allowed: false, reason: 'not authorized for this command scope' },
+    ),
+  ),
+};
+
+function buildExecutor(authorizationService: unknown = authorization): CommandExecutorService {
+  return new CommandExecutorService(
+    registry as never,
+    { getSession: vi.fn() } as never,
+    { clear: vi.fn(), set: vi.fn() } as never,
+    sessionGc as never,
+    { set: vi.fn() } as never,
+    { agents: {} } as never,
+    null,
+    null,
+    null,
+    authorizationService as never,
+  );
+}
+
+function createDurableAuthorization(): CommandAuthorizationService {
+  const entries = new Map<string, string>();
+  const db = {
+    select: () => ({ from: () => ({ where: () => ({ limit: async () => [{ role: 'admin' }] }) }) }),
+  };
+  const redis = {
+    get: async (key: string) => entries.get(key) ?? null,
+    set: async (key: string, value: string) => {
+      entries.set(key, value);
+    },
+    del: async (key: string) => Number(entries.delete(key)),
+  };
+  return new CommandAuthorizationService(db as never, redis);
+}
+
+describe('TESS-M1-SEC-001 command authorization abuse cases', () => {
+  const payload: SlashCommandPayload = { command: 'gc', conversationId: 'conversation-1' };
+
+  beforeEach((): void => {
+    vi.clearAllMocks();
+  });
+
+  it('denies a forged admin identity and does not execute a system-wide command', async (): Promise<void> => {
+    const result = await buildExecutor().execute(payload, scope('admin-forged-by-client'));
+
+    expect(result.success).toBe(false);
+    expect(result.message).toContain('not authorized');
+    expect(sessionGc.sweepOrphans).not.toHaveBeenCalled();
+  });
+
+  it('denies a privileged command without a server-bound durable approval', async (): Promise<void> => {
+    const result = await buildExecutor().execute(payload, scope('member-1'));
+
+    expect(result.success).toBe(false);
+    expect(result.message).toContain('approval');
+    expect(sessionGc.sweepOrphans).not.toHaveBeenCalled();
+  });
+
+  it('executes an admin command only after a valid durable approval is issued and supplied', async (): Promise<void> => {
+    const executor = buildExecutor(createDurableAuthorization());
+
+    const adminScope = scope('admin-1');
+    const denied = await executor.execute(payload, adminScope);
+    const approval = await executor.createApproval(payload, adminScope);
+    const approved = await executor.execute(
+      { ...payload, approvalId: approval?.approvalId },
+      adminScope,
+    );
+
+    expect(denied.success).toBe(false);
+    expect(denied.message).toContain('approval');
+    expect(approval).not.toBeNull();
+    expect(approved.success).toBe(true);
+    expect(sessionGc.sweepOrphans).toHaveBeenCalledOnce();
+  });
+});

apps/gateway/src/commands/command-executor.service.ts

@@ -3,6 +3,7 @@ import type { QueueHandle } from '@mosaicstack/queue';
 import type { Brain } from '@mosaicstack/brain';
 import type { SlashCommandPayload, SlashCommandResultPayload } from '@mosaicstack/types';
 import { AgentService } from '../agent/agent.service.js';
+import type { ActorTenantScope } from '../auth/session-scope.js';
 import { ChatGateway } from '../chat/chat.gateway.js';
 import { SessionGCService } from '../gc/session-gc.service.js';
 import { SystemOverrideService } from '../preferences/system-override.service.js';
@@ -10,6 +11,7 @@ import { ReloadService } from '../reload/reload.service.js';
 import { McpClientService } from '../mcp-client/mcp-client.service.js';
 import { BRAIN } from '../brain/brain.tokens.js';
 import { COMMANDS_REDIS } from './commands.tokens.js';
+import { CommandAuthorizationService } from './command-authorization.service.js';
 import { CommandRegistryService } from './command-registry.service.js';
 
 @Injectable()
@@ -32,10 +34,17 @@ export class CommandExecutorService {
     @Optional()
     @Inject(McpClientService)
     private readonly mcpClient: McpClientService | null,
+    @Optional()
+    @Inject(CommandAuthorizationService)
+    private readonly authorization: CommandAuthorizationService | null = null,
   ) {}
 
-  async execute(payload: SlashCommandPayload, userId: string): Promise<SlashCommandResultPayload> {
+  async execute(
+    payload: SlashCommandPayload,
+    scope: ActorTenantScope,
+  ): Promise<SlashCommandResultPayload> {
     const { command, args, conversationId } = payload;
+    const userId = scope.userId;
 
     const def = this.registry.getManifest().commands.find((c) => c.name === command);
     if (!def) {
@@ -47,14 +56,24 @@ export class CommandExecutorService {
       };
     }
 
+    const authorization = await this.authorization?.authorize(
+      def,
+      payload,
+      userId,
+      payload.approvalId,
+    );
+    if (authorization && !authorization.allowed) {
+      return { command, conversationId, success: false, message: authorization.reason };
+    }
+
     try {
       switch (command) {
         case 'model':
-          return await this.handleModel(args ?? null, conversationId);
+          return await this.handleModel(args ?? null, conversationId, scope);
         case 'thinking':
           return await this.handleThinking(args ?? null, conversationId);
         case 'system':
-          return await this.handleSystem(args ?? null, conversationId);
+          return await this.handleSystem(args ?? null, conversationId, scope);
         case 'new':
           return {
             command,
@@ -94,7 +113,7 @@ export class CommandExecutorService {
           };
         }
         case 'agent':
-          return await this.handleAgent(args ?? null, conversationId, userId);
+          return await this.handleAgent(args ?? null, conversationId, scope);
         case 'provider':
           return await this.handleProvider(args ?? null, userId, conversationId);
         case 'mission':
@@ -143,13 +162,22 @@ export class CommandExecutorService {
     }
   }
 
+  async createApproval(payload: SlashCommandPayload, scope: ActorTenantScope) {
+    const def = this.registry
+      .getManifest()
+      .commands.find((command) => command.name === payload.command);
+    if (!def || !this.authorization) return null;
+    return this.authorization.createApproval(def, payload, scope.userId);
+  }
+
   private async handleModel(
     args: string | null,
     conversationId: string,
+    scope: ActorTenantScope,
   ): Promise<SlashCommandResultPayload> {
     if (!args || args.trim().length === 0) {
       // Show current override or usage hint
-      const currentOverride = this.chatGateway?.getModelOverride(conversationId);
+      const currentOverride = this.chatGateway?.getModelOverride(conversationId, scope);
       if (currentOverride) {
         return {
           command: 'model',
@@ -171,7 +199,7 @@ export class CommandExecutorService {
 
     // /model clear removes the override and re-enables automatic routing
     if (modelName === 'clear') {
-      this.chatGateway?.setModelOverride(conversationId, null);
+      this.chatGateway?.setModelOverride(conversationId, null, scope);
       return {
         command: 'model',
         conversationId,
@@ -181,9 +209,9 @@ export class CommandExecutorService {
     }
 
     // Set the sticky per-session override (M4-007)
-    this.chatGateway?.setModelOverride(conversationId, modelName);
+    this.chatGateway?.setModelOverride(conversationId, modelName, scope);
 
-    const session = this.agentService.getSession(conversationId);
+    const session = this.agentService.getSession(conversationId, scope);
     if (!session) {
       return {
         command: 'model',
@@ -224,10 +252,11 @@ export class CommandExecutorService {
   private async handleSystem(
     args: string | null,
     conversationId: string,
+    scope: ActorTenantScope,
   ): Promise<SlashCommandResultPayload> {
     if (!args || args.trim().length === 0) {
       // Clear the override when called with no args
-      await this.systemOverride.clear(conversationId);
+      await this.systemOverride.clear(conversationId, scope);
       return {
         command: 'system',
         conversationId,
@@ -236,7 +265,7 @@ export class CommandExecutorService {
       };
     }
 
-    await this.systemOverride.set(conversationId, args.trim());
+    await this.systemOverride.set(conversationId, args.trim(), scope);
     return {
       command: 'system',
       conversationId,
@@ -248,8 +277,9 @@ export class CommandExecutorService {
   private async handleAgent(
     args: string | null,
     conversationId: string,
-    userId: string,
+    scope: ActorTenantScope,
   ): Promise<SlashCommandResultPayload> {
+    const userId = scope.userId;
     if (!args) {
       return {
         command: 'agent',
@@ -338,11 +368,14 @@ export class CommandExecutorService {
         conversationId,
         agentConfig.id,
         agentConfig.name,
+        scope,
         agentConfig.model ?? undefined,
       );
 
       // Broadcast updated session:info so TUI TopBar reflects new agent/model
-      this.chatGateway?.broadcastSessionInfo(conversationId, { agentName: agentConfig.name });
+      this.chatGateway?.broadcastSessionInfo(conversationId, scope, {
+        agentName: agentConfig.name,
+      });
 
       this.logger.log(
         `Agent switched to "${agentConfig.name}" (${agentConfig.id}) for conversation ${conversationId} (M5-003)`,
@@ -403,22 +436,28 @@ export class CommandExecutorService {
           };
         }
         const pollToken = crypto.randomUUID();
-        const key = `mosaic:auth:poll:${pollToken}`;
+        const tokenDigest = await crypto.subtle.digest(
-        // Store pending state in Valkey (TTL 5 minutes)
+          'SHA-256',
+          new TextEncoder().encode(pollToken),
+        );
+        const tokenHash = Array.from(new Uint8Array(tokenDigest), (byte: number): string =>
+          byte.toString(16).padStart(2, '0'),
+        ).join('');
+        const key = `mosaic:auth:poll:${tokenHash}`;
+        // Persist only a short-lived token digest. The raw token is delivered only by
+        // the authenticated dashboard flow, never in chat output or command metadata.
         await this.redis.set(
           key,
           JSON.stringify({ status: 'pending', provider: providerName, userId }),
           'EX',
           300,
         );
-        // In production this would construct an OAuth URL
-        const loginUrl = `${process.env['MOSAIC_BASE_URL'] ?? 'http://localhost:3000'}/auth/provider/${providerName}?token=${pollToken}`;
         return {
           command: 'provider',
           success: true,
-          message: `Open this URL to authenticate with ${providerName}:\n${loginUrl}`,
+          message: `Provider login for ${providerName} is ready. Continue in the authenticated dashboard.`,
           conversationId,
-          data: { loginUrl, pollToken, provider: providerName },
+          data: { provider: providerName },
         };
       }
 

apps/gateway/src/commands/commands.integration.spec.ts

@@ -159,6 +159,7 @@ describe('CommandExecutorService — integration', () => {
   let registry: CommandRegistryService;
   let executor: CommandExecutorService;
   const userId = 'user-integ-001';
+  const userScope = { userId, tenantId: userId };
   const conversationId = 'conv-integ-001';
 
   beforeEach(() => {
@@ -170,7 +171,7 @@ describe('CommandExecutorService — integration', () => {
   // Unknown command returns error
   it('unknown command returns success:false with descriptive message', async () => {
     const payload: SlashCommandPayload = { command: 'nonexistent', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(result.success).toBe(false);
     expect(result.message).toContain('nonexistent');
     expect(result.command).toBe('nonexistent');
@@ -179,7 +180,7 @@ describe('CommandExecutorService — integration', () => {
   // /gc handler calls SessionGCService.sweepOrphans (admin-only, no userId arg)
   it('/gc calls SessionGCService.sweepOrphans without arguments', async () => {
     const payload: SlashCommandPayload = { command: 'gc', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(mockSessionGC.sweepOrphans).toHaveBeenCalledWith();
     expect(result.success).toBe(true);
     expect(result.message).toContain('GC sweep complete');
@@ -190,8 +191,8 @@ describe('CommandExecutorService — integration', () => {
   it('/system with text calls SystemOverrideService.set', async () => {
     const override = 'You are a helpful assistant.';
     const payload: SlashCommandPayload = { command: 'system', args: override, conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
-    expect(mockSystemOverride.set).toHaveBeenCalledWith(conversationId, override);
+    expect(mockSystemOverride.set).toHaveBeenCalledWith(conversationId, override, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('override set');
   });
@@ -199,8 +200,8 @@ describe('CommandExecutorService — integration', () => {
   // /system with no args clears the override
   it('/system with no args calls SystemOverrideService.clear', async () => {
     const payload: SlashCommandPayload = { command: 'system', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
-    expect(mockSystemOverride.clear).toHaveBeenCalledWith(conversationId);
+    expect(mockSystemOverride.clear).toHaveBeenCalledWith(conversationId, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('cleared');
   });
@@ -212,7 +213,7 @@ describe('CommandExecutorService — integration', () => {
       args: 'claude-3-opus',
       conversationId,
     };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('model');
     expect(result.message).toContain('claude-3-opus');
@@ -221,7 +222,7 @@ describe('CommandExecutorService — integration', () => {
   // /thinking with valid level returns success
   it('/thinking with valid level returns success', async () => {
     const payload: SlashCommandPayload = { command: 'thinking', args: 'high', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('high');
   });
@@ -229,7 +230,7 @@ describe('CommandExecutorService — integration', () => {
   // /thinking with invalid level returns usage message
   it('/thinking with invalid level returns usage message', async () => {
     const payload: SlashCommandPayload = { command: 'thinking', args: 'invalid', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.message).toContain('Usage:');
   });
@@ -237,7 +238,7 @@ describe('CommandExecutorService — integration', () => {
   // /new command returns success
   it('/new returns success', async () => {
     const payload: SlashCommandPayload = { command: 'new', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(result.success).toBe(true);
     expect(result.command).toBe('new');
   });
@@ -245,7 +246,7 @@ describe('CommandExecutorService — integration', () => {
   // /reload without reloadService returns failure
   it('/reload without ReloadService returns failure', async () => {
     const payload: SlashCommandPayload = { command: 'reload', conversationId };
-    const result = await executor.execute(payload, userId);
+    const result = await executor.execute(payload, userScope);
     expect(result.success).toBe(false);
     expect(result.message).toContain('ReloadService');
   });
@@ -255,7 +256,7 @@ describe('CommandExecutorService — integration', () => {
   for (const cmd of stubCommands) {
     it(`/${cmd} returns success (stub)`, async () => {
       const payload: SlashCommandPayload = { command: cmd, conversationId };
-      const result = await executor.execute(payload, userId);
+      const result = await executor.execute(payload, userScope);
       expect(result.success).toBe(true);
       expect(result.command).toBe(cmd);
     });

apps/gateway/src/commands/commands.module.ts

@@ -3,6 +3,7 @@ import { createQueue, type QueueHandle } from '@mosaicstack/queue';
 import { ChatModule } from '../chat/chat.module.js';
 import { GCModule } from '../gc/gc.module.js';
 import { ReloadModule } from '../reload/reload.module.js';
+import { CommandAuthorizationService } from './command-authorization.service.js';
 import { CommandExecutorService } from './command-executor.service.js';
 import { CommandRegistryService } from './command-registry.service.js';
 import { COMMANDS_REDIS } from './commands.tokens.js';
@@ -24,6 +25,7 @@ const COMMANDS_QUEUE_HANDLE = 'COMMANDS_QUEUE_HANDLE';
       inject: [COMMANDS_QUEUE_HANDLE],
     },
     CommandRegistryService,
+    CommandAuthorizationService,
     CommandExecutorService,
   ],
   exports: [CommandRegistryService, CommandExecutorService],

apps/gateway/src/database/database.module.ts

@@ -1,8 +1,21 @@
 import { mkdirSync } from 'node:fs';
 import { homedir } from 'node:os';
 import { join } from 'node:path';
-import { Global, Inject, Module, type OnApplicationShutdown } from '@nestjs/common';
+import {
-import { createDb, createPgliteDb, type Db, type DbHandle } from '@mosaicstack/db';
+  Global,
+  Inject,
+  Logger,
+  Module,
+  type OnApplicationShutdown,
+  type OnModuleInit,
+} from '@nestjs/common';
+import {
+  createDb,
+  createPgliteDb,
+  runPgliteMigrations,
+  type Db,
+  type DbHandle,
+} from '@mosaicstack/db';
 import { createStorageAdapter, type StorageAdapter } from '@mosaicstack/storage';
 import type { MosaicConfig } from '@mosaicstack/config';
 import { MOSAIC_CONFIG } from '../config/config.module.js';
@@ -39,12 +52,37 @@ export const STORAGE_ADAPTER = 'STORAGE_ADAPTER';
   ],
   exports: [DB, STORAGE_ADAPTER],
 })
-export class DatabaseModule implements OnApplicationShutdown {
+export class DatabaseModule implements OnApplicationShutdown, OnModuleInit {
+  private readonly logger = new Logger(DatabaseModule.name);
+
   constructor(
     @Inject(DB_HANDLE) private readonly handle: DbHandle,
     @Inject(STORAGE_ADAPTER) private readonly storageAdapter: StorageAdapter,
+    @Inject(MOSAIC_CONFIG) private readonly config: MosaicConfig,
   ) {}
 
+  // Migrations must complete before any module that injects DB starts serving
+  // requests. NestJS awaits onModuleInit before app.listen(), and modules that
+  // inject DB are initialized after this one — so all DB-dependent code sees a
+  // populated schema before the first HTTP request lands.
+  //
+  // Local (PGlite) tier: we run gateway-DB migrations explicitly here. The
+  // storage adapter writes to a separate PGlite directory and only manages its
+  // own KV tables, so we still call its migrate() afterwards.
+  //
+  // Postgres tier: PostgresAdapter.migrate() already calls runMigrations() on
+  // the same DATABASE_URL, so a single call covers both the gateway DB and
+  // the storage tables. We deliberately do NOT call runMigrations() here to
+  // avoid opening a second short-lived connection and doubling startup cost.
+  async onModuleInit(): Promise<void> {
+    if (this.config.tier === 'local') {
+      this.logger.log('Applying PGlite schema migrations...');
+      await runPgliteMigrations(this.handle);
+    }
+    this.logger.log(`Initializing storage adapter (${this.storageAdapter.name})...`);
+    await this.storageAdapter.migrate();
+  }
+
   async onApplicationShutdown(): Promise<void> {
     await Promise.all([this.handle.close(), this.storageAdapter.close()]);
   }

apps/gateway/src/federation/__tests__/enrollment.service.spec.ts

@@ -0,0 +1,401 @@
+/**
+ * Unit tests for EnrollmentService — federation enrollment token flow (FED-M2-07).
+ *
+ * Coverage:
+ *  createToken:
+ *   - inserts token row with correct grantId, peerId, and future expiresAt
+ *   - returns { token, expiresAt } with a 64-char hex token
+ *   - clamps ttlSeconds to 900
+ *
+ *  redeem — error paths:
+ *   - NotFoundException when token row not found
+ *   - GoneException when token already used (usedAt set)
+ *   - GoneException when token expired (expiresAt < now)
+ *   - GoneException when grant status is not pending
+ *
+ *  redeem — success path:
+ *   - atomically claims token BEFORE cert issuance (claim → issueCert → tx)
+ *   - calls CaService.issueCert with correct args
+ *   - activates grant + updates peer + writes audit log inside a transaction
+ *   - returns { certPem, certChainPem }
+ *
+ *  redeem — replay protection:
+ *   - GoneException when claim UPDATE returns empty array (concurrent request won)
+ */
+
+import 'reflect-metadata';
+import { describe, it, expect, vi, beforeEach, beforeAll } from 'vitest';
+import { GoneException, NotFoundException } from '@nestjs/common';
+import type { Db } from '@mosaicstack/db';
+import { EnrollmentService } from '../enrollment.service.js';
+import { makeSelfSignedCert } from './helpers/test-cert.js';
+
+// ---------------------------------------------------------------------------
+// Test constants
+// ---------------------------------------------------------------------------
+
+const GRANT_ID = 'g1111111-1111-1111-1111-111111111111';
+const PEER_ID = 'p2222222-2222-2222-2222-222222222222';
+const USER_ID = 'u3333333-3333-3333-3333-333333333333';
+const TOKEN = 'a'.repeat(64); // 64-char hex
+
+// Real self-signed EC P-256 cert — populated once in beforeAll.
+// Required because EnrollmentService.extractCertNotAfter calls new X509Certificate(certPem)
+// with strict parsing (PR #501 HIGH-2: no silent fallback).
+let REAL_CERT_PEM: string;
+
+const MOCK_CHAIN_PEM = () => REAL_CERT_PEM + REAL_CERT_PEM;
+const MOCK_SERIAL = 'ABCD1234';
+
+beforeAll(async () => {
+  REAL_CERT_PEM = await makeSelfSignedCert();
+});
+
+// ---------------------------------------------------------------------------
+// Factory helpers
+// ---------------------------------------------------------------------------
+
+function makeTokenRow(overrides: Partial<Record<string, unknown>> = {}) {
+  return {
+    token: TOKEN,
+    grantId: GRANT_ID,
+    peerId: PEER_ID,
+    expiresAt: new Date(Date.now() + 60_000), // 1 min from now
+    usedAt: null,
+    createdAt: new Date(),
+    ...overrides,
+  };
+}
+
+function makeGrant(overrides: Partial<Record<string, unknown>> = {}) {
+  return {
+    id: GRANT_ID,
+    peerId: PEER_ID,
+    subjectUserId: USER_ID,
+    scope: { resources: ['tasks'], excluded_resources: [], max_rows_per_query: 100 },
+    status: 'pending',
+    expiresAt: null,
+    createdAt: new Date(),
+    revokedAt: null,
+    revokedReason: null,
+    ...overrides,
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Mock DB builder
+// ---------------------------------------------------------------------------
+
+function makeDb({
+  tokenRows = [makeTokenRow()],
+  // claimedRows is returned by the .returning() on the token-claim UPDATE.
+  // Empty array = concurrent request won the race (GoneException).
+  claimedRows = [{ token: TOKEN }],
+}: {
+  tokenRows?: unknown[];
+  claimedRows?: unknown[];
+} = {}) {
+  // insert().values() — for createToken (outer db, not tx)
+  const insertValues = vi.fn().mockResolvedValue(undefined);
+  const insertMock = vi.fn().mockReturnValue({ values: insertValues });
+
+  // select().from().where().limit() — for fetching the token row
+  const limitSelect = vi.fn().mockResolvedValue(tokenRows);
+  const whereSelect = vi.fn().mockReturnValue({ limit: limitSelect });
+  const fromSelect = vi.fn().mockReturnValue({ where: whereSelect });
+  const selectMock = vi.fn().mockReturnValue({ from: fromSelect });
+
+  // update().set().where().returning() — for the atomic token claim (outer db)
+  const returningMock = vi.fn().mockResolvedValue(claimedRows);
+  const whereClaimUpdate = vi.fn().mockReturnValue({ returning: returningMock });
+  const setClaimMock = vi.fn().mockReturnValue({ where: whereClaimUpdate });
+  const claimUpdateMock = vi.fn().mockReturnValue({ set: setClaimMock });
+
+  // transaction(cb) — cb receives txMock; txMock has update + insert
+  //
+  // The tx mock must support two tx.update() call patterns (CRIT-2, PR #501):
+  //   1. Grant activation:  .update().set().where().returning() → resolves to [{ id }]
+  //   2. Peer update:       .update().set().where()             → resolves to undefined
+  //
+  // We achieve this by making txWhereUpdate return an object with BOTH a thenable
+  // interface (so `await tx.update().set().where()` works) AND a .returning() method.
+  const txGrantActivatedRow = { id: GRANT_ID };
+  const txReturningMock = vi.fn().mockResolvedValue([txGrantActivatedRow]);
+  const txWhereUpdate = vi.fn().mockReturnValue({
+    // .returning() for grant activation (first tx.update call)
+    returning: txReturningMock,
+    // thenables so `await tx.update().set().where()` also works for peer update
+    then: (resolve: (v: undefined) => void) => resolve(undefined),
+    catch: () => undefined,
+    finally: () => undefined,
+  });
+  const txSetMock = vi.fn().mockReturnValue({ where: txWhereUpdate });
+  const txUpdateMock = vi.fn().mockReturnValue({ set: txSetMock });
+  const txInsertValues = vi.fn().mockResolvedValue(undefined);
+  const txInsertMock = vi.fn().mockReturnValue({ values: txInsertValues });
+  const txMock = { update: txUpdateMock, insert: txInsertMock };
+  const transactionMock = vi
+    .fn()
+    .mockImplementation(async (cb: (tx: typeof txMock) => Promise<void>) => cb(txMock));
+
+  return {
+    insert: insertMock,
+    select: selectMock,
+    update: claimUpdateMock,
+    transaction: transactionMock,
+    _mocks: {
+      insertValues,
+      insertMock,
+      limitSelect,
+      whereSelect,
+      fromSelect,
+      selectMock,
+      returningMock,
+      whereClaimUpdate,
+      setClaimMock,
+      claimUpdateMock,
+      txInsertValues,
+      txInsertMock,
+      txWhereUpdate,
+      txReturningMock,
+      txSetMock,
+      txUpdateMock,
+      txMock,
+      transactionMock,
+    },
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Mock CaService
+// ---------------------------------------------------------------------------
+
+function makeCaService() {
+  return {
+    // REAL_CERT_PEM is populated by beforeAll — safe to reference via closure here
+    // because makeCaService() is only called after the suite's beforeAll runs.
+    issueCert: vi.fn().mockImplementation(async () => ({
+      certPem: REAL_CERT_PEM,
+      certChainPem: MOCK_CHAIN_PEM(),
+      serialNumber: MOCK_SERIAL,
+    })),
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Mock GrantsService
+// ---------------------------------------------------------------------------
+
+function makeGrantsService(grantOverrides: Partial<Record<string, unknown>> = {}) {
+  return {
+    getGrant: vi.fn().mockResolvedValue(makeGrant(grantOverrides)),
+    activateGrant: vi.fn().mockResolvedValue(makeGrant({ status: 'active' })),
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Helper: build service under test
+// ---------------------------------------------------------------------------
+
+function buildService({
+  db = makeDb(),
+  caService = makeCaService(),
+  grantsService = makeGrantsService(),
+}: {
+  db?: ReturnType<typeof makeDb>;
+  caService?: ReturnType<typeof makeCaService>;
+  grantsService?: ReturnType<typeof makeGrantsService>;
+} = {}) {
+  return new EnrollmentService(db as unknown as Db, caService as never, grantsService as never);
+}
+
+// ---------------------------------------------------------------------------
+// Tests: createToken
+// ---------------------------------------------------------------------------
+
+describe('EnrollmentService.createToken', () => {
+  it('inserts a token row and returns { token, expiresAt }', async () => {
+    const db = makeDb();
+    const service = buildService({ db });
+
+    const result = await service.createToken({
+      grantId: GRANT_ID,
+      peerId: PEER_ID,
+      ttlSeconds: 900,
+    });
+
+    expect(result.token).toHaveLength(64); // 32 bytes hex
+    expect(result.expiresAt).toBeDefined();
+    expect(new Date(result.expiresAt).getTime()).toBeGreaterThan(Date.now());
+    expect(db._mocks.insertValues).toHaveBeenCalledWith(
+      expect.objectContaining({ grantId: GRANT_ID, peerId: PEER_ID }),
+    );
+  });
+
+  it('clamps ttlSeconds to 900', async () => {
+    const db = makeDb();
+    const service = buildService({ db });
+
+    const before = Date.now();
+    const result = await service.createToken({
+      grantId: GRANT_ID,
+      peerId: PEER_ID,
+      ttlSeconds: 9999,
+    });
+    const after = Date.now();
+
+    const expiresMs = new Date(result.expiresAt).getTime();
+    // Should be at most 900s from now
+    expect(expiresMs - before).toBeLessThanOrEqual(900_000 + 100);
+    expect(expiresMs - after).toBeGreaterThanOrEqual(0);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// Tests: redeem — error paths
+// ---------------------------------------------------------------------------
+
+describe('EnrollmentService.redeem — error paths', () => {
+  it('throws NotFoundException when token row not found', async () => {
+    const db = makeDb({ tokenRows: [] });
+    const service = buildService({ db });
+
+    await expect(service.redeem(TOKEN, '---CSR---')).rejects.toBeInstanceOf(NotFoundException);
+  });
+
+  it('throws GoneException when usedAt is set (already redeemed)', async () => {
+    const db = makeDb({ tokenRows: [makeTokenRow({ usedAt: new Date(Date.now() - 1000) })] });
+    const service = buildService({ db });
+
+    await expect(service.redeem(TOKEN, '---CSR---')).rejects.toBeInstanceOf(GoneException);
+  });
+
+  it('throws GoneException when token has expired', async () => {
+    const db = makeDb({ tokenRows: [makeTokenRow({ expiresAt: new Date(Date.now() - 1000) })] });
+    const service = buildService({ db });
+
+    await expect(service.redeem(TOKEN, '---CSR---')).rejects.toBeInstanceOf(GoneException);
+  });
+
+  it('throws GoneException when grant status is not pending', async () => {
+    const db = makeDb();
+    const grantsService = makeGrantsService({ status: 'active' });
+    const service = buildService({ db, grantsService });
+
+    await expect(service.redeem(TOKEN, '---CSR---')).rejects.toBeInstanceOf(GoneException);
+  });
+
+  it('throws GoneException when token claim UPDATE returns empty array (concurrent replay)', async () => {
+    const db = makeDb({ claimedRows: [] });
+    const caService = makeCaService();
+    const grantsService = makeGrantsService();
+    const service = buildService({ db, caService, grantsService });
+
+    await expect(service.redeem(TOKEN, '---CSR---')).rejects.toBeInstanceOf(GoneException);
+  });
+
+  it('does NOT call issueCert when token claim fails (no double minting)', async () => {
+    const db = makeDb({ claimedRows: [] });
+    const caService = makeCaService();
+    const service = buildService({ db, caService });
+
+    await expect(service.redeem(TOKEN, '---CSR---')).rejects.toBeInstanceOf(GoneException);
+    expect(caService.issueCert).not.toHaveBeenCalled();
+  });
+});
+
+// ---------------------------------------------------------------------------
+// Tests: redeem — success path
+// ---------------------------------------------------------------------------
+
+describe('EnrollmentService.redeem — success path', () => {
+  let db: ReturnType<typeof makeDb>;
+  let caService: ReturnType<typeof makeCaService>;
+  let grantsService: ReturnType<typeof makeGrantsService>;
+  let service: EnrollmentService;
+
+  beforeEach(() => {
+    db = makeDb();
+    caService = makeCaService();
+    grantsService = makeGrantsService();
+    service = buildService({ db, caService, grantsService });
+  });
+
+  it('claims token BEFORE calling issueCert (prevents double minting)', async () => {
+    const callOrder: string[] = [];
+    db._mocks.returningMock.mockImplementation(async () => {
+      callOrder.push('claim');
+      return [{ token: TOKEN }];
+    });
+    caService.issueCert.mockImplementation(async () => {
+      callOrder.push('issueCert');
+      return { certPem: REAL_CERT_PEM, certChainPem: MOCK_CHAIN_PEM(), serialNumber: MOCK_SERIAL };
+    });
+
+    await service.redeem(TOKEN, '---CSR---');
+
+    expect(callOrder).toEqual(['claim', 'issueCert']);
+  });
+
+  it('calls CaService.issueCert with grantId, subjectUserId, csrPem, ttlSeconds=300', async () => {
+    await service.redeem(TOKEN, '---CSR---');
+
+    expect(caService.issueCert).toHaveBeenCalledWith(
+      expect.objectContaining({
+        grantId: GRANT_ID,
+        subjectUserId: USER_ID,
+        csrPem: '---CSR---',
+        ttlSeconds: 300,
+      }),
+    );
+  });
+
+  it('runs activate grant + peer update + audit inside a transaction', async () => {
+    await service.redeem(TOKEN, '---CSR---');
+
+    expect(db._mocks.transactionMock).toHaveBeenCalledOnce();
+    // tx.update called twice: activate grant + update peer
+    expect(db._mocks.txUpdateMock).toHaveBeenCalledTimes(2);
+    // tx.insert called once: audit log
+    expect(db._mocks.txInsertMock).toHaveBeenCalledOnce();
+  });
+
+  it('activates grant (sets status=active) inside the transaction', async () => {
+    await service.redeem(TOKEN, '---CSR---');
+
+    expect(db._mocks.txSetMock).toHaveBeenCalledWith(expect.objectContaining({ status: 'active' }));
+  });
+
+  it('updates the federationPeers row with certPem, certSerial, state=active inside the transaction', async () => {
+    await service.redeem(TOKEN, '---CSR---');
+
+    expect(db._mocks.txSetMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        certPem: REAL_CERT_PEM,
+        certSerial: MOCK_SERIAL,
+        state: 'active',
+      }),
+    );
+  });
+
+  it('inserts an audit log row inside the transaction', async () => {
+    await service.redeem(TOKEN, '---CSR---');
+
+    expect(db._mocks.txInsertValues).toHaveBeenCalledWith(
+      expect.objectContaining({
+        peerId: PEER_ID,
+        grantId: GRANT_ID,
+        verb: 'enrollment',
+      }),
+    );
+  });
+
+  it('returns { certPem, certChainPem } from CaService', async () => {
+    const result = await service.redeem(TOKEN, '---CSR---');
+
+    expect(result).toEqual({
+      certPem: REAL_CERT_PEM,
+      certChainPem: MOCK_CHAIN_PEM(),
+    });
+  });
+});

apps/gateway/src/federation/__tests__/federation.controller.spec.ts

@@ -0,0 +1,212 @@
+/**
+ * Unit tests for FederationController (FED-M2-08).
+ *
+ * Coverage:
+ *  - listGrants: delegates to GrantsService with query params
+ *  - createGrant: delegates to GrantsService, validates body
+ *  - generateToken: returns enrollmentUrl containing the token
+ *  - listPeers: returns DB rows
+ */
+
+import 'reflect-metadata';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { NotFoundException } from '@nestjs/common';
+import type { Db } from '@mosaicstack/db';
+import { FederationController } from '../federation.controller.js';
+import type { GrantsService } from '../grants.service.js';
+import type { EnrollmentService } from '../enrollment.service.js';
+
+// ---------------------------------------------------------------------------
+// Constants
+// ---------------------------------------------------------------------------
+
+const GRANT_ID = 'g1111111-1111-1111-1111-111111111111';
+const PEER_ID = 'p2222222-2222-2222-2222-222222222222';
+const USER_ID = 'u3333333-3333-3333-3333-333333333333';
+
+const MOCK_GRANT = {
+  id: GRANT_ID,
+  peerId: PEER_ID,
+  subjectUserId: USER_ID,
+  scope: { resources: ['tasks'], operations: ['list'] },
+  status: 'pending' as const,
+  expiresAt: null,
+  createdAt: new Date('2026-01-01T00:00:00Z'),
+  revokedAt: null,
+  revokedReason: null,
+};
+
+const MOCK_PEER = {
+  id: PEER_ID,
+  commonName: 'test-peer',
+  displayName: 'Test Peer',
+  certPem: '',
+  certSerial: 'pending',
+  certNotAfter: new Date(0),
+  clientKeyPem: null,
+  state: 'pending' as const,
+  endpointUrl: null,
+  createdAt: new Date('2026-01-01T00:00:00Z'),
+  updatedAt: new Date('2026-01-01T00:00:00Z'),
+};
+
+// ---------------------------------------------------------------------------
+// DB mock builder
+// ---------------------------------------------------------------------------
+
+function makeDbMock(rows: unknown[] = []) {
+  const orderBy = vi.fn().mockResolvedValue(rows);
+  const where = vi.fn().mockReturnValue({ orderBy });
+  const from = vi.fn().mockReturnValue({ where, orderBy });
+  const select = vi.fn().mockReturnValue({ from });
+
+  return {
+    select,
+    from,
+    where,
+    orderBy,
+    insert: vi.fn(),
+    update: vi.fn(),
+    delete: vi.fn(),
+  } as unknown as Db;
+}
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+describe('FederationController', () => {
+  let db: Db;
+  let grantsService: GrantsService;
+  let enrollmentService: EnrollmentService;
+  let controller: FederationController;
+
+  beforeEach(() => {
+    db = makeDbMock([MOCK_PEER]);
+
+    grantsService = {
+      createGrant: vi.fn().mockResolvedValue(MOCK_GRANT),
+      getGrant: vi.fn().mockResolvedValue(MOCK_GRANT),
+      listGrants: vi.fn().mockResolvedValue([MOCK_GRANT]),
+      revokeGrant: vi.fn().mockResolvedValue({ ...MOCK_GRANT, status: 'revoked' }),
+      activateGrant: vi.fn(),
+      expireGrant: vi.fn(),
+    } as unknown as GrantsService;
+
+    enrollmentService = {
+      createToken: vi.fn().mockResolvedValue({
+        token: 'abc123def456abc123def456abc123def456abc123def456abc123def456ab12',
+        expiresAt: '2026-01-01T00:15:00.000Z',
+      }),
+      redeem: vi.fn(),
+    } as unknown as EnrollmentService;
+
+    controller = new FederationController(db, grantsService, enrollmentService);
+  });
+
+  // ─── Grant management ──────────────────────────────────────────────────
+
+  describe('listGrants', () => {
+    it('delegates to GrantsService with provided query params', async () => {
+      const query = { peerId: PEER_ID, status: 'pending' as const };
+      const result = await controller.listGrants(query);
+
+      expect(grantsService.listGrants).toHaveBeenCalledWith(query);
+      expect(result).toEqual([MOCK_GRANT]);
+    });
+
+    it('delegates to GrantsService with empty filters', async () => {
+      const result = await controller.listGrants({});
+
+      expect(grantsService.listGrants).toHaveBeenCalledWith({});
+      expect(result).toEqual([MOCK_GRANT]);
+    });
+  });
+
+  describe('createGrant', () => {
+    it('delegates to GrantsService and returns created grant', async () => {
+      const body = {
+        peerId: PEER_ID,
+        subjectUserId: USER_ID,
+        scope: { resources: ['tasks'], operations: ['list'] },
+      };
+
+      const result = await controller.createGrant(body);
+
+      expect(grantsService.createGrant).toHaveBeenCalledWith(body);
+      expect(result).toEqual(MOCK_GRANT);
+    });
+  });
+
+  describe('getGrant', () => {
+    it('delegates to GrantsService with provided ID', async () => {
+      const result = await controller.getGrant(GRANT_ID);
+
+      expect(grantsService.getGrant).toHaveBeenCalledWith(GRANT_ID);
+      expect(result).toEqual(MOCK_GRANT);
+    });
+  });
+
+  describe('revokeGrant', () => {
+    it('delegates to GrantsService with id and reason', async () => {
+      const result = await controller.revokeGrant(GRANT_ID, { reason: 'test reason' });
+
+      expect(grantsService.revokeGrant).toHaveBeenCalledWith(GRANT_ID, 'test reason');
+      expect(result).toMatchObject({ status: 'revoked' });
+    });
+
+    it('delegates without reason when omitted', async () => {
+      await controller.revokeGrant(GRANT_ID, {});
+
+      expect(grantsService.revokeGrant).toHaveBeenCalledWith(GRANT_ID, undefined);
+    });
+  });
+
+  describe('generateToken', () => {
+    it('returns enrollmentUrl containing the token', async () => {
+      const token = 'abc123def456abc123def456abc123def456abc123def456abc123def456ab12';
+      vi.mocked(enrollmentService.createToken).mockResolvedValueOnce({
+        token,
+        expiresAt: '2026-01-01T00:15:00.000Z',
+      });
+
+      const result = await controller.generateToken(GRANT_ID, { ttlSeconds: 900 });
+
+      expect(result.token).toBe(token);
+      expect(result.enrollmentUrl).toContain(token);
+      expect(result.enrollmentUrl).toContain('/api/federation/enrollment/');
+    });
+
+    it('creates token via EnrollmentService with correct grantId and peerId', async () => {
+      await controller.generateToken(GRANT_ID, { ttlSeconds: 300 });
+
+      expect(enrollmentService.createToken).toHaveBeenCalledWith({
+        grantId: GRANT_ID,
+        peerId: PEER_ID,
+        ttlSeconds: 300,
+      });
+    });
+
+    it('throws NotFoundException when grant does not exist', async () => {
+      vi.mocked(grantsService.getGrant).mockRejectedValueOnce(
+        new NotFoundException(`Grant ${GRANT_ID} not found`),
+      );
+
+      await expect(controller.generateToken(GRANT_ID, { ttlSeconds: 900 })).rejects.toThrow(
+        NotFoundException,
+      );
+    });
+  });
+
+  // ─── Peer management ───────────────────────────────────────────────────
+
+  describe('listPeers', () => {
+    it('returns DB rows ordered by commonName', async () => {
+      const result = await controller.listPeers();
+
+      expect(db.select).toHaveBeenCalled();
+      // The DB mock resolves with [MOCK_PEER]
+      expect(result).toEqual([MOCK_PEER]);
+    });
+  });
+});

apps/gateway/src/federation/__tests__/grants.service.spec.ts

@@ -0,0 +1,351 @@
+/**
+ * Unit tests for GrantsService — federation grants CRUD + status transitions (FED-M2-06).
+ *
+ * Coverage:
+ *  - createGrant: validates scope via parseFederationScope
+ *  - createGrant: inserts with status 'pending'
+ *  - getGrant: returns grant when found
+ *  - getGrant: throws NotFoundException when not found
+ *  - listGrants: no filters returns all grants
+ *  - listGrants: filters by peerId
+ *  - listGrants: filters by subjectUserId
+ *  - listGrants: filters by status
+ *  - listGrants: multiple filters combined
+ *  - activateGrant: pending → active works
+ *  - activateGrant: non-pending throws ConflictException
+ *  - revokeGrant: active → revoked works, sets revokedAt
+ *  - revokeGrant: non-active throws ConflictException
+ *  - expireGrant: active → expired works
+ *  - expireGrant: non-active throws ConflictException
+ */
+
+import 'reflect-metadata';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { ConflictException, NotFoundException } from '@nestjs/common';
+import type { Db } from '@mosaicstack/db';
+import { GrantsService } from '../grants.service.js';
+import { FederationScopeError } from '../scope-schema.js';
+
+// ---------------------------------------------------------------------------
+// Minimal valid federation scope for testing
+// ---------------------------------------------------------------------------
+const VALID_SCOPE = {
+  resources: ['tasks'] as const,
+  excluded_resources: [],
+  max_rows_per_query: 100,
+};
+
+const PEER_ID = 'a1111111-1111-1111-1111-111111111111';
+const USER_ID = 'u2222222-2222-2222-2222-222222222222';
+const GRANT_ID = 'g3333333-3333-3333-3333-333333333333';
+
+// ---------------------------------------------------------------------------
+// Build a mock DB that mimics chained Drizzle query builder calls
+// ---------------------------------------------------------------------------
+
+function makeMockGrant(overrides: Partial<Record<string, unknown>> = {}) {
+  return {
+    id: GRANT_ID,
+    peerId: PEER_ID,
+    subjectUserId: USER_ID,
+    scope: VALID_SCOPE,
+    status: 'pending',
+    expiresAt: null,
+    createdAt: new Date('2026-01-01T00:00:00Z'),
+    revokedAt: null,
+    revokedReason: null,
+    ...overrides,
+  };
+}
+
+function makeDb(
+  overrides: {
+    insertReturning?: unknown[];
+    selectRows?: unknown[];
+    updateReturning?: unknown[];
+  } = {},
+) {
+  const insertReturning = overrides.insertReturning ?? [makeMockGrant()];
+  const selectRows = overrides.selectRows ?? [makeMockGrant()];
+  const updateReturning = overrides.updateReturning ?? [makeMockGrant({ status: 'active' })];
+
+  // Drizzle returns a chainable builder; we need to mock the full chain.
+  const returningInsert = vi.fn().mockResolvedValue(insertReturning);
+  const valuesInsert = vi.fn().mockReturnValue({ returning: returningInsert });
+  const insertMock = vi.fn().mockReturnValue({ values: valuesInsert });
+
+  // select().from().where().limit()
+  const limitSelect = vi.fn().mockResolvedValue(selectRows);
+  const whereSelect = vi.fn().mockReturnValue({ limit: limitSelect });
+  // from returns something that is both thenable (for full-table select) and has .where()
+  const fromSelect = vi.fn().mockReturnValue({
+    where: whereSelect,
+    limit: limitSelect,
+    // Make it thenable for listGrants with no filters (await db.select().from(federationGrants))
+    then: (resolve: (v: unknown) => unknown) => resolve(selectRows),
+  });
+  const selectMock = vi.fn().mockReturnValue({ from: fromSelect });
+
+  const returningUpdate = vi.fn().mockResolvedValue(updateReturning);
+  const whereUpdate = vi.fn().mockReturnValue({ returning: returningUpdate });
+  const setMock = vi.fn().mockReturnValue({ where: whereUpdate });
+  const updateMock = vi.fn().mockReturnValue({ set: setMock });
+
+  return {
+    insert: insertMock,
+    select: selectMock,
+    update: updateMock,
+    // Expose internals for assertions
+    _mocks: {
+      insertReturning,
+      valuesInsert,
+      insertMock,
+      limitSelect,
+      whereSelect,
+      fromSelect,
+      selectMock,
+      returningUpdate,
+      whereUpdate,
+      setMock,
+      updateMock,
+    },
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+describe('GrantsService', () => {
+  let db: ReturnType<typeof makeDb>;
+  let service: GrantsService;
+
+  beforeEach(() => {
+    db = makeDb();
+    service = new GrantsService(db as unknown as Db);
+  });
+
+  // ─── createGrant ──────────────────────────────────────────────────────────
+
+  describe('createGrant', () => {
+    it('calls parseFederationScope — rejects an invalid scope', async () => {
+      const invalidScope = { resources: [], max_rows_per_query: 0 };
+      await expect(
+        service.createGrant({ peerId: PEER_ID, subjectUserId: USER_ID, scope: invalidScope }),
+      ).rejects.toBeInstanceOf(FederationScopeError);
+    });
+
+    it('inserts a grant with status pending and returns it', async () => {
+      const result = await service.createGrant({
+        peerId: PEER_ID,
+        subjectUserId: USER_ID,
+        scope: VALID_SCOPE,
+      });
+
+      expect(db._mocks.valuesInsert).toHaveBeenCalledWith(
+        expect.objectContaining({ status: 'pending', peerId: PEER_ID, subjectUserId: USER_ID }),
+      );
+      expect(result.status).toBe('pending');
+    });
+
+    it('passes expiresAt as a Date when provided', async () => {
+      await service.createGrant({
+        peerId: PEER_ID,
+        subjectUserId: USER_ID,
+        scope: VALID_SCOPE,
+        expiresAt: '2027-01-01T00:00:00Z',
+      });
+
+      expect(db._mocks.valuesInsert).toHaveBeenCalledWith(
+        expect.objectContaining({ expiresAt: expect.any(Date) }),
+      );
+    });
+
+    it('sets expiresAt to null when not provided', async () => {
+      await service.createGrant({ peerId: PEER_ID, subjectUserId: USER_ID, scope: VALID_SCOPE });
+
+      expect(db._mocks.valuesInsert).toHaveBeenCalledWith(
+        expect.objectContaining({ expiresAt: null }),
+      );
+    });
+  });
+
+  // ─── getGrant ─────────────────────────────────────────────────────────────
+
+  describe('getGrant', () => {
+    it('returns the grant when found', async () => {
+      const result = await service.getGrant(GRANT_ID);
+      expect(result.id).toBe(GRANT_ID);
+    });
+
+    it('throws NotFoundException when no rows returned', async () => {
+      db = makeDb({ selectRows: [] });
+      service = new GrantsService(db as unknown as Db);
+      await expect(service.getGrant(GRANT_ID)).rejects.toBeInstanceOf(NotFoundException);
+    });
+  });
+
+  // ─── listGrants ───────────────────────────────────────────────────────────
+
+  describe('listGrants', () => {
+    it('queries without where clause when no filters provided', async () => {
+      const result = await service.listGrants({});
+      expect(Array.isArray(result)).toBe(true);
+    });
+
+    it('applies peerId filter', async () => {
+      await service.listGrants({ peerId: PEER_ID });
+      expect(db._mocks.whereSelect).toHaveBeenCalled();
+    });
+
+    it('applies subjectUserId filter', async () => {
+      await service.listGrants({ subjectUserId: USER_ID });
+      expect(db._mocks.whereSelect).toHaveBeenCalled();
+    });
+
+    it('applies status filter', async () => {
+      await service.listGrants({ status: 'active' });
+      expect(db._mocks.whereSelect).toHaveBeenCalled();
+    });
+
+    it('applies multiple filters combined', async () => {
+      await service.listGrants({ peerId: PEER_ID, status: 'pending' });
+      expect(db._mocks.whereSelect).toHaveBeenCalled();
+    });
+  });
+
+  // ─── activateGrant ────────────────────────────────────────────────────────
+
+  describe('activateGrant', () => {
+    it('transitions pending → active and returns updated grant', async () => {
+      db = makeDb({
+        selectRows: [makeMockGrant({ status: 'pending' })],
+        updateReturning: [makeMockGrant({ status: 'active' })],
+      });
+      service = new GrantsService(db as unknown as Db);
+
+      const result = await service.activateGrant(GRANT_ID);
+
+      expect(db._mocks.setMock).toHaveBeenCalledWith({ status: 'active' });
+      expect(result.status).toBe('active');
+    });
+
+    it('throws ConflictException when grant is already active', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'active' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.activateGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+
+    it('throws ConflictException when grant is revoked', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'revoked' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.activateGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+
+    it('throws ConflictException when grant is expired', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'expired' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.activateGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+  });
+
+  // ─── revokeGrant ──────────────────────────────────────────────────────────
+
+  describe('revokeGrant', () => {
+    it('transitions active → revoked and sets revokedAt', async () => {
+      const revokedAt = new Date();
+      db = makeDb({
+        selectRows: [makeMockGrant({ status: 'active' })],
+        updateReturning: [makeMockGrant({ status: 'revoked', revokedAt })],
+      });
+      service = new GrantsService(db as unknown as Db);
+
+      const result = await service.revokeGrant(GRANT_ID, 'test reason');
+
+      expect(db._mocks.setMock).toHaveBeenCalledWith(
+        expect.objectContaining({
+          status: 'revoked',
+          revokedAt: expect.any(Date),
+          revokedReason: 'test reason',
+        }),
+      );
+      expect(result.status).toBe('revoked');
+    });
+
+    it('sets revokedReason to null when not provided', async () => {
+      db = makeDb({
+        selectRows: [makeMockGrant({ status: 'active' })],
+        updateReturning: [makeMockGrant({ status: 'revoked', revokedAt: new Date() })],
+      });
+      service = new GrantsService(db as unknown as Db);
+
+      await service.revokeGrant(GRANT_ID);
+
+      expect(db._mocks.setMock).toHaveBeenCalledWith(
+        expect.objectContaining({ revokedReason: null }),
+      );
+    });
+
+    it('throws ConflictException when grant is pending', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'pending' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.revokeGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+
+    it('throws ConflictException when grant is already revoked', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'revoked' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.revokeGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+
+    it('throws ConflictException when grant is expired', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'expired' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.revokeGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+  });
+
+  // ─── expireGrant ──────────────────────────────────────────────────────────
+
+  describe('expireGrant', () => {
+    it('transitions active → expired and returns updated grant', async () => {
+      db = makeDb({
+        selectRows: [makeMockGrant({ status: 'active' })],
+        updateReturning: [makeMockGrant({ status: 'expired' })],
+      });
+      service = new GrantsService(db as unknown as Db);
+
+      const result = await service.expireGrant(GRANT_ID);
+
+      expect(db._mocks.setMock).toHaveBeenCalledWith({ status: 'expired' });
+      expect(result.status).toBe('expired');
+    });
+
+    it('throws ConflictException when grant is pending', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'pending' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.expireGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+
+    it('throws ConflictException when grant is already expired', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'expired' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.expireGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+
+    it('throws ConflictException when grant is revoked', async () => {
+      db = makeDb({ selectRows: [makeMockGrant({ status: 'revoked' })] });
+      service = new GrantsService(db as unknown as Db);
+
+      await expect(service.expireGrant(GRANT_ID)).rejects.toBeInstanceOf(ConflictException);
+    });
+  });
+});

apps/gateway/src/federation/__tests__/helpers/test-cert.ts

@@ -0,0 +1,138 @@
+/**
+ * Test helpers for generating real X.509 PEM certificates in unit tests.
+ *
+ * PR #501 (FED-M2-11) introduced strict `new X509Certificate(certPem)` parsing
+ * in both EnrollmentService.extractCertNotAfter and CaService.issueCert — dummy
+ * cert strings now throw `error:0680007B:asn1 encoding routines::header too long`.
+ *
+ * These helpers produce minimal but cryptographically valid self-signed EC P-256
+ * certificates via @peculiar/x509 + Node.js webcrypto, suitable for test mocks.
+ *
+ * Two variants:
+ *  - makeSelfSignedCert()          Plain cert — satisfies node:crypto X509Certificate parse.
+ *  - makeMosaicIssuedCert(opts)    Cert with custom Mosaic OID extensions — satisfies the
+ *                                  CRIT-1 OID presence + value checks in CaService.issueCert.
+ */
+
+import { webcrypto } from 'node:crypto';
+import {
+  X509CertificateGenerator,
+  Extension,
+  KeyUsagesExtension,
+  KeyUsageFlags,
+  BasicConstraintsExtension,
+  cryptoProvider,
+} from '@peculiar/x509';
+
+// ---------------------------------------------------------------------------
+// Internal helpers
+// ---------------------------------------------------------------------------
+
+/**
+ * Encode a string as an ASN.1 UTF8String TLV:
+ *   0x0C (tag) + 1-byte length (for strings ≤ 127 bytes) + UTF-8 bytes.
+ *
+ * CaService.issueCert reads the extension value as:
+ *   decoder.decode(grantIdExt.value.slice(2))
+ * i.e. it skips the tag + length byte and decodes the remainder as UTF-8.
+ * So we must produce exactly this encoding as the OCTET STRING content.
+ */
+function encodeUtf8String(value: string): Uint8Array {
+  const utf8 = new TextEncoder().encode(value);
+  if (utf8.length > 127) {
+    throw new Error('encodeUtf8String: value too long for single-byte length encoding');
+  }
+  const buf = new Uint8Array(2 + utf8.length);
+  buf[0] = 0x0c; // ASN.1 UTF8String tag
+  buf[1] = utf8.length;
+  buf.set(utf8, 2);
+  return buf;
+}
+
+// ---------------------------------------------------------------------------
+// Mosaic OID constants (must match production CaService)
+// ---------------------------------------------------------------------------
+
+const OID_MOSAIC_GRANT_ID = '1.3.6.1.4.1.99999.1';
+const OID_MOSAIC_SUBJECT_USER_ID = '1.3.6.1.4.1.99999.2';
+
+// ---------------------------------------------------------------------------
+// Public API
+// ---------------------------------------------------------------------------
+
+/**
+ * Generate a minimal self-signed EC P-256 certificate valid for 1 day.
+ * CN=harness-test, no custom extensions.
+ *
+ * Suitable for:
+ *  - EnrollmentService.extractCertNotAfter (just needs parseable PEM)
+ *  - Any mock that returns certPem / certChainPem without OID checks
+ */
+export async function makeSelfSignedCert(): Promise<string> {
+  // Ensure @peculiar/x509 uses Node.js webcrypto (available as globalThis.crypto in Node 19+,
+  // but we set it explicitly here to be safe on all Node 18+ versions).
+  cryptoProvider.set(webcrypto as unknown as Parameters<typeof cryptoProvider.set>[0]);
+
+  const alg = { name: 'ECDSA', namedCurve: 'P-256', hash: 'SHA-256' } as const;
+  const keys = await webcrypto.subtle.generateKey(alg, false, ['sign', 'verify']);
+
+  const now = new Date();
+  const tomorrow = new Date(now.getTime() + 86_400_000);
+
+  const cert = await X509CertificateGenerator.createSelfSigned({
+    serialNumber: '01',
+    name: 'CN=harness-test',
+    notBefore: now,
+    notAfter: tomorrow,
+    signingAlgorithm: alg,
+    keys,
+    extensions: [
+      new BasicConstraintsExtension(false),
+      new KeyUsagesExtension(KeyUsageFlags.digitalSignature),
+    ],
+  });
+
+  return cert.toString('pem');
+}
+
+/**
+ * Generate a self-signed EC P-256 certificate that contains the two custom
+ * Mosaic OID extensions required by CaService.issueCert's CRIT-1 check:
+ *   OID 1.3.6.1.4.1.99999.1  → mosaic_grant_id   (value = grantId)
+ *   OID 1.3.6.1.4.1.99999.2  → mosaic_subject_user_id (value = subjectUserId)
+ *
+ * The extension value encoding matches the production parser's `.slice(2)` assumption:
+ * each extension value is an OCTET STRING wrapping an ASN.1 UTF8String TLV.
+ */
+export async function makeMosaicIssuedCert(opts: {
+  grantId: string;
+  subjectUserId: string;
+}): Promise<string> {
+  // Ensure @peculiar/x509 uses Node.js webcrypto.
+  cryptoProvider.set(webcrypto as unknown as Parameters<typeof cryptoProvider.set>[0]);
+
+  const alg = { name: 'ECDSA', namedCurve: 'P-256', hash: 'SHA-256' } as const;
+  const keys = await webcrypto.subtle.generateKey(alg, false, ['sign', 'verify']);
+
+  const now = new Date();
+  const tomorrow = new Date(now.getTime() + 86_400_000);
+
+  const cert = await X509CertificateGenerator.createSelfSigned({
+    serialNumber: '01',
+    name: 'CN=mosaic-issued-test',
+    notBefore: now,
+    notAfter: tomorrow,
+    signingAlgorithm: alg,
+    keys,
+    extensions: [
+      new BasicConstraintsExtension(false),
+      new KeyUsagesExtension(KeyUsageFlags.digitalSignature),
+      // mosaic_grant_id — OID 1.3.6.1.4.1.99999.1
+      new Extension(OID_MOSAIC_GRANT_ID, false, encodeUtf8String(opts.grantId)),
+      // mosaic_subject_user_id — OID 1.3.6.1.4.1.99999.2
+      new Extension(OID_MOSAIC_SUBJECT_USER_ID, false, encodeUtf8String(opts.subjectUserId)),
+    ],
+  });
+
+  return cert.toString('pem');
+}

apps/gateway/src/federation/__tests__/peer-key.spec.ts

@@ -0,0 +1,63 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { sealClientKey, unsealClientKey } from '../peer-key.util.js';
+
+const TEST_SECRET = 'test-secret-for-peer-key-unit-tests-only';
+
+const TEST_PEM = `-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC7o4qne60TB3wo
+pCOW8QqstpxEBpnFo37JxLYEJbpE3gUlJajsHv9UWRQ7m5B7n+MBXwTCQqMEY8Wl
+kHv9tGgz1YGwzBjNKxPJXE6pPTXQ1Oa0VB9l3qHdqF5HtZoJzE0c6dO8HJ5YUVL
+-----END PRIVATE KEY-----`;
+
+let savedSecret: string | undefined;
+
+beforeEach(() => {
+  savedSecret = process.env['BETTER_AUTH_SECRET'];
+  process.env['BETTER_AUTH_SECRET'] = TEST_SECRET;
+});
+
+afterEach(() => {
+  if (savedSecret === undefined) {
+    delete process.env['BETTER_AUTH_SECRET'];
+  } else {
+    process.env['BETTER_AUTH_SECRET'] = savedSecret;
+  }
+});
+
+describe('peer-key seal/unseal', () => {
+  it('round-trip: unsealClientKey(sealClientKey(pem)) returns original pem', () => {
+    const sealed = sealClientKey(TEST_PEM);
+    const roundTripped = unsealClientKey(sealed);
+    expect(roundTripped).toBe(TEST_PEM);
+  });
+
+  it('non-determinism: sealClientKey produces different ciphertext each call', () => {
+    const sealed1 = sealClientKey(TEST_PEM);
+    const sealed2 = sealClientKey(TEST_PEM);
+    expect(sealed1).not.toBe(sealed2);
+  });
+
+  it('at-rest: sealed output does not contain plaintext PEM content', () => {
+    const sealed = sealClientKey(TEST_PEM);
+    expect(sealed).not.toContain('PRIVATE KEY');
+    expect(sealed).not.toContain(
+      'MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC7o4qne60TB3wo',
+    );
+  });
+
+  it('tamper: flipping a byte in the sealed payload causes unseal to throw', () => {
+    const sealed = sealClientKey(TEST_PEM);
+    const buf = Buffer.from(sealed, 'base64');
+    // Flip a byte in the middle of the buffer (past IV and authTag)
+    const midpoint = Math.floor(buf.length / 2);
+    buf[midpoint] = buf[midpoint]! ^ 0xff;
+    const tampered = buf.toString('base64');
+    expect(() => unsealClientKey(tampered)).toThrow();
+  });
+
+  it('missing secret: unsealClientKey throws when BETTER_AUTH_SECRET is unset', () => {
+    const sealed = sealClientKey(TEST_PEM);
+    delete process.env['BETTER_AUTH_SECRET'];
+    expect(() => unsealClientKey(sealed)).toThrow('BETTER_AUTH_SECRET is not set');
+  });
+});

apps/gateway/src/federation/ca.dto.ts

@@ -0,0 +1,57 @@
+/**
+ * DTOs for the Step-CA client service (FED-M2-04).
+ *
+ * IssueCertRequestDto  — input to CaService.issueCert()
+ * IssuedCertDto        — output from CaService.issueCert()
+ */
+
+import { IsInt, IsNotEmpty, IsOptional, IsString, IsUUID, Max, Min } from 'class-validator';
+
+export class IssueCertRequestDto {
+  /**
+   * PEM-encoded PKCS#10 Certificate Signing Request.
+   * The CSR must already include the desired SANs.
+   */
+  @IsString()
+  @IsNotEmpty()
+  csrPem!: string;
+
+  /**
+   * UUID of the federation_grants row this certificate is being issued for.
+   * Embedded as the `mosaic_grant_id` custom OID extension.
+   */
+  @IsUUID()
+  grantId!: string;
+
+  /**
+   * UUID of the local user on whose behalf the cert is being issued.
+   * Embedded as the `mosaic_subject_user_id` custom OID extension.
+   */
+  @IsUUID()
+  subjectUserId!: string;
+
+  /**
+   * Requested certificate validity in seconds.
+   * Hard cap: 900 s (15 minutes). Default: 300 s (5 minutes).
+   * The service will always clamp to 900 s regardless of this value.
+   */
+  @IsOptional()
+  @IsInt()
+  @Min(60)
+  @Max(15 * 60)
+  ttlSeconds: number = 300;
+}
+
+export class IssuedCertDto {
+  /** PEM-encoded leaf certificate returned by step-ca. */
+  certPem!: string;
+
+  /**
+   * PEM-encoded full certificate chain (leaf + intermediates + root).
+   * Falls back to `certPem` when step-ca returns no `certChain` field.
+   */
+  certChainPem!: string;
+
+  /** Decimal serial number string of the issued certificate. */
+  serialNumber!: string;
+}

apps/gateway/src/federation/ca.service.spec.ts

@@ -0,0 +1,592 @@
+/**
+ * Unit tests for CaService — Step-CA client (FED-M2-04).
+ *
+ * Coverage:
+ *  - Happy path: returns IssuedCertDto with certPem, certChainPem, serialNumber
+ *  - certChainPem fallback: falls back to certPem when certChain absent
+ *  - certChainPem from ca field: uses crt+ca when certChain absent but ca present
+ *  - HTTP 401: throws CaServiceError with cause + remediation
+ *  - HTTP non-401 error: throws CaServiceError
+ *  - Malformed CSR: throws before HTTP call (INVALID_CSR)
+ *  - Non-JSON response: throws CaServiceError
+ *  - HTTPS connection error: throws CaServiceError
+ *  - JWT custom claims: mosaic_grant_id and mosaic_subject_user_id present in OTT payload
+ *    verified with jose.jwtVerify (real signature check)
+ *  - CaServiceError: has cause + remediation properties
+ *  - Missing crt in response: throws CaServiceError
+ *  - Real CSR validation: valid P-256 CSR passes; malformed CSR fails with INVALID_CSR
+ *  - provisionerPassword never appears in CaServiceError messages
+ *  - HTTPS-only enforcement: http:// URL throws in constructor
+ */
+
+import 'reflect-metadata';
+import { describe, it, expect, vi, beforeEach, beforeAll, type Mock } from 'vitest';
+import { jwtVerify, exportJWK, generateKeyPair } from 'jose';
+import { Pkcs10CertificateRequestGenerator } from '@peculiar/x509';
+import { makeMosaicIssuedCert } from './__tests__/helpers/test-cert.js';
+
+// ---------------------------------------------------------------------------
+// Mock node:https BEFORE importing CaService so the mock is in place when
+// the module is loaded. Vitest/ESM require vi.mock at the top level.
+// ---------------------------------------------------------------------------
+
+vi.mock('node:https', () => {
+  const mockRequest = vi.fn();
+  const mockAgent = vi.fn().mockImplementation(() => ({}));
+  return {
+    default: { request: mockRequest, Agent: mockAgent },
+    request: mockRequest,
+    Agent: mockAgent,
+  };
+});
+
+vi.mock('node:fs', () => {
+  const mockReadFileSync = vi
+    .fn()
+    .mockReturnValue('-----BEGIN CERTIFICATE-----\nFAKEROOT\n-----END CERTIFICATE-----\n');
+  return {
+    default: { readFileSync: mockReadFileSync },
+    readFileSync: mockReadFileSync,
+  };
+});
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+// Real self-signed EC P-256 certificate generated with openssl for testing.
+// openssl req -x509 -newkey ec -pkeyopt ec_paramgen_curve:P-256 -nodes -keyout /dev/null \
+//   -out /dev/stdout -subj "/CN=test" -days 1
+const FAKE_CERT_PEM = `-----BEGIN CERTIFICATE-----
+MIIBdDCCARmgAwIBAgIUM+iUJSayN+PwXkyVN6qwSY7sr6gwCgYIKoZIzj0EAwIw
+DzENMAsGA1UEAwwEdGVzdDAeFw0yNjA0MjIwMzE5MTlaFw0yNjA0MjMwMzE5MTla
+MA8xDTALBgNVBAMMBHRlc3QwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAR21kHL
+n1GmFQ4TEBw3EA53pD+2McIBf5WcoHE+x0eMz5DpRKJe0ksHwOVN5Yev5d57kb+4
+MvG1LhbHCB/uQo8So1MwUTAdBgNVHQ4EFgQUPq0pdIGiQ7pLBRXICS8GTliCrLsw
+HwYDVR0jBBgwFoAUPq0pdIGiQ7pLBRXICS8GTliCrLswDwYDVR0TAQH/BAUwAwEB
+/zAKBggqhkjOPQQDAgNJADBGAiEAypJqyC6S77aQ3eEXokM6sgAsD7Oa3tJbCbVm
+zG3uJb0CIQC1w+GE+Ad0OTR5Quja46R1RjOo8ydpzZ7Fh4rouAiwEw==
+-----END CERTIFICATE-----
+`;
+
+// Use a second copy of the same cert for the CA field in tests.
+const FAKE_CA_PEM = FAKE_CERT_PEM;
+
+const GRANT_ID = 'a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a11';
+const SUBJECT_USER_ID = 'b1ffcd00-0d1c-5f09-cc7e-7cc0ce491b22';
+
+// Real self-signed cert containing both Mosaic OID extensions — populated in beforeAll.
+// Required because CaService.issueCert performs CRIT-1 OID presence/value checks on the
+// response cert (PR #501 — strict parsing, no silent fallback).
+let realIssuedCertPem: string;
+
+// ---------------------------------------------------------------------------
+// Generate a real EC P-256 key pair and CSR for integration-style tests
+// ---------------------------------------------------------------------------
+
+// We generate this once at module level so it's available to all tests.
+// The key pair and CSR PEM are populated asynchronously in the test that needs them.
+
+let realCsrPem: string;
+
+async function generateRealCsr(): Promise<string> {
+  const { privateKey, publicKey } = await generateKeyPair('ES256');
+  // Export public key JWK for potential verification (not used here but confirms key is exportable)
+  await exportJWK(publicKey);
+
+  // Use @peculiar/x509 to build a proper CSR
+  const csr = await Pkcs10CertificateRequestGenerator.create({
+    name: 'CN=test.federation.local',
+    signingAlgorithm: { name: 'ECDSA', hash: 'SHA-256' },
+    keys: { privateKey, publicKey },
+  });
+
+  return csr.toString('pem');
+}
+
+// ---------------------------------------------------------------------------
+// Setup env before importing service
+// We use an EC P-256 key pair here so the JWK-based signing works.
+// The key pair is generated once and stored in module-level vars.
+// ---------------------------------------------------------------------------
+
+// Real EC P-256 test JWK (test-only, never used in production).
+// Generated with node webcrypto for use in unit tests.
+const TEST_EC_PRIVATE_JWK = {
+  key_ops: ['sign'],
+  ext: true,
+  kty: 'EC',
+  x: 'Xq2RjZctcPcUMU14qfjs3MtZTmFk8z1lFGQyypgXZOU',
+  y: 't8w9Cbt4RVmR47Wnb_i5cLwefEnMcvwse049zu9Rl_E',
+  crv: 'P-256',
+  d: 'TM6N79w1HE-PiML5Td4mbXfJaLHEaZrVyVrrwlJv7q8',
+  kid: 'test-ec-kid',
+};
+
+const TEST_EC_PUBLIC_JWK = {
+  key_ops: ['verify'],
+  ext: true,
+  kty: 'EC',
+  x: 'Xq2RjZctcPcUMU14qfjs3MtZTmFk8z1lFGQyypgXZOU',
+  y: 't8w9Cbt4RVmR47Wnb_i5cLwefEnMcvwse049zu9Rl_E',
+  crv: 'P-256',
+  kid: 'test-ec-kid',
+};
+
+process.env['STEP_CA_URL'] = 'https://step-ca:9000';
+process.env['STEP_CA_PROVISIONER_KEY_JSON'] = JSON.stringify(TEST_EC_PRIVATE_JWK);
+process.env['STEP_CA_ROOT_CERT_PATH'] = '/fake/root.pem';
+
+// Import AFTER env is set and mocks are registered
+import * as httpsModule from 'node:https';
+import { CaService, CaServiceError } from './ca.service.js';
+import type { IssueCertRequestDto } from './ca.dto.js';
+
+// ---------------------------------------------------------------------------
+// Helper to build a mock https.request that simulates step-ca
+// ---------------------------------------------------------------------------
+
+function makeHttpsMock(statusCode: number, body: unknown, errorMsg?: string): void {
+  const mockReq = {
+    write: vi.fn(),
+    end: vi.fn(),
+    on: vi.fn(),
+    setTimeout: vi.fn(),
+  };
+
+  (httpsModule.request as unknown as Mock).mockImplementation(
+    (
+      _options: unknown,
+      callback: (res: {
+        statusCode: number;
+        on: (event: string, cb: (chunk?: Buffer) => void) => void;
+      }) => void,
+    ) => {
+      const mockRes = {
+        statusCode,
+        on: (event: string, cb: (chunk?: Buffer) => void) => {
+          if (event === 'data') {
+            if (body !== undefined) {
+              cb(Buffer.from(typeof body === 'string' ? body : JSON.stringify(body)));
+            }
+          }
+          if (event === 'end') {
+            cb();
+          }
+        },
+      };
+
+      if (errorMsg) {
+        // Simulate a connection error via the req.on('error') handler
+        mockReq.on.mockImplementation((event: string, cb: (err: Error) => void) => {
+          if (event === 'error') {
+            setImmediate(() => cb(new Error(errorMsg)));
+          }
+        });
+      } else {
+        // Normal flow: call the response callback
+        setImmediate(() => callback(mockRes));
+      }
+
+      return mockReq;
+    },
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+describe('CaService', () => {
+  let service: CaService;
+
+  beforeAll(async () => {
+    // Generate a cert with the two Mosaic OIDs so that CaService.issueCert's
+    // CRIT-1 OID checks pass when mock step-ca returns it as `crt`.
+    realIssuedCertPem = await makeMosaicIssuedCert({
+      grantId: GRANT_ID,
+      subjectUserId: SUBJECT_USER_ID,
+    });
+  });
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    service = new CaService();
+  });
+
+  function makeReq(overrides: Partial<IssueCertRequestDto> = {}): IssueCertRequestDto {
+    // Use a real CSR if available; fall back to a minimal placeholder
+    const defaultCsr = realCsrPem ?? makeFakeCsr();
+    return {
+      csrPem: defaultCsr,
+      grantId: GRANT_ID,
+      subjectUserId: SUBJECT_USER_ID,
+      ttlSeconds: 300,
+      ...overrides,
+    };
+  }
+
+  function makeFakeCsr(): string {
+    // A structurally valid-looking CSR header/footer (body will fail crypto verify)
+    return `-----BEGIN CERTIFICATE REQUEST-----\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0000000000000000AAAA\n-----END CERTIFICATE REQUEST-----\n`;
+  }
+
+  // -------------------------------------------------------------------------
+  // Real CSR generation — runs once and populates realCsrPem
+  // -------------------------------------------------------------------------
+
+  it('generates a real P-256 CSR that passes validateCsr', async () => {
+    realCsrPem = await generateRealCsr();
+    expect(realCsrPem).toMatch(/BEGIN CERTIFICATE REQUEST/);
+
+    // Now test that the service's validateCsr accepts it.
+    // We call it indirectly via issueCert with a successful mock.
+    makeHttpsMock(200, { crt: realIssuedCertPem, certChain: [realIssuedCertPem, FAKE_CA_PEM] });
+    const result = await service.issueCert(makeReq({ csrPem: realCsrPem }));
+    expect(result.certPem).toBe(realIssuedCertPem);
+  });
+
+  it('throws INVALID_CSR for a malformed PEM-shaped CSR', async () => {
+    const malformedCsr =
+      '-----BEGIN CERTIFICATE REQUEST-----\nTm90QVJlYWxDU1I=\n-----END CERTIFICATE REQUEST-----\n';
+
+    await expect(service.issueCert(makeReq({ csrPem: malformedCsr }))).rejects.toSatisfy(
+      (err: unknown) => {
+        if (!(err instanceof CaServiceError)) return false;
+        expect(err.code).toBe('INVALID_CSR');
+        return true;
+      },
+    );
+  });
+
+  // -------------------------------------------------------------------------
+  // Happy path
+  // -------------------------------------------------------------------------
+
+  it('returns IssuedCertDto on success (certChain present)', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(200, {
+      crt: realIssuedCertPem,
+      certChain: [realIssuedCertPem, FAKE_CA_PEM],
+    });
+
+    const result = await service.issueCert(makeReq());
+
+    expect(result.certPem).toBe(realIssuedCertPem);
+    expect(result.certChainPem).toContain(realIssuedCertPem);
+    expect(result.certChainPem).toContain(FAKE_CA_PEM);
+    expect(typeof result.serialNumber).toBe('string');
+  });
+
+  // -------------------------------------------------------------------------
+  // certChainPem fallback — certChain absent, ca field present
+  // -------------------------------------------------------------------------
+
+  it('builds certChainPem from crt+ca when certChain is absent', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(200, {
+      crt: realIssuedCertPem,
+      ca: FAKE_CA_PEM,
+    });
+
+    const result = await service.issueCert(makeReq());
+
+    expect(result.certPem).toBe(realIssuedCertPem);
+    expect(result.certChainPem).toContain(realIssuedCertPem);
+    expect(result.certChainPem).toContain(FAKE_CA_PEM);
+  });
+
+  // -------------------------------------------------------------------------
+  // certChainPem fallback — no certChain, no ca field
+  // -------------------------------------------------------------------------
+
+  it('falls back to certPem alone when certChain and ca are absent', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(200, { crt: realIssuedCertPem });
+
+    const result = await service.issueCert(makeReq());
+
+    expect(result.certPem).toBe(realIssuedCertPem);
+    expect(result.certChainPem).toBe(realIssuedCertPem);
+  });
+
+  // -------------------------------------------------------------------------
+  // HTTP 401
+  // -------------------------------------------------------------------------
+
+  it('throws CaServiceError on HTTP 401', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(401, { message: 'Unauthorized' });
+
+    await expect(service.issueCert(makeReq())).rejects.toSatisfy((err: unknown) => {
+      if (!(err instanceof CaServiceError)) return false;
+      expect(err.message).toMatch(/401/);
+      expect(err.remediation).toBeTruthy();
+      return true;
+    });
+  });
+
+  // -------------------------------------------------------------------------
+  // HTTP non-401 error (e.g. 422)
+  // -------------------------------------------------------------------------
+
+  it('throws CaServiceError on HTTP 422', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(422, { message: 'Unprocessable Entity' });
+
+    await expect(service.issueCert(makeReq())).rejects.toBeInstanceOf(CaServiceError);
+  });
+
+  // -------------------------------------------------------------------------
+  // Malformed CSR — throws before HTTP call
+  // -------------------------------------------------------------------------
+
+  it('throws CaServiceError for malformed CSR without making HTTP call', async () => {
+    const requestSpy = vi.spyOn(httpsModule, 'request');
+
+    await expect(service.issueCert(makeReq({ csrPem: 'not-a-valid-csr' }))).rejects.toBeInstanceOf(
+      CaServiceError,
+    );
+
+    expect(requestSpy).not.toHaveBeenCalled();
+  });
+
+  // -------------------------------------------------------------------------
+  // Non-JSON response
+  // -------------------------------------------------------------------------
+
+  it('throws CaServiceError when step-ca returns non-JSON', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(200, 'this is not json');
+
+    await expect(service.issueCert(makeReq())).rejects.toSatisfy((err: unknown) => {
+      if (!(err instanceof CaServiceError)) return false;
+      expect(err.message).toMatch(/non-JSON/);
+      return true;
+    });
+  });
+
+  // -------------------------------------------------------------------------
+  // HTTPS connection error
+  // -------------------------------------------------------------------------
+
+  it('throws CaServiceError on HTTPS connection error', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(0, undefined, 'connect ECONNREFUSED 127.0.0.1:9000');
+
+    await expect(service.issueCert(makeReq())).rejects.toSatisfy((err: unknown) => {
+      if (!(err instanceof CaServiceError)) return false;
+      expect(err.message).toMatch(/HTTPS connection/);
+      expect(err.cause).toBeInstanceOf(Error);
+      return true;
+    });
+  });
+
+  // -------------------------------------------------------------------------
+  // JWT custom claims: mosaic_grant_id and mosaic_subject_user_id
+  // Verified with jose.jwtVerify for real signature verification (M6)
+  // -------------------------------------------------------------------------
+
+  it('OTT contains mosaic_grant_id, mosaic_subject_user_id, and jti; signature verifies with jose', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+
+    let capturedBody: Record<string, unknown> | undefined;
+
+    const mockReq = {
+      write: vi.fn((data: string) => {
+        capturedBody = JSON.parse(data) as Record<string, unknown>;
+      }),
+      end: vi.fn(),
+      on: vi.fn(),
+      setTimeout: vi.fn(),
+    };
+
+    (httpsModule.request as unknown as Mock).mockImplementation(
+      (
+        _options: unknown,
+        callback: (res: {
+          statusCode: number;
+          on: (event: string, cb: (chunk?: Buffer) => void) => void;
+        }) => void,
+      ) => {
+        const mockRes = {
+          statusCode: 200,
+          on: (event: string, cb: (chunk?: Buffer) => void) => {
+            if (event === 'data') {
+              cb(Buffer.from(JSON.stringify({ crt: realIssuedCertPem })));
+            }
+            if (event === 'end') {
+              cb();
+            }
+          },
+        };
+        setImmediate(() => callback(mockRes));
+        return mockReq;
+      },
+    );
+
+    await service.issueCert(makeReq({ csrPem: realCsrPem }));
+
+    expect(capturedBody).toBeDefined();
+    const ott = capturedBody!['ott'] as string;
+    expect(typeof ott).toBe('string');
+
+    // Verify JWT structure
+    const parts = ott.split('.');
+    expect(parts).toHaveLength(3);
+
+    // Decode payload without signature check first
+    const payloadJson = Buffer.from(parts[1]!, 'base64url').toString('utf8');
+    const payload = JSON.parse(payloadJson) as Record<string, unknown>;
+
+    expect(payload['mosaic_grant_id']).toBe(GRANT_ID);
+    expect(payload['mosaic_subject_user_id']).toBe(SUBJECT_USER_ID);
+    expect(typeof payload['jti']).toBe('string'); // M2: jti present
+    expect(payload['jti']).toMatch(/^[0-9a-f-]{36}$/); // UUID format
+
+    // M3: top-level sha should NOT be present; step.sha should be present
+    expect(payload['sha']).toBeUndefined();
+    const step = payload['step'] as Record<string, unknown> | undefined;
+    expect(step?.['sha']).toBeDefined();
+
+    // M6: Verify signature with jose.jwtVerify using the public key
+    const { importJWK: importJose } = await import('jose');
+    const publicKey = await importJose(TEST_EC_PUBLIC_JWK, 'ES256');
+    const verified = await jwtVerify(ott, publicKey);
+    expect(verified.payload['mosaic_grant_id']).toBe(GRANT_ID);
+  });
+
+  // -------------------------------------------------------------------------
+  // CaServiceError has cause + remediation
+  // -------------------------------------------------------------------------
+
+  it('CaServiceError carries cause and remediation', () => {
+    const cause = new Error('original error');
+    const err = new CaServiceError('something went wrong', 'fix it like this', cause);
+
+    expect(err).toBeInstanceOf(Error);
+    expect(err).toBeInstanceOf(CaServiceError);
+    expect(err.message).toBe('something went wrong');
+    expect(err.remediation).toBe('fix it like this');
+    expect(err.cause).toBe(cause);
+    expect(err.name).toBe('CaServiceError');
+  });
+
+  // -------------------------------------------------------------------------
+  // Missing crt in response
+  // -------------------------------------------------------------------------
+
+  it('throws CaServiceError when response is missing the crt field', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(200, { ca: FAKE_CA_PEM });
+
+    await expect(service.issueCert(makeReq())).rejects.toSatisfy((err: unknown) => {
+      if (!(err instanceof CaServiceError)) return false;
+      expect(err.message).toMatch(/missing the "crt" field/);
+      return true;
+    });
+  });
+
+  // -------------------------------------------------------------------------
+  // M6: provisionerPassword must never appear in CaServiceError messages
+  // -------------------------------------------------------------------------
+
+  it('provisionerPassword does not appear in any CaServiceError message', async () => {
+    // Temporarily set a recognizable password to test against
+    const originalPassword = process.env['STEP_CA_PROVISIONER_PASSWORD'];
+    process.env['STEP_CA_PROVISIONER_PASSWORD'] = 'super-secret-password-12345';
+
+    // Generate a bad CSR to trigger an error path
+    const caughtErrors: CaServiceError[] = [];
+    try {
+      await service.issueCert(makeReq({ csrPem: 'not-a-csr' }));
+    } catch (err) {
+      if (err instanceof CaServiceError) {
+        caughtErrors.push(err);
+      }
+    }
+
+    // Also try HTTP 401 path
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+    makeHttpsMock(401, { message: 'Unauthorized' });
+    try {
+      await service.issueCert(makeReq({ csrPem: realCsrPem }));
+    } catch (err) {
+      if (err instanceof CaServiceError) {
+        caughtErrors.push(err);
+      }
+    }
+
+    for (const err of caughtErrors) {
+      expect(err.message).not.toContain('super-secret-password-12345');
+      if (err.remediation) {
+        expect(err.remediation).not.toContain('super-secret-password-12345');
+      }
+    }
+
+    process.env['STEP_CA_PROVISIONER_PASSWORD'] = originalPassword;
+  });
+
+  // -------------------------------------------------------------------------
+  // M7: HTTPS-only enforcement in constructor
+  // -------------------------------------------------------------------------
+
+  it('throws in constructor if STEP_CA_URL uses http://', () => {
+    const originalUrl = process.env['STEP_CA_URL'];
+    process.env['STEP_CA_URL'] = 'http://step-ca:9000';
+
+    expect(() => new CaService()).toThrow(CaServiceError);
+
+    process.env['STEP_CA_URL'] = originalUrl;
+  });
+
+  // -------------------------------------------------------------------------
+  // TTL clamp: ttlSeconds is clamped to 900 s (15 min) maximum
+  // -------------------------------------------------------------------------
+
+  it('clamps ttlSeconds to 900 s regardless of input', async () => {
+    if (!realCsrPem) realCsrPem = await generateRealCsr();
+
+    let capturedBody: Record<string, unknown> | undefined;
+
+    const mockReq = {
+      write: vi.fn((data: string) => {
+        capturedBody = JSON.parse(data) as Record<string, unknown>;
+      }),
+      end: vi.fn(),
+      on: vi.fn(),
+      setTimeout: vi.fn(),
+    };
+
+    (httpsModule.request as unknown as Mock).mockImplementation(
+      (
+        _options: unknown,
+        callback: (res: {
+          statusCode: number;
+          on: (event: string, cb: (chunk?: Buffer) => void) => void;
+        }) => void,
+      ) => {
+        const mockRes = {
+          statusCode: 200,
+          on: (event: string, cb: (chunk?: Buffer) => void) => {
+            if (event === 'data') {
+              cb(Buffer.from(JSON.stringify({ crt: realIssuedCertPem })));
+            }
+            if (event === 'end') {
+              cb();
+            }
+          },
+        };
+        setImmediate(() => callback(mockRes));
+        return mockReq;
+      },
+    );
+
+    // Request 86400 s — should be clamped to 900
+    await service.issueCert(makeReq({ ttlSeconds: 86400 }));
+
+    expect(capturedBody).toBeDefined();
+    const validity = capturedBody!['validity'] as Record<string, unknown>;
+    expect(validity['duration']).toBe('900s');
+  });
+});

apps/gateway/src/federation/ca.service.ts

@@ -0,0 +1,680 @@
+/**
+ * CaService — Step-CA client for federation grant certificate issuance.
+ *
+ * Responsibilities:
+ *  1. Build a JWK-provisioner One-Time Token (OTT) signed with the provisioner
+ *     private key (ES256/ES384/RS256 per JWK kty/crv) carrying Mosaic-specific
+ *     claims (`mosaic_grant_id`, `mosaic_subject_user_id`, `step.sha`) per the
+ *     step-ca JWK provisioner protocol.
+ *  2. POST the CSR + OTT to the step-ca `/1.0/sign` endpoint over HTTPS,
+ *     pinning the trust to the CA root cert supplied via env.
+ *  3. Return an IssuedCertDto containing the leaf cert, full chain, and
+ *     serial number.
+ *
+ * Environment variables (all required at runtime — validated in constructor):
+ *   STEP_CA_URL                   https://step-ca:9000
+ *   STEP_CA_PROVISIONER_KEY_JSON  JWK provisioner private key (JSON)
+ *   STEP_CA_ROOT_CERT_PATH        Absolute path to the CA root PEM
+ *
+ * Optional (only used for JWK PBES2 decrypt at startup if key is encrypted):
+ *   STEP_CA_PROVISIONER_PASSWORD  JWK provisioner password (raw string)
+ *
+ * Custom OID registry (PRD §6, docs/federation/SETUP.md):
+ *   1.3.6.1.4.1.99999.1  — mosaic_grant_id
+ *   1.3.6.1.4.1.99999.2  — mosaic_subject_user_id
+ *
+ * Fail-loud contract:
+ *   Every error path throws CaServiceError with a human-readable `remediation`
+ *   field. Silent OID-stripping is NEVER allowed — if the sign response does
+ *   not include the cert, we throw rather than return a cert that may be
+ *   missing the custom extensions.
+ */
+
+import { Injectable, Logger } from '@nestjs/common';
+import * as crypto from 'node:crypto';
+import * as fs from 'node:fs';
+import * as https from 'node:https';
+import { SignJWT, importJWK } from 'jose';
+import { Pkcs10CertificateRequest, X509Certificate } from '@peculiar/x509';
+import type { IssueCertRequestDto } from './ca.dto.js';
+import { IssuedCertDto } from './ca.dto.js';
+
+// ---------------------------------------------------------------------------
+// Custom error class
+// ---------------------------------------------------------------------------
+
+export class CaServiceError extends Error {
+  readonly cause: unknown;
+  readonly remediation: string;
+  readonly code?: string;
+
+  constructor(message: string, remediation: string, cause?: unknown, code?: string) {
+    super(message);
+    this.name = 'CaServiceError';
+    this.cause = cause;
+    this.remediation = remediation;
+    this.code = code;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Internal types
+// ---------------------------------------------------------------------------
+
+interface StepSignResponse {
+  crt: string;
+  ca?: string;
+  certChain?: string[];
+}
+
+interface JwkKey {
+  kty: string;
+  kid?: string;
+  use?: string;
+  alg?: string;
+  k?: string; // symmetric
+  n?: string; // RSA
+  e?: string;
+  d?: string;
+  x?: string; // EC
+  y?: string;
+  crv?: string;
+  [key: string]: unknown;
+}
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+/** UUID regex for validation */
+const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+
+/**
+ * Derive the JWT algorithm string from a JWK's kty/crv fields.
+ * EC P-256 → ES256, EC P-384 → ES384, RSA → RS256.
+ */
+function algFromJwk(jwk: JwkKey): string {
+  if (jwk.alg) return jwk.alg;
+  if (jwk.kty === 'EC') {
+    if (jwk.crv === 'P-384') return 'ES384';
+    return 'ES256'; // default for P-256 and Ed25519-style EC keys
+  }
+  if (jwk.kty === 'RSA') return 'RS256';
+  throw new CaServiceError(
+    `Unsupported JWK kty: ${jwk.kty}`,
+    'STEP_CA_PROVISIONER_KEY_JSON must be an EC (P-256/P-384) or RSA JWK private key.',
+  );
+}
+
+/**
+ * Compute SHA-256 fingerprint of the DER-encoded CSR body.
+ * step-ca uses this as the `step.sha` claim to bind the OTT to a specific CSR.
+ */
+function csrFingerprint(csrPem: string): string {
+  // Strip PEM headers and decode base64 body
+  const b64 = csrPem
+    .replace(/-----BEGIN CERTIFICATE REQUEST-----/, '')
+    .replace(/-----END CERTIFICATE REQUEST-----/, '')
+    .replace(/\s+/g, '');
+
+  let derBuf: Buffer;
+  try {
+    derBuf = Buffer.from(b64, 'base64');
+  } catch (err) {
+    throw new CaServiceError(
+      'Failed to base64-decode the CSR PEM body',
+      'Verify that csrPem is a valid PKCS#10 PEM-encoded certificate request.',
+      err,
+    );
+  }
+
+  if (derBuf.length === 0) {
+    throw new CaServiceError(
+      'CSR PEM decoded to empty buffer — malformed input',
+      'Provide a valid non-empty PKCS#10 PEM-encoded certificate request.',
+    );
+  }
+
+  return crypto.createHash('sha256').update(derBuf).digest('hex');
+}
+
+/**
+ * Send a JSON POST to the step-ca sign endpoint.
+ * Returns the parsed response body or throws CaServiceError.
+ */
+function httpsPost(url: string, body: unknown, agent: https.Agent): Promise<StepSignResponse> {
+  return new Promise((resolve, reject) => {
+    const bodyStr = JSON.stringify(body);
+    const parsed = new URL(url);
+
+    const options: https.RequestOptions = {
+      hostname: parsed.hostname,
+      port: parsed.port ? parseInt(parsed.port, 10) : 443,
+      path: parsed.pathname,
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+        'Content-Length': Buffer.byteLength(bodyStr),
+      },
+      agent,
+      timeout: 5000,
+    };
+
+    const req = https.request(options, (res) => {
+      const chunks: Buffer[] = [];
+      res.on('data', (chunk: Buffer) => chunks.push(chunk));
+      res.on('end', () => {
+        const raw = Buffer.concat(chunks).toString('utf8');
+
+        if (res.statusCode === 401) {
+          reject(
+            new CaServiceError(
+              `step-ca returned HTTP 401 — invalid or expired OTT`,
+              'Check STEP_CA_PROVISIONER_KEY_JSON. Ensure the mosaic-fed provisioner is configured in the CA.',
+            ),
+          );
+          return;
+        }
+
+        if (res.statusCode && res.statusCode >= 400) {
+          reject(
+            new CaServiceError(
+              `step-ca returned HTTP ${res.statusCode}: ${raw.slice(0, 256)}`,
+              `Review the step-ca logs. Status ${res.statusCode} may indicate a CSR policy violation or misconfigured provisioner.`,
+            ),
+          );
+          return;
+        }
+
+        let parsed: unknown;
+        try {
+          parsed = JSON.parse(raw) as unknown;
+        } catch (err) {
+          reject(
+            new CaServiceError(
+              'step-ca returned a non-JSON response',
+              'Verify STEP_CA_URL points to a running step-ca instance and that TLS is properly configured.',
+              err,
+            ),
+          );
+          return;
+        }
+
+        resolve(parsed as StepSignResponse);
+      });
+    });
+
+    req.setTimeout(5000, () => {
+      req.destroy(new Error('Request timed out after 5000ms'));
+    });
+
+    req.on('error', (err: Error) => {
+      reject(
+        new CaServiceError(
+          `HTTPS connection to step-ca failed: ${err.message}`,
+          'Ensure STEP_CA_URL is reachable and STEP_CA_ROOT_CERT_PATH points to the correct CA root certificate.',
+          err,
+        ),
+      );
+    });
+
+    req.write(bodyStr);
+    req.end();
+  });
+}
+
+/**
+ * Extract a decimal serial number from a PEM certificate.
+ * Throws CaServiceError on failure — never silently returns 'unknown'.
+ */
+function extractSerial(certPem: string): string {
+  let cert: crypto.X509Certificate;
+  try {
+    cert = new crypto.X509Certificate(certPem);
+  } catch (err) {
+    throw new CaServiceError(
+      'Failed to parse the issued certificate PEM',
+      'The certificate returned by step-ca could not be parsed. Check that step-ca is returning a valid PEM certificate.',
+      err,
+      'CERT_PARSE',
+    );
+  }
+  return cert.serialNumber;
+}
+
+// ---------------------------------------------------------------------------
+// Service
+// ---------------------------------------------------------------------------
+
+@Injectable()
+export class CaService {
+  private readonly logger = new Logger(CaService.name);
+
+  private readonly caUrl: string;
+  private readonly rootCertPath: string;
+  private readonly httpsAgent: https.Agent;
+  private readonly jwk: JwkKey;
+  private cachedPrivateKey: crypto.KeyObject | null = null;
+  private readonly jwtAlg: string;
+  private readonly kid: string;
+
+  constructor() {
+    const caUrl = process.env['STEP_CA_URL'];
+    const provisionerKeyJson = process.env['STEP_CA_PROVISIONER_KEY_JSON'];
+    const rootCertPath = process.env['STEP_CA_ROOT_CERT_PATH'];
+
+    if (!caUrl) {
+      throw new CaServiceError(
+        'STEP_CA_URL is not set',
+        'Set STEP_CA_URL to the base URL of the step-ca instance, e.g. https://step-ca:9000',
+      );
+    }
+
+    // Enforce HTTPS-only URL
+    let parsedUrl: URL;
+    try {
+      parsedUrl = new URL(caUrl);
+    } catch (err) {
+      throw new CaServiceError(
+        `STEP_CA_URL is not a valid URL: ${caUrl}`,
+        'Set STEP_CA_URL to a valid HTTPS URL, e.g. https://step-ca:9000',
+        err,
+      );
+    }
+    if (parsedUrl.protocol !== 'https:') {
+      throw new CaServiceError(
+        `STEP_CA_URL must use HTTPS — got: ${parsedUrl.protocol}`,
+        'Set STEP_CA_URL to an https:// URL. Unencrypted connections to the CA are not permitted.',
+      );
+    }
+
+    if (!provisionerKeyJson) {
+      throw new CaServiceError(
+        'STEP_CA_PROVISIONER_KEY_JSON is not set',
+        'Set STEP_CA_PROVISIONER_KEY_JSON to the JSON-encoded JWK for the mosaic-fed provisioner.',
+      );
+    }
+    if (!rootCertPath) {
+      throw new CaServiceError(
+        'STEP_CA_ROOT_CERT_PATH is not set',
+        'Set STEP_CA_ROOT_CERT_PATH to the absolute path of the step-ca root CA certificate PEM file.',
+      );
+    }
+
+    // Parse JWK once — do NOT store the raw JSON string as a class field
+    let jwk: JwkKey;
+    try {
+      jwk = JSON.parse(provisionerKeyJson) as JwkKey;
+    } catch (err) {
+      throw new CaServiceError(
+        'STEP_CA_PROVISIONER_KEY_JSON is not valid JSON',
+        'Set STEP_CA_PROVISIONER_KEY_JSON to the JSON-serialised JWK object for the mosaic-fed provisioner.',
+        err,
+      );
+    }
+
+    // Derive algorithm from JWK metadata
+    const jwtAlg = algFromJwk(jwk);
+    const kid = jwk.kid ?? 'mosaic-fed';
+
+    // Import the JWK into a native KeyObject — fail loudly if it cannot be loaded.
+    // We do this synchronously here by calling the async importJWK via a blocking workaround.
+    // Actually importJWK is async, so we store it for use during token building.
+    // We keep the raw jwk object for later async import inside buildOtt.
+    // NOTE: We do NOT store provisionerKeyJson string as a class field.
+    this.jwk = jwk;
+    this.jwtAlg = jwtAlg;
+    this.kid = kid;
+
+    this.caUrl = caUrl;
+    this.rootCertPath = rootCertPath;
+
+    // Read the root cert and pin it for all HTTPS connections.
+    let rootCert: string;
+    try {
+      rootCert = fs.readFileSync(this.rootCertPath, 'utf8');
+    } catch (err) {
+      throw new CaServiceError(
+        `Cannot read STEP_CA_ROOT_CERT_PATH: ${rootCertPath}`,
+        'Ensure the file exists and is readable by the gateway process.',
+        err,
+      );
+    }
+
+    this.httpsAgent = new https.Agent({
+      ca: rootCert,
+      rejectUnauthorized: true,
+    });
+
+    this.logger.log(`CaService initialised — CA URL: ${this.caUrl}`);
+  }
+
+  /**
+   * Lazily import the private key from JWK on first use.
+   * The key is cached in cachedPrivateKey after first import.
+   */
+  private async getPrivateKey(): Promise<crypto.KeyObject> {
+    if (this.cachedPrivateKey !== null) return this.cachedPrivateKey;
+    try {
+      const key = await importJWK(this.jwk, this.jwtAlg);
+      // importJWK returns KeyLike (crypto.KeyObject | Uint8Array) — in Node.js it's KeyObject
+      this.cachedPrivateKey = key as unknown as crypto.KeyObject;
+      return this.cachedPrivateKey;
+    } catch (err) {
+      throw new CaServiceError(
+        'Failed to import STEP_CA_PROVISIONER_KEY_JSON as a cryptographic key',
+        'Ensure STEP_CA_PROVISIONER_KEY_JSON contains a valid JWK private key (EC P-256/P-384 or RSA).',
+        err,
+      );
+    }
+  }
+
+  /**
+   * Build the JWK-provisioner OTT signed with the provisioner private key.
+   * Algorithm is derived from the JWK kty/crv fields.
+   */
+  private async buildOtt(params: {
+    csrPem: string;
+    grantId: string;
+    subjectUserId: string;
+    ttlSeconds: number;
+    csrCn: string;
+  }): Promise<string> {
+    const { csrPem, grantId, subjectUserId, ttlSeconds, csrCn } = params;
+
+    // Validate UUID shape for grant id and subject user id
+    if (!UUID_RE.test(grantId)) {
+      throw new CaServiceError(
+        `grantId is not a valid UUID: ${grantId}`,
+        'Provide a valid UUID (RFC 4122) for grantId.',
+        undefined,
+        'INVALID_GRANT_ID',
+      );
+    }
+    if (!UUID_RE.test(subjectUserId)) {
+      throw new CaServiceError(
+        `subjectUserId is not a valid UUID: ${subjectUserId}`,
+        'Provide a valid UUID (RFC 4122) for subjectUserId.',
+        undefined,
+        'INVALID_GRANT_ID',
+      );
+    }
+
+    const sha = csrFingerprint(csrPem);
+    const now = Math.floor(Date.now() / 1000);
+    const privateKey = await this.getPrivateKey();
+
+    const ott = await new SignJWT({
+      iss: this.kid,
+      sub: csrCn, // M1: set sub to identity from CSR CN
+      aud: [`${this.caUrl}/1.0/sign`],
+      iat: now,
+      nbf: now - 30, // 30 s clock-skew tolerance
+      exp: now + Math.min(ttlSeconds, 3600), // OTT validity ≤ 1 h
+      jti: crypto.randomUUID(), // M2: unique token ID
+      // step.sha is the canonical field name used in the template — M3: keep only step.sha
+      step: { sha },
+      // Mosaic custom claims consumed by federation.tpl
+      mosaic_grant_id: grantId,
+      mosaic_subject_user_id: subjectUserId,
+    })
+      .setProtectedHeader({ alg: this.jwtAlg, typ: 'JWT', kid: this.kid })
+      .sign(privateKey);
+
+    return ott;
+  }
+
+  /**
+   * Validate a PEM-encoded CSR using @peculiar/x509.
+   * Verifies the self-signature, key type/size, and signature algorithm.
+   * Optionally verifies that the CSR's SANs match the expected set.
+   *
+   * Throws CaServiceError with code 'INVALID_CSR' on failure.
+   */
+  private async validateCsr(pem: string, expectedSans?: string[]): Promise<string> {
+    let csr: Pkcs10CertificateRequest;
+    try {
+      csr = new Pkcs10CertificateRequest(pem);
+    } catch (err) {
+      throw new CaServiceError(
+        'Failed to parse CSR PEM as a valid PKCS#10 certificate request',
+        'Provide a valid PEM-encoded PKCS#10 CSR.',
+        err,
+        'INVALID_CSR',
+      );
+    }
+
+    // Verify self-signature
+    let valid: boolean;
+    try {
+      valid = await csr.verify();
+    } catch (err) {
+      throw new CaServiceError(
+        'CSR signature verification threw an error',
+        'The CSR self-signature could not be verified. Ensure the CSR is properly formed.',
+        err,
+        'INVALID_CSR',
+      );
+    }
+    if (!valid) {
+      throw new CaServiceError(
+        'CSR self-signature is invalid',
+        'The CSR must be self-signed with the corresponding private key.',
+        undefined,
+        'INVALID_CSR',
+      );
+    }
+
+    // Validate signature algorithm — reject MD5 and SHA-1
+    // signatureAlgorithm is HashedAlgorithm which extends Algorithm.
+    // Cast through unknown to access .name and .hash.name without DOM lib globals.
+    const sigAlgAny = csr.signatureAlgorithm as unknown as {
+      name?: string;
+      hash?: { name?: string };
+    };
+    const sigAlgName = (sigAlgAny.name ?? '').toLowerCase();
+    const hashName = (sigAlgAny.hash?.name ?? '').toLowerCase();
+    if (
+      sigAlgName.includes('md5') ||
+      sigAlgName.includes('sha1') ||
+      hashName === 'sha-1' ||
+      hashName === 'sha1'
+    ) {
+      throw new CaServiceError(
+        `CSR uses a forbidden signature algorithm: ${sigAlgAny.name ?? 'unknown'}`,
+        'Use SHA-256 or stronger. MD5 and SHA-1 are not permitted.',
+        undefined,
+        'INVALID_CSR',
+      );
+    }
+
+    // Validate public key algorithm and strength via the algorithm descriptor on the key.
+    // csr.publicKey.algorithm is type Algorithm (WebCrypto) — use name-based checks.
+    // We cast to an extended interface to access curve/modulus info without DOM globals.
+    const pubKeyAlgo = csr.publicKey.algorithm as {
+      name: string;
+      namedCurve?: string;
+      modulusLength?: number;
+    };
+    const keyAlgoName = pubKeyAlgo.name;
+
+    if (keyAlgoName === 'RSASSA-PKCS1-v1_5' || keyAlgoName === 'RSA-PSS') {
+      const modulusLength = pubKeyAlgo.modulusLength ?? 0;
+      if (modulusLength < 2048) {
+        throw new CaServiceError(
+          `CSR RSA key is too short: ${modulusLength} bits (minimum 2048)`,
+          'Use an RSA key of at least 2048 bits.',
+          undefined,
+          'INVALID_CSR',
+        );
+      }
+    } else if (keyAlgoName === 'ECDSA') {
+      const namedCurve = pubKeyAlgo.namedCurve ?? '';
+      const allowedCurves = new Set(['P-256', 'P-384']);
+      if (!allowedCurves.has(namedCurve)) {
+        throw new CaServiceError(
+          `CSR EC key uses disallowed curve: ${namedCurve}`,
+          'Use EC P-256 or P-384. Other curves are not permitted.',
+          undefined,
+          'INVALID_CSR',
+        );
+      }
+    } else if (keyAlgoName === 'Ed25519') {
+      // Ed25519 is explicitly allowed
+    } else {
+      throw new CaServiceError(
+        `CSR uses unsupported key algorithm: ${keyAlgoName}`,
+        'Use EC (P-256/P-384), Ed25519, or RSA (≥2048 bit) keys.',
+        undefined,
+        'INVALID_CSR',
+      );
+    }
+
+    // Extract SANs if expectedSans provided
+    if (expectedSans && expectedSans.length > 0) {
+      // Get SANs from CSR extensions
+      const sanExtension = csr.extensions?.find(
+        (ext) => ext.type === '2.5.29.17', // Subject Alternative Name OID
+      );
+      const csrSans: string[] = [];
+      if (sanExtension) {
+        // Parse the raw SAN extension — store as stringified for comparison
+        // @peculiar/x509 exposes SANs through the parsed extension
+        const sanExt = sanExtension as { names?: Array<{ type: string; value: string }> };
+        if (sanExt.names) {
+          for (const name of sanExt.names) {
+            csrSans.push(name.value);
+          }
+        }
+      }
+
+      const csrSanSet = new Set(csrSans);
+      const expectedSanSet = new Set(expectedSans);
+      const missing = expectedSans.filter((s) => !csrSanSet.has(s));
+      const extra = csrSans.filter((s) => !expectedSanSet.has(s));
+
+      if (missing.length > 0 || extra.length > 0) {
+        throw new CaServiceError(
+          `CSR SANs do not match expected set. Missing: [${missing.join(', ')}], Extra: [${extra.join(', ')}]`,
+          'The CSR must include exactly the SANs specified in the issuance request.',
+          undefined,
+          'INVALID_CSR',
+        );
+      }
+    }
+
+    // Return the CN from the CSR subject for use as JWT sub
+    const cn = csr.subjectName.getField('CN')?.[0] ?? '';
+    return cn;
+  }
+
+  /**
+   * Submit a CSR to step-ca and return the issued certificate.
+   *
+   * Throws `CaServiceError` on any failure (network, auth, malformed input).
+   * Never silently swallows errors — fail-loud is a hard contract per M2-02 review.
+   */
+  async issueCert(req: IssueCertRequestDto): Promise<IssuedCertDto> {
+    // Clamp TTL to 15-minute maximum (H2)
+    const ttl = Math.min(req.ttlSeconds ?? 300, 900);
+
+    this.logger.debug(
+      `issueCert — grantId=${req.grantId} subjectUserId=${req.subjectUserId} ttl=${ttl}s`,
+    );
+
+    // Validate CSR — real cryptographic validation (H3)
+    const csrCn = await this.validateCsr(req.csrPem);
+
+    const ott = await this.buildOtt({
+      csrPem: req.csrPem,
+      grantId: req.grantId,
+      subjectUserId: req.subjectUserId,
+      ttlSeconds: ttl,
+      csrCn,
+    });
+
+    const signUrl = `${this.caUrl}/1.0/sign`;
+    const requestBody = {
+      csr: req.csrPem,
+      ott,
+      validity: {
+        duration: `${ttl}s`,
+      },
+    };
+
+    this.logger.debug(`Posting CSR to ${signUrl}`);
+    const response = await httpsPost(signUrl, requestBody, this.httpsAgent);
+
+    if (!response.crt) {
+      throw new CaServiceError(
+        'step-ca sign response missing the "crt" field',
+        'This is unexpected — the step-ca instance may be misconfigured or running an incompatible version.',
+      );
+    }
+
+    // Build certChainPem: prefer certChain array, fall back to ca field, fall back to crt alone.
+    let certChainPem: string;
+    if (response.certChain && response.certChain.length > 0) {
+      certChainPem = response.certChain.join('\n');
+    } else if (response.ca) {
+      certChainPem = response.crt + '\n' + response.ca;
+    } else {
+      certChainPem = response.crt;
+    }
+
+    const serialNumber = extractSerial(response.crt);
+
+    // CRIT-1: Verify the issued certificate contains both Mosaic OID extensions
+    // with the correct values. Step-CA's federation.tpl encodes each as an ASN.1
+    // UTF8String TLV: tag 0x0C + 1-byte length + UUID bytes. We skip 2 bytes
+    // (tag + length) to extract the raw UUID string.
+    const issuedCert = new X509Certificate(response.crt);
+    const decoder = new TextDecoder();
+
+    const grantIdExt = issuedCert.getExtension('1.3.6.1.4.1.99999.1');
+    if (!grantIdExt) {
+      throw new CaServiceError(
+        'Issued certificate is missing required Mosaic OID: mosaic_grant_id',
+        'The Step-CA federation.tpl template did not embed OID 1.3.6.1.4.1.99999.1. Check the provisioner template configuration.',
+        undefined,
+        'OID_MISSING',
+      );
+    }
+    const grantIdInCert = decoder.decode(grantIdExt.value.slice(2));
+    if (grantIdInCert !== req.grantId) {
+      throw new CaServiceError(
+        `Issued certificate mosaic_grant_id mismatch: expected ${req.grantId}, got ${grantIdInCert}`,
+        'The Step-CA issued a certificate with a different grant ID than requested. This may indicate a provisioner misconfiguration or a MITM.',
+        undefined,
+        'OID_MISMATCH',
+      );
+    }
+
+    const subjectUserIdExt = issuedCert.getExtension('1.3.6.1.4.1.99999.2');
+    if (!subjectUserIdExt) {
+      throw new CaServiceError(
+        'Issued certificate is missing required Mosaic OID: mosaic_subject_user_id',
+        'The Step-CA federation.tpl template did not embed OID 1.3.6.1.4.1.99999.2. Check the provisioner template configuration.',
+        undefined,
+        'OID_MISSING',
+      );
+    }
+    const subjectUserIdInCert = decoder.decode(subjectUserIdExt.value.slice(2));
+    if (subjectUserIdInCert !== req.subjectUserId) {
+      throw new CaServiceError(
+        `Issued certificate mosaic_subject_user_id mismatch: expected ${req.subjectUserId}, got ${subjectUserIdInCert}`,
+        'The Step-CA issued a certificate with a different subject user ID than requested. This may indicate a provisioner misconfiguration or a MITM.',
+        undefined,
+        'OID_MISMATCH',
+      );
+    }
+
+    this.logger.log(`Certificate issued — serial=${serialNumber} grantId=${req.grantId}`);
+
+    const result = new IssuedCertDto();
+    result.certPem = response.crt;
+    result.certChainPem = certChainPem;
+    result.serialNumber = serialNumber;
+    return result;
+  }
+}

apps/gateway/src/federation/client/__tests__/federation-client.service.spec.ts

@@ -0,0 +1,553 @@
+/**
+ * Unit tests for FederationClientService (FED-M3-08).
+ *
+ * HTTP mocking strategy:
+ *   undici MockAgent is used to intercept outbound HTTP requests.  The service
+ *   uses `undici.fetch` with a `dispatcher` option, so MockAgent is set as the
+ *   global dispatcher and all requests flow through it.
+ *
+ *   Because the service builds one `undici.Agent` per peer and passes it as
+ *   the dispatcher on every fetch call, we cannot intercept at the Agent level
+ *   in unit tests without significant refactoring.  Instead, we set the global
+ *   dispatcher to a MockAgent and override the service's `doRequest` indirection
+ *   by spying on the internal fetch call.
+ *
+ *   For the cert/key wiring, we use the real `sealClientKey` function from
+ *   peer-key.util.ts with a test secret — no stubs.
+ *
+ * Sealed-key setup:
+ *   Each test (or beforeAll) calls `sealClientKey(TEST_PRIVATE_KEY_PEM)` with
+ *   BETTER_AUTH_SECRET set to a deterministic test value so that
+ *   `unsealClientKey` in the service recovers the original PEM.
+ */
+
+import 'reflect-metadata';
+import { describe, it, expect, vi, beforeEach, afterEach, beforeAll, afterAll } from 'vitest';
+import { MockAgent, setGlobalDispatcher, getGlobalDispatcher } from 'undici';
+import type { Dispatcher } from 'undici';
+import { writeFileSync, unlinkSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import type { Db } from '@mosaicstack/db';
+import { FederationClientService, FederationClientError } from '../federation-client.service.js';
+import { sealClientKey } from '../../peer-key.util.js';
+
+// ---------------------------------------------------------------------------
+// Test constants
+// ---------------------------------------------------------------------------
+
+const TEST_SECRET = 'test-secret-for-federation-client-spec-only';
+const PEER_ID = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa';
+const ENDPOINT = 'https://peer.example.com';
+
+// Minimal valid RSA/EC private key PEM — does NOT need to be a real key for
+// unit tests because we only verify it round-trips through seal/unseal, not
+// that it actually negotiates TLS (MockAgent handles that).
+const TEST_PRIVATE_KEY_PEM = `-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDummyKeyForTests
+-----END PRIVATE KEY-----`;
+
+// Minimal self-signed cert PEM (dummy — only used for mTLS Agent construction)
+const TEST_CERT_PEM = `-----BEGIN CERTIFICATE-----
+MIIBdummyCertForFederationClientTests==
+-----END CERTIFICATE-----`;
+
+const TEST_CERT_SERIAL = 'ABCDEF1234567890';
+
+// ---------------------------------------------------------------------------
+// Sealed key (computed once in beforeAll)
+// ---------------------------------------------------------------------------
+
+let SEALED_KEY: string;
+
+// Path to a stub Step-CA root cert file written in beforeAll. The cert is never
+// actually used to negotiate TLS in unit tests (MockAgent + spy on resolveEntry
+// short-circuit the network), but loadStepCaRoot() requires the file to exist.
+const STUB_CA_PEM_PATH = join(tmpdir(), 'federation-client-spec-ca.pem');
+const STUB_CA_PEM = `-----BEGIN CERTIFICATE-----
+MIIBdummyCAforFederationClientSpecOnly==
+-----END CERTIFICATE-----
+`;
+
+// ---------------------------------------------------------------------------
+// Peer row factory
+// ---------------------------------------------------------------------------
+
+function makePeerRow(overrides: Partial<Record<string, unknown>> = {}) {
+  return {
+    id: PEER_ID,
+    commonName: 'peer-example-com',
+    displayName: 'Test Peer',
+    certPem: TEST_CERT_PEM,
+    certSerial: TEST_CERT_SERIAL,
+    certNotAfter: new Date('2030-01-01T00:00:00Z'),
+    clientKeyPem: SEALED_KEY,
+    state: 'active' as const,
+    endpointUrl: ENDPOINT,
+    lastSeenAt: null,
+    createdAt: new Date('2026-01-01T00:00:00Z'),
+    revokedAt: null,
+    ...overrides,
+  };
+}
+
+// ---------------------------------------------------------------------------
+// Mock DB builder
+// ---------------------------------------------------------------------------
+
+function makeDb(selectRows: unknown[] = [makePeerRow()]): Db {
+  const limitSelect = vi.fn().mockResolvedValue(selectRows);
+  const whereSelect = vi.fn().mockReturnValue({ limit: limitSelect });
+  const fromSelect = vi.fn().mockReturnValue({ where: whereSelect });
+  const selectMock = vi.fn().mockReturnValue({ from: fromSelect });
+
+  return {
+    select: selectMock,
+    insert: vi.fn(),
+    update: vi.fn(),
+    delete: vi.fn(),
+    transaction: vi.fn(),
+  } as unknown as Db;
+}
+
+// ---------------------------------------------------------------------------
+// Helpers for MockAgent HTTP interception
+// ---------------------------------------------------------------------------
+
+/**
+ * Create a MockAgent + MockPool for the peer endpoint, set it as the global
+ * dispatcher, and return both for per-test configuration.
+ */
+function makeMockAgent() {
+  const mockAgent = new MockAgent({ connections: 1 });
+  mockAgent.disableNetConnect();
+  setGlobalDispatcher(mockAgent);
+  const pool = mockAgent.get(ENDPOINT);
+  return { mockAgent, pool };
+}
+
+/**
+ * Build a FederationClientService with a mock DB and a spy on the internal
+ * fetch so we can intercept at the HTTP layer via MockAgent.
+ *
+ * The service calls `fetch(url, { dispatcher: agent })` where `agent` is the
+ * mTLS undici.Agent built from the peer's cert+key.  To make MockAgent work,
+ * we need the fetch dispatcher to be the MockAgent, not the per-peer Agent.
+ *
+ * Strategy: we replace the private `resolveEntry` result's `agent` field with
+ * the MockAgent's pool, so fetch uses our interceptor.  We do this by spying
+ * on `resolveEntry` and returning a controlled entry.
+ */
+function makeService(db: Db, mockPool: Dispatcher): FederationClientService {
+  const svc = new FederationClientService(db);
+
+  // Override resolveEntry to inject MockAgent pool as the dispatcher
+  vi.spyOn(
+    svc as unknown as { resolveEntry: (peerId: string) => Promise<unknown> },
+    'resolveEntry',
+  ).mockImplementation(async (_peerId: string) => {
+    // Still call DB (via the real logic) to exercise peer validation,
+    // but return mock pool as the agent.
+    // For simplicity in unit tests, directly return a controlled entry.
+    return {
+      agent: mockPool,
+      endpointUrl: ENDPOINT,
+      certPem: TEST_CERT_PEM,
+      certSerial: TEST_CERT_SERIAL,
+    };
+  });
+
+  return svc;
+}
+
+// ---------------------------------------------------------------------------
+// Test setup
+// ---------------------------------------------------------------------------
+
+let originalDispatcher: Dispatcher;
+
+beforeAll(() => {
+  // Seal the test key once — requires BETTER_AUTH_SECRET
+  const saved = process.env['BETTER_AUTH_SECRET'];
+  process.env['BETTER_AUTH_SECRET'] = TEST_SECRET;
+  try {
+    SEALED_KEY = sealClientKey(TEST_PRIVATE_KEY_PEM);
+  } finally {
+    if (saved === undefined) {
+      delete process.env['BETTER_AUTH_SECRET'];
+    } else {
+      process.env['BETTER_AUTH_SECRET'] = saved;
+    }
+  }
+  writeFileSync(STUB_CA_PEM_PATH, STUB_CA_PEM, 'utf8');
+});
+
+afterAll(() => {
+  try {
+    unlinkSync(STUB_CA_PEM_PATH);
+  } catch {
+    // best-effort cleanup
+  }
+});
+
+beforeEach(() => {
+  originalDispatcher = getGlobalDispatcher();
+  process.env['BETTER_AUTH_SECRET'] = TEST_SECRET;
+  process.env['STEP_CA_ROOT_CERT_PATH'] = STUB_CA_PEM_PATH;
+});
+
+afterEach(() => {
+  setGlobalDispatcher(originalDispatcher);
+  vi.restoreAllMocks();
+  delete process.env['BETTER_AUTH_SECRET'];
+  delete process.env['STEP_CA_ROOT_CERT_PATH'];
+});
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+/** Successful list response body */
+const LIST_BODY = {
+  items: [{ id: '1', title: 'Task One' }],
+  nextCursor: undefined,
+  _partial: false,
+};
+
+/** Successful get response body */
+const GET_BODY = {
+  item: { id: '1', title: 'Task One' },
+  _partial: false,
+};
+
+/** Successful capabilities response body */
+const CAP_BODY = {
+  resources: ['tasks'],
+  excluded_resources: [],
+  max_rows_per_query: 100,
+  supported_verbs: ['list', 'get', 'capabilities'] as const,
+};
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+describe('FederationClientService', () => {
+  // ─── Successful verb calls ─────────────────────────────────────────────────
+
+  describe('list()', () => {
+    it('returns parsed typed response on success', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool
+        .intercept({
+          path: '/api/federation/v1/list/tasks',
+          method: 'POST',
+        })
+        .reply(200, LIST_BODY, { headers: { 'content-type': 'application/json' } });
+
+      const result = await svc.list(PEER_ID, 'tasks', {});
+
+      expect(result.items).toHaveLength(1);
+      expect(result.items[0]).toMatchObject({ id: '1', title: 'Task One' });
+
+      await mockAgent.close();
+    });
+  });
+
+  describe('get()', () => {
+    it('returns parsed typed response on success', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool
+        .intercept({
+          path: '/api/federation/v1/get/tasks/1',
+          method: 'POST',
+        })
+        .reply(200, GET_BODY, { headers: { 'content-type': 'application/json' } });
+
+      const result = await svc.get(PEER_ID, 'tasks', '1', {});
+
+      expect(result.item).toMatchObject({ id: '1', title: 'Task One' });
+
+      await mockAgent.close();
+    });
+  });
+
+  describe('capabilities()', () => {
+    it('returns parsed capabilities response on success', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool
+        .intercept({
+          path: '/api/federation/v1/capabilities',
+          method: 'GET',
+        })
+        .reply(200, CAP_BODY, { headers: { 'content-type': 'application/json' } });
+
+      const result = await svc.capabilities(PEER_ID);
+
+      expect(result.resources).toContain('tasks');
+      expect(result.max_rows_per_query).toBe(100);
+
+      await mockAgent.close();
+    });
+  });
+
+  // ─── HTTP error surfaces ──────────────────────────────────────────────────
+
+  describe('non-2xx responses', () => {
+    it('surfaces 403 as FederationClientError({ status: 403, code: "FORBIDDEN" })', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool.intercept({ path: '/api/federation/v1/list/tasks', method: 'POST' }).reply(
+        403,
+        { error: { code: 'forbidden', message: 'Access denied' } },
+        {
+          headers: { 'content-type': 'application/json' },
+        },
+      );
+
+      await expect(svc.list(PEER_ID, 'tasks', {})).rejects.toMatchObject({
+        status: 403,
+        code: 'FORBIDDEN',
+        peerId: PEER_ID,
+      });
+
+      await mockAgent.close();
+    });
+
+    it('surfaces 404 as FederationClientError({ status: 404, code: "HTTP_404" })', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool.intercept({ path: '/api/federation/v1/get/tasks/999', method: 'POST' }).reply(
+        404,
+        { error: { code: 'not_found', message: 'Not found' } },
+        {
+          headers: { 'content-type': 'application/json' },
+        },
+      );
+
+      await expect(svc.get(PEER_ID, 'tasks', '999', {})).rejects.toMatchObject({
+        status: 404,
+        code: 'HTTP_404',
+        peerId: PEER_ID,
+      });
+
+      await mockAgent.close();
+    });
+  });
+
+  // ─── Network error ─────────────────────────────────────────────────────────
+
+  describe('network errors', () => {
+    it('surfaces network error as FederationClientError({ code: "NETWORK" })', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool
+        .intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
+        .replyWithError(new Error('ECONNREFUSED'));
+
+      await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
+        code: 'NETWORK',
+        peerId: PEER_ID,
+      });
+
+      await mockAgent.close();
+    });
+  });
+
+  // ─── Invalid response body ─────────────────────────────────────────────────
+
+  describe('invalid response body', () => {
+    it('surfaces as FederationClientError({ code: "INVALID_RESPONSE" }) when body shape is wrong', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      // capabilities returns wrong shape (missing required fields)
+      pool
+        .intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
+        .reply(200, { totally: 'wrong' }, { headers: { 'content-type': 'application/json' } });
+
+      await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
+        code: 'INVALID_RESPONSE',
+        peerId: PEER_ID,
+      });
+
+      await mockAgent.close();
+    });
+  });
+
+  // ─── Peer DB validation ────────────────────────────────────────────────────
+
+  describe('peer validation (without resolveEntry spy)', () => {
+    /**
+     * These tests exercise the real `resolveEntry` path — no spy on resolveEntry.
+     */
+
+    it('throws PEER_NOT_FOUND when peer is not in DB', async () => {
+      // DB returns empty array (peer not found)
+      const db = makeDb([]);
+      const svc = new FederationClientService(db);
+
+      await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
+        code: 'PEER_NOT_FOUND',
+        peerId: PEER_ID,
+      });
+    });
+
+    it('throws PEER_INACTIVE when peer state is not "active"', async () => {
+      const db = makeDb([makePeerRow({ state: 'suspended' })]);
+      const svc = new FederationClientService(db);
+
+      await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
+        code: 'PEER_INACTIVE',
+        peerId: PEER_ID,
+      });
+    });
+  });
+
+  // ─── Cache behaviour ───────────────────────────────────────────────────────
+
+  describe('cache behaviour', () => {
+    it('hits cache on second call — only one DB lookup happens', async () => {
+      // Verify cache by calling the private resolveEntry directly twice and
+      // asserting the DB was queried only once. This avoids the HTTP layer,
+      // which would require either a real network or per-peer Agent rewiring
+      // that the cache invariant doesn't depend on.
+      const db = makeDb();
+      const selectSpy = vi.spyOn(db, 'select');
+      const svc = new FederationClientService(db);
+      const resolveEntry = (
+        svc as unknown as { resolveEntry: (peerId: string) => Promise<unknown> }
+      ).resolveEntry.bind(svc);
+
+      const first = await resolveEntry(PEER_ID);
+      const second = await resolveEntry(PEER_ID);
+
+      expect(first).toBe(second);
+      expect(selectSpy).toHaveBeenCalledTimes(1);
+    });
+
+    it('serializes concurrent resolveEntry calls — only one DB lookup', async () => {
+      const db = makeDb();
+      const selectSpy = vi.spyOn(db, 'select');
+      const svc = new FederationClientService(db);
+      const resolveEntry = (
+        svc as unknown as {
+          resolveEntry: (peerId: string) => Promise<unknown>;
+        }
+      ).resolveEntry.bind(svc);
+
+      const [a, b] = await Promise.all([resolveEntry(PEER_ID), resolveEntry(PEER_ID)]);
+      expect(a).toBe(b);
+      expect(selectSpy).toHaveBeenCalledTimes(1);
+    });
+
+    it('flushPeer destroys the evicted Agent so old TLS connections close', async () => {
+      const db = makeDb();
+      const svc = new FederationClientService(db);
+      const resolveEntry = (
+        svc as unknown as {
+          resolveEntry: (peerId: string) => Promise<{ agent: { destroy: () => Promise<void> } }>;
+        }
+      ).resolveEntry.bind(svc);
+
+      const entry = await resolveEntry(PEER_ID);
+      const destroySpy = vi.spyOn(entry.agent, 'destroy').mockResolvedValue();
+
+      svc.flushPeer(PEER_ID);
+      expect(destroySpy).toHaveBeenCalledTimes(1);
+    });
+
+    it('flushPeer() invalidates cache — next call re-reads DB', async () => {
+      const db = makeDb();
+      const { mockAgent, pool } = makeMockAgent();
+      const svc = makeService(db, pool);
+
+      pool
+        .intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
+        .reply(200, CAP_BODY, { headers: { 'content-type': 'application/json' } })
+        .times(2);
+
+      // First call — populates cache (via mock resolveEntry)
+      await svc.capabilities(PEER_ID);
+
+      // Flush the cache
+      svc.flushPeer(PEER_ID);
+
+      // The spy on resolveEntry is still active — check it's called again after flush
+      const resolveEntrySpy = vi.spyOn(
+        svc as unknown as { resolveEntry: (peerId: string) => Promise<unknown> },
+        'resolveEntry',
+      );
+
+      // Second call after flush — should call resolveEntry again
+      await svc.capabilities(PEER_ID);
+
+      // resolveEntry should have been called once after we started spying (post-flush)
+      expect(resolveEntrySpy).toHaveBeenCalledTimes(1);
+
+      await mockAgent.close();
+    });
+  });
+
+  // ─── loadStepCaRoot env-var guard ─────────────────────────────────────────
+
+  describe('loadStepCaRoot() env-var guard', () => {
+    it('throws PEER_MISCONFIGURED when STEP_CA_ROOT_CERT_PATH is not set', async () => {
+      delete process.env['STEP_CA_ROOT_CERT_PATH'];
+      const db = makeDb();
+      const svc = new FederationClientService(db);
+      const resolveEntry = (
+        svc as unknown as {
+          resolveEntry: (peerId: string) => Promise<unknown>;
+        }
+      ).resolveEntry.bind(svc);
+
+      await expect(resolveEntry(PEER_ID)).rejects.toMatchObject({
+        code: 'PEER_MISCONFIGURED',
+      });
+    });
+  });
+
+  // ─── FederationClientError class ──────────────────────────────────────────
+
+  describe('FederationClientError', () => {
+    it('is instanceof Error and FederationClientError', () => {
+      const err = new FederationClientError({
+        code: 'PEER_NOT_FOUND',
+        message: 'test',
+        peerId: PEER_ID,
+      });
+      expect(err).toBeInstanceOf(Error);
+      expect(err).toBeInstanceOf(FederationClientError);
+      expect(err.name).toBe('FederationClientError');
+    });
+
+    it('carries status, code, and peerId', () => {
+      const err = new FederationClientError({
+        status: 403,
+        code: 'FORBIDDEN',
+        message: 'forbidden',
+        peerId: PEER_ID,
+      });
+      expect(err.status).toBe(403);
+      expect(err.code).toBe('FORBIDDEN');
+      expect(err.peerId).toBe(PEER_ID);
+    });
+  });
+});

apps/gateway/src/federation/client/__tests__/query-source.service.spec.ts

@@ -0,0 +1,255 @@
+import 'reflect-metadata';
+import { describe, expect, it, vi } from 'vitest';
+import type { Db } from '@mosaicstack/db';
+import type { FederationListResponse } from '@mosaicstack/types';
+import {
+  FederationClientError,
+  type FederationClientService,
+} from '../federation-client.service.js';
+import { type QuerySourceError, QuerySourceService } from '../query-source.service.js';
+
+interface TestRow {
+  id: string;
+  title: string;
+}
+
+interface PeerRow {
+  id: string;
+  commonName: string;
+  endpointUrl: string | null;
+  clientKeyPem: string | null;
+  state: 'active' | 'pending' | 'suspended' | 'revoked';
+}
+
+const LOCAL_ROWS: TestRow[] = [
+  { id: 'local-1', title: 'Local One' },
+  { id: 'local-2', title: 'Local Two' },
+];
+
+const PEER_A: PeerRow = {
+  id: 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa',
+  commonName: 'peer-a',
+  endpointUrl: 'https://peer-a.example.com',
+  clientKeyPem: 'sealed-key-a',
+  state: 'active',
+};
+
+const PEER_B: PeerRow = {
+  id: 'bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb',
+  commonName: 'peer-b',
+  endpointUrl: 'https://peer-b.example.com',
+  clientKeyPem: 'sealed-key-b',
+  state: 'active',
+};
+
+const PEER_LOCALHOST: PeerRow = {
+  id: 'cccccccc-cccc-cccc-cccc-cccccccccccc',
+  commonName: 'peer-localhost',
+  endpointUrl: 'https://localhost:3001',
+  clientKeyPem: 'sealed-key-c',
+  state: 'active',
+};
+
+function makeDb(activePeers: PeerRow[]): Db {
+  const orderBy = vi.fn().mockResolvedValue(activePeers);
+  const where = vi.fn().mockReturnValue({ orderBy });
+  const from = vi.fn().mockReturnValue({ where });
+  const select = vi.fn().mockReturnValue({ from });
+
+  return {
+    select,
+    insert: vi.fn(),
+    update: vi.fn(),
+    delete: vi.fn(),
+    transaction: vi.fn(),
+  } as unknown as Db;
+}
+
+function makeFederationClient(
+  list: (
+    peerId: string,
+    resource: string,
+    request: Record<string, unknown>,
+  ) => Promise<FederationListResponse<TestRow>>,
+): FederationClientService {
+  return {
+    list: list as unknown as FederationClientService['list'],
+  } as FederationClientService;
+}
+
+function makeLocalResponse(rows: TestRow[] = LOCAL_ROWS): Promise<FederationListResponse<TestRow>> {
+  return Promise.resolve({ items: rows });
+}
+
+describe('QuerySourceService', () => {
+  it('routes source="local" to the local executor and tags rows as local', async () => {
+    const list = vi.fn(async (): Promise<FederationListResponse<TestRow>> => ({ items: [] }));
+    const service = new QuerySourceService(makeDb([PEER_A]), makeFederationClient(list));
+
+    const result = await service.list<TestRow>({
+      source: 'local',
+      resource: 'tasks',
+      request: { cursor: 'ignored-for-local-test' },
+      local: () => makeLocalResponse(),
+    });
+
+    expect(result).toEqual({
+      items: [
+        { id: 'local-1', title: 'Local One', _source: 'local' },
+        { id: 'local-2', title: 'Local Two', _source: 'local' },
+      ],
+    });
+    expect(list).not.toHaveBeenCalled();
+  });
+
+  it('routes source="federated:<host>" to the matching active peer and tags rows with peer commonName', async () => {
+    const list = vi.fn(
+      async (): Promise<FederationListResponse<TestRow>> => ({
+        items: [{ id: 'remote-1', title: 'Remote One' }],
+      }),
+    );
+    const service = new QuerySourceService(makeDb([PEER_A, PEER_B]), makeFederationClient(list));
+
+    const result = await service.list<TestRow>({
+      source: 'federated:peer-b.example.com',
+      resource: 'tasks',
+      request: { status: 'open' },
+      local: () => makeLocalResponse(),
+    });
+
+    expect(result).toEqual({
+      items: [{ id: 'remote-1', title: 'Remote One', _source: 'peer-b' }],
+    });
+    expect(list).toHaveBeenCalledWith(PEER_B.id, 'tasks', { status: 'open' });
+  });
+
+  it('matches federated hosts by endpoint host including non-default port', async () => {
+    const list = vi.fn(
+      async (): Promise<FederationListResponse<TestRow>> => ({
+        items: [{ id: 'remote-port', title: 'Remote Port' }],
+      }),
+    );
+    const service = new QuerySourceService(makeDb([PEER_LOCALHOST]), makeFederationClient(list));
+
+    const result = await service.list<TestRow>({
+      source: 'federated:localhost:3001',
+      resource: 'tasks',
+      request: {},
+      local: () => makeLocalResponse(),
+    });
+
+    expect(result).toEqual({
+      items: [{ id: 'remote-port', title: 'Remote Port', _source: 'peer-localhost' }],
+    });
+    expect(list).toHaveBeenCalledWith(PEER_LOCALHOST.id, 'tasks', {});
+  });
+
+  it('fans out source="all" to local plus every active outbound peer in parallel and merges tagged rows', async () => {
+    const callOrder: string[] = [];
+    const list = vi.fn(async (peerId: string): Promise<FederationListResponse<TestRow>> => {
+      callOrder.push(`remote-start:${peerId}`);
+      await Promise.resolve();
+      return {
+        items: [{ id: `remote-${peerId.slice(0, 1)}`, title: `Remote ${peerId.slice(0, 1)}` }],
+      };
+    });
+    const service = new QuerySourceService(makeDb([PEER_A, PEER_B]), makeFederationClient(list));
+
+    const result = await service.list<TestRow>({
+      source: 'all',
+      resource: 'tasks',
+      request: { limit: 25 },
+      local: async () => {
+        callOrder.push('local-start');
+        await Promise.resolve();
+        return { items: [{ id: 'local-1', title: 'Local One' }] };
+      },
+    });
+
+    expect(result).toEqual({
+      items: [
+        { id: 'local-1', title: 'Local One', _source: 'local' },
+        { id: 'remote-a', title: 'Remote a', _source: 'peer-a' },
+        { id: 'remote-b', title: 'Remote b', _source: 'peer-b' },
+      ],
+    });
+    expect(list).toHaveBeenCalledTimes(2);
+    expect(callOrder).toEqual([
+      'local-start',
+      `remote-start:${PEER_A.id}`,
+      `remote-start:${PEER_B.id}`,
+    ]);
+  });
+
+  it('marks source="all" as partial and truncated when any subquery returns a cursor', async () => {
+    const list = vi.fn(
+      async (): Promise<FederationListResponse<TestRow>> => ({
+        items: [{ id: 'remote-a', title: 'Remote A' }],
+        nextCursor: 'remote-next',
+      }),
+    );
+    const service = new QuerySourceService(makeDb([PEER_A]), makeFederationClient(list));
+
+    const result = await service.list<TestRow>({
+      source: 'all',
+      resource: 'tasks',
+      request: {},
+      local: () => makeLocalResponse([{ id: 'local-1', title: 'Local One' }]),
+    });
+
+    expect(result).toEqual({
+      items: [
+        { id: 'local-1', title: 'Local One', _source: 'local' },
+        { id: 'remote-a', title: 'Remote A', _source: 'peer-a' },
+      ],
+      _partial: true,
+      _truncated: true,
+    });
+  });
+
+  it('returns _partial=true for source="all" when one peer fails without dropping successful sources', async () => {
+    const list = vi.fn(async (peerId: string): Promise<FederationListResponse<TestRow>> => {
+      if (peerId === PEER_B.id) {
+        throw new FederationClientError({
+          code: 'NETWORK',
+          message: 'peer unavailable',
+          peerId,
+        });
+      }
+      return { items: [{ id: 'remote-a', title: 'Remote A' }] };
+    });
+    const service = new QuerySourceService(makeDb([PEER_A, PEER_B]), makeFederationClient(list));
+
+    const result = await service.list<TestRow>({
+      source: 'all',
+      resource: 'tasks',
+      request: {},
+      local: () => makeLocalResponse([{ id: 'local-1', title: 'Local One' }]),
+    });
+
+    expect(result).toEqual({
+      items: [
+        { id: 'local-1', title: 'Local One', _source: 'local' },
+        { id: 'remote-a', title: 'Remote A', _source: 'peer-a' },
+      ],
+      _partial: true,
+    });
+  });
+
+  it('throws QuerySourceError when a federated host does not match an active outbound peer', async () => {
+    const list = vi.fn(async (): Promise<FederationListResponse<TestRow>> => ({ items: [] }));
+    const service = new QuerySourceService(makeDb([PEER_A]), makeFederationClient(list));
+
+    await expect(
+      service.list<TestRow>({
+        source: 'federated:missing.example.com',
+        resource: 'tasks',
+        request: {},
+        local: () => makeLocalResponse(),
+      }),
+    ).rejects.toMatchObject({
+      name: 'QuerySourceError',
+      code: 'PEER_NOT_FOUND',
+    } satisfies Partial<QuerySourceError>);
+  });
+});

apps/gateway/src/federation/client/federation-client.service.ts

@@ -0,0 +1,500 @@
+/**
+ * FederationClientService — outbound mTLS client for federation requests (FED-M3-08).
+ *
+ * Dials peer gateways over mTLS using the cert+sealed-key stored in `federation_peers`,
+ * invokes federation verbs (list / get / capabilities), and surfaces all failure modes
+ * as typed `FederationClientError` instances.
+ *
+ * ## Error code taxonomy
+ *
+ * | Code               | When                                                          |
+ * | ------------------ | ------------------------------------------------------------- |
+ * | PEER_NOT_FOUND     | No row in federation_peers for the given peerId               |
+ * | PEER_INACTIVE      | Peer row exists but state !== 'active'                        |
+ * | PEER_MISCONFIGURED | Peer row is active but missing endpointUrl or clientKeyPem    |
+ * | NETWORK            | undici threw a connection / TLS / timeout error               |
+ * | HTTP_{status}      | Peer returned a non-2xx response (e.g. HTTP_403, HTTP_404)    |
+ * | FORBIDDEN          | Peer returned 403 (convenience alias alongside HTTP_403)      |
+ * | INVALID_RESPONSE   | Response body failed Zod schema validation                    |
+ *
+ * ## Cache strategy
+ *
+ * Per-peer `undici.Agent` instances are cached in a `Map<peerId, AgentCacheEntry>` for
+ * the lifetime of the service instance.  The cache is keyed on peerId (UUID).
+ *
+ * Cache invalidation:
+ *  - `flushPeer(peerId)` — removes the entry immediately.  M5/M6 MUST call this on
+ *    cert rotation or peer revocation events so the next request re-reads the DB and
+ *    builds a fresh TLS Agent with the new cert material.
+ *  - On cache miss: re-reads the DB, checks state === 'active', rebuilds Agent.
+ *
+ * Cache does NOT auto-expire.  The service is expected to be a singleton scoped to the
+ * NestJS application lifecycle; flushing on revocation/rotation is the only invalidation
+ * path by design (avoids redundant DB round-trips on the hot path).
+ */
+
+import { Injectable, Inject, Logger } from '@nestjs/common';
+import { readFileSync } from 'node:fs';
+import { Agent, fetch as undiciFetch } from 'undici';
+import type { Dispatcher } from 'undici';
+import { z } from 'zod';
+import { type Db, eq, federationPeers } from '@mosaicstack/db';
+import {
+  FederationListResponseSchema,
+  FederationGetResponseSchema,
+  FederationCapabilitiesResponseSchema,
+  FederationErrorEnvelopeSchema,
+  type FederationListResponse,
+  type FederationGetResponse,
+  type FederationCapabilitiesResponse,
+} from '@mosaicstack/types';
+import { DB } from '../../database/database.module.js';
+import { unsealClientKey } from '../peer-key.util.js';
+
+// ---------------------------------------------------------------------------
+// Error taxonomy
+// ---------------------------------------------------------------------------
+
+/**
+ * Client-side error code set.  Distinct from the server-side `FederationErrorCode`
+ * (which lives in `@mosaicstack/types`) because the client has additional failure
+ * modes (PEER_NOT_FOUND, PEER_INACTIVE, PEER_MISCONFIGURED, NETWORK) that the
+ * server never emits.
+ */
+export type FederationClientErrorCode =
+  | 'PEER_NOT_FOUND'
+  | 'PEER_INACTIVE'
+  | 'PEER_MISCONFIGURED'
+  | 'NETWORK'
+  | 'FORBIDDEN'
+  | 'INVALID_RESPONSE'
+  | `HTTP_${number}`;
+
+export interface FederationClientErrorOptions {
+  status?: number;
+  code: FederationClientErrorCode;
+  message: string;
+  peerId: string;
+  cause?: unknown;
+}
+
+/**
+ * Thrown by FederationClientService on every failure path.
+ * Callers can dispatch on `error.code` for programmatic handling.
+ */
+export class FederationClientError extends Error {
+  readonly status?: number;
+  readonly code: FederationClientErrorCode;
+  readonly peerId: string;
+  readonly cause?: unknown;
+
+  constructor(opts: FederationClientErrorOptions) {
+    super(opts.message);
+    this.name = 'FederationClientError';
+    this.status = opts.status;
+    this.code = opts.code;
+    this.peerId = opts.peerId;
+    this.cause = opts.cause;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Internal cache types
+// ---------------------------------------------------------------------------
+
+interface AgentCacheEntry {
+  agent: Agent;
+  endpointUrl: string;
+  certPem: string;
+  certSerial: string;
+}
+
+// ---------------------------------------------------------------------------
+// Service
+// ---------------------------------------------------------------------------
+
+@Injectable()
+export class FederationClientService {
+  private readonly logger = new Logger(FederationClientService.name);
+
+  /**
+   * Per-peer undici Agent cache.
+   * Key = peerId (UUID string).
+   *
+   * Values are either a resolved `AgentCacheEntry` or an in-flight
+   * `Promise<AgentCacheEntry>` (promise-cache pattern).  Storing the promise
+   * prevents duplicate DB lookups and duplicate key-unseal operations when two
+   * requests for the same peer arrive before the first build completes.
+   *
+   * Flush via `flushPeer(peerId)` on cert rotation / peer revocation (M5/M6).
+   */
+  private readonly cache = new Map<string, AgentCacheEntry | Promise<AgentCacheEntry>>();
+
+  /**
+   * Step-CA root cert PEM, loaded once from `STEP_CA_ROOT_CERT_PATH`.
+   * Used as the trust anchor for peer server certificates so federation TLS is
+   * pinned to our PKI, not the public trust store. Lazily loaded on first use
+   * so unit tests that don't exercise the agent path can run without the env var.
+   */
+  private cachedCaPem: string | null = null;
+
+  constructor(@Inject(DB) private readonly db: Db) {}
+
+  // -------------------------------------------------------------------------
+  // Public verb API
+  // -------------------------------------------------------------------------
+
+  /**
+   * Invoke the `list` verb on a remote peer.
+   *
+   * @param peerId   UUID of the peer row in `federation_peers`.
+   * @param resource Resource path, e.g. "tasks".
+   * @param request  Free-form body sent as JSON in the POST body.
+   * @returns Parsed `FederationListResponse<T>`.
+   */
+  async list<T>(
+    peerId: string,
+    resource: string,
+    request: Record<string, unknown>,
+  ): Promise<FederationListResponse<T>> {
+    const { endpointUrl, agent } = await this.resolveEntry(peerId);
+    const url = `${endpointUrl}/api/federation/v1/list/${encodeURIComponent(resource)}`;
+    const body = await this.doPost(peerId, url, agent, request);
+    return this.parseWith<FederationListResponse<T>>(
+      peerId,
+      body,
+      FederationListResponseSchema(z.unknown()),
+    );
+  }
+
+  /**
+   * Invoke the `get` verb on a remote peer.
+   *
+   * @param peerId   UUID of the peer row in `federation_peers`.
+   * @param resource Resource path, e.g. "tasks".
+   * @param id       Resource identifier.
+   * @param request  Free-form body sent as JSON in the POST body.
+   * @returns Parsed `FederationGetResponse<T>`.
+   */
+  async get<T>(
+    peerId: string,
+    resource: string,
+    id: string,
+    request: Record<string, unknown>,
+  ): Promise<FederationGetResponse<T>> {
+    const { endpointUrl, agent } = await this.resolveEntry(peerId);
+    const url = `${endpointUrl}/api/federation/v1/get/${encodeURIComponent(resource)}/${encodeURIComponent(id)}`;
+    const body = await this.doPost(peerId, url, agent, request);
+    return this.parseWith<FederationGetResponse<T>>(
+      peerId,
+      body,
+      FederationGetResponseSchema(z.unknown()),
+    );
+  }
+
+  /**
+   * Invoke the `capabilities` verb on a remote peer.
+   *
+   * @param peerId UUID of the peer row in `federation_peers`.
+   * @returns Parsed `FederationCapabilitiesResponse`.
+   */
+  async capabilities(peerId: string): Promise<FederationCapabilitiesResponse> {
+    const { endpointUrl, agent } = await this.resolveEntry(peerId);
+    const url = `${endpointUrl}/api/federation/v1/capabilities`;
+    const body = await this.doGet(peerId, url, agent);
+    return this.parseWith<FederationCapabilitiesResponse>(
+      peerId,
+      body,
+      FederationCapabilitiesResponseSchema,
+    );
+  }
+
+  // -------------------------------------------------------------------------
+  // Cache management
+  // -------------------------------------------------------------------------
+
+  /**
+   * Flush the cached Agent for a specific peer.
+   *
+   * M5/M6 MUST call this on:
+   *  - cert rotation events (so new cert material is picked up)
+   *  - peer revocation events (so future requests fail at PEER_INACTIVE)
+   *
+   * After flushing, the next call to `list`, `get`, or `capabilities` for
+   * this peer will re-read the DB and rebuild the Agent.
+   */
+  flushPeer(peerId: string): void {
+    const entry = this.cache.get(peerId);
+    if (entry === undefined) {
+      return;
+    }
+    this.cache.delete(peerId);
+    if (!(entry instanceof Promise)) {
+      // best-effort destroy; promise-cached entries skip destroy because
+      // the in-flight build owns its own Agent which will be GC'd when the
+      // owning request handles the rejection from the cache miss
+      entry.agent.destroy().catch(() => {
+        // intentionally ignored — destroy errors are not actionable
+      });
+    }
+    this.logger.log(`Cache flushed for peer ${peerId}`);
+  }
+
+  // -------------------------------------------------------------------------
+  // Internal helpers
+  // -------------------------------------------------------------------------
+
+  /**
+   * Load and cache the Step-CA root cert PEM from `STEP_CA_ROOT_CERT_PATH`.
+   * Throws `FederationClientError` if the env var is unset or the file cannot
+   * be read — mTLS to a peer without a pinned trust anchor would silently
+   * fall back to the public trust store.
+   */
+  private loadStepCaRoot(): string {
+    if (this.cachedCaPem !== null) {
+      return this.cachedCaPem;
+    }
+    const path = process.env['STEP_CA_ROOT_CERT_PATH'];
+    if (!path) {
+      throw new FederationClientError({
+        code: 'PEER_MISCONFIGURED',
+        message: 'STEP_CA_ROOT_CERT_PATH is not set; refusing to dial peer without pinned CA trust',
+        peerId: '',
+      });
+    }
+    try {
+      const pem = readFileSync(path, 'utf8');
+      this.cachedCaPem = pem;
+      return pem;
+    } catch (err) {
+      throw new FederationClientError({
+        code: 'PEER_MISCONFIGURED',
+        message: `Failed to read STEP_CA_ROOT_CERT_PATH (${path})`,
+        peerId: '',
+        cause: err,
+      });
+    }
+  }
+
+  /**
+   * Resolve the cache entry for a peer, reading DB on miss.
+   *
+   * Uses a promise-cache pattern: concurrent callers for the same uncached
+   * `peerId` all `await` the same in-flight `Promise<AgentCacheEntry>` so
+   * only one DB lookup and one key-unseal ever runs per peer per cache miss.
+   * The promise is replaced with the concrete entry on success, or deleted on
+   * rejection so a transient error does not poison the cache permanently.
+   *
+   * Throws `FederationClientError` with appropriate code if the peer is not
+   * found, is inactive, or is missing required fields.
+   */
+  private async resolveEntry(peerId: string): Promise<AgentCacheEntry> {
+    const cached = this.cache.get(peerId);
+    if (cached) {
+      return cached; // Promise or concrete entry — both are awaitable
+    }
+
+    const inflight = this.buildEntry(peerId).then(
+      (entry) => {
+        this.cache.set(peerId, entry); // replace promise with concrete value
+        return entry;
+      },
+      (err: unknown) => {
+        this.cache.delete(peerId); // don't poison the cache with a rejected promise
+        throw err;
+      },
+    );
+
+    this.cache.set(peerId, inflight);
+    return inflight;
+  }
+
+  /**
+   * Build the `AgentCacheEntry` for a peer by reading the DB, validating the
+   * peer's state, unsealing the private key, and constructing the mTLS Agent.
+   *
+   * Throws `FederationClientError` with appropriate code if the peer is not
+   * found, is inactive, or is missing required fields.
+   */
+  private async buildEntry(peerId: string): Promise<AgentCacheEntry> {
+    // DB lookup
+    const [peer] = await this.db
+      .select()
+      .from(federationPeers)
+      .where(eq(federationPeers.id, peerId))
+      .limit(1);
+
+    if (!peer) {
+      throw new FederationClientError({
+        code: 'PEER_NOT_FOUND',
+        message: `Federation peer ${peerId} not found`,
+        peerId,
+      });
+    }
+
+    if (peer.state !== 'active') {
+      throw new FederationClientError({
+        code: 'PEER_INACTIVE',
+        message: `Federation peer ${peerId} is not active (state: ${peer.state})`,
+        peerId,
+      });
+    }
+
+    if (!peer.endpointUrl || !peer.clientKeyPem) {
+      throw new FederationClientError({
+        code: 'PEER_MISCONFIGURED',
+        message: `Federation peer ${peerId} is missing endpointUrl or clientKeyPem`,
+        peerId,
+      });
+    }
+
+    // Unseal the private key
+    let privateKeyPem: string;
+    try {
+      privateKeyPem = unsealClientKey(peer.clientKeyPem);
+    } catch (err) {
+      throw new FederationClientError({
+        code: 'PEER_MISCONFIGURED',
+        message: `Failed to unseal client key for peer ${peerId}`,
+        peerId,
+        cause: err,
+      });
+    }
+
+    // Build mTLS agent — pin trust to Step-CA root so we never accept
+    // a peer cert signed by a public CA (defense against MITM with a
+    // publicly-trusted DV cert for the peer's hostname).
+    const agent = new Agent({
+      connect: {
+        cert: peer.certPem,
+        key: privateKeyPem,
+        ca: this.loadStepCaRoot(),
+        // rejectUnauthorized: true is the undici default for HTTPS
+      },
+    });
+
+    const entry: AgentCacheEntry = {
+      agent,
+      endpointUrl: peer.endpointUrl,
+      certPem: peer.certPem,
+      certSerial: peer.certSerial,
+    };
+
+    this.logger.log(`Agent cached for peer ${peerId} (serial: ${peer.certSerial})`);
+
+    return entry;
+  }
+
+  /**
+   * Execute a POST request with a JSON body.
+   * Returns the parsed response body as an unknown value.
+   * Throws `FederationClientError` on network errors and non-2xx responses.
+   */
+  private async doPost(
+    peerId: string,
+    url: string,
+    agent: Dispatcher,
+    body: Record<string, unknown>,
+  ): Promise<unknown> {
+    return this.doRequest(peerId, url, agent, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    });
+  }
+
+  /**
+   * Execute a GET request.
+   * Returns the parsed response body as an unknown value.
+   * Throws `FederationClientError` on network errors and non-2xx responses.
+   */
+  private async doGet(peerId: string, url: string, agent: Dispatcher): Promise<unknown> {
+    return this.doRequest(peerId, url, agent, { method: 'GET' });
+  }
+
+  private async doRequest(
+    peerId: string,
+    url: string,
+    agent: Dispatcher,
+    init: { method: string; headers?: Record<string, string>; body?: string },
+  ): Promise<unknown> {
+    let response: Awaited<ReturnType<typeof undiciFetch>>;
+
+    try {
+      response = await undiciFetch(url, {
+        ...init,
+        dispatcher: agent,
+      });
+    } catch (err) {
+      throw new FederationClientError({
+        code: 'NETWORK',
+        message: `Network error calling peer ${peerId} at ${url}: ${err instanceof Error ? err.message : String(err)}`,
+        peerId,
+        cause: err,
+      });
+    }
+
+    const rawBody = await response.text().catch(() => '');
+
+    if (!response.ok) {
+      const status = response.status;
+
+      // Attempt to parse as federation error envelope
+      let serverMessage = `HTTP ${status}`;
+      try {
+        const json: unknown = JSON.parse(rawBody);
+        const result = FederationErrorEnvelopeSchema.safeParse(json);
+        if (result.success) {
+          serverMessage = result.data.error.message;
+        }
+      } catch {
+        // Not valid JSON or not a federation envelope — use generic message
+      }
+
+      // Specific code for 403 (most actionable for callers); generic HTTP_{n} for others
+      const code: FederationClientErrorCode = status === 403 ? 'FORBIDDEN' : `HTTP_${status}`;
+
+      throw new FederationClientError({
+        status,
+        code,
+        message: `Peer ${peerId} returned ${status}: ${serverMessage}`,
+        peerId,
+      });
+    }
+
+    try {
+      return JSON.parse(rawBody) as unknown;
+    } catch (err) {
+      throw new FederationClientError({
+        code: 'INVALID_RESPONSE',
+        message: `Peer ${peerId} returned non-JSON body`,
+        peerId,
+        cause: err,
+      });
+    }
+  }
+
+  /**
+   * Parse and validate a response body against a Zod schema.
+   *
+   * For list/get, callers pass the result of `FederationListResponseSchema(z.unknown())`
+   * so that the envelope structure is validated without requiring a concrete item schema
+   * at the client level.  The generic `T` provides compile-time typing.
+   *
+   * Throws `FederationClientError({ code: 'INVALID_RESPONSE' })` on parse failure.
+   */
+  private parseWith<T>(peerId: string, body: unknown, schema: z.ZodTypeAny): T {
+    const result = schema.safeParse(body);
+    if (!result.success) {
+      const issues = result.error.issues
+        .map((e: z.ZodIssue) => `[${e.path.join('.') || 'root'}] ${e.message}`)
+        .join('; ');
+      throw new FederationClientError({
+        code: 'INVALID_RESPONSE',
+        message: `Peer ${peerId} returned invalid response shape: ${issues}`,
+        peerId,
+      });
+    }
+    return result.data as T;
+  }
+}

apps/gateway/src/federation/client/index.ts

@@ -0,0 +1,23 @@
+/**
+ * Federation client barrel — re-exports for FederationModule consumers.
+ *
+ * M3-09 (QuerySourceService) and future milestones should import from here,
+ * not directly from the implementation file.
+ */
+
+export {
+  FederationClientService,
+  FederationClientError,
+  type FederationClientErrorCode,
+  type FederationClientErrorOptions,
+} from './federation-client.service.js';
+export {
+  QuerySourceService,
+  QuerySourceError,
+  type QuerySource,
+  type QuerySourceErrorCode,
+  type QuerySourceErrorOptions,
+  type QuerySourceListOptions,
+  type QuerySourceListResponse,
+  type LocalListExecutor,
+} from './query-source.service.js';

apps/gateway/src/federation/client/query-source.service.ts

@@ -0,0 +1,261 @@
+/**
+ * QuerySourceService — gateway query source router (FED-M3-09).
+ *
+ * Accepts the federation query-layer `source` selector and routes list-style
+ * reads to local storage, one federated peer, or all active outbound peers.
+ *
+ * `source: "all"` is intentionally tolerant of per-peer failures: local data
+ * and successful peer responses are returned, and the envelope is marked
+ * `_partial: true`.  Local failures still reject because there is no safe local
+ * fallback and the gateway's own storage is expected to be authoritative.
+ */
+
+import { Inject, Injectable, Logger } from '@nestjs/common';
+import { and, eq, federationPeers, isNotNull, type Db } from '@mosaicstack/db';
+import {
+  SOURCE_LOCAL,
+  tagWithSource,
+  type FederationListResponse,
+  type SourceTag,
+} from '@mosaicstack/types';
+import { DB } from '../../database/database.module.js';
+import { FederationClientService } from './federation-client.service.js';
+
+export type QuerySource = 'local' | 'all' | `federated:${string}`;
+
+export type QuerySourceErrorCode = 'INVALID_SOURCE' | 'PEER_NOT_FOUND';
+
+export interface QuerySourceErrorOptions {
+  code: QuerySourceErrorCode;
+  message: string;
+  source: string;
+}
+
+export class QuerySourceError extends Error {
+  readonly code: QuerySourceErrorCode;
+  readonly source: string;
+
+  constructor(opts: QuerySourceErrorOptions) {
+    super(opts.message);
+    this.name = 'QuerySourceError';
+    this.code = opts.code;
+    this.source = opts.source;
+  }
+}
+
+export type LocalListExecutor<T extends object> = () => Promise<FederationListResponse<T> | T[]>;
+
+export interface QuerySourceListOptions<T extends object> {
+  source: QuerySource;
+  resource: string;
+  request?: Record<string, unknown>;
+  local: LocalListExecutor<T>;
+}
+
+export type QuerySourceListResponse<T extends object> = FederationListResponse<T & SourceTag>;
+
+interface OutboundPeer {
+  id: string;
+  commonName: string;
+  endpointUrl: string;
+}
+
+interface TaggedList<T extends object> {
+  items: Array<T & SourceTag>;
+  partial: boolean;
+  truncated: boolean;
+  nextCursor?: string;
+}
+
+@Injectable()
+export class QuerySourceService {
+  private readonly logger = new Logger(QuerySourceService.name);
+
+  constructor(
+    @Inject(DB) private readonly db: Db,
+    @Inject(FederationClientService) private readonly federationClient: FederationClientService,
+  ) {}
+
+  async list<T extends object>(
+    options: QuerySourceListOptions<T>,
+  ): Promise<QuerySourceListResponse<T>> {
+    const request = options.request ?? {};
+
+    if (options.source === 'local') {
+      const local = await this.runLocal(options.local);
+      return this.toResponse(this.tagList(local, SOURCE_LOCAL));
+    }
+
+    if (options.source === 'all') {
+      return this.listAll(options.resource, request, options.local);
+    }
+
+    if (options.source.startsWith('federated:')) {
+      const host = options.source.slice('federated:'.length).trim();
+      if (!host) {
+        throw new QuerySourceError({
+          code: 'INVALID_SOURCE',
+          message: 'Federated source must include a host after federated:',
+          source: options.source,
+        });
+      }
+
+      const peer = await this.findPeerByHost(host, options.source);
+      const remote = await this.federationClient.list<T>(peer.id, options.resource, request);
+      return this.toResponse(this.tagList(remote, peer.commonName));
+    }
+
+    throw new QuerySourceError({
+      code: 'INVALID_SOURCE',
+      message: `Unsupported query source: ${options.source}`,
+      source: options.source,
+    });
+  }
+
+  private async listAll<T extends object>(
+    resource: string,
+    request: Record<string, unknown>,
+    local: LocalListExecutor<T>,
+  ): Promise<QuerySourceListResponse<T>> {
+    const peers = await this.listActiveOutboundPeers();
+
+    const localPromise = this.runLocal(local).then((response) =>
+      this.tagList(response, SOURCE_LOCAL),
+    );
+    const remotePromises = peers.map(async (peer: OutboundPeer): Promise<TaggedList<T> | null> => {
+      try {
+        const response = await this.federationClient.list<T>(peer.id, resource, request);
+        return this.tagList(response, peer.commonName);
+      } catch (error: unknown) {
+        this.logger.warn(
+          `Federated query to peer ${peer.commonName} (${peer.id}) failed; returning partial all-source response: ${
+            error instanceof Error ? error.message : String(error)
+          }`,
+        );
+        return null;
+      }
+    });
+
+    const [localResult, ...remoteResults] = await Promise.all([localPromise, ...remotePromises]);
+    const successfulRemoteResults = remoteResults.filter(
+      (result: TaggedList<T> | null): result is TaggedList<T> => result !== null,
+    );
+    const allResults = [localResult, ...successfulRemoteResults];
+    const peerFailure = successfulRemoteResults.length !== peers.length;
+
+    return this.mergeTaggedLists(allResults, peerFailure);
+  }
+
+  private async runLocal<T extends object>(
+    local: LocalListExecutor<T>,
+  ): Promise<FederationListResponse<T>> {
+    const response = await local();
+    if (Array.isArray(response)) {
+      return { items: response };
+    }
+    return response;
+  }
+
+  private tagList<T extends object>(
+    response: FederationListResponse<T>,
+    source: string,
+  ): TaggedList<T> {
+    return {
+      items: tagWithSource(response.items, source),
+      partial: response._partial === true,
+      truncated: response._truncated === true || response.nextCursor !== undefined,
+      nextCursor: response.nextCursor,
+    };
+  }
+
+  private mergeTaggedLists<T extends object>(
+    lists: Array<TaggedList<T>>,
+    peerFailure: boolean,
+  ): QuerySourceListResponse<T> {
+    const items = lists.flatMap((list: TaggedList<T>) => list.items);
+    const partial =
+      peerFailure ||
+      lists.some((list: TaggedList<T>) => list.partial || list.nextCursor !== undefined);
+    const truncated = lists.some((list: TaggedList<T>) => list.truncated);
+
+    const response: QuerySourceListResponse<T> = { items };
+    if (partial) {
+      response._partial = true;
+    }
+    if (truncated) {
+      response._truncated = true;
+    }
+    return response;
+  }
+
+  private toResponse<T extends object>(tagged: TaggedList<T>): QuerySourceListResponse<T> {
+    const response: QuerySourceListResponse<T> = {
+      items: tagged.items,
+    };
+    if (tagged.nextCursor !== undefined) {
+      response.nextCursor = tagged.nextCursor;
+    }
+    if (tagged.partial) {
+      response._partial = true;
+    }
+    if (tagged.truncated) {
+      response._truncated = true;
+    }
+    return response;
+  }
+
+  private async findPeerByHost(sourceHost: string, source: string): Promise<OutboundPeer> {
+    const host = normalizeHost(sourceHost);
+    const peers = await this.listActiveOutboundPeers();
+    const peer = peers.find((candidate: OutboundPeer) => {
+      const commonName = normalizeHost(candidate.commonName);
+      const endpointHosts = endpointHostKeys(candidate.endpointUrl).map((endpointHost: string) =>
+        normalizeHost(endpointHost),
+      );
+      return commonName === host || endpointHosts.includes(host);
+    });
+
+    if (!peer) {
+      throw new QuerySourceError({
+        code: 'PEER_NOT_FOUND',
+        message: `No active outbound federation peer matches source ${source}`,
+        source,
+      });
+    }
+
+    return peer;
+  }
+
+  private async listActiveOutboundPeers(): Promise<OutboundPeer[]> {
+    const rows = await this.db
+      .select({
+        id: federationPeers.id,
+        commonName: federationPeers.commonName,
+        endpointUrl: federationPeers.endpointUrl,
+      })
+      .from(federationPeers)
+      .where(
+        and(
+          eq(federationPeers.state, 'active'),
+          isNotNull(federationPeers.endpointUrl),
+          isNotNull(federationPeers.clientKeyPem),
+        ),
+      )
+      .orderBy(federationPeers.commonName);
+
+    return rows.filter((row): row is OutboundPeer => typeof row.endpointUrl === 'string');
+  }
+}
+
+function normalizeHost(host: string): string {
+  return host.trim().toLowerCase();
+}
+
+function endpointHostKeys(endpointUrl: string): string[] {
+  try {
+    const url = new URL(endpointUrl);
+    return Array.from(new Set([url.host, url.hostname].filter((host: string) => host.length > 0)));
+  } catch {
+    return [];
+  }
+}

apps/gateway/src/federation/enrollment.controller.ts

@@ -0,0 +1,54 @@
+/**
+ * EnrollmentController — federation enrollment HTTP layer (FED-M2-07).
+ *
+ * Routes:
+ *   POST /api/federation/enrollment/tokens   — admin creates a single-use token
+ *   POST /api/federation/enrollment/:token   — unauthenticated; token IS the auth
+ */
+
+import {
+  Body,
+  Controller,
+  HttpCode,
+  HttpStatus,
+  Inject,
+  Param,
+  Post,
+  UseGuards,
+} from '@nestjs/common';
+import { AdminGuard } from '../admin/admin.guard.js';
+import { EnrollmentService } from './enrollment.service.js';
+import { CreateEnrollmentTokenDto, RedeemEnrollmentTokenDto } from './enrollment.dto.js';
+
+@Controller('api/federation/enrollment')
+export class EnrollmentController {
+  constructor(@Inject(EnrollmentService) private readonly enrollmentService: EnrollmentService) {}
+
+  /**
+   * Admin-only: generate a single-use enrollment token for a pending grant.
+   * The token should be distributed out-of-band to the remote peer operator.
+   *
+   * POST /api/federation/enrollment/tokens
+   */
+  @Post('tokens')
+  @UseGuards(AdminGuard)
+  @HttpCode(HttpStatus.CREATED)
+  async createToken(@Body() dto: CreateEnrollmentTokenDto) {
+    return this.enrollmentService.createToken(dto);
+  }
+
+  /**
+   * Unauthenticated: remote peer redeems a token by submitting its CSR.
+   * The token itself is the credential — no session or bearer token required.
+   *
+   * POST /api/federation/enrollment/:token
+   *
+   * Returns the signed leaf cert and full chain PEM on success.
+   * Returns 410 Gone if the token was already used or has expired.
+   */
+  @Post(':token')
+  @HttpCode(HttpStatus.OK)
+  async redeem(@Param('token') token: string, @Body() dto: RedeemEnrollmentTokenDto) {
+    return this.enrollmentService.redeem(token, dto.csrPem);
+  }
+}

apps/gateway/src/federation/enrollment.dto.ts

@@ -0,0 +1,35 @@
+/**
+ * DTOs for the federation enrollment flow (FED-M2-07).
+ *
+ * CreateEnrollmentTokenDto  — admin generates a single-use enrollment token
+ * RedeemEnrollmentTokenDto  — remote peer submits CSR to redeem the token
+ */
+
+import { IsInt, IsNotEmpty, IsOptional, IsString, IsUUID, Max, Min } from 'class-validator';
+
+export class CreateEnrollmentTokenDto {
+  /** UUID of the federation grant this token will activate on redemption. */
+  @IsUUID()
+  grantId!: string;
+
+  /** UUID of the peer record that will receive the issued cert on redemption. */
+  @IsUUID()
+  peerId!: string;
+
+  /**
+   * Token lifetime in seconds. Default 900 (15 min). Min 60. Max 900.
+   * After this time the token is rejected even if unused.
+   */
+  @IsOptional()
+  @IsInt()
+  @Min(60)
+  @Max(900)
+  ttlSeconds: number = 900;
+}
+
+export class RedeemEnrollmentTokenDto {
+  /** PEM-encoded PKCS#10 Certificate Signing Request from the remote peer. */
+  @IsString()
+  @IsNotEmpty()
+  csrPem!: string;
+}

apps/gateway/src/federation/enrollment.service.ts

@@ -0,0 +1,281 @@
+/**
+ * EnrollmentService — single-use enrollment token lifecycle (FED-M2-07).
+ *
+ * Responsibilities:
+ *  1. Generate time-limited single-use enrollment tokens (admin action).
+ *  2. Redeem a token: validate → atomically claim token → issue cert via
+ *     CaService → transactionally activate grant + update peer + write audit.
+ *
+ * Replay protection: the token is claimed (UPDATE WHERE used_at IS NULL) BEFORE
+ * cert issuance. This prevents double cert minting on concurrent requests.
+ * If cert issuance fails after claim, the token is consumed and the grant
+ * stays pending — admin must create a new grant.
+ */
+
+import {
+  BadRequestException,
+  ConflictException,
+  GoneException,
+  Inject,
+  Injectable,
+  Logger,
+  NotFoundException,
+} from '@nestjs/common';
+import * as crypto from 'node:crypto';
+// X509Certificate is available as a named export in Node.js ≥ 15.6
+const { X509Certificate } = crypto;
+import {
+  type Db,
+  and,
+  eq,
+  isNull,
+  sql,
+  federationEnrollmentTokens,
+  federationGrants,
+  federationPeers,
+  federationAuditLog,
+} from '@mosaicstack/db';
+import { DB } from '../database/database.module.js';
+import { CaService } from './ca.service.js';
+import { GrantsService } from './grants.service.js';
+import { FederationScopeError } from './scope-schema.js';
+import type { CreateEnrollmentTokenDto } from './enrollment.dto.js';
+
+export interface EnrollmentTokenResult {
+  token: string;
+  expiresAt: string;
+}
+
+export interface RedeemResult {
+  certPem: string;
+  certChainPem: string;
+}
+
+@Injectable()
+export class EnrollmentService {
+  private readonly logger = new Logger(EnrollmentService.name);
+
+  constructor(
+    @Inject(DB) private readonly db: Db,
+    private readonly caService: CaService,
+    private readonly grantsService: GrantsService,
+  ) {}
+
+  /**
+   * Generate a single-use enrollment token for an admin to distribute
+   * out-of-band to the remote peer operator.
+   */
+  async createToken(dto: CreateEnrollmentTokenDto): Promise<EnrollmentTokenResult> {
+    const ttl = Math.min(dto.ttlSeconds, 900);
+
+    // MED-3: Verify the grantId ↔ peerId binding — prevents attacker from
+    // cross-wiring grants to attacker-controlled peers.
+    const [grant] = await this.db
+      .select({ peerId: federationGrants.peerId })
+      .from(federationGrants)
+      .where(eq(federationGrants.id, dto.grantId))
+      .limit(1);
+    if (!grant) {
+      throw new NotFoundException(`Grant ${dto.grantId} not found`);
+    }
+    if (grant.peerId !== dto.peerId) {
+      throw new BadRequestException(`peerId does not match the grant's registered peer`);
+    }
+
+    const token = crypto.randomBytes(32).toString('hex');
+    const expiresAt = new Date(Date.now() + ttl * 1000);
+
+    await this.db.insert(federationEnrollmentTokens).values({
+      token,
+      grantId: dto.grantId,
+      peerId: dto.peerId,
+      expiresAt,
+    });
+
+    this.logger.log(
+      `Enrollment token created — grantId=${dto.grantId} peerId=${dto.peerId} expiresAt=${expiresAt.toISOString()}`,
+    );
+
+    return { token, expiresAt: expiresAt.toISOString() };
+  }
+
+  /**
+   * Redeem an enrollment token.
+   *
+   * Full flow:
+   *  1. Fetch token row — NotFoundException if not found
+   *  2. usedAt set → GoneException (already used)
+   *  3. expiresAt < now → GoneException (expired)
+   *  4. Load grant — verify status is 'pending'
+   *  5. Atomically claim token (UPDATE WHERE used_at IS NULL RETURNING token)
+   *     — if no rows returned, concurrent request won → GoneException
+   *  6. Issue cert via CaService (network call, outside transaction)
+   *     — if this fails, token is consumed; grant stays pending; admin must recreate
+   *  7. Transaction: activate grant + update peer record + write audit log
+   *  8. Return { certPem, certChainPem }
+   */
+  async redeem(token: string, csrPem: string): Promise<RedeemResult> {
+    // HIGH-5: Track outcome so we can write a failure audit row on any error.
+    let outcome: 'allowed' | 'denied' = 'denied';
+    // row may be undefined if the token is not found — used defensively in catch.
+    let row: typeof federationEnrollmentTokens.$inferSelect | undefined;
+
+    try {
+      // 1. Fetch token row
+      const [fetchedRow] = await this.db
+        .select()
+        .from(federationEnrollmentTokens)
+        .where(eq(federationEnrollmentTokens.token, token))
+        .limit(1);
+
+      if (!fetchedRow) {
+        throw new NotFoundException('Enrollment token not found');
+      }
+      row = fetchedRow;
+
+      // 2. Already used?
+      if (row.usedAt !== null) {
+        throw new GoneException('Enrollment token has already been used');
+      }
+
+      // 3. Expired?
+      if (row.expiresAt < new Date()) {
+        throw new GoneException('Enrollment token has expired');
+      }
+
+      // 4. Load grant and verify it is still pending
+      let grant;
+      try {
+        grant = await this.grantsService.getGrant(row.grantId);
+      } catch (err) {
+        if (err instanceof FederationScopeError) {
+          throw new BadRequestException(err.message);
+        }
+        throw err;
+      }
+
+      if (grant.status !== 'pending') {
+        throw new GoneException(
+          `Grant ${row.grantId} is no longer pending (status: ${grant.status})`,
+        );
+      }
+
+      // 5. Atomically claim the token BEFORE cert issuance to prevent double-minting.
+      // WHERE used_at IS NULL ensures only one concurrent request wins.
+      // Using .returning() works on both node-postgres and PGlite without rowCount inspection.
+      const claimed = await this.db
+        .update(federationEnrollmentTokens)
+        .set({ usedAt: sql`NOW()` })
+        .where(
+          and(
+            eq(federationEnrollmentTokens.token, token),
+            isNull(federationEnrollmentTokens.usedAt),
+          ),
+        )
+        .returning({ token: federationEnrollmentTokens.token });
+
+      if (claimed.length === 0) {
+        throw new GoneException('Enrollment token has already been used (concurrent request)');
+      }
+
+      // 6. Issue certificate via CaService (network call — outside any transaction).
+      // If this throws, the token is already consumed. The grant stays pending.
+      // Admin must revoke the grant and create a new one.
+      let issued;
+      try {
+        issued = await this.caService.issueCert({
+          csrPem,
+          grantId: row.grantId,
+          subjectUserId: grant.subjectUserId,
+          ttlSeconds: 300,
+        });
+      } catch (err) {
+        // HIGH-4: Log only the first 8 hex chars of the token for correlation — never log the full token.
+        this.logger.error(
+          `issueCert failed after token ${token.slice(0, 8)}... was claimed — grant ${row.grantId} is stranded pending`,
+          err instanceof Error ? err.stack : String(err),
+        );
+        if (err instanceof FederationScopeError) {
+          throw new BadRequestException((err as Error).message);
+        }
+        throw err;
+      }
+
+      // 7. Atomically activate grant, update peer record, and write audit log.
+      const certNotAfter = this.extractCertNotAfter(issued.certPem);
+      await this.db.transaction(async (tx) => {
+        // CRIT-2: Guard activation with WHERE status='pending' to prevent double-activation.
+        const [activated] = await tx
+          .update(federationGrants)
+          .set({ status: 'active' })
+          .where(and(eq(federationGrants.id, row!.grantId), eq(federationGrants.status, 'pending')))
+          .returning({ id: federationGrants.id });
+        if (!activated) {
+          throw new ConflictException(
+            `Grant ${row!.grantId} is no longer pending — cannot activate`,
+          );
+        }
+
+        // CRIT-2: Guard peer update with WHERE state='pending'.
+        await tx
+          .update(federationPeers)
+          .set({
+            certPem: issued.certPem,
+            certSerial: issued.serialNumber,
+            certNotAfter,
+            state: 'active',
+          })
+          .where(and(eq(federationPeers.id, row!.peerId), eq(federationPeers.state, 'pending')));
+
+        await tx.insert(federationAuditLog).values({
+          requestId: crypto.randomUUID(),
+          peerId: row!.peerId,
+          grantId: row!.grantId,
+          verb: 'enrollment',
+          resource: 'federation_grant',
+          statusCode: 200,
+          outcome: 'allowed',
+        });
+      });
+
+      this.logger.log(
+        `Enrollment complete — peerId=${row.peerId} grantId=${row.grantId} serial=${issued.serialNumber}`,
+      );
+
+      outcome = 'allowed';
+
+      // 8. Return cert material
+      return {
+        certPem: issued.certPem,
+        certChainPem: issued.certChainPem,
+      };
+    } catch (err) {
+      // HIGH-5: Best-effort audit write on failure — do not let this throw.
+      if (outcome === 'denied') {
+        await this.db
+          .insert(federationAuditLog)
+          .values({
+            requestId: crypto.randomUUID(),
+            peerId: row?.peerId ?? null,
+            grantId: row?.grantId ?? null,
+            verb: 'enrollment',
+            resource: 'federation_grant',
+            statusCode:
+              err instanceof GoneException ? 410 : err instanceof NotFoundException ? 404 : 500,
+            outcome: 'denied',
+          })
+          .catch(() => {});
+      }
+      throw err;
+    }
+  }
+
+  /**
+   * Extract the notAfter date from a PEM certificate.
+   * HIGH-2: No silent fallback — a cert that cannot be parsed should fail loud.
+   */
+  private extractCertNotAfter(certPem: string): Date {
+    const cert = new X509Certificate(certPem);
+    return new Date(cert.validTo);
+  }
+}

apps/gateway/src/federation/federation-admin.dto.ts

@@ -0,0 +1,39 @@
+/**
+ * DTOs for the federation admin controller (FED-M2-08).
+ */
+
+import { IsInt, IsNotEmpty, IsOptional, IsString, IsUrl, Max, Min } from 'class-validator';
+
+export class CreatePeerKeypairDto {
+  @IsString()
+  @IsNotEmpty()
+  commonName!: string;
+
+  @IsString()
+  @IsNotEmpty()
+  displayName!: string;
+
+  @IsOptional()
+  @IsUrl()
+  endpointUrl?: string;
+}
+
+export class StorePeerCertDto {
+  @IsString()
+  @IsNotEmpty()
+  certPem!: string;
+}
+
+export class GenerateEnrollmentTokenDto {
+  @IsOptional()
+  @IsInt()
+  @Min(60)
+  @Max(900)
+  ttlSeconds: number = 900;
+}
+
+export class RevokeGrantBodyDto {
+  @IsOptional()
+  @IsString()
+  reason?: string;
+}

apps/gateway/src/federation/federation.controller.ts

@@ -0,0 +1,266 @@
+/**
+ * FederationController — admin REST API for federation management (FED-M2-08).
+ *
+ * Routes (all under /api/admin/federation, all require AdminGuard):
+ *
+ *   Grant management:
+ *     POST   /api/admin/federation/grants
+ *     GET    /api/admin/federation/grants
+ *     GET    /api/admin/federation/grants/:id
+ *     PATCH  /api/admin/federation/grants/:id/revoke
+ *     POST   /api/admin/federation/grants/:id/tokens
+ *
+ *   Peer management:
+ *     GET    /api/admin/federation/peers
+ *     POST   /api/admin/federation/peers/keypair
+ *     PATCH  /api/admin/federation/peers/:id/cert
+ *
+ * NOTE: The enrollment REDEMPTION endpoint (POST /api/federation/enrollment/:token)
+ * is handled by EnrollmentController — not duplicated here.
+ */
+
+import {
+  Body,
+  Controller,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Inject,
+  NotFoundException,
+  Param,
+  Patch,
+  Post,
+  Query,
+  UseGuards,
+} from '@nestjs/common';
+import { webcrypto } from 'node:crypto';
+import { X509Certificate } from 'node:crypto';
+import { Pkcs10CertificateRequestGenerator } from '@peculiar/x509';
+import { type Db, eq, federationPeers } from '@mosaicstack/db';
+import { DB } from '../database/database.module.js';
+import { AdminGuard } from '../admin/admin.guard.js';
+import { GrantsService } from './grants.service.js';
+import { EnrollmentService } from './enrollment.service.js';
+import { sealClientKey } from './peer-key.util.js';
+import { CreateGrantDto, ListGrantsDto } from './grants.dto.js';
+import {
+  CreatePeerKeypairDto,
+  GenerateEnrollmentTokenDto,
+  RevokeGrantBodyDto,
+  StorePeerCertDto,
+} from './federation-admin.dto.js';
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+/**
+ * Convert an ArrayBuffer to a Base64 string (for PEM encoding).
+ */
+function arrayBufferToBase64(buf: ArrayBuffer): string {
+  const bytes = new Uint8Array(buf);
+  let binary = '';
+  for (const b of bytes) {
+    binary += String.fromCharCode(b);
+  }
+  return Buffer.from(binary, 'binary').toString('base64');
+}
+
+/**
+ * Wrap a Base64 string in PEM armour.
+ */
+function toPem(label: string, b64: string): string {
+  const lines = b64.match(/.{1,64}/g) ?? [];
+  return `-----BEGIN ${label}-----\n${lines.join('\n')}\n-----END ${label}-----\n`;
+}
+
+// ---------------------------------------------------------------------------
+// Controller
+// ---------------------------------------------------------------------------
+
+@Controller('api/admin/federation')
+@UseGuards(AdminGuard)
+export class FederationController {
+  constructor(
+    @Inject(DB) private readonly db: Db,
+    @Inject(GrantsService) private readonly grantsService: GrantsService,
+    @Inject(EnrollmentService) private readonly enrollmentService: EnrollmentService,
+  ) {}
+
+  // ─── Grant management ────────────────────────────────────────────────────
+
+  /**
+   * POST /api/admin/federation/grants
+   * Create a new grant in pending state.
+   */
+  @Post('grants')
+  @HttpCode(HttpStatus.CREATED)
+  async createGrant(@Body() body: CreateGrantDto) {
+    return this.grantsService.createGrant(body);
+  }
+
+  /**
+   * GET /api/admin/federation/grants
+   * List grants with optional filters.
+   */
+  @Get('grants')
+  async listGrants(@Query() query: ListGrantsDto) {
+    return this.grantsService.listGrants(query);
+  }
+
+  /**
+   * GET /api/admin/federation/grants/:id
+   * Get a single grant by ID.
+   */
+  @Get('grants/:id')
+  async getGrant(@Param('id') id: string) {
+    return this.grantsService.getGrant(id);
+  }
+
+  /**
+   * PATCH /api/admin/federation/grants/:id/revoke
+   * Revoke an active grant.
+   */
+  @Patch('grants/:id/revoke')
+  async revokeGrant(@Param('id') id: string, @Body() body: RevokeGrantBodyDto) {
+    return this.grantsService.revokeGrant(id, body.reason);
+  }
+
+  /**
+   * POST /api/admin/federation/grants/:id/tokens
+   * Generate a single-use enrollment token for a pending grant.
+   * Returns the token plus an enrollmentUrl the operator shares out-of-band.
+   */
+  @Post('grants/:id/tokens')
+  @HttpCode(HttpStatus.CREATED)
+  async generateToken(@Param('id') id: string, @Body() body: GenerateEnrollmentTokenDto) {
+    const grant = await this.grantsService.getGrant(id);
+
+    const result = await this.enrollmentService.createToken({
+      grantId: id,
+      peerId: grant.peerId,
+      ttlSeconds: body.ttlSeconds ?? 900,
+    });
+
+    const baseUrl = process.env['BETTER_AUTH_URL'] ?? 'http://localhost:14242';
+    const enrollmentUrl = `${baseUrl}/api/federation/enrollment/${result.token}`;
+
+    return {
+      token: result.token,
+      expiresAt: result.expiresAt,
+      enrollmentUrl,
+    };
+  }
+
+  // ─── Peer management ─────────────────────────────────────────────────────
+
+  /**
+   * GET /api/admin/federation/peers
+   * List all federation peer rows.
+   */
+  @Get('peers')
+  async listPeers() {
+    return this.db.select().from(federationPeers).orderBy(federationPeers.commonName);
+  }
+
+  /**
+   * POST /api/admin/federation/peers/keypair
+   * Generate a new peer entry with EC P-256 key pair and a PKCS#10 CSR.
+   *
+   * Flow:
+   *  1. Generate EC P-256 key pair via webcrypto
+   *  2. Generate a self-signed CSR via @peculiar/x509
+   *  3. Export private key as PEM
+   *  4. sealClientKey(privatePem) → sealed blob
+   *  5. Insert pending peer row
+   *  6. Return { peerId, csrPem }
+   */
+  @Post('peers/keypair')
+  @HttpCode(HttpStatus.CREATED)
+  async createPeerKeypair(@Body() body: CreatePeerKeypairDto) {
+    // 1. Generate EC P-256 key pair via Web Crypto
+    const keyPair = await webcrypto.subtle.generateKey(
+      { name: 'ECDSA', namedCurve: 'P-256' },
+      true, // extractable
+      ['sign', 'verify'],
+    );
+
+    // 2. Generate PKCS#10 CSR
+    const csr = await Pkcs10CertificateRequestGenerator.create({
+      name: `CN=${body.commonName}`,
+      keys: keyPair,
+      signingAlgorithm: { name: 'ECDSA', hash: 'SHA-256' },
+    });
+
+    const csrPem = csr.toString('pem');
+
+    // 3. Export private key as PKCS#8 PEM
+    const pkcs8Der = await webcrypto.subtle.exportKey('pkcs8', keyPair.privateKey);
+    const privatePem = toPem('PRIVATE KEY', arrayBufferToBase64(pkcs8Der));
+
+    // 4. Seal the private key
+    const sealed = sealClientKey(privatePem);
+
+    // 5. Insert pending peer row
+    const [peer] = await this.db
+      .insert(federationPeers)
+      .values({
+        commonName: body.commonName,
+        displayName: body.displayName,
+        certPem: '',
+        certSerial: 'pending',
+        certNotAfter: new Date(0),
+        clientKeyPem: sealed,
+        state: 'pending',
+        endpointUrl: body.endpointUrl,
+      })
+      .returning();
+
+    return {
+      peerId: peer!.id,
+      csrPem,
+    };
+  }
+
+  /**
+   * PATCH /api/admin/federation/peers/:id/cert
+   * Store a signed certificate after enrollment completes.
+   *
+   * Flow:
+   *  1. Parse the cert to extract serial and notAfter
+   *  2. Update the peer row with cert data + state='active'
+   *  3. Return the updated peer row
+   */
+  @Patch('peers/:id/cert')
+  async storePeerCert(@Param('id') id: string, @Body() body: StorePeerCertDto) {
+    // Ensure peer exists
+    const [existing] = await this.db
+      .select({ id: federationPeers.id })
+      .from(federationPeers)
+      .where(eq(federationPeers.id, id))
+      .limit(1);
+
+    if (!existing) {
+      throw new NotFoundException(`Peer ${id} not found`);
+    }
+
+    // 1. Parse cert
+    const x509 = new X509Certificate(body.certPem);
+    const certSerial = x509.serialNumber;
+    const certNotAfter = new Date(x509.validTo);
+
+    // 2. Update peer
+    const [updated] = await this.db
+      .update(federationPeers)
+      .set({
+        certPem: body.certPem,
+        certSerial,
+        certNotAfter,
+        state: 'active',
+      })
+      .where(eq(federationPeers.id, id))
+      .returning();
+
+    return updated;
+  }
+}

apps/gateway/src/federation/federation.module.ts

@@ -0,0 +1,38 @@
+import { Module } from '@nestjs/common';
+import { AdminGuard } from '../admin/admin.guard.js';
+import { CaService } from './ca.service.js';
+import { EnrollmentController } from './enrollment.controller.js';
+import { EnrollmentService } from './enrollment.service.js';
+import { FederationController } from './federation.controller.js';
+import { CapabilitiesController } from './server/verbs/capabilities.controller.js';
+import { GrantsService } from './grants.service.js';
+import { FederationClientService, QuerySourceService } from './client/index.js';
+import { FederationAuthGuard, FederationScopeService } from './server/index.js';
+import { ListController } from './server/verbs/list.controller.js';
+import { FederationListQueryService } from './server/verbs/list-query.service.js';
+
+@Module({
+  controllers: [EnrollmentController, FederationController, CapabilitiesController, ListController],
+  providers: [
+    AdminGuard,
+    CaService,
+    EnrollmentService,
+    GrantsService,
+    FederationClientService,
+    QuerySourceService,
+    FederationAuthGuard,
+    FederationScopeService,
+    FederationListQueryService,
+  ],
+  exports: [
+    CaService,
+    EnrollmentService,
+    GrantsService,
+    FederationClientService,
+    QuerySourceService,
+    FederationAuthGuard,
+    FederationScopeService,
+    FederationListQueryService,
+  ],
+})
+export class FederationModule {}

apps/gateway/src/federation/grants.dto.ts

@@ -0,0 +1,36 @@
+import { IsDateString, IsIn, IsObject, IsOptional, IsString, IsUUID } from 'class-validator';
+
+export class CreateGrantDto {
+  @IsUUID()
+  peerId!: string;
+
+  @IsUUID()
+  subjectUserId!: string;
+
+  @IsObject()
+  scope!: Record<string, unknown>;
+
+  @IsOptional()
+  @IsDateString()
+  expiresAt?: string;
+}
+
+export class ListGrantsDto {
+  @IsOptional()
+  @IsUUID()
+  peerId?: string;
+
+  @IsOptional()
+  @IsUUID()
+  subjectUserId?: string;
+
+  @IsOptional()
+  @IsIn(['pending', 'active', 'revoked', 'expired'])
+  status?: 'pending' | 'active' | 'revoked' | 'expired';
+}
+
+export class RevokeGrantDto {
+  @IsOptional()
+  @IsString()
+  reason?: string;
+}

apps/gateway/src/federation/grants.service.ts

@@ -0,0 +1,190 @@
+/**
+ * Federation grants service — CRUD + status transitions (FED-M2-06).
+ *
+ * Business logic only. CSR/cert work is handled by M2-07.
+ *
+ * Status lifecycle:
+ *   pending → active   (activateGrant, called by M2-07 enrollment controller after cert signed)
+ *   active  → revoked  (revokeGrant)
+ *   active  → expired  (expireGrant, called by M6 scheduler)
+ */
+
+import { ConflictException, Inject, Injectable, NotFoundException } from '@nestjs/common';
+import { type Db, and, eq, federationGrants, federationPeers } from '@mosaicstack/db';
+import { DB } from '../database/database.module.js';
+import { parseFederationScope } from './scope-schema.js';
+import type { CreateGrantDto, ListGrantsDto } from './grants.dto.js';
+
+export type Grant = typeof federationGrants.$inferSelect;
+export type Peer = typeof federationPeers.$inferSelect;
+export type GrantWithPeer = Grant & { peer: Peer };
+
+@Injectable()
+export class GrantsService {
+  constructor(@Inject(DB) private readonly db: Db) {}
+
+  /**
+   * Create a new grant in `pending` state.
+   * Validates the scope against the federation scope JSON schema before inserting.
+   */
+  async createGrant(dto: CreateGrantDto): Promise<Grant> {
+    // Throws FederationScopeError (a plain Error subclass) on invalid scope.
+    parseFederationScope(dto.scope);
+
+    const [grant] = await this.db
+      .insert(federationGrants)
+      .values({
+        peerId: dto.peerId,
+        subjectUserId: dto.subjectUserId,
+        scope: dto.scope,
+        status: 'pending',
+        expiresAt: dto.expiresAt != null ? new Date(dto.expiresAt) : null,
+      })
+      .returning();
+
+    return grant!;
+  }
+
+  /**
+   * Fetch a single grant by ID. Throws NotFoundException if not found.
+   */
+  async getGrant(id: string): Promise<Grant> {
+    const [grant] = await this.db
+      .select()
+      .from(federationGrants)
+      .where(eq(federationGrants.id, id))
+      .limit(1);
+
+    if (!grant) {
+      throw new NotFoundException(`Grant ${id} not found`);
+    }
+
+    return grant;
+  }
+
+  /**
+   * Fetch a single grant by ID, joined with its associated peer row.
+   * Used by FederationAuthGuard to perform grant status + cert serial checks
+   * in a single DB round-trip.
+   *
+   * Throws NotFoundException if the grant does not exist.
+   * Throws NotFoundException if the associated peer row is missing (data integrity issue).
+   */
+  async getGrantWithPeer(id: string): Promise<GrantWithPeer> {
+    const rows = await this.db
+      .select()
+      .from(federationGrants)
+      .innerJoin(federationPeers, eq(federationGrants.peerId, federationPeers.id))
+      .where(eq(federationGrants.id, id))
+      .limit(1);
+
+    const row = rows[0];
+    if (!row) {
+      throw new NotFoundException(`Grant ${id} not found`);
+    }
+
+    return {
+      ...row.federation_grants,
+      peer: row.federation_peers,
+    };
+  }
+
+  /**
+   * List grants with optional filters for peerId, subjectUserId, and status.
+   */
+  async listGrants(filters: ListGrantsDto): Promise<Grant[]> {
+    const conditions = [];
+
+    if (filters.peerId != null) {
+      conditions.push(eq(federationGrants.peerId, filters.peerId));
+    }
+    if (filters.subjectUserId != null) {
+      conditions.push(eq(federationGrants.subjectUserId, filters.subjectUserId));
+    }
+    if (filters.status != null) {
+      conditions.push(eq(federationGrants.status, filters.status));
+    }
+
+    if (conditions.length === 0) {
+      return this.db.select().from(federationGrants);
+    }
+
+    return this.db
+      .select()
+      .from(federationGrants)
+      .where(and(...conditions));
+  }
+
+  /**
+   * Transition a grant from `pending` → `active`.
+   * Called by M2-07 enrollment controller after cert is signed.
+   * Throws ConflictException if the grant is not in `pending` state.
+   */
+  async activateGrant(id: string): Promise<Grant> {
+    const grant = await this.getGrant(id);
+
+    if (grant.status !== 'pending') {
+      throw new ConflictException(
+        `Grant ${id} cannot be activated: expected status 'pending', got '${grant.status}'`,
+      );
+    }
+
+    const [updated] = await this.db
+      .update(federationGrants)
+      .set({ status: 'active' })
+      .where(eq(federationGrants.id, id))
+      .returning();
+
+    return updated!;
+  }
+
+  /**
+   * Transition a grant from `active` → `revoked`.
+   * Sets revokedAt and optionally revokedReason.
+   * Throws ConflictException if the grant is not in `active` state.
+   */
+  async revokeGrant(id: string, reason?: string): Promise<Grant> {
+    const grant = await this.getGrant(id);
+
+    if (grant.status !== 'active') {
+      throw new ConflictException(
+        `Grant ${id} cannot be revoked: expected status 'active', got '${grant.status}'`,
+      );
+    }
+
+    const [updated] = await this.db
+      .update(federationGrants)
+      .set({
+        status: 'revoked',
+        revokedAt: new Date(),
+        revokedReason: reason ?? null,
+      })
+      .where(eq(federationGrants.id, id))
+      .returning();
+
+    return updated!;
+  }
+
+  /**
+   * Transition a grant from `active` → `expired`.
+   * Intended for use by the M6 scheduler.
+   * Throws ConflictException if the grant is not in `active` state.
+   */
+  async expireGrant(id: string): Promise<Grant> {
+    const grant = await this.getGrant(id);
+
+    if (grant.status !== 'active') {
+      throw new ConflictException(
+        `Grant ${id} cannot be expired: expected status 'active', got '${grant.status}'`,
+      );
+    }
+
+    const [updated] = await this.db
+      .update(federationGrants)
+      .set({ status: 'expired' })
+      .where(eq(federationGrants.id, id))
+      .returning();
+
+    return updated!;
+  }
+}

apps/gateway/src/federation/oid.util.ts

@@ -0,0 +1,146 @@
+/**
+ * Shared OID extraction helpers for Mosaic federation certificates.
+ *
+ * Custom OID registry (PRD §6, docs/federation/SETUP.md):
+ *   1.3.6.1.4.1.99999.1  — mosaic_grant_id
+ *   1.3.6.1.4.1.99999.2  — mosaic_subject_user_id
+ *
+ * The encoding convention: each extension value is an OCTET STRING wrapping
+ * an ASN.1 UTF8String TLV:
+ *   0x0C (tag) + 1-byte length + UTF-8 bytes
+ *
+ * CaService encodes values this way via encodeUtf8String(), and this module
+ * decodes them with the corresponding `.slice(2)` to skip tag + length byte.
+ *
+ * This module is intentionally pure — no NestJS, no DB, no network I/O.
+ */
+
+import { X509Certificate } from '@peculiar/x509';
+
+// ---------------------------------------------------------------------------
+// OID constants
+// ---------------------------------------------------------------------------
+
+export const OID_MOSAIC_GRANT_ID = '1.3.6.1.4.1.99999.1';
+export const OID_MOSAIC_SUBJECT_USER_ID = '1.3.6.1.4.1.99999.2';
+
+// ---------------------------------------------------------------------------
+// Extraction result types
+// ---------------------------------------------------------------------------
+
+export interface MosaicOids {
+  grantId: string;
+  subjectUserId: string;
+}
+
+export type OidExtractionResult =
+  | { ok: true; value: MosaicOids }
+  | {
+      ok: false;
+      error: 'MISSING_GRANT_ID' | 'MISSING_SUBJECT_USER_ID' | 'PARSE_ERROR';
+      detail?: string;
+    };
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+const decoder = new TextDecoder();
+
+/**
+ * Decode an extension value encoded as ASN.1 UTF8String TLV
+ * (tag 0x0C + 1-byte length + UTF-8 bytes).
+ * Validates tag, length byte, and buffer bounds before decoding.
+ * Throws a descriptive Error on malformed input; caller wraps in try/catch.
+ */
+function decodeUtf8StringTlv(value: ArrayBuffer): string {
+  const bytes = new Uint8Array(value);
+
+  // Need at least tag + length bytes
+  if (bytes.length < 2) {
+    throw new Error(`UTF8String TLV too short: expected at least 2 bytes, got ${bytes.length}`);
+  }
+
+  // Tag byte must be 0x0C (ASN.1 UTF8String)
+  if (bytes[0] !== 0x0c) {
+    throw new Error(
+      `UTF8String TLV tag mismatch: expected 0x0C, got 0x${bytes[0]!.toString(16).toUpperCase()}`,
+    );
+  }
+
+  // Only single-byte length form is supported (values 0–127); long form not needed
+  // for OID strings of this length.
+  const declaredLength = bytes[1]!;
+  if (declaredLength > 127) {
+    throw new Error(
+      `UTF8String TLV uses long-form length (0x${declaredLength.toString(16).toUpperCase()}), which is not supported`,
+    );
+  }
+
+  // Declared length must match actual remaining bytes
+  if (declaredLength !== bytes.length - 2) {
+    throw new Error(
+      `UTF8String TLV length mismatch: declared ${declaredLength}, actual ${bytes.length - 2}`,
+    );
+  }
+
+  // Skip: tag (1 byte) + length (1 byte)
+  return decoder.decode(bytes.slice(2));
+}
+
+// ---------------------------------------------------------------------------
+// Public API
+// ---------------------------------------------------------------------------
+
+/**
+ * Extract Mosaic custom OIDs (grantId, subjectUserId) from an X.509 certificate
+ * already parsed via @peculiar/x509.
+ *
+ * Returns `{ ok: true, value: MosaicOids }` on success, or
+ * `{ ok: false, error: <code>, detail? }` on any failure — never throws.
+ */
+export function extractMosaicOids(cert: X509Certificate): OidExtractionResult {
+  try {
+    const grantIdExt = cert.getExtension(OID_MOSAIC_GRANT_ID);
+    if (!grantIdExt) {
+      return { ok: false, error: 'MISSING_GRANT_ID' };
+    }
+
+    const subjectUserIdExt = cert.getExtension(OID_MOSAIC_SUBJECT_USER_ID);
+    if (!subjectUserIdExt) {
+      return { ok: false, error: 'MISSING_SUBJECT_USER_ID' };
+    }
+
+    const grantId = decodeUtf8StringTlv(grantIdExt.value);
+    const subjectUserId = decodeUtf8StringTlv(subjectUserIdExt.value);
+
+    return {
+      ok: true,
+      value: { grantId, subjectUserId },
+    };
+  } catch (err) {
+    return {
+      ok: false,
+      error: 'PARSE_ERROR',
+      detail: err instanceof Error ? err.message : String(err),
+    };
+  }
+}
+
+/**
+ * Parse a PEM-encoded certificate and extract Mosaic OIDs.
+ * Returns an OidExtractionResult — never throws.
+ */
+export function extractMosaicOidsFromPem(certPem: string): OidExtractionResult {
+  let cert: X509Certificate;
+  try {
+    cert = new X509Certificate(certPem);
+  } catch (err) {
+    return {
+      ok: false,
+      error: 'PARSE_ERROR',
+      detail: err instanceof Error ? err.message : String(err),
+    };
+  }
+  return extractMosaicOids(cert);
+}

apps/gateway/src/federation/peer-key.util.ts

@@ -0,0 +1,9 @@
+import { seal, unseal } from '@mosaicstack/auth';
+
+export function sealClientKey(privateKeyPem: string): string {
+  return seal(privateKeyPem);
+}
+
+export function unsealClientKey(sealedKey: string): string {
+  return unseal(sealedKey);
+}

apps/gateway/src/federation/scope-schema.spec.ts

@@ -0,0 +1,187 @@
+/**
+ * Unit tests for FederationScopeSchema and parseFederationScope.
+ *
+ * Coverage:
+ *  - Valid: minimal scope
+ *  - Valid: full PRD §8.1 example
+ *  - Valid: resources + excluded_resources (no overlap)
+ *  - Invalid: empty resources
+ *  - Invalid: unknown resource value
+ *  - Invalid: resources / excluded_resources intersection
+ *  - Invalid: filter key not in resources
+ *  - Invalid: max_rows_per_query = 0
+ *  - Invalid: max_rows_per_query = 10001
+ *  - Invalid: not an object / null
+ *  - Defaults: include_personal defaults to true; excluded_resources defaults to []
+ *  - Sentinel: console.warn fires for sensitive resources
+ */
+
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import {
+  parseFederationScope,
+  FederationScopeError,
+  FederationScopeSchema,
+} from './scope-schema.js';
+
+afterEach(() => {
+  vi.restoreAllMocks();
+});
+
+describe('parseFederationScope — valid inputs', () => {
+  it('accepts a minimal scope (resources + max_rows_per_query only)', () => {
+    const scope = parseFederationScope({
+      resources: ['tasks'],
+      max_rows_per_query: 100,
+    });
+    expect(scope.resources).toEqual(['tasks']);
+    expect(scope.max_rows_per_query).toBe(100);
+    expect(scope.excluded_resources).toEqual([]);
+    expect(scope.filters).toBeUndefined();
+  });
+
+  it('accepts the full PRD §8.1 example', () => {
+    const scope = parseFederationScope({
+      resources: ['tasks', 'notes', 'memory'],
+      filters: {
+        tasks: { include_teams: ['team_uuid_1', 'team_uuid_2'], include_personal: true },
+        notes: { include_personal: true, include_teams: [] },
+        memory: { include_personal: true },
+      },
+      excluded_resources: ['credentials', 'api_keys'],
+      max_rows_per_query: 500,
+    });
+    expect(scope.resources).toEqual(['tasks', 'notes', 'memory']);
+    expect(scope.excluded_resources).toEqual(['credentials', 'api_keys']);
+    expect(scope.filters?.tasks?.include_teams).toEqual(['team_uuid_1', 'team_uuid_2']);
+    expect(scope.max_rows_per_query).toBe(500);
+  });
+
+  it('accepts a scope with excluded_resources and no filter overlap', () => {
+    const scope = parseFederationScope({
+      resources: ['tasks', 'notes'],
+      excluded_resources: ['memory'],
+      max_rows_per_query: 250,
+    });
+    expect(scope.resources).toEqual(['tasks', 'notes']);
+    expect(scope.excluded_resources).toEqual(['memory']);
+  });
+});
+
+describe('parseFederationScope — defaults', () => {
+  it('defaults excluded_resources to []', () => {
+    const scope = parseFederationScope({ resources: ['tasks'], max_rows_per_query: 1 });
+    expect(scope.excluded_resources).toEqual([]);
+  });
+
+  it('defaults include_personal to true when filter is provided without it', () => {
+    const scope = parseFederationScope({
+      resources: ['tasks'],
+      filters: { tasks: { include_teams: ['t1'] } },
+      max_rows_per_query: 10,
+    });
+    expect(scope.filters?.tasks?.include_personal).toBe(true);
+  });
+});
+
+describe('parseFederationScope — invalid inputs', () => {
+  it('throws FederationScopeError for empty resources array', () => {
+    expect(() => parseFederationScope({ resources: [], max_rows_per_query: 100 })).toThrow(
+      FederationScopeError,
+    );
+  });
+
+  it('throws for unknown resource value in resources', () => {
+    expect(() =>
+      parseFederationScope({ resources: ['unknown_resource'], max_rows_per_query: 100 }),
+    ).toThrow(FederationScopeError);
+  });
+
+  it('throws when resources and excluded_resources intersect', () => {
+    expect(() =>
+      parseFederationScope({
+        resources: ['tasks', 'memory'],
+        excluded_resources: ['memory'],
+        max_rows_per_query: 100,
+      }),
+    ).toThrow(FederationScopeError);
+  });
+
+  it('throws when filters references a resource not in resources', () => {
+    expect(() =>
+      parseFederationScope({
+        resources: ['tasks'],
+        filters: { notes: { include_personal: true } },
+        max_rows_per_query: 100,
+      }),
+    ).toThrow(FederationScopeError);
+  });
+
+  it('throws for max_rows_per_query = 0', () => {
+    expect(() => parseFederationScope({ resources: ['tasks'], max_rows_per_query: 0 })).toThrow(
+      FederationScopeError,
+    );
+  });
+
+  it('throws for max_rows_per_query = 10001', () => {
+    expect(() => parseFederationScope({ resources: ['tasks'], max_rows_per_query: 10001 })).toThrow(
+      FederationScopeError,
+    );
+  });
+
+  it('throws for null input', () => {
+    expect(() => parseFederationScope(null)).toThrow(FederationScopeError);
+  });
+
+  it('throws for non-object input (string)', () => {
+    expect(() => parseFederationScope('not-an-object')).toThrow(FederationScopeError);
+  });
+});
+
+describe('parseFederationScope — sentinel warning', () => {
+  it('emits console.warn when resources includes "credentials"', () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+    parseFederationScope({
+      resources: ['tasks', 'credentials'],
+      max_rows_per_query: 100,
+    });
+    expect(warnSpy).toHaveBeenCalledWith(
+      expect.stringContaining(
+        '[FederationScope] WARNING: scope grants sensitive resource "credentials"',
+      ),
+    );
+  });
+
+  it('emits console.warn when resources includes "api_keys"', () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+    parseFederationScope({
+      resources: ['tasks', 'api_keys'],
+      max_rows_per_query: 100,
+    });
+    expect(warnSpy).toHaveBeenCalledWith(
+      expect.stringContaining(
+        '[FederationScope] WARNING: scope grants sensitive resource "api_keys"',
+      ),
+    );
+  });
+
+  it('does NOT emit console.warn for non-sensitive resources', () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+    parseFederationScope({ resources: ['tasks', 'notes', 'memory'], max_rows_per_query: 100 });
+    expect(warnSpy).not.toHaveBeenCalled();
+  });
+});
+
+describe('FederationScopeSchema — boundary values', () => {
+  it('accepts max_rows_per_query = 1 (lower bound)', () => {
+    const result = FederationScopeSchema.safeParse({ resources: ['tasks'], max_rows_per_query: 1 });
+    expect(result.success).toBe(true);
+  });
+
+  it('accepts max_rows_per_query = 10000 (upper bound)', () => {
+    const result = FederationScopeSchema.safeParse({
+      resources: ['tasks'],
+      max_rows_per_query: 10000,
+    });
+    expect(result.success).toBe(true);
+  });
+});

apps/gateway/src/federation/scope-schema.ts

@@ -0,0 +1,147 @@
+/**
+ * Federation grant scope schema and validator.
+ *
+ * Source of truth: docs/federation/PRD.md §8.1
+ *
+ * This module is intentionally pure — no DB, no NestJS, no CA wiring.
+ * It is reusable from grant CRUD (M2-06) and scope enforcement (M3+).
+ */
+
+import { z } from 'zod';
+
+// ---------------------------------------------------------------------------
+// Allowlist of federation resources (canonical — M3+ will extend this list)
+// ---------------------------------------------------------------------------
+export const FEDERATION_RESOURCE_VALUES = [
+  'tasks',
+  'notes',
+  'memory',
+  'credentials',
+  'api_keys',
+] as const;
+
+export type FederationResource = (typeof FEDERATION_RESOURCE_VALUES)[number];
+
+/**
+ * Sensitive resources require explicit admin approval (PRD §8.4).
+ * The parser warns when these appear in `resources`; M2-06 grant CRUD
+ * will add a hard gate on top of this warning.
+ */
+const SENSITIVE_RESOURCES: ReadonlySet<FederationResource> = new Set(['credentials', 'api_keys']);
+
+// ---------------------------------------------------------------------------
+// Sub-schemas
+// ---------------------------------------------------------------------------
+
+const ResourceArraySchema = z
+  .array(z.enum(FEDERATION_RESOURCE_VALUES))
+  .nonempty({ message: 'resources must contain at least one value' })
+  .refine((arr) => new Set(arr).size === arr.length, {
+    message: 'resources must not contain duplicate values',
+  });
+
+const ResourceFilterSchema = z.object({
+  include_teams: z.array(z.string()).optional(),
+  include_personal: z.boolean().default(true),
+});
+
+// ---------------------------------------------------------------------------
+// Top-level schema
+// ---------------------------------------------------------------------------
+
+export const FederationScopeSchema = z
+  .object({
+    resources: ResourceArraySchema,
+
+    excluded_resources: z
+      .array(z.enum(FEDERATION_RESOURCE_VALUES))
+      .default([])
+      .refine((arr) => new Set(arr).size === arr.length, {
+        message: 'excluded_resources must not contain duplicate values',
+      }),
+
+    filters: z.record(z.string(), ResourceFilterSchema).optional(),
+
+    max_rows_per_query: z
+      .number()
+      .int({ message: 'max_rows_per_query must be an integer' })
+      .min(1, { message: 'max_rows_per_query must be at least 1' })
+      .max(10000, { message: 'max_rows_per_query must be at most 10000' }),
+  })
+  .superRefine((data, ctx) => {
+    const resourceSet = new Set(data.resources);
+
+    // Intersection guard: a resource cannot be both granted and excluded
+    for (const r of data.excluded_resources) {
+      if (resourceSet.has(r)) {
+        ctx.addIssue({
+          code: z.ZodIssueCode.custom,
+          message: `Resource "${r}" appears in both resources and excluded_resources`,
+          path: ['excluded_resources'],
+        });
+      }
+    }
+
+    // Filter keys must be a subset of resources
+    if (data.filters) {
+      for (const key of Object.keys(data.filters)) {
+        if (!resourceSet.has(key as FederationResource)) {
+          ctx.addIssue({
+            code: z.ZodIssueCode.custom,
+            message: `filters key "${key}" references a resource not present in resources`,
+            path: ['filters', key],
+          });
+        }
+      }
+    }
+  });
+
+export type FederationScope = z.infer<typeof FederationScopeSchema>;
+
+// ---------------------------------------------------------------------------
+// Error class
+// ---------------------------------------------------------------------------
+
+export class FederationScopeError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = 'FederationScopeError';
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Typed parser
+// ---------------------------------------------------------------------------
+
+/**
+ * Parse and validate an unknown value as a FederationScope.
+ *
+ * Throws `FederationScopeError` with aggregated Zod issues on failure.
+ *
+ * Emits `console.warn` when sensitive resources (`credentials`, `api_keys`)
+ * are present in `resources` — per PRD §8.4, these require explicit admin
+ * approval. M2-06 grant CRUD will add a hard gate on top of this warning.
+ */
+export function parseFederationScope(input: unknown): FederationScope {
+  const result = FederationScopeSchema.safeParse(input);
+
+  if (!result.success) {
+    const issues = result.error.issues
+      .map((e) => `  - [${e.path.join('.') || 'root'}] ${e.message}`)
+      .join('\n');
+    throw new FederationScopeError(`Invalid federation scope:\n${issues}`);
+  }
+
+  const scope = result.data;
+
+  // Sentinel warning for sensitive resources (PRD §8.4)
+  for (const resource of scope.resources) {
+    if (SENSITIVE_RESOURCES.has(resource)) {
+      console.warn(
+        `[FederationScope] WARNING: scope grants sensitive resource "${resource}". Per PRD §8.4 this requires explicit admin approval and is logged.`,
+      );
+    }
+  }
+
+  return scope;
+}

apps/gateway/src/federation/server/__tests__/federation-auth.guard.spec.ts

@@ -0,0 +1,521 @@
+/**
+ * Unit tests for FederationAuthGuard (FED-M3-03).
+ *
+ * Coverage:
+ *  - Missing cert (no TLS socket / no getPeerCertificate) → 401
+ *  - Cert parse failure (corrupt DER raw bytes) → 401
+ *  - Missing grantId OID → 401
+ *  - Missing subjectUserId OID → 401
+ *  - Grant not found (GrantsService throws NotFoundException) → 403
+ *  - Grant in `pending` status → 403
+ *  - Grant in `revoked` status → 403
+ *  - Grant in `expired` status → 403
+ *  - Cert serial mismatch → 403
+ *  - Happy path: active grant + matching cert serial → context attached, returns true
+ */
+
+import 'reflect-metadata';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import type { ExecutionContext } from '@nestjs/common';
+import { NotFoundException } from '@nestjs/common';
+import { FederationAuthGuard } from '../federation-auth.guard.js';
+import { makeMosaicIssuedCert } from '../../__tests__/helpers/test-cert.js';
+import type { GrantsService, GrantWithPeer } from '../../grants.service.js';
+
+// ---------------------------------------------------------------------------
+// Test constants
+// ---------------------------------------------------------------------------
+
+const GRANT_ID = 'a1111111-1111-1111-1111-111111111111';
+const USER_ID = 'b2222222-2222-2222-2222-222222222222';
+const PEER_ID = 'c3333333-3333-3333-3333-333333333333';
+
+// Node.js TLS serialNumber is uppercase hex (no colons)
+const CERT_SERIAL_HEX = '01';
+
+const VALID_SCOPE = { resources: ['tasks'], max_rows_per_query: 100 };
+
+// ---------------------------------------------------------------------------
+// Mock builders
+// ---------------------------------------------------------------------------
+
+/**
+ * Build a minimal GrantWithPeer-shaped mock.
+ */
+function makeGrantWithPeer(overrides: Partial<GrantWithPeer> = {}): GrantWithPeer {
+  return {
+    id: GRANT_ID,
+    peerId: PEER_ID,
+    subjectUserId: USER_ID,
+    scope: VALID_SCOPE,
+    status: 'active',
+    expiresAt: null,
+    createdAt: new Date('2026-01-01T00:00:00Z'),
+    revokedAt: null,
+    revokedReason: null,
+    peer: {
+      id: PEER_ID,
+      commonName: 'test-peer',
+      displayName: 'Test Peer',
+      certPem: '',
+      certSerial: CERT_SERIAL_HEX,
+      certNotAfter: new Date(Date.now() + 86_400_000),
+      clientKeyPem: null,
+      state: 'active',
+      endpointUrl: null,
+      lastSeenAt: null,
+      createdAt: new Date('2026-01-01T00:00:00Z'),
+      revokedAt: null,
+    },
+    ...overrides,
+  };
+}
+
+/**
+ * Build a mock ExecutionContext with a pre-built TLS peer certificate.
+ *
+ * `certPem` — PEM string to present as the raw DER cert (converted to Buffer).
+ *             Pass null to simulate "no cert presented".
+ * `certSerialHex` — serialNumber string returned by the TLS socket.
+ *                   Node.js returns uppercase hex.
+ * `hasTlsSocket` — if false, raw.socket has no getPeerCertificate (plain HTTP).
+ */
+function makeContext(opts: {
+  certPem: string | null;
+  certSerialHex?: string;
+  hasTlsSocket?: boolean;
+}): {
+  ctx: ExecutionContext;
+  statusMock: ReturnType<typeof vi.fn>;
+  sendMock: ReturnType<typeof vi.fn>;
+} {
+  const { certPem, certSerialHex = CERT_SERIAL_HEX, hasTlsSocket = true } = opts;
+
+  // Build peerCert object that Node.js TLS socket.getPeerCertificate() returns
+  let peerCert: Record<string, unknown>;
+  if (certPem === null) {
+    // Simulate no cert: Node.js returns object with empty string fields
+    peerCert = { raw: null, serialNumber: '' };
+  } else {
+    // Convert PEM to DER Buffer (strip headers + base64 decode)
+    const b64 = certPem
+      .replace(/-----BEGIN CERTIFICATE-----/, '')
+      .replace(/-----END CERTIFICATE-----/, '')
+      .replace(/\s+/g, '');
+    const raw = Buffer.from(b64, 'base64');
+    peerCert = { raw, serialNumber: certSerialHex };
+  }
+
+  const getPeerCertificate = vi.fn().mockReturnValue(peerCert);
+
+  const socket = hasTlsSocket ? { getPeerCertificate } : {}; // No getPeerCertificate → non-TLS
+
+  // Fastify reply mocks
+  const sendMock = vi.fn().mockReturnValue(undefined);
+  const headerMock = vi.fn().mockReturnValue({ send: sendMock });
+  const statusMock = vi.fn().mockReturnValue({ header: headerMock });
+
+  const request = {
+    raw: {
+      socket,
+    },
+  };
+
+  const reply = {
+    status: statusMock,
+  };
+
+  const ctx = {
+    switchToHttp: () => ({
+      getRequest: () => request,
+      getResponse: () => reply,
+    }),
+  } as unknown as ExecutionContext;
+
+  return { ctx, statusMock, sendMock };
+}
+
+/**
+ * Build a mock GrantsService.
+ */
+function makeGrantsService(
+  overrides: Partial<Pick<GrantsService, 'getGrantWithPeer'>> = {},
+): GrantsService {
+  return {
+    getGrantWithPeer: vi.fn().mockResolvedValue(makeGrantWithPeer()),
+    ...overrides,
+  } as unknown as GrantsService;
+}
+
+// ---------------------------------------------------------------------------
+// Test suite
+// ---------------------------------------------------------------------------
+
+describe('FederationAuthGuard', () => {
+  let certPem: string;
+
+  beforeEach(async () => {
+    // Generate a real Mosaic-issued cert with the standard OIDs
+    certPem = await makeMosaicIssuedCert({ grantId: GRANT_ID, subjectUserId: USER_ID });
+  });
+
+  // ── 401: No TLS socket ────────────────────────────────────────────────────
+
+  it('returns 401 when there is no TLS socket (plain HTTP connection)', async () => {
+    const { ctx, statusMock, sendMock } = makeContext({
+      certPem: certPem,
+      hasTlsSocket: false,
+    });
+
+    const guard = new FederationAuthGuard(makeGrantsService());
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(401);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'unauthorized', message: expect.any(String) }),
+      }),
+    );
+  });
+
+  // ── 401: Cert not presented ───────────────────────────────────────────────
+
+  it('returns 401 when the peer did not present a certificate', async () => {
+    const { ctx, statusMock, sendMock } = makeContext({ certPem: null });
+
+    const guard = new FederationAuthGuard(makeGrantsService());
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(401);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'unauthorized', message: expect.any(String) }),
+      }),
+    );
+  });
+
+  // ── 401: Cert parse failure ───────────────────────────────────────────────
+
+  it('returns 401 when the certificate DER bytes are corrupt', async () => {
+    // Build context with a cert that has garbage DER bytes
+    const corruptPem = '-----BEGIN CERTIFICATE-----\naW52YWxpZA==\n-----END CERTIFICATE-----';
+    const { ctx, statusMock, sendMock } = makeContext({ certPem: corruptPem });
+
+    const guard = new FederationAuthGuard(makeGrantsService());
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(401);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'unauthorized', message: expect.any(String) }),
+      }),
+    );
+  });
+
+  // ── 401: Missing grantId OID ─────────────────────────────────────────────
+
+  it('returns 401 when the cert is missing the grantId OID', async () => {
+    // makeSelfSignedCert produces a cert without any Mosaic OIDs
+    const { makeSelfSignedCert } = await import('../../__tests__/helpers/test-cert.js');
+    const plainCert = await makeSelfSignedCert();
+    const { ctx, statusMock, sendMock } = makeContext({ certPem: plainCert });
+
+    const guard = new FederationAuthGuard(makeGrantsService());
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(401);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'unauthorized', message: expect.any(String) }),
+      }),
+    );
+  });
+
+  // ── 401: Missing subjectUserId OID ───────────────────────────────────────
+
+  it('returns 401 when the cert has grantId OID but is missing subjectUserId OID', async () => {
+    // Build a cert with only the grantId OID by importing cert generator internals
+    const { webcrypto } = await import('node:crypto');
+    const {
+      X509CertificateGenerator,
+      Extension,
+      KeyUsagesExtension,
+      KeyUsageFlags,
+      BasicConstraintsExtension,
+      cryptoProvider,
+    } = await import('@peculiar/x509');
+
+    cryptoProvider.set(webcrypto as unknown as Parameters<typeof cryptoProvider.set>[0]);
+
+    const alg = { name: 'ECDSA', namedCurve: 'P-256', hash: 'SHA-256' } as const;
+    const keys = await webcrypto.subtle.generateKey(alg, false, ['sign', 'verify']);
+    const now = new Date();
+    const tomorrow = new Date(now.getTime() + 86_400_000);
+
+    // Encode grantId only — missing subjectUserId extension
+    const utf8 = new TextEncoder().encode(GRANT_ID);
+    const encoded = new Uint8Array(2 + utf8.length);
+    encoded[0] = 0x0c;
+    encoded[1] = utf8.length;
+    encoded.set(utf8, 2);
+
+    const cert = await X509CertificateGenerator.createSelfSigned({
+      serialNumber: '01',
+      name: 'CN=partial-oid-test',
+      notBefore: now,
+      notAfter: tomorrow,
+      signingAlgorithm: alg,
+      keys,
+      extensions: [
+        new BasicConstraintsExtension(false),
+        new KeyUsagesExtension(KeyUsageFlags.digitalSignature),
+        new Extension('1.3.6.1.4.1.99999.1', false, encoded), // grantId only
+      ],
+    });
+
+    const { ctx, statusMock, sendMock } = makeContext({ certPem: cert.toString('pem') });
+
+    const guard = new FederationAuthGuard(makeGrantsService());
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(401);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'unauthorized', message: expect.any(String) }),
+      }),
+    );
+  });
+
+  // ── 403: Grant not found ─────────────────────────────────────────────────
+
+  it('returns 403 when the grantId from the cert does not exist in DB', async () => {
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi
+        .fn()
+        .mockRejectedValue(new NotFoundException(`Grant ${GRANT_ID} not found`)),
+    });
+
+    const { ctx, statusMock, sendMock } = makeContext({ certPem });
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(403);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'forbidden', message: 'Federation access denied' }),
+      }),
+    );
+  });
+
+  // ── 403: Grant in `pending` status ───────────────────────────────────────
+
+  it('returns 403 when the grant is in pending status', async () => {
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi.fn().mockResolvedValue(makeGrantWithPeer({ status: 'pending' })),
+    });
+
+    const { ctx, statusMock, sendMock } = makeContext({ certPem });
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(403);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'forbidden', message: 'Federation access denied' }),
+      }),
+    );
+  });
+
+  // ── 403: Grant in `revoked` status ───────────────────────────────────────
+
+  it('returns 403 when the grant is in revoked status', async () => {
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi
+        .fn()
+        .mockResolvedValue(makeGrantWithPeer({ status: 'revoked', revokedAt: new Date() })),
+    });
+
+    const { ctx, statusMock, sendMock } = makeContext({ certPem });
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(403);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'forbidden', message: 'Federation access denied' }),
+      }),
+    );
+  });
+
+  // ── 403: Grant in `expired` status ───────────────────────────────────────
+
+  it('returns 403 when the grant is in expired status', async () => {
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi.fn().mockResolvedValue(makeGrantWithPeer({ status: 'expired' })),
+    });
+
+    const { ctx, statusMock, sendMock } = makeContext({ certPem });
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(403);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'forbidden', message: 'Federation access denied' }),
+      }),
+    );
+  });
+
+  // ── 403: Cert serial mismatch ─────────────────────────────────────────────
+
+  it('returns 403 when the cert serial does not match the registered peer cert serial', async () => {
+    // Return a grant whose peer has a different stored serial
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi.fn().mockResolvedValue(
+        makeGrantWithPeer({
+          peer: {
+            id: PEER_ID,
+            commonName: 'test-peer',
+            displayName: 'Test Peer',
+            certPem: '',
+            certSerial: 'DEADBEEF', // different from CERT_SERIAL_HEX='01'
+            certNotAfter: new Date(Date.now() + 86_400_000),
+            clientKeyPem: null,
+            state: 'active',
+            endpointUrl: null,
+            lastSeenAt: null,
+            createdAt: new Date('2026-01-01T00:00:00Z'),
+            revokedAt: null,
+          },
+        }),
+      ),
+    });
+
+    // Context presents cert with serial '01' but DB has 'DEADBEEF'
+    const { ctx, statusMock, sendMock } = makeContext({ certPem, certSerialHex: '01' });
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(403);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'forbidden', message: 'Federation access denied' }),
+      }),
+    );
+  });
+
+  // ── 403: subjectUserId cert/DB mismatch (CRIT-1 regression test) ─────────
+
+  it('returns 403 when the cert subjectUserId does not match the DB grant subjectUserId', async () => {
+    // Build a cert that claims an attacker's subjectUserId
+    const attackerSubjectUserId = 'attacker-user-id';
+    const attackerCertPem = await makeMosaicIssuedCert({
+      grantId: GRANT_ID,
+      subjectUserId: attackerSubjectUserId,
+    });
+
+    // DB returns a grant with the legitimate USER_ID
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi.fn().mockResolvedValue(makeGrantWithPeer({ subjectUserId: USER_ID })),
+    });
+
+    // Cert presents attacker-user-id but DB has USER_ID — should be rejected
+    const { ctx, statusMock, sendMock } = makeContext({
+      certPem: attackerCertPem,
+      certSerialHex: CERT_SERIAL_HEX,
+    });
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(false);
+    expect(statusMock).toHaveBeenCalledWith(403);
+    expect(sendMock).toHaveBeenCalledWith(
+      expect.objectContaining({
+        error: expect.objectContaining({ code: 'forbidden', message: 'Federation access denied' }),
+      }),
+    );
+  });
+
+  // ── Happy path ────────────────────────────────────────────────────────────
+
+  it('returns true and attaches federationContext on happy path', async () => {
+    const grant = makeGrantWithPeer({
+      status: 'active',
+      peer: {
+        id: PEER_ID,
+        commonName: 'test-peer',
+        displayName: 'Test Peer',
+        certPem: '',
+        certSerial: CERT_SERIAL_HEX,
+        certNotAfter: new Date(Date.now() + 86_400_000),
+        clientKeyPem: null,
+        state: 'active',
+        endpointUrl: null,
+        lastSeenAt: null,
+        createdAt: new Date('2026-01-01T00:00:00Z'),
+        revokedAt: null,
+      },
+    });
+
+    const grantsService = makeGrantsService({
+      getGrantWithPeer: vi.fn().mockResolvedValue(grant),
+    });
+
+    // Build context manually to capture what gets set on request.federationContext
+    const b64 = certPem
+      .replace(/-----BEGIN CERTIFICATE-----/, '')
+      .replace(/-----END CERTIFICATE-----/, '')
+      .replace(/\s+/g, '');
+    const raw = Buffer.from(b64, 'base64');
+    const peerCert = { raw, serialNumber: CERT_SERIAL_HEX };
+
+    const sendMock = vi.fn().mockReturnValue(undefined);
+    const headerMock = vi.fn().mockReturnValue({ send: sendMock });
+    const statusMock = vi.fn().mockReturnValue({ header: headerMock });
+
+    const request: Record<string, unknown> = {
+      raw: {
+        socket: { getPeerCertificate: vi.fn().mockReturnValue(peerCert) },
+      },
+    };
+
+    const reply = { status: statusMock };
+
+    const ctx = {
+      switchToHttp: () => ({
+        getRequest: () => request,
+        getResponse: () => reply,
+      }),
+    } as unknown as ExecutionContext;
+
+    const guard = new FederationAuthGuard(grantsService);
+    const result = await guard.canActivate(ctx);
+
+    expect(result).toBe(true);
+    expect(statusMock).not.toHaveBeenCalled();
+
+    // Verify the context was attached correctly
+    expect(request['federationContext']).toEqual({
+      grantId: GRANT_ID,
+      subjectUserId: USER_ID,
+      peerId: PEER_ID,
+      scope: VALID_SCOPE,
+    });
+  });
+});

apps/gateway/src/federation/server/__tests__/scope.service.spec.ts

@@ -0,0 +1,324 @@
+/**
+ * Unit tests for FederationScopeService (FED-M3-04).
+ *
+ * Coverage:
+ *  - resource allowlist deny
+ *  - excluded resource deny
+ *  - invalid scope deny
+ *  - invalid requested limit deny
+ *  - native RBAC deny as subjectUserId
+ *  - scope/native filter intersection for personal and team rows
+ *  - native RBAC personal deny wins over scope include_personal allow/default
+ *  - max_rows_per_query cap
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { FederationScopeService, type FederationNativeRbacEvaluator } from '../scope.service.js';
+import type { FederationContext } from '../federation-context.js';
+
+const GRANT_ID = 'grant-1';
+const PEER_ID = 'peer-1';
+const SUBJECT_USER_ID = 'user-1';
+
+function makeContext(scope: Record<string, unknown>): FederationContext {
+  return {
+    grantId: GRANT_ID,
+    peerId: PEER_ID,
+    subjectUserId: SUBJECT_USER_ID,
+    scope,
+  };
+}
+
+function makeNativeRbac(
+  result: Awaited<ReturnType<FederationNativeRbacEvaluator['evaluateReadAccess']>>,
+): FederationNativeRbacEvaluator {
+  return {
+    evaluateReadAccess: vi.fn().mockResolvedValue(result),
+  };
+}
+
+describe('FederationScopeService', () => {
+  let service: FederationScopeService;
+
+  beforeEach(() => {
+    service = new FederationScopeService();
+  });
+
+  it('allows a granted resource and returns a capped query filter', async () => {
+    const nativeRbac = makeNativeRbac({
+      allowed: true,
+      access: { includePersonal: true, teamIds: ['team-1', 'team-2'] },
+    });
+
+    const result = await service.evaluateAccess({
+      context: makeContext({
+        resources: ['tasks'],
+        filters: { tasks: { include_teams: ['team-1', 'team-3'], include_personal: true } },
+        max_rows_per_query: 50,
+      }),
+      resource: 'tasks',
+      requestedLimit: 500,
+      nativeRbac,
+    });
+
+    expect(result).toEqual({
+      allowed: true,
+      filter: {
+        resource: 'tasks',
+        subjectUserId: SUBJECT_USER_ID,
+        includePersonal: true,
+        teamIds: ['team-1'],
+        limit: 50,
+        maxRowsPerQuery: 50,
+      },
+    });
+    expect(nativeRbac.evaluateReadAccess).toHaveBeenCalledWith({
+      grantId: GRANT_ID,
+      peerId: PEER_ID,
+      subjectUserId: SUBJECT_USER_ID,
+      resource: 'tasks',
+    });
+  });
+
+  it('defaults absent resource filters to native RBAC personal and team visibility', async () => {
+    const result = await service.evaluateAccess({
+      context: makeContext({ resources: ['notes'], max_rows_per_query: 100 }),
+      resource: 'notes',
+      nativeRbac: makeNativeRbac({
+        allowed: true,
+        access: { includePersonal: true, teamIds: ['team-1', 'team-2'] },
+      }),
+    });
+
+    expect(result).toMatchObject({
+      allowed: true,
+      filter: {
+        includePersonal: true,
+        teamIds: ['team-1', 'team-2'],
+        limit: 100,
+      },
+    });
+  });
+
+  it('honors include_personal false even when native RBAC allows personal rows', async () => {
+    const result = await service.evaluateAccess({
+      context: makeContext({
+        resources: ['memory'],
+        filters: { memory: { include_personal: false } },
+        max_rows_per_query: 25,
+      }),
+      resource: 'memory',
+      nativeRbac: makeNativeRbac({
+        allowed: true,
+        access: { includePersonal: true, teamIds: [] },
+      }),
+    });
+
+    expect(result).toMatchObject({
+      allowed: true,
+      filter: {
+        includePersonal: false,
+        teamIds: [],
+      },
+    });
+  });
+
+  it('does not leak personal rows when scope allows personal but native RBAC denies personal', async () => {
+    const result = await service.evaluateAccess({
+      context: makeContext({
+        resources: ['tasks'],
+        filters: { tasks: { include_personal: true } },
+        max_rows_per_query: 25,
+      }),
+      resource: 'tasks',
+      nativeRbac: makeNativeRbac({
+        allowed: true,
+        access: { includePersonal: false, teamIds: ['team-1'] },
+      }),
+    });
+
+    expect(result).toMatchObject({
+      allowed: true,
+      filter: {
+        includePersonal: false,
+        teamIds: ['team-1'],
+      },
+    });
+  });
+
+  it('does not widen native RBAC when scope includes teams the user cannot access', async () => {
+    const result = await service.evaluateAccess({
+      context: makeContext({
+        resources: ['tasks'],
+        filters: { tasks: { include_teams: ['team-2'], include_personal: false } },
+        max_rows_per_query: 25,
+      }),
+      resource: 'tasks',
+      nativeRbac: makeNativeRbac({
+        allowed: true,
+        access: { includePersonal: true, teamIds: ['team-1'] },
+      }),
+    });
+
+    expect(result).toMatchObject({
+      allowed: true,
+      filter: {
+        includePersonal: false,
+        teamIds: [],
+      },
+    });
+  });
+
+  it('denies invalid grant scope before RBAC evaluation', async () => {
+    const nativeRbac = makeNativeRbac({
+      allowed: true,
+      access: { includePersonal: true, teamIds: [] },
+    });
+
+    const result = await service.evaluateAccess({
+      context: makeContext({ resources: [], max_rows_per_query: 100 }),
+      resource: 'tasks',
+      nativeRbac,
+    });
+
+    expect(result).toMatchObject({
+      allowed: false,
+      deny: {
+        code: 'invalid_scope',
+        stage: 'scope_parse',
+        statusCode: 400,
+        grantId: GRANT_ID,
+        subjectUserId: SUBJECT_USER_ID,
+        resource: 'tasks',
+      },
+    });
+    expect(nativeRbac.evaluateReadAccess).not.toHaveBeenCalled();
+  });
+
+  it('denies unsupported resource names before RBAC evaluation', async () => {
+    const nativeRbac = makeNativeRbac({
+      allowed: true,
+      access: { includePersonal: true, teamIds: [] },
+    });
+
+    const result = await service.evaluateAccess({
+      context: makeContext({ resources: ['tasks'], max_rows_per_query: 100 }),
+      resource: 'unknown_resource',
+      nativeRbac,
+    });
+
+    expect(result).toMatchObject({
+      allowed: false,
+      deny: {
+        code: 'invalid_resource',
+        stage: 'resource_allowlist',
+        statusCode: 403,
+      },
+    });
+    expect(nativeRbac.evaluateReadAccess).not.toHaveBeenCalled();
+  });
+
+  it('denies resources explicitly present in excluded_resources before allowlist miss', async () => {
+    const nativeRbac = makeNativeRbac({
+      allowed: true,
+      access: { includePersonal: true, teamIds: [] },
+    });
+
+    const result = await service.evaluateAccess({
+      context: makeContext({
+        resources: ['tasks'],
+        excluded_resources: ['credentials'],
+        max_rows_per_query: 100,
+      }),
+      resource: 'credentials',
+      nativeRbac,
+    });
+
+    expect(result).toMatchObject({
+      allowed: false,
+      deny: {
+        code: 'resource_excluded',
+        stage: 'resource_exclusion',
+        statusCode: 403,
+        resource: 'credentials',
+      },
+    });
+    expect(nativeRbac.evaluateReadAccess).not.toHaveBeenCalled();
+  });
+
+  it('denies supported resources that are not granted by scope', async () => {
+    const nativeRbac = makeNativeRbac({
+      allowed: true,
+      access: { includePersonal: true, teamIds: [] },
+    });
+
+    const result = await service.evaluateAccess({
+      context: makeContext({ resources: ['tasks'], max_rows_per_query: 100 }),
+      resource: 'notes',
+      nativeRbac,
+    });
+
+    expect(result).toMatchObject({
+      allowed: false,
+      deny: {
+        code: 'resource_not_granted',
+        stage: 'resource_allowlist',
+        statusCode: 403,
+        resource: 'notes',
+      },
+    });
+    expect(nativeRbac.evaluateReadAccess).not.toHaveBeenCalled();
+  });
+
+  it('denies invalid requested row limits before RBAC evaluation', async () => {
+    const nativeRbac = makeNativeRbac({
+      allowed: true,
+      access: { includePersonal: true, teamIds: [] },
+    });
+
+    const result = await service.evaluateAccess({
+      context: makeContext({ resources: ['tasks'], max_rows_per_query: 100 }),
+      resource: 'tasks',
+      requestedLimit: 0,
+      nativeRbac,
+    });
+
+    expect(result).toMatchObject({
+      allowed: false,
+      deny: {
+        code: 'invalid_limit',
+        stage: 'row_cap',
+        statusCode: 400,
+        details: { requestedLimit: 0 },
+      },
+    });
+    expect(nativeRbac.evaluateReadAccess).not.toHaveBeenCalled();
+  });
+
+  it('denies when native RBAC rejects subjectUserId access to the resource', async () => {
+    const result = await service.evaluateAccess({
+      context: makeContext({ resources: ['tasks'], max_rows_per_query: 100 }),
+      resource: 'tasks',
+      nativeRbac: makeNativeRbac({
+        allowed: false,
+        reason: 'read:tasks denied',
+        details: { permission: 'tasks:read' },
+      }),
+    });
+
+    expect(result).toEqual({
+      allowed: false,
+      deny: {
+        code: 'native_rbac_denied',
+        stage: 'native_rbac',
+        statusCode: 403,
+        message: 'read:tasks denied',
+        grantId: GRANT_ID,
+        peerId: PEER_ID,
+        subjectUserId: SUBJECT_USER_ID,
+        resource: 'tasks',
+        details: { permission: 'tasks:read' },
+      },
+    });
+  });
+});

apps/gateway/src/federation/server/federation-auth.guard.ts

@@ -0,0 +1,212 @@
+/**
+ * FederationAuthGuard — NestJS CanActivate guard for inbound federation requests.
+ *
+ * Validates the mTLS client certificate presented by a peer gateway, extracts
+ * custom OIDs to identify the grant + subject user, loads the grant from DB,
+ * asserts it is active, and verifies the cert serial against the registered peer
+ * cert serial as a defense-in-depth measure.
+ *
+ * On success, attaches `request.federationContext` for downstream verb controllers.
+ * On failure, responds with the federation wire-format error envelope (not raw
+ * NestJS exception JSON) to match the federation protocol contract.
+ *
+ * ## Cert-serial check decision
+ * The guard validates that the inbound client cert's serial number matches the
+ * `certSerial` stored on the associated `federation_peers` row. This is a
+ * defense-in-depth measure: even if the mTLS handshake is compromised at the
+ * transport layer (e.g. misconfigured TLS terminator that forwards arbitrary
+ * client certs), an attacker cannot replay a cert with a different serial than
+ * what was registered during enrollment. This check is NOT loosened because:
+ *  1. It is O(1) — no additional DB round-trip (peerId is on the grant row,
+ *     so we join to federationPeers in the same query).
+ *  2. Cert renewal MUST update the stored serial — enforced by M6 scheduler.
+ *  3. The OID-only path (without serial check) would allow any cert from the
+ *     same CA bearing the same grantId OID to succeed after cert compromise.
+ *
+ * ## FastifyRequest typing path
+ * NestJS + Fastify wraps the raw Node.js IncomingMessage in a FastifyRequest.
+ * The underlying TLS socket is accessed via `request.raw.socket`, which is a
+ * `tls.TLSSocket` when the server is listening on HTTPS. In development/test
+ * the gateway may run over plain HTTP, in which case `getPeerCertificate` is
+ * not available. The guard safely handles both cases by checking for the
+ * method's existence before calling it.
+ *
+ * Note: The guard reads the peer certificate from the *already-completed*
+ * TLS handshake via `socket.getPeerCertificate(detailed=true)`. This relies
+ * on the server being configured with `requestCert: true` at the TLS level
+ * so Fastify/Node.js requests the client cert during the handshake.
+ * The guard does NOT verify the cert chain itself — that is handled by the
+ * TLS layer (Node.js `rejectUnauthorized: true` with the CA cert pinned).
+ */
+
+import {
+  type CanActivate,
+  type ExecutionContext,
+  Inject,
+  Injectable,
+  Logger,
+} from '@nestjs/common';
+import type { FastifyReply, FastifyRequest } from 'fastify';
+import * as tls from 'node:tls';
+import { X509Certificate } from '@peculiar/x509';
+import { FederationForbiddenError, FederationUnauthorizedError } from '@mosaicstack/types';
+import { extractMosaicOids } from '../oid.util.js';
+import { GrantsService } from '../grants.service.js';
+import type { FederationContext } from './federation-context.js';
+import './federation-context.js'; // side-effect import: applies FastifyRequest module augmentation
+
+// ---------------------------------------------------------------------------
+// Internal helpers
+// ---------------------------------------------------------------------------
+
+/**
+ * Send a federation wire-format error response directly on the Fastify reply.
+ * Returns false — callers return this value from canActivate.
+ */
+function sendFederationError(
+  reply: FastifyReply,
+  error: FederationUnauthorizedError | FederationForbiddenError,
+): boolean {
+  const statusCode = error.code === 'unauthorized' ? 401 : 403;
+  void reply.status(statusCode).header('content-type', 'application/json').send(error.toEnvelope());
+  return false;
+}
+
+// ---------------------------------------------------------------------------
+// Guard
+// ---------------------------------------------------------------------------
+
+@Injectable()
+export class FederationAuthGuard implements CanActivate {
+  private readonly logger = new Logger(FederationAuthGuard.name);
+
+  constructor(@Inject(GrantsService) private readonly grantsService: GrantsService) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const http = context.switchToHttp();
+    const request = http.getRequest<FastifyRequest>();
+    const reply = http.getResponse<FastifyReply>();
+
+    // ── Step 1: Extract peer certificate from TLS socket ────────────────────
+    const rawSocket = request.raw.socket;
+
+    // Check TLS socket: getPeerCertificate is only available on TLS connections.
+    if (
+      !rawSocket ||
+      typeof (rawSocket as Partial<tls.TLSSocket>).getPeerCertificate !== 'function'
+    ) {
+      this.logger.warn('No TLS socket — client cert unavailable (non-mTLS connection)');
+      return sendFederationError(
+        reply,
+        new FederationUnauthorizedError('Client certificate required'),
+      );
+    }
+
+    const tlsSocket = rawSocket as tls.TLSSocket;
+    const peerCert = tlsSocket.getPeerCertificate(true);
+
+    // Node.js returns an object with empty string fields when no cert was presented.
+    if (!peerCert || !peerCert.raw) {
+      this.logger.warn('Peer certificate not presented (mTLS handshake did not supply cert)');
+      return sendFederationError(
+        reply,
+        new FederationUnauthorizedError('Client certificate required'),
+      );
+    }
+
+    // ── Step 2: Parse the DER-encoded certificate via @peculiar/x509 ────────
+    let cert: X509Certificate;
+    try {
+      // peerCert.raw is a Buffer containing the DER-encoded cert
+      cert = new X509Certificate(peerCert.raw);
+    } catch (err) {
+      this.logger.warn(
+        `Failed to parse peer certificate: ${err instanceof Error ? err.message : String(err)}`,
+      );
+      return sendFederationError(
+        reply,
+        new FederationUnauthorizedError('Client certificate could not be parsed'),
+      );
+    }
+
+    // ── Step 3: Extract Mosaic custom OIDs ──────────────────────────────────
+    const oidResult = extractMosaicOids(cert);
+
+    if (!oidResult.ok) {
+      const message =
+        oidResult.error === 'MISSING_GRANT_ID'
+          ? 'Client certificate is missing required OID: mosaic_grant_id (1.3.6.1.4.1.99999.1)'
+          : oidResult.error === 'MISSING_SUBJECT_USER_ID'
+            ? 'Client certificate is missing required OID: mosaic_subject_user_id (1.3.6.1.4.1.99999.2)'
+            : `Client certificate OID extraction failed: ${oidResult.detail ?? 'unknown error'}`;
+      this.logger.warn(`OID extraction failure [${oidResult.error}]: ${message}`);
+      return sendFederationError(reply, new FederationUnauthorizedError(message));
+    }
+
+    const { grantId, subjectUserId } = oidResult.value;
+
+    // ── Step 4: Load grant from DB ───────────────────────────────────────────
+    let grant: Awaited<ReturnType<GrantsService['getGrantWithPeer']>>;
+    try {
+      grant = await this.grantsService.getGrantWithPeer(grantId);
+    } catch {
+      // getGrantWithPeer throws NotFoundException when not found
+      this.logger.warn(`Grant not found: ${grantId}`);
+      return sendFederationError(reply, new FederationForbiddenError('Federation access denied'));
+    }
+
+    // ── Step 5: Assert grant is active ──────────────────────────────────────
+    if (grant.status !== 'active') {
+      this.logger.warn(`Grant ${grantId} is not active — status=${grant.status}`);
+      return sendFederationError(reply, new FederationForbiddenError('Federation access denied'));
+    }
+
+    // ── Step 5b: Validate cert-extracted subjectUserId against DB (CRIT-1) ──
+    // The cert claim is untrusted input; the DB row is authoritative.
+    if (subjectUserId !== grant.subjectUserId) {
+      this.logger.warn(`subjectUserId mismatch for grant ${grantId}`);
+      return sendFederationError(reply, new FederationForbiddenError('Federation access denied'));
+    }
+
+    // ── Step 6: Defense-in-depth — cert serial must match registered peer ───
+    // The serial number from Node.js TLS is upper-case hex without colons.
+    // The @peculiar/x509 serialNumber is decimal. We compare using the native
+    // Node.js crypto cert serial which is uppercase hex, matching DB storage.
+    // Both are derived from the peerCert.serialNumber Node.js provides.
+    const inboundSerial: string = peerCert.serialNumber ?? '';
+
+    if (!grant.peer.certSerial) {
+      // Peer row exists but has no stored serial — something is wrong with enrollment
+      this.logger.error(`Peer ${grant.peerId} has no stored certSerial — enrollment incomplete`);
+      return sendFederationError(reply, new FederationForbiddenError('Federation access denied'));
+    }
+
+    // Normalize both to uppercase for comparison (Node.js serialNumber is
+    // already uppercase hex; DB value was stored from extractSerial() which
+    // returns crypto.X509Certificate.serialNumber — also uppercase hex).
+    if (inboundSerial.toUpperCase() !== grant.peer.certSerial.toUpperCase()) {
+      this.logger.warn(
+        `Cert serial mismatch for grant ${grantId}: ` +
+          `inbound=${inboundSerial} registered=${grant.peer.certSerial}`,
+      );
+      return sendFederationError(reply, new FederationForbiddenError('Federation access denied'));
+    }
+
+    // ── Step 7: Attach FederationContext to request ──────────────────────────
+    // Use grant.subjectUserId from DB (authoritative) — not the cert-extracted value.
+    const federationContext: FederationContext = {
+      grantId,
+      subjectUserId: grant.subjectUserId,
+      peerId: grant.peerId,
+      scope: grant.scope as Record<string, unknown>,
+    };
+
+    request.federationContext = federationContext;
+
+    this.logger.debug(
+      `Federation auth OK — grantId=${grantId} peerId=${grant.peerId} subjectUserId=${grant.subjectUserId}`,
+    );
+
+    return true;
+  }
+}

apps/gateway/src/federation/server/federation-context.ts

@@ -0,0 +1,39 @@
+/**
+ * FederationContext — attached to inbound federation requests after successful
+ * mTLS + grant validation by FederationAuthGuard.
+ *
+ * Downstream verb controllers access this via `request.federationContext`.
+ */
+
+/**
+ * Augment FastifyRequest so TypeScript knows about the federation context
+ * property that FederationAuthGuard attaches on success.
+ */
+declare module 'fastify' {
+  interface FastifyRequest {
+    federationContext?: FederationContext;
+  }
+}
+
+/**
+ * Typed context object attached to the request by FederationAuthGuard.
+ * Carries all data extracted from the mTLS cert + grant DB row needed
+ * by downstream federation verb handlers.
+ */
+export interface FederationContext {
+  /** The federation grant ID extracted from OID 1.3.6.1.4.1.99999.1 */
+  grantId: string;
+
+  /** The local subject user whose data is accessible under this grant */
+  subjectUserId: string;
+
+  /** The peer gateway ID (from the grant's peerId FK) */
+  peerId: string;
+
+  /**
+   * Grant scope — determines which resources the peer may query.
+   * Typed as Record<string, unknown> because the full scope schema lives in
+   * scope-schema.ts; downstream handlers should narrow via parseFederationScope.
+   */
+  scope: Record<string, unknown>;
+}

apps/gateway/src/federation/server/index.ts

@@ -0,0 +1,31 @@
+/**
+ * Federation server-side barrel — inbound request handling.
+ *
+ * Exports the mTLS auth guard and the FederationContext interface
+ * for use by verb controllers (M3-05/06/07).
+ *
+ * Usage:
+ *   import { FederationAuthGuard } from './server/index.js';
+ *   @UseGuards(FederationAuthGuard)
+ */
+
+export { FederationAuthGuard } from './federation-auth.guard.js';
+export { FederationScopeService } from './scope.service.js';
+export type { FederationContext } from './federation-context.js';
+export type {
+  FederationNativeRbacAccess,
+  FederationNativeRbacAllowedResult,
+  FederationNativeRbacDeniedResult,
+  FederationNativeRbacEvaluator,
+  FederationNativeRbacRequest,
+  FederationNativeRbacResult,
+  FederationScopeAllowedResult,
+  FederationScopeDeniedResult,
+  FederationScopeDenyCode,
+  FederationScopeDenyDetails,
+  FederationScopeDenyReason,
+  FederationScopeDenyStage,
+  FederationScopeEvaluationInput,
+  FederationScopeEvaluationResult,
+  FederationScopeQueryFilter,
+} from './scope.service.js';

apps/gateway/src/federation/server/scope.service.ts

@@ -0,0 +1,272 @@
+/**
+ * FederationScopeService — M3 server-side scope enforcement pipeline.
+ *
+ * Pure trust-boundary service: it validates the grant scope, asks an injected
+ * native RBAC evaluator what the subject user can read locally, intersects that
+ * answer with the federation scope filters, and returns a query filter for the
+ * verb controllers. The service performs no DB calls directly.
+ */
+
+import { Injectable } from '@nestjs/common';
+import {
+  FEDERATION_RESOURCE_VALUES,
+  type FederationResource,
+  FederationScopeError,
+  parseFederationScope,
+} from '../scope-schema.js';
+import type { FederationContext } from './federation-context.js';
+
+const federationResourceSet: ReadonlySet<string> = new Set<string>(FEDERATION_RESOURCE_VALUES);
+
+export type FederationScopeDenyStage =
+  | 'scope_parse'
+  | 'resource_allowlist'
+  | 'resource_exclusion'
+  | 'native_rbac'
+  | 'row_cap';
+
+export type FederationScopeDenyCode =
+  | 'invalid_scope'
+  | 'invalid_resource'
+  | 'resource_not_granted'
+  | 'resource_excluded'
+  | 'native_rbac_denied'
+  | 'invalid_limit';
+
+export type FederationScopeDenyStatus = 400 | 403;
+
+export interface FederationScopeDenyDetails {
+  readonly [key: string]: string | number | boolean | readonly string[];
+}
+
+export interface FederationScopeDenyReason {
+  readonly code: FederationScopeDenyCode;
+  readonly stage: FederationScopeDenyStage;
+  readonly statusCode: FederationScopeDenyStatus;
+  readonly message: string;
+  readonly grantId: string;
+  readonly peerId: string;
+  readonly subjectUserId: string;
+  readonly resource: string;
+  readonly details?: FederationScopeDenyDetails;
+}
+
+export interface FederationNativeRbacRequest {
+  readonly grantId: string;
+  readonly peerId: string;
+  readonly subjectUserId: string;
+  readonly resource: FederationResource;
+}
+
+export interface FederationNativeRbacAccess {
+  /** Whether this user may read personal rows for this resource. */
+  readonly includePersonal: boolean;
+
+  /** Team IDs this user may read for this resource under native RBAC. */
+  readonly teamIds: readonly string[];
+}
+
+export interface FederationNativeRbacAllowedResult {
+  readonly allowed: true;
+  readonly access: FederationNativeRbacAccess;
+}
+
+export interface FederationNativeRbacDeniedResult {
+  readonly allowed: false;
+  readonly reason?: string;
+  readonly details?: FederationScopeDenyDetails;
+}
+
+export type FederationNativeRbacResult =
+  | FederationNativeRbacAllowedResult
+  | FederationNativeRbacDeniedResult;
+
+export interface FederationNativeRbacEvaluator {
+  evaluateReadAccess(request: FederationNativeRbacRequest): Promise<FederationNativeRbacResult>;
+}
+
+export interface FederationScopeEvaluationInput {
+  readonly context: FederationContext;
+  readonly resource: string;
+  readonly requestedLimit?: number;
+  readonly nativeRbac: FederationNativeRbacEvaluator;
+}
+
+export interface FederationScopeQueryFilter {
+  readonly resource: FederationResource;
+  readonly subjectUserId: string;
+  readonly includePersonal: boolean;
+  readonly teamIds: readonly string[];
+  readonly limit: number;
+  readonly maxRowsPerQuery: number;
+}
+
+export interface FederationScopeAllowedResult {
+  readonly allowed: true;
+  readonly filter: FederationScopeQueryFilter;
+}
+
+export interface FederationScopeDeniedResult {
+  readonly allowed: false;
+  readonly deny: FederationScopeDenyReason;
+}
+
+export type FederationScopeEvaluationResult =
+  | FederationScopeAllowedResult
+  | FederationScopeDeniedResult;
+
+function isFederationResource(resource: string): resource is FederationResource {
+  return federationResourceSet.has(resource);
+}
+
+function uniqueStrings(values: readonly string[]): readonly string[] {
+  return Array.from(new Set<string>(values));
+}
+
+function intersectTeamIds(
+  nativeTeamIds: readonly string[],
+  scopedTeamIds: readonly string[] | undefined,
+): readonly string[] {
+  const uniqueNativeTeamIds = uniqueStrings(nativeTeamIds);
+
+  if (scopedTeamIds === undefined) {
+    return uniqueNativeTeamIds;
+  }
+
+  const nativeSet = new Set<string>(uniqueNativeTeamIds);
+  return uniqueStrings(scopedTeamIds).filter((teamId: string): boolean => nativeSet.has(teamId));
+}
+
+function makeDenyReason(params: {
+  readonly code: FederationScopeDenyCode;
+  readonly stage: FederationScopeDenyStage;
+  readonly statusCode?: FederationScopeDenyStatus;
+  readonly message: string;
+  readonly context: FederationContext;
+  readonly resource: string;
+  readonly details?: FederationScopeDenyDetails;
+}): FederationScopeDeniedResult {
+  return {
+    allowed: false,
+    deny: {
+      code: params.code,
+      stage: params.stage,
+      statusCode: params.statusCode ?? 403,
+      message: params.message,
+      grantId: params.context.grantId,
+      peerId: params.context.peerId,
+      subjectUserId: params.context.subjectUserId,
+      resource: params.resource,
+      ...(params.details !== undefined ? { details: params.details } : {}),
+    },
+  };
+}
+
+@Injectable()
+export class FederationScopeService {
+  async evaluateAccess(
+    input: FederationScopeEvaluationInput,
+  ): Promise<FederationScopeEvaluationResult> {
+    const { context, resource, requestedLimit, nativeRbac } = input;
+
+    let scope: ReturnType<typeof parseFederationScope>;
+    try {
+      scope = parseFederationScope(context.scope);
+    } catch (error: unknown) {
+      const message =
+        error instanceof FederationScopeError
+          ? 'Federation grant scope is invalid'
+          : 'Federation grant scope could not be parsed';
+      const details = error instanceof Error ? { reason: error.message } : undefined;
+      return makeDenyReason({
+        code: 'invalid_scope',
+        stage: 'scope_parse',
+        statusCode: 400,
+        message,
+        context,
+        resource,
+        ...(details !== undefined ? { details } : {}),
+      });
+    }
+
+    if (!isFederationResource(resource)) {
+      return makeDenyReason({
+        code: 'invalid_resource',
+        stage: 'resource_allowlist',
+        message: 'Requested federation resource is not supported',
+        context,
+        resource,
+        details: { supportedResources: FEDERATION_RESOURCE_VALUES },
+      });
+    }
+
+    if (scope.excluded_resources.includes(resource)) {
+      return makeDenyReason({
+        code: 'resource_excluded',
+        stage: 'resource_exclusion',
+        message: 'Requested federation resource is explicitly excluded by grant scope',
+        context,
+        resource,
+      });
+    }
+
+    if (!scope.resources.includes(resource)) {
+      return makeDenyReason({
+        code: 'resource_not_granted',
+        stage: 'resource_allowlist',
+        message: 'Requested federation resource is not granted by scope',
+        context,
+        resource,
+        details: { grantedResources: scope.resources },
+      });
+    }
+
+    if (requestedLimit !== undefined && (!Number.isInteger(requestedLimit) || requestedLimit < 1)) {
+      return makeDenyReason({
+        code: 'invalid_limit',
+        stage: 'row_cap',
+        statusCode: 400,
+        message: 'Requested row limit must be a positive integer',
+        context,
+        resource,
+        details: { requestedLimit },
+      });
+    }
+
+    const nativeResult = await nativeRbac.evaluateReadAccess({
+      grantId: context.grantId,
+      peerId: context.peerId,
+      subjectUserId: context.subjectUserId,
+      resource,
+    });
+
+    if (!nativeResult.allowed) {
+      return makeDenyReason({
+        code: 'native_rbac_denied',
+        stage: 'native_rbac',
+        message: nativeResult.reason ?? 'Subject user is not allowed to read this resource',
+        context,
+        resource,
+        ...(nativeResult.details !== undefined ? { details: nativeResult.details } : {}),
+      });
+    }
+
+    const scopeFilter = scope.filters?.[resource];
+    const includePersonal =
+      Boolean(scopeFilter?.include_personal ?? true) && nativeResult.access.includePersonal;
+    const teamIds = intersectTeamIds(nativeResult.access.teamIds, scopeFilter?.include_teams);
+    const limit = Math.min(requestedLimit ?? scope.max_rows_per_query, scope.max_rows_per_query);
+
+    return {
+      allowed: true,
+      filter: {
+        resource,
+        subjectUserId: context.subjectUserId,
+        includePersonal,
+        teamIds,
+        limit,
+        maxRowsPerQuery: scope.max_rows_per_query,
+      },
+    };
+  }
+}

apps/gateway/src/federation/server/verbs/__tests__/capabilities.controller.spec.ts

@@ -0,0 +1,88 @@
+import 'reflect-metadata';
+import { RequestMethod } from '@nestjs/common';
+import { describe, expect, it } from 'vitest';
+import type { FastifyRequest } from 'fastify';
+import { FederationCapabilitiesResponseSchema, FEDERATION_VERBS } from '@mosaicstack/types';
+import { FederationScopeError } from '../../../scope-schema.js';
+import { FederationAuthGuard } from '../../federation-auth.guard.js';
+import { CapabilitiesController } from '../capabilities.controller.js';
+
+const VALID_SCOPE = {
+  resources: ['tasks', 'notes'],
+  excluded_resources: ['credentials'],
+  max_rows_per_query: 250,
+} as const;
+
+const DEFAULTED_SCOPE = {
+  resources: ['memory'],
+  max_rows_per_query: 10,
+} as const;
+
+function makeRequest(scope: Record<string, unknown>): FastifyRequest {
+  return {
+    federationContext: {
+      grantId: 'grant-1',
+      peerId: 'peer-1',
+      subjectUserId: 'user-1',
+      scope,
+    },
+  } as FastifyRequest;
+}
+
+describe('CapabilitiesController', () => {
+  it('declares GET /api/federation/v1/capabilities', () => {
+    expect(Reflect.getMetadata('path', CapabilitiesController)).toBe(
+      'api/federation/v1/capabilities',
+    );
+    expect(Reflect.getMetadata('path', CapabilitiesController.prototype.getCapabilities)).toBe('/');
+    expect(Reflect.getMetadata('method', CapabilitiesController.prototype.getCapabilities)).toBe(
+      RequestMethod.GET,
+    );
+  });
+
+  it('is protected only by FederationAuthGuard', () => {
+    const guards = Reflect.getMetadata('__guards__', CapabilitiesController) as unknown[];
+
+    expect(guards).toEqual([FederationAuthGuard]);
+  });
+
+  it('returns resources, excluded resources, max rows, and M3 supported verbs from the active grant scope', () => {
+    const controller = new CapabilitiesController();
+
+    const response = controller.getCapabilities(makeRequest(VALID_SCOPE));
+
+    expect(response).toEqual({
+      resources: ['tasks', 'notes'],
+      excluded_resources: ['credentials'],
+      max_rows_per_query: 250,
+      supported_verbs: [...FEDERATION_VERBS],
+    });
+    expect(FederationCapabilitiesResponseSchema.safeParse(response).success).toBe(true);
+  });
+
+  it('applies scope defaults without RBAC or resource filtering', () => {
+    const controller = new CapabilitiesController();
+
+    const response = controller.getCapabilities(makeRequest(DEFAULTED_SCOPE));
+
+    expect(response).toEqual({
+      resources: ['memory'],
+      excluded_resources: [],
+      max_rows_per_query: 10,
+      supported_verbs: ['list', 'get', 'capabilities'],
+    });
+  });
+
+  it('rejects invalid scope state instead of returning an invalid capabilities contract', () => {
+    const controller = new CapabilitiesController();
+
+    expect(() =>
+      controller.getCapabilities(
+        makeRequest({
+          resources: [],
+          max_rows_per_query: 0,
+        }),
+      ),
+    ).toThrow(FederationScopeError);
+  });
+});

apps/gateway/src/federation/server/verbs/__tests__/list-query.service.spec.ts

@@ -0,0 +1,428 @@
+import { afterAll, beforeAll, describe, expect, it, vi } from 'vitest';
+import {
+  createPgliteDb,
+  insights,
+  missionTasks,
+  missions,
+  preferences,
+  projects,
+  runPgliteMigrations,
+  teams,
+  users,
+  type Db,
+  type DbHandle,
+} from '@mosaicstack/db';
+import type { FederationScopeQueryFilter } from '../../scope.service.js';
+import { FederationListQueryService } from '../list-query.service.js';
+
+const TASK_FILTER: FederationScopeQueryFilter = {
+  resource: 'tasks',
+  subjectUserId: 'user-1',
+  includePersonal: true,
+  teamIds: [],
+  limit: 2,
+  maxRowsPerQuery: 2,
+};
+
+const SUBJECT_USER_ID = 'fed-m3-05-subject';
+const OTHER_USER_ID = 'fed-m3-05-other';
+const TEAM_ID = '05000000-0000-4000-8000-000000000001';
+const UNAUTHORIZED_TEAM_ID = '05000000-0000-4000-8000-000000000002';
+const PERSONAL_PROJECT_ID = '05000000-0000-4000-8000-000000000101';
+const TEAM_PROJECT_ID = '05000000-0000-4000-8000-000000000102';
+const UNAUTHORIZED_PROJECT_ID = '05000000-0000-4000-8000-000000000103';
+const PERSONAL_MISSION_ID = '05000000-0000-4000-8000-000000000201';
+const TEAM_MISSION_ID = '05000000-0000-4000-8000-000000000202';
+const UNAUTHORIZED_MISSION_ID = '05000000-0000-4000-8000-000000000203';
+const SUBJECT_TEAM_NOTE_ID = '05000000-0000-4000-8000-000000000301';
+const OTHER_TEAM_NOTE_ID = '05000000-0000-4000-8000-000000000302';
+const SUBJECT_PERSONAL_NOTE_ID = '05000000-0000-4000-8000-000000000303';
+const SUBJECT_UNAUTHORIZED_NOTE_ID = '05000000-0000-4000-8000-000000000304';
+const INSIGHT_ONE_ID = '05000000-0000-4000-8000-000000000401';
+const INSIGHT_TWO_ID = '05000000-0000-4000-8000-000000000402';
+const PREFERENCE_ONE_ID = '05000000-0000-4000-8000-000000000501';
+const PREFERENCE_TWO_ID = '05000000-0000-4000-8000-000000000502';
+
+let dbHandle: DbHandle | undefined;
+
+function makeService() {
+  return new FederationListQueryService({} as Db);
+}
+
+function makeDbService() {
+  if (!dbHandle) {
+    throw new Error('test DB not initialized');
+  }
+  return new FederationListQueryService(dbHandle.db);
+}
+
+async function seedNotesFixture() {
+  if (!dbHandle) {
+    throw new Error('test DB not initialized');
+  }
+
+  await dbHandle.db.insert(users).values([
+    {
+      id: SUBJECT_USER_ID,
+      name: 'Federation Subject',
+      email: `${SUBJECT_USER_ID}@example.test`,
+      emailVerified: false,
+    },
+    {
+      id: OTHER_USER_ID,
+      name: 'Federation Other',
+      email: `${OTHER_USER_ID}@example.test`,
+      emailVerified: false,
+    },
+  ]);
+
+  await dbHandle.db.insert(teams).values([
+    {
+      id: TEAM_ID,
+      name: 'FED-M3-05 Team',
+      slug: 'fed-m3-05-team',
+      ownerId: SUBJECT_USER_ID,
+      managerId: SUBJECT_USER_ID,
+    },
+    {
+      id: UNAUTHORIZED_TEAM_ID,
+      name: 'FED-M3-05 Unauthorized Team',
+      slug: 'fed-m3-05-unauthorized-team',
+      ownerId: OTHER_USER_ID,
+      managerId: OTHER_USER_ID,
+    },
+  ]);
+
+  await dbHandle.db.insert(projects).values([
+    {
+      id: PERSONAL_PROJECT_ID,
+      name: 'FED-M3-05 Personal Project',
+      ownerId: SUBJECT_USER_ID,
+      ownerType: 'user',
+    },
+    {
+      id: TEAM_PROJECT_ID,
+      name: 'FED-M3-05 Team Project',
+      teamId: TEAM_ID,
+      ownerType: 'team',
+    },
+    {
+      id: UNAUTHORIZED_PROJECT_ID,
+      name: 'FED-M3-05 Unauthorized Project',
+      teamId: UNAUTHORIZED_TEAM_ID,
+      ownerType: 'team',
+    },
+  ]);
+
+  await dbHandle.db.insert(missions).values([
+    {
+      id: PERSONAL_MISSION_ID,
+      name: 'FED-M3-05 Personal Mission',
+      projectId: PERSONAL_PROJECT_ID,
+      userId: SUBJECT_USER_ID,
+    },
+    {
+      id: TEAM_MISSION_ID,
+      name: 'FED-M3-05 Team Mission',
+      projectId: TEAM_PROJECT_ID,
+      userId: SUBJECT_USER_ID,
+    },
+    {
+      id: UNAUTHORIZED_MISSION_ID,
+      name: 'FED-M3-05 Unauthorized Mission',
+      projectId: UNAUTHORIZED_PROJECT_ID,
+      userId: SUBJECT_USER_ID,
+    },
+  ]);
+
+  await dbHandle.db.insert(missionTasks).values([
+    {
+      id: SUBJECT_TEAM_NOTE_ID,
+      missionId: TEAM_MISSION_ID,
+      userId: SUBJECT_USER_ID,
+      notes: 'subject note on team mission',
+      createdAt: new Date('2026-06-24T03:00:00.000Z'),
+      updatedAt: new Date('2026-06-24T03:00:00.000Z'),
+    },
+    {
+      id: OTHER_TEAM_NOTE_ID,
+      missionId: TEAM_MISSION_ID,
+      userId: OTHER_USER_ID,
+      notes: 'other user note on team mission',
+      createdAt: new Date('2026-06-24T02:00:00.000Z'),
+      updatedAt: new Date('2026-06-24T02:00:00.000Z'),
+    },
+    {
+      id: SUBJECT_PERSONAL_NOTE_ID,
+      missionId: PERSONAL_MISSION_ID,
+      userId: SUBJECT_USER_ID,
+      notes: 'subject note on personal mission',
+      createdAt: new Date('2026-06-24T01:00:00.000Z'),
+      updatedAt: new Date('2026-06-24T01:00:00.000Z'),
+    },
+    {
+      id: SUBJECT_UNAUTHORIZED_NOTE_ID,
+      missionId: UNAUTHORIZED_MISSION_ID,
+      userId: SUBJECT_USER_ID,
+      notes: 'subject note outside grant-visible missions',
+      createdAt: new Date('2026-06-24T04:00:00.000Z'),
+      updatedAt: new Date('2026-06-24T04:00:00.000Z'),
+    },
+  ]);
+
+  const memoryCreatedAt = new Date('2026-06-24T05:00:00.000Z');
+  await dbHandle.db.insert(insights).values([
+    {
+      id: INSIGHT_ONE_ID,
+      userId: SUBJECT_USER_ID,
+      content: 'first insight',
+      source: 'agent',
+      createdAt: memoryCreatedAt,
+      updatedAt: memoryCreatedAt,
+    },
+    {
+      id: INSIGHT_TWO_ID,
+      userId: SUBJECT_USER_ID,
+      content: 'second insight',
+      source: 'agent',
+      createdAt: memoryCreatedAt,
+      updatedAt: memoryCreatedAt,
+    },
+  ]);
+
+  await dbHandle.db.insert(preferences).values([
+    {
+      id: PREFERENCE_ONE_ID,
+      userId: SUBJECT_USER_ID,
+      key: 'fed-m3-05-pref-1',
+      value: { enabled: true },
+      createdAt: memoryCreatedAt,
+      updatedAt: memoryCreatedAt,
+    },
+    {
+      id: PREFERENCE_TWO_ID,
+      userId: SUBJECT_USER_ID,
+      key: 'fed-m3-05-pref-2',
+      value: { enabled: false },
+      createdAt: memoryCreatedAt,
+      updatedAt: memoryCreatedAt,
+    },
+  ]);
+}
+
+function stubRows(
+  service: FederationListQueryService,
+  ...pages: Array<Array<Record<string, unknown>>>
+) {
+  const mock = vi.fn();
+  for (const page of pages) {
+    mock.mockResolvedValueOnce(page);
+  }
+  (
+    service as unknown as {
+      listAllRows: (
+        _filter: FederationScopeQueryFilter,
+        _rowLimit: number,
+        _cursor: unknown,
+      ) => Promise<Array<Record<string, unknown>>>;
+    }
+  ).listAllRows = mock;
+  return mock;
+}
+
+describe('FederationListQueryService', () => {
+  beforeAll(async () => {
+    dbHandle = createPgliteDb(`memory://fed-m3-05-list-${Date.now()}`);
+    await runPgliteMigrations(dbHandle);
+    await seedNotesFixture();
+  });
+
+  afterAll(async () => {
+    await dbHandle?.close();
+    dbHandle = undefined;
+  });
+
+  it('denies sensitive resources in native RBAC for M3 list reads', async () => {
+    const service = makeService();
+
+    await expect(
+      service.evaluateReadAccess({
+        grantId: 'grant-1',
+        peerId: 'peer-1',
+        subjectUserId: 'user-1',
+        resource: 'credentials',
+      }),
+    ).resolves.toMatchObject({
+      allowed: false,
+      reason: 'credentials federation list access is not implemented in M3',
+    });
+  });
+
+  it('allows personal memory reads without requiring team lookup', async () => {
+    const service = makeService();
+
+    await expect(
+      service.evaluateReadAccess({
+        grantId: 'grant-1',
+        peerId: 'peer-1',
+        subjectUserId: 'user-1',
+        resource: 'memory',
+      }),
+    ).resolves.toEqual({
+      allowed: true,
+      access: { includePersonal: true, teamIds: [] },
+    });
+  });
+
+  it('applies the scope row cap and returns an opaque next cursor when truncated', async () => {
+    const service = makeService();
+    const listAllRows = stubRows(
+      service,
+      [
+        { id: '3', createdAt: new Date('2026-06-24T03:00:00.000Z') },
+        { id: '2', createdAt: new Date('2026-06-24T02:00:00.000Z') },
+        { id: '1', createdAt: new Date('2026-06-24T01:00:00.000Z') },
+      ],
+      [{ id: '1', createdAt: new Date('2026-06-24T01:00:00.000Z') }],
+    );
+
+    const firstPage = await service.list({ filter: TASK_FILTER });
+
+    expect(firstPage).toEqual({
+      items: [
+        { id: '3', createdAt: new Date('2026-06-24T03:00:00.000Z') },
+        { id: '2', createdAt: new Date('2026-06-24T02:00:00.000Z') },
+      ],
+      truncated: true,
+      nextCursor: expect.any(String),
+    });
+
+    expect(listAllRows).toHaveBeenNthCalledWith(1, TASK_FILTER, 3, undefined);
+
+    const secondPage = await service.list({ filter: TASK_FILTER, cursor: firstPage.nextCursor });
+    expect(secondPage).toEqual({
+      items: [{ id: '1', createdAt: new Date('2026-06-24T01:00:00.000Z') }],
+      truncated: false,
+    });
+    expect(listAllRows).toHaveBeenNthCalledWith(
+      2,
+      TASK_FILTER,
+      3,
+      expect.objectContaining({ id: '2' }),
+    );
+  });
+
+  it('rejects invalid cursors instead of falling back to the first page', async () => {
+    const service = makeService();
+    stubRows(service, [{ id: '1' }]);
+
+    await expect(service.list({ filter: TASK_FILTER, cursor: 'not-base64-json' })).rejects.toThrow(
+      'Invalid federation list cursor',
+    );
+  });
+
+  it('throws when a truncated page cannot encode a resumable cursor', async () => {
+    const service = makeService();
+    stubRows(service, [
+      { id: '2', createdAt: 'not-a-date' },
+      { id: '1', createdAt: 'not-a-date' },
+    ]);
+
+    await expect(service.list({ filter: { ...TASK_FILTER, limit: 1 } })).rejects.toThrow(
+      'Federation list cursor cannot be encoded',
+    );
+  });
+
+  it('throws on unsupported resources instead of crashing pagination', async () => {
+    const service = makeService();
+
+    await expect(
+      service.list({
+        filter: {
+          ...TASK_FILTER,
+          resource: 'unknown-resource' as FederationScopeQueryFilter['resource'],
+        },
+      }),
+    ).rejects.toThrow('Unsupported federation list resource');
+  });
+
+  it('does not leak another user mission task notes through team-scoped note reads', async () => {
+    const service = makeDbService();
+
+    const result = await service.list({
+      filter: {
+        resource: 'notes',
+        subjectUserId: SUBJECT_USER_ID,
+        includePersonal: false,
+        teamIds: [TEAM_ID],
+        limit: 10,
+        maxRowsPerQuery: 10,
+      },
+    });
+
+    const ids = result.items.map((item) => item['id']);
+    expect(ids).toEqual([SUBJECT_TEAM_NOTE_ID]);
+    expect(ids).not.toContain(OTHER_TEAM_NOTE_ID);
+  });
+
+  it('does not return subject personal mission task notes when includePersonal is false', async () => {
+    const service = makeDbService();
+
+    const result = await service.list({
+      filter: {
+        resource: 'notes',
+        subjectUserId: SUBJECT_USER_ID,
+        includePersonal: false,
+        teamIds: [TEAM_ID],
+        limit: 10,
+        maxRowsPerQuery: 10,
+      },
+    });
+
+    expect(result.items.map((item) => item['id'])).not.toContain(SUBJECT_PERSONAL_NOTE_ID);
+  });
+
+  it('does not return subject notes from missions outside the grant-visible project set', async () => {
+    const service = makeDbService();
+
+    const result = await service.list({
+      filter: {
+        resource: 'notes',
+        subjectUserId: SUBJECT_USER_ID,
+        includePersonal: true,
+        teamIds: [TEAM_ID],
+        limit: 10,
+        maxRowsPerQuery: 10,
+      },
+    });
+
+    const ids = result.items.map((item) => item['id']);
+    expect(ids).toContain(SUBJECT_PERSONAL_NOTE_ID);
+    expect(ids).toContain(SUBJECT_TEAM_NOTE_ID);
+    expect(ids).not.toContain(SUBJECT_UNAUTHORIZED_NOTE_ID);
+    expect(ids).not.toContain(OTHER_TEAM_NOTE_ID);
+  });
+
+  it('paginates memory deterministically across insights and preferences', async () => {
+    const service = makeDbService();
+    const filter: FederationScopeQueryFilter = {
+      resource: 'memory',
+      subjectUserId: SUBJECT_USER_ID,
+      includePersonal: true,
+      teamIds: [],
+      limit: 2,
+      maxRowsPerQuery: 2,
+    };
+
+    const firstPage = await service.list({ filter });
+    const secondPage = await service.list({ filter, cursor: firstPage.nextCursor });
+    const firstPageIds = firstPage.items.map((item) => item['id']);
+    const secondPageIds = secondPage.items.map((item) => item['id']);
+    const allIds = [...firstPageIds, ...secondPageIds];
+
+    expect(firstPage).toMatchObject({ truncated: true, nextCursor: expect.any(String) });
+    expect(firstPageIds).toEqual([INSIGHT_TWO_ID, INSIGHT_ONE_ID]);
+    expect(secondPageIds).toEqual([PREFERENCE_TWO_ID, PREFERENCE_ONE_ID]);
+    expect(new Set(allIds).size).toBe(allIds.length);
+  });
+});

apps/gateway/src/federation/server/verbs/__tests__/list.controller.spec.ts

@@ -0,0 +1,188 @@
+import 'reflect-metadata';
+import { RequestMethod } from '@nestjs/common';
+import type { FastifyRequest } from 'fastify';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { FederationAuthGuard } from '../../federation-auth.guard.js';
+import type {
+  FederationScopeEvaluationResult,
+  FederationScopeQueryFilter,
+} from '../../scope.service.js';
+import { ListController } from '../list.controller.js';
+import type { FederationListQueryResult } from '../list-query.service.js';
+
+const FEDERATION_CONTEXT = {
+  grantId: 'grant-1',
+  peerId: 'peer-1',
+  subjectUserId: 'user-1',
+  scope: { resources: ['tasks'], max_rows_per_query: 25 },
+};
+
+const TASK_FILTER: FederationScopeQueryFilter = {
+  resource: 'tasks',
+  subjectUserId: 'user-1',
+  includePersonal: true,
+  teamIds: ['team-1'],
+  limit: 10,
+  maxRowsPerQuery: 25,
+};
+
+function makeRequest(): FastifyRequest {
+  return { federationContext: FEDERATION_CONTEXT } as unknown as FastifyRequest;
+}
+
+function allowedScope(
+  filter: FederationScopeQueryFilter = TASK_FILTER,
+): FederationScopeEvaluationResult {
+  return { allowed: true, filter };
+}
+
+function makeController(opts?: {
+  scopeResult?: FederationScopeEvaluationResult;
+  queryResult?: FederationListQueryResult;
+}) {
+  const scope = {
+    evaluateAccess: vi.fn().mockResolvedValue(opts?.scopeResult ?? allowedScope()),
+  };
+  const query = {
+    evaluateReadAccess: vi.fn(),
+    list: vi.fn().mockResolvedValue(
+      opts?.queryResult ?? {
+        items: [
+          {
+            id: 'task-1',
+            title: 'Federated task',
+            createdAt: new Date('2026-06-24T00:00:00.000Z'),
+          },
+        ],
+        truncated: false,
+      },
+    ),
+  };
+
+  return {
+    controller: new ListController(scope as never, query as never),
+    scope,
+    query,
+  };
+}
+
+describe('ListController', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('declares POST /api/federation/v1/list/:resource protected only by FederationAuthGuard', () => {
+    expect(Reflect.getMetadata('path', ListController)).toBe('api/federation/v1/list');
+    expect(Reflect.getMetadata('path', ListController.prototype.list)).toBe(':resource');
+    expect(Reflect.getMetadata('method', ListController.prototype.list)).toBe(RequestMethod.POST);
+    expect(Reflect.getMetadata('__guards__', ListController)).toEqual([FederationAuthGuard]);
+  });
+
+  it('runs AuthGuard context through ScopeService and returns local-source tagged rows', async () => {
+    const { controller, scope, query } = makeController();
+
+    const response = await controller.list('tasks', makeRequest(), { limit: 10 });
+
+    expect(scope.evaluateAccess).toHaveBeenCalledWith({
+      context: FEDERATION_CONTEXT,
+      resource: 'tasks',
+      requestedLimit: 10,
+      nativeRbac: query,
+    });
+    expect(query.list).toHaveBeenCalledWith({ filter: TASK_FILTER, cursor: undefined });
+    expect(response).toEqual({
+      items: [
+        {
+          id: 'task-1',
+          title: 'Federated task',
+          createdAt: new Date('2026-06-24T00:00:00.000Z'),
+          _source: 'local',
+        },
+      ],
+    });
+  });
+
+  it('preserves pagination metadata when row cap truncates the query layer result', async () => {
+    const { controller } = makeController({
+      queryResult: {
+        items: [{ id: 'task-1' }],
+        nextCursor: 'cursor-2',
+        truncated: true,
+      },
+    });
+
+    const response = await controller.list('tasks', makeRequest(), { cursor: 'cursor-1' });
+
+    expect(response).toEqual({
+      items: [{ id: 'task-1', _source: 'local' }],
+      nextCursor: 'cursor-2',
+      _truncated: true,
+    });
+  });
+
+  it('returns a federation error envelope when auth guard context is missing', async () => {
+    const { controller, scope, query } = makeController();
+
+    await expect(
+      controller.list('tasks', {} as unknown as FastifyRequest, {}),
+    ).rejects.toMatchObject({
+      response: {
+        error: {
+          code: 'unauthorized',
+          message: 'Federation context missing',
+        },
+      },
+      status: 401,
+    });
+    expect(scope.evaluateAccess).not.toHaveBeenCalled();
+    expect(query.list).not.toHaveBeenCalled();
+  });
+
+  it('returns a federation error envelope when scope evaluation denies access', async () => {
+    const { controller, query } = makeController({
+      scopeResult: {
+        allowed: false,
+        deny: {
+          code: 'resource_excluded',
+          stage: 'resource_exclusion',
+          statusCode: 403,
+          message: 'Requested federation resource is explicitly excluded by grant scope',
+          grantId: 'grant-1',
+          peerId: 'peer-1',
+          subjectUserId: 'user-1',
+          resource: 'credentials',
+        },
+      },
+    });
+
+    await expect(controller.list('credentials', makeRequest(), {})).rejects.toMatchObject({
+      response: {
+        error: {
+          code: 'scope_violation',
+          message: 'Requested federation resource is explicitly excluded by grant scope',
+        },
+      },
+      status: 403,
+    });
+    expect(query.list).not.toHaveBeenCalled();
+  });
+
+  it('rejects malformed request body fields before querying storage', async () => {
+    const { controller, scope, query } = makeController();
+
+    await expect(controller.list('tasks', makeRequest(), { cursor: 123 })).rejects.toMatchObject({
+      response: { error: { code: 'invalid_request' } },
+      status: 400,
+    });
+    await expect(controller.list('tasks', makeRequest(), { limit: false })).rejects.toMatchObject({
+      response: { error: { code: 'invalid_request' } },
+      status: 400,
+    });
+    await expect(controller.list('tasks', makeRequest(), { limit: 'abc' })).rejects.toMatchObject({
+      response: { error: { code: 'invalid_request' } },
+      status: 400,
+    });
+    expect(scope.evaluateAccess).not.toHaveBeenCalled();
+    expect(query.list).not.toHaveBeenCalled();
+  });
+});

apps/gateway/src/federation/server/verbs/capabilities.controller.ts

@@ -0,0 +1,38 @@
+/**
+ * Federation capabilities verb (FED-M3-07).
+ *
+ * Returns the read-only capability envelope for the active grant attached by
+ * FederationAuthGuard. This endpoint intentionally does not invoke native RBAC
+ * or ScopeService: an active grant is enough to ask what the grant allows.
+ */
+
+import { Controller, Get, Req, UseGuards } from '@nestjs/common';
+import type { FastifyRequest } from 'fastify';
+import {
+  FEDERATION_VERBS,
+  type FederationCapabilitiesResponse,
+  type FederationVerb,
+} from '@mosaicstack/types';
+import { parseFederationScope } from '../../scope-schema.js';
+import { FederationAuthGuard } from '../federation-auth.guard.js';
+import '../federation-context.js';
+
+@Controller('api/federation/v1/capabilities')
+@UseGuards(FederationAuthGuard)
+export class CapabilitiesController {
+  @Get()
+  getCapabilities(@Req() request: FastifyRequest): FederationCapabilitiesResponse {
+    if (!request.federationContext) {
+      throw new Error('Federation context missing after auth guard');
+    }
+
+    const scope = parseFederationScope(request.federationContext.scope);
+
+    return {
+      resources: [...scope.resources],
+      excluded_resources: [...scope.excluded_resources],
+      max_rows_per_query: scope.max_rows_per_query,
+      supported_verbs: [...FEDERATION_VERBS] satisfies FederationVerb[],
+    };
+  }
+}

apps/gateway/src/federation/server/verbs/list-query.service.ts

@@ -0,0 +1,408 @@
+/**
+ * Federation list query layer (FED-M3-05).
+ *
+ * Read-only DB adapter used by ListController after FederationAuthGuard and
+ * FederationScopeService have established the subject user, allowed resource,
+ * native-RBAC intersection, and row cap. Audit writes are intentionally
+ * deferred to M4.
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import {
+  and,
+  desc,
+  eq,
+  inArray,
+  insights,
+  isNotNull,
+  lt,
+  missionTasks,
+  missions,
+  or,
+  preferences,
+  projects,
+  tasks,
+  teamMembers,
+  type Db,
+} from '@mosaicstack/db';
+import type {
+  FederationNativeRbacEvaluator,
+  FederationNativeRbacRequest,
+  FederationNativeRbacResult,
+  FederationScopeQueryFilter,
+} from '../scope.service.js';
+import { DB } from '../../../database/database.module.js';
+
+export interface FederationListQueryRequest {
+  readonly filter: FederationScopeQueryFilter;
+  readonly cursor?: string;
+}
+
+export interface FederationListQueryResult<T extends object = Record<string, unknown>> {
+  readonly items: T[];
+  readonly nextCursor?: string;
+  readonly truncated: boolean;
+}
+
+type CursorSource = 'insights' | 'preferences';
+const CURSOR_SOURCE = Symbol('federationCursorSource');
+
+type RowObject = Record<string, unknown> & { readonly [CURSOR_SOURCE]?: CursorSource };
+
+interface KeysetCursor {
+  readonly createdAt: Date;
+  readonly id: string;
+  readonly source?: CursorSource;
+}
+
+function encodeCursor(row: RowObject): string {
+  const createdAt = row['createdAt'];
+  const id = row['id'];
+  if (!(createdAt instanceof Date) || typeof id !== 'string') {
+    throw new Error('Federation list cursor cannot be encoded');
+  }
+
+  const source = row[CURSOR_SOURCE];
+  return Buffer.from(
+    JSON.stringify({ createdAt: createdAt.toISOString(), id, ...(source ? { source } : {}) }),
+    'utf8',
+  ).toString('base64url');
+}
+
+function decodeCursor(cursor: string | undefined): KeysetCursor | undefined {
+  if (cursor === undefined) {
+    return undefined;
+  }
+
+  try {
+    const parsed = JSON.parse(Buffer.from(cursor, 'base64url').toString('utf8')) as unknown;
+    if (typeof parsed !== 'object' || parsed === null) {
+      throw new Error('cursor must be an object');
+    }
+
+    const { createdAt, id, source } = parsed as {
+      createdAt?: unknown;
+      id?: unknown;
+      source?: unknown;
+    };
+    if (typeof createdAt !== 'string' || typeof id !== 'string' || id.length === 0) {
+      throw new Error('cursor is missing createdAt or id');
+    }
+    if (source !== undefined && source !== 'insights' && source !== 'preferences') {
+      throw new Error('cursor source is invalid');
+    }
+
+    const date = new Date(createdAt);
+    if (Number.isNaN(date.getTime())) {
+      throw new Error('cursor createdAt is invalid');
+    }
+
+    return { createdAt: date, id, ...(source ? { source } : {}) };
+  } catch {
+    throw new Error('Invalid federation list cursor');
+  }
+}
+
+function paginate<T extends RowObject>(rows: T[], limit: number): FederationListQueryResult<T> {
+  const page = rows.slice(0, limit);
+  const hasMore = rows.length > limit;
+  const nextCursor = hasMore ? encodeCursor(page[page.length - 1] ?? {}) : undefined;
+
+  return {
+    items: page,
+    truncated: hasMore,
+    ...(nextCursor !== undefined ? { nextCursor } : {}),
+  };
+}
+
+function markCursorSource<T extends RowObject>(row: T, source: CursorSource): T {
+  Object.defineProperty(row, CURSOR_SOURCE, {
+    value: source,
+    enumerable: false,
+    configurable: false,
+  });
+  return row;
+}
+
+function sortRows(rows: RowObject[]): RowObject[] {
+  return [...rows].sort((a, b) => {
+    const aTime = a['createdAt'] instanceof Date ? a['createdAt'].getTime() : 0;
+    const bTime = b['createdAt'] instanceof Date ? b['createdAt'].getTime() : 0;
+    if (aTime !== bTime) {
+      return bTime - aTime;
+    }
+    return String(b['id'] ?? '').localeCompare(String(a['id'] ?? ''));
+  });
+}
+
+@Injectable()
+export class FederationListQueryService implements FederationNativeRbacEvaluator {
+  constructor(@Inject(DB) private readonly db: Db) {}
+
+  async evaluateReadAccess(
+    request: FederationNativeRbacRequest,
+  ): Promise<FederationNativeRbacResult> {
+    if (request.resource === 'credentials' || request.resource === 'api_keys') {
+      return {
+        allowed: false,
+        reason: `${request.resource} federation list access is not implemented in M3`,
+        details: { resource: request.resource },
+      };
+    }
+
+    if (request.resource === 'memory') {
+      return { allowed: true, access: { includePersonal: true, teamIds: [] } };
+    }
+
+    const teamIds = await this.listSubjectTeamIds(request.subjectUserId);
+    return { allowed: true, access: { includePersonal: true, teamIds } };
+  }
+
+  async list<T extends RowObject = RowObject>(
+    request: FederationListQueryRequest,
+  ): Promise<FederationListQueryResult<T>> {
+    const cursor = decodeCursor(request.cursor);
+    const rows = await this.listAllRows(request.filter, request.filter.limit + 1, cursor);
+    return paginate(rows as T[], request.filter.limit);
+  }
+
+  private async listAllRows(
+    filter: FederationScopeQueryFilter,
+    rowLimit: number,
+    cursor: KeysetCursor | undefined,
+  ): Promise<RowObject[]> {
+    switch (filter.resource) {
+      case 'tasks':
+        return this.listTasks(filter, rowLimit, cursor);
+      case 'notes':
+        return this.listNotes(filter, rowLimit, cursor);
+      case 'memory':
+        return this.listMemory(filter, rowLimit, cursor);
+      case 'credentials':
+      case 'api_keys':
+        return [];
+      default:
+        throw new Error(`Unsupported federation list resource: ${String(filter.resource)}`);
+    }
+  }
+
+  private async listSubjectTeamIds(subjectUserId: string): Promise<string[]> {
+    const rows = await this.db
+      .select({ teamId: teamMembers.teamId })
+      .from(teamMembers)
+      .where(eq(teamMembers.userId, subjectUserId));
+
+    return rows.map((row) => row.teamId);
+  }
+
+  private async listAccessibleProjectIds(filter: FederationScopeQueryFilter): Promise<string[]> {
+    const clauses = [];
+    if (filter.includePersonal) {
+      clauses.push(and(eq(projects.ownerType, 'user'), eq(projects.ownerId, filter.subjectUserId)));
+    }
+    if (filter.teamIds.length > 0) {
+      clauses.push(
+        and(eq(projects.ownerType, 'team'), inArray(projects.teamId, [...filter.teamIds])),
+      );
+    }
+
+    if (clauses.length === 0) {
+      return [];
+    }
+
+    const rows = await this.db
+      .select({ id: projects.id })
+      .from(projects)
+      .where(clauses.length === 1 ? clauses[0] : or(...clauses));
+
+    return rows.map((row) => row.id);
+  }
+
+  private async listMissionIds(projectIds: readonly string[]): Promise<string[]> {
+    if (projectIds.length === 0) {
+      return [];
+    }
+
+    const rows = await this.db
+      .select({ id: missions.id })
+      .from(missions)
+      .where(inArray(missions.projectId, [...projectIds]));
+
+    return rows.map((row) => row.id);
+  }
+
+  private async listTasks(
+    filter: FederationScopeQueryFilter,
+    rowLimit: number,
+    cursor: KeysetCursor | undefined,
+  ): Promise<RowObject[]> {
+    const projectIds = await this.listAccessibleProjectIds(filter);
+    const missionIds = await this.listMissionIds(projectIds);
+    const clauses = [];
+
+    if (projectIds.length > 0) {
+      clauses.push(inArray(tasks.projectId, projectIds));
+    }
+    if (missionIds.length > 0) {
+      clauses.push(inArray(tasks.missionId, missionIds));
+    }
+
+    if (clauses.length === 0) {
+      return [];
+    }
+
+    const scopeClause = clauses.length === 1 ? clauses[0] : or(...clauses);
+    const cursorClause = cursor
+      ? or(
+          lt(tasks.createdAt, cursor.createdAt),
+          and(eq(tasks.createdAt, cursor.createdAt), lt(tasks.id, cursor.id)),
+        )
+      : undefined;
+
+    const rows = await this.db
+      .select({
+        id: tasks.id,
+        title: tasks.title,
+        description: tasks.description,
+        status: tasks.status,
+        priority: tasks.priority,
+        projectId: tasks.projectId,
+        missionId: tasks.missionId,
+        assignee: tasks.assignee,
+        tags: tasks.tags,
+        dueDate: tasks.dueDate,
+        metadata: tasks.metadata,
+        createdAt: tasks.createdAt,
+        updatedAt: tasks.updatedAt,
+      })
+      .from(tasks)
+      .where(and(scopeClause, cursorClause))
+      .orderBy(desc(tasks.createdAt), desc(tasks.id))
+      .limit(rowLimit);
+
+    return sortRows(rows as RowObject[]);
+  }
+
+  private async listNotes(
+    filter: FederationScopeQueryFilter,
+    rowLimit: number,
+    cursor: KeysetCursor | undefined,
+  ): Promise<RowObject[]> {
+    const projectIds = await this.listAccessibleProjectIds(filter);
+    const missionIds = await this.listMissionIds(projectIds);
+
+    if (missionIds.length === 0) {
+      return [];
+    }
+
+    // mission_tasks rows are user-scoped even when the mission belongs to a team.
+    // Team visibility can narrow the mission set, but it must never widen the
+    // query to other users' mission task notes.
+    const scopeClause = and(
+      eq(missionTasks.userId, filter.subjectUserId),
+      inArray(missionTasks.missionId, missionIds),
+    );
+    const cursorClause = cursor
+      ? or(
+          lt(missionTasks.createdAt, cursor.createdAt),
+          and(eq(missionTasks.createdAt, cursor.createdAt), lt(missionTasks.id, cursor.id)),
+        )
+      : undefined;
+
+    const rows = await this.db
+      .select({
+        id: missionTasks.id,
+        missionId: missionTasks.missionId,
+        taskId: missionTasks.taskId,
+        status: missionTasks.status,
+        content: missionTasks.notes,
+        createdAt: missionTasks.createdAt,
+        updatedAt: missionTasks.updatedAt,
+      })
+      .from(missionTasks)
+      .where(and(scopeClause, cursorClause, isNotNull(missionTasks.notes)))
+      .orderBy(desc(missionTasks.createdAt), desc(missionTasks.id))
+      .limit(rowLimit);
+
+    return sortRows(rows.filter((row) => row.content !== '') as RowObject[]);
+  }
+
+  private async listMemory(
+    filter: FederationScopeQueryFilter,
+    rowLimit: number,
+    cursor: KeysetCursor | undefined,
+  ): Promise<RowObject[]> {
+    if (!filter.includePersonal) {
+      return [];
+    }
+    if (cursor && cursor.source === undefined) {
+      throw new Error('Invalid federation list cursor');
+    }
+
+    const rows: RowObject[] = [];
+
+    // Memory spans two physical tables. To keep pagination deterministic and
+    // resumable without a SQL UNION, M3 emits a fixed block order: all insights
+    // first, then preferences. The opaque cursor records which table produced
+    // the boundary row, so the next page never re-applies one table's keyset to
+    // the other table (which could duplicate/skip rows at equal timestamps).
+    if (cursor?.source !== 'preferences') {
+      const insightCursorClause = cursor
+        ? or(
+            lt(insights.createdAt, cursor.createdAt),
+            and(eq(insights.createdAt, cursor.createdAt), lt(insights.id, cursor.id)),
+          )
+        : undefined;
+      const insightRows = await this.db
+        .select({
+          id: insights.id,
+          kind: insights.source,
+          content: insights.content,
+          category: insights.category,
+          relevanceScore: insights.relevanceScore,
+          metadata: insights.metadata,
+          createdAt: insights.createdAt,
+          updatedAt: insights.updatedAt,
+        })
+        .from(insights)
+        .where(and(eq(insights.userId, filter.subjectUserId), insightCursorClause))
+        .orderBy(desc(insights.createdAt), desc(insights.id))
+        .limit(rowLimit);
+
+      rows.push(...(insightRows as RowObject[]).map((row) => markCursorSource(row, 'insights')));
+    }
+
+    const remaining = rowLimit - rows.length;
+    if (remaining <= 0) {
+      return rows;
+    }
+
+    const preferenceCursorClause =
+      cursor?.source === 'preferences'
+        ? or(
+            lt(preferences.createdAt, cursor.createdAt),
+            and(eq(preferences.createdAt, cursor.createdAt), lt(preferences.id, cursor.id)),
+          )
+        : undefined;
+    const preferenceRows = await this.db
+      .select({
+        id: preferences.id,
+        kind: preferences.category,
+        key: preferences.key,
+        value: preferences.value,
+        source: preferences.source,
+        mutable: preferences.mutable,
+        createdAt: preferences.createdAt,
+        updatedAt: preferences.updatedAt,
+      })
+      .from(preferences)
+      .where(and(eq(preferences.userId, filter.subjectUserId), preferenceCursorClause))
+      .orderBy(desc(preferences.createdAt), desc(preferences.id))
+      .limit(remaining);
+
+    rows.push(
+      ...(preferenceRows as RowObject[]).map((row) => markCursorSource(row, 'preferences')),
+    );
+    return rows;
+  }
+}

apps/gateway/src/federation/server/verbs/list.controller.ts

@@ -0,0 +1,147 @@
+/**
+ * Federation list verb (FED-M3-05).
+ *
+ * POST /api/federation/v1/list/:resource
+ *
+ * Pipeline: FederationAuthGuard attaches the active grant context, then
+ * FederationScopeService enforces grant scope + native RBAC intersection, then
+ * the read-only query layer returns capped rows tagged with `_source`. Read
+ * audit-log writes are deferred to M4; this controller does not persist request
+ * or response bodies.
+ */
+
+import {
+  Body,
+  Controller,
+  HttpException,
+  Inject,
+  Param,
+  Post,
+  Req,
+  UseGuards,
+} from '@nestjs/common';
+import type { FastifyRequest } from 'fastify';
+import {
+  FederationInvalidRequestError,
+  FederationScopeViolationError,
+  FederationUnauthorizedError,
+  SOURCE_LOCAL,
+  tagWithSource,
+  type FederationListResponse,
+  type SourceTag,
+} from '@mosaicstack/types';
+import { FederationAuthGuard } from '../federation-auth.guard.js';
+import '../federation-context.js';
+import { FederationScopeService } from '../scope.service.js';
+import { FederationListQueryService } from './list-query.service.js';
+
+interface FederationListRequestBody {
+  readonly limit?: unknown;
+  readonly cursor?: unknown;
+}
+
+type FederatedRow = Record<string, unknown> & SourceTag;
+
+function parseLimit(body: FederationListRequestBody | undefined): number | undefined {
+  if (body?.limit === undefined) {
+    return undefined;
+  }
+
+  const parsed =
+    typeof body.limit === 'number'
+      ? body.limit
+      : typeof body.limit === 'string' && body.limit.trim().length > 0
+        ? Number(body.limit)
+        : Number.NaN;
+
+  if (!Number.isSafeInteger(parsed) || parsed < 1) {
+    throw new HttpException(
+      new FederationInvalidRequestError(
+        'Federation list limit must be a positive integer',
+      ).toEnvelope(),
+      400,
+    );
+  }
+
+  return parsed;
+}
+
+function parseCursor(body: FederationListRequestBody | undefined): string | undefined {
+  if (body?.cursor === undefined) {
+    return undefined;
+  }
+  if (typeof body.cursor === 'string') {
+    return body.cursor;
+  }
+  throw new HttpException(
+    new FederationInvalidRequestError('Federation list cursor must be a string').toEnvelope(),
+    400,
+  );
+}
+
+@Controller('api/federation/v1/list')
+@UseGuards(FederationAuthGuard)
+export class ListController {
+  constructor(
+    @Inject(FederationScopeService) private readonly scope: FederationScopeService,
+    @Inject(FederationListQueryService) private readonly query: FederationListQueryService,
+  ) {}
+
+  @Post(':resource')
+  async list(
+    @Param('resource') resource: string,
+    @Req() request: FastifyRequest,
+    @Body() body?: FederationListRequestBody,
+  ): Promise<FederationListResponse<FederatedRow>> {
+    if (!request.federationContext) {
+      throw new HttpException(
+        new FederationUnauthorizedError('Federation context missing').toEnvelope(),
+        401,
+      );
+    }
+
+    const requestedLimit = parseLimit(body);
+    const cursor = parseCursor(body);
+    const scopeResult = await this.scope.evaluateAccess({
+      context: request.federationContext,
+      resource,
+      requestedLimit,
+      nativeRbac: this.query,
+    });
+
+    if (!scopeResult.allowed) {
+      const ErrorClass =
+        scopeResult.deny.statusCode === 400
+          ? FederationInvalidRequestError
+          : FederationScopeViolationError;
+      throw new HttpException(
+        new ErrorClass(scopeResult.deny.message, scopeResult.deny).toEnvelope(),
+        scopeResult.deny.statusCode,
+      );
+    }
+
+    let result: Awaited<ReturnType<FederationListQueryService['list']>>;
+    try {
+      result = await this.query.list({ filter: scopeResult.filter, cursor });
+    } catch (error: unknown) {
+      if (error instanceof Error && error.message === 'Invalid federation list cursor') {
+        throw new HttpException(
+          new FederationInvalidRequestError('Federation list cursor is invalid').toEnvelope(),
+          400,
+        );
+      }
+      throw error;
+    }
+
+    const response: FederationListResponse<FederatedRow> = {
+      items: tagWithSource(result.items, SOURCE_LOCAL),
+    };
+    if (result.nextCursor !== undefined) {
+      response.nextCursor = result.nextCursor;
+    }
+    if (result.truncated) {
+      response._truncated = true;
+    }
+    return response;
+  }
+}

apps/gateway/src/main.ts

@@ -20,10 +20,12 @@ import { Logger, ValidationPipe } from '@nestjs/common';
 import { FastifyAdapter, type NestFastifyApplication } from '@nestjs/platform-fastify';
 import helmet from '@fastify/helmet';
 import { listSsoStartupWarnings } from '@mosaicstack/auth';
+import { loadConfig } from '@mosaicstack/config';
 import { AppModule } from './app.module.js';
 import { mountAuthHandler } from './auth/auth.controller.js';
 import { mountMcpHandler } from './mcp/mcp.controller.js';
 import { McpService } from './mcp/mcp.service.js';
+import { detectAndAssertTier, TierDetectionError } from '@mosaicstack/storage';
 
 async function bootstrap(): Promise<void> {
   const logger = new Logger('Bootstrap');
@@ -32,6 +34,20 @@ async function bootstrap(): Promise<void> {
     throw new Error('BETTER_AUTH_SECRET is required');
   }
 
+  // Pre-flight: assert all external services required by the configured tier
+  // are reachable. Runs before NestFactory.create() so failures are visible
+  // immediately with actionable remediation hints.
+  const mosaicConfig = loadConfig();
+  try {
+    await detectAndAssertTier(mosaicConfig);
+  } catch (err) {
+    if (err instanceof TierDetectionError) {
+      logger.error(`Tier detection failed: ${err.message}`);
+      logger.error(`Remediation: ${err.remediation}`);
+    }
+    throw err;
+  }
+
   for (const warning of listSsoStartupWarnings()) {
     logger.warn(warning);
   }

apps/gateway/src/mcp/mcp.controller.ts

@@ -3,7 +3,11 @@ import { Logger } from '@nestjs/common';
 import { fromNodeHeaders } from 'better-auth/node';
 import type { Auth } from '@mosaicstack/auth';
 import type { NestFastifyApplication } from '@nestjs/platform-fastify';
-import type { McpService } from './mcp.service.js';
+import {
+  createMcpActorContext,
+  deriveMcpToolScopesForUser,
+  type McpService,
+} from './mcp.service.js';
 import { AUTH } from '../auth/auth.tokens.js';
 
 /**
@@ -67,14 +71,25 @@ async function handleMcpRequest(
     return;
   }
 
-  const userId = result.user.id;
+  const authUser = result.user as {
+    id: string;
+    role?: string | null;
+    tenantId?: string | null;
+    organizationId?: string | null;
+  };
+  const actor = createMcpActorContext({
+    userId: authUser.id,
+    role: authUser.role,
+    tenantId: authUser.tenantId ?? authUser.organizationId ?? undefined,
+    scopes: deriveMcpToolScopesForUser({ role: authUser.role }),
+  });
 
   // ─── Session routing ─────────────────────────────────────────────────────
   const sessionId = req.raw.headers['mcp-session-id'];
 
   if (typeof sessionId === 'string' && sessionId.length > 0) {
     // Existing session request
-    const transport = mcpService.getSession(sessionId);
+    const transport = mcpService.getSession(sessionId, actor);
     if (!transport) {
       logger.warn(`MCP session not found: ${sessionId}`);
       reply.raw.writeHead(404, { 'Content-Type': 'application/json' });
@@ -112,8 +127,10 @@ async function handleMcpRequest(
   }
 
   // Create new session and handle this initializing request
-  const { transport } = mcpService.createSession(userId);
+  const { transport } = mcpService.createSession(actor);
-  logger.log(`New MCP session created for user ${userId}`);
+  logger.log(
+    `New MCP session created for actor=${actor.userId} tenant=${actor.tenantId} correlation=${actor.correlationId}`,
+  );
 
   await transport.handleRequest(req.raw, reply.raw, body);
 }

apps/gateway/src/mcp/mcp.service.spec.ts

@@ -0,0 +1,461 @@
+import { describe, expect, it, vi } from 'vitest';
+import type { z } from 'zod';
+import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
+import type { Brain } from '@mosaicstack/brain';
+import type { Memory } from '@mosaicstack/memory';
+import type { EmbeddingService } from '../memory/embedding.service.js';
+import type { CoordService } from '../coord/coord.service.js';
+import {
+  assertMcpToolAuthorized,
+  createMcpActorContext,
+  deriveMcpToolScopesForUser,
+  MCP_TOOL_SCOPES,
+  McpService,
+  type McpToolName,
+} from './mcp.service.js';
+
+type ToolResult = { content: Array<{ type: 'text'; text: string }> };
+type ToolHandler = (params: Record<string, unknown>) => Promise<ToolResult>;
+
+interface CapturedTool {
+  inputSchema: z.ZodType;
+  handler: ToolHandler;
+}
+
+function makeCapturingServer(): { server: McpServer; tools: Map<string, CapturedTool> } {
+  const tools = new Map<string, CapturedTool>();
+  const server = {
+    registerTool(name: string, config: { inputSchema: z.ZodType }, handler: ToolHandler): void {
+      tools.set(name, { inputSchema: config.inputSchema, handler });
+    },
+  };
+  return { server: server as unknown as McpServer, tools };
+}
+
+function makeService(opts?: {
+  projects?: Array<Record<string, unknown> & { id: string; ownerId?: string | null }>;
+  missions?: Array<
+    Record<string, unknown> & { id: string; projectId?: string | null; userId?: string | null }
+  >;
+  tasks?: Array<
+    Record<string, unknown> & {
+      id: string;
+      projectId?: string | null;
+      missionId?: string | null;
+      status?: string;
+    }
+  >;
+}) {
+  const projects = opts?.projects ?? [];
+  const missions = opts?.missions ?? [];
+  const tasks = opts?.tasks ?? [];
+  const brain = {
+    projects: {
+      findAll: vi.fn(async () => projects),
+      findById: vi.fn(async (id: string) => projects.find((project) => project.id === id) ?? null),
+    },
+    tasks: {
+      findAll: vi.fn(async () => tasks),
+      findById: vi.fn(async (id: string) => tasks.find((task) => task.id === id) ?? null),
+      findByProject: vi.fn(async (projectId: string) =>
+        tasks.filter((task) => task.projectId === projectId),
+      ),
+      findByMission: vi.fn(async (missionId: string) =>
+        tasks.filter((task) => task.missionId === missionId),
+      ),
+      findByStatus: vi.fn(async (status: string) => tasks.filter((task) => task.status === status)),
+      create: vi.fn(async (task: Record<string, unknown>) => ({ id: 'task-1', ...task })),
+      update: vi.fn(async (id: string, updates: Record<string, unknown>) => ({ id, ...updates })),
+    },
+    missions: {
+      findAll: vi.fn(async () => missions),
+      findById: vi.fn(async (id: string) => missions.find((mission) => mission.id === id) ?? null),
+      findByProject: vi.fn(async (projectId: string) =>
+        missions.filter((mission) => mission.projectId === projectId),
+      ),
+    },
+    conversations: {
+      findAll: vi.fn(async (userId: string) => [{ id: 'conversation-1', userId }]),
+    },
+  } as unknown as Brain;
+
+  const memory = {
+    insights: {
+      searchByEmbedding: vi.fn(async (userId: string) => [{ id: 'insight-1', userId }]),
+      create: vi.fn(async (insight: Record<string, unknown>) => ({ id: 'insight-2', ...insight })),
+    },
+    preferences: {
+      findByUser: vi.fn(async (userId: string) => [{ key: 'theme', userId }]),
+      findByUserAndCategory: vi.fn(async (userId: string, category: string) => [
+        { key: 'theme', userId, category },
+      ]),
+      upsert: vi.fn(async (preference: Record<string, unknown>) => ({
+        id: 'pref-1',
+        ...preference,
+      })),
+    },
+  } as unknown as Memory;
+
+  const embeddings = {
+    available: true,
+    embed: vi.fn(async () => [0.1, 0.2, 0.3]),
+  } as unknown as EmbeddingService;
+
+  const coord = {
+    getMissionStatus: vi.fn(async () => null),
+    listTasks: vi.fn(async () => []),
+    getTaskStatus: vi.fn(async () => null),
+  } as unknown as CoordService;
+
+  return {
+    service: new McpService(brain, memory, embeddings, coord),
+    brain: brain as unknown as {
+      conversations: { findAll: ReturnType<typeof vi.fn> };
+      tasks: {
+        create: ReturnType<typeof vi.fn>;
+        update: ReturnType<typeof vi.fn>;
+      };
+    },
+    memory: memory as unknown as {
+      insights: { searchByEmbedding: ReturnType<typeof vi.fn> };
+    },
+    coord: coord as unknown as {
+      listTasks: ReturnType<typeof vi.fn>;
+    },
+  };
+}
+
+function getTool(tools: Map<string, CapturedTool>, name: McpToolName): CapturedTool {
+  const tool = tools.get(name);
+  if (!tool) throw new Error(`Missing captured tool ${name}`);
+  return tool;
+}
+
+function makeMemberActor(userId = 'authenticated-user') {
+  return createMcpActorContext({
+    userId,
+    role: 'member',
+    scopes: deriveMcpToolScopesForUser({ role: 'member' }),
+  });
+}
+
+function makeAdminActor(userId = 'admin-user', tenantId?: string) {
+  return createMcpActorContext({
+    userId,
+    tenantId,
+    role: 'admin',
+    scopes: deriveMcpToolScopesForUser({ role: 'admin' }),
+  });
+}
+
+function makePlatformAdminActor(userId = 'platform-admin-user') {
+  return createMcpActorContext({
+    userId,
+    role: 'platform-admin',
+    scopes: deriveMcpToolScopesForUser({ role: 'platform-admin' }),
+  });
+}
+
+describe('MCP actor identity and tool scope enforcement', () => {
+  it('derives immutable actor, tenant, channel, correlation, and explicit tool scopes server-side', () => {
+    const actor = createMcpActorContext({
+      userId: ' user-authenticated ',
+      role: 'member',
+      scopes: deriveMcpToolScopesForUser({ role: 'member' }),
+    });
+
+    expect(actor.userId).toBe('user-authenticated');
+    expect(actor.tenantId).toBe('user:user-authenticated');
+    expect(actor.role).toBe('member');
+    expect(actor.channel).toBe('mcp');
+    expect(actor.correlationId).toMatch(/[0-9a-f-]{36}/i);
+    expect(actor.scopes.has(MCP_TOOL_SCOPES.memory_search)).toBe(true);
+    expect(actor.scopes.has(MCP_TOOL_SCOPES.coord_list_tasks)).toBe(false);
+    expect(
+      deriveMcpToolScopesForUser({ role: 'admin' }).has(MCP_TOOL_SCOPES.coord_list_tasks),
+    ).toBe(false);
+    expect(
+      deriveMcpToolScopesForUser({ role: 'platform-admin' }).has(MCP_TOOL_SCOPES.coord_list_tasks),
+    ).toBe(true);
+  });
+
+  it('fails closed when scopes are not supplied by the authenticated context policy', () => {
+    const actor = createMcpActorContext({ userId: 'user-authenticated' });
+
+    expect(actor.scopes.size).toBe(0);
+    expect(() => assertMcpToolAuthorized(actor, 'memory_search', { query: 'notes' })).toThrow(
+      'MCP tool scope denied: memory:insight:read',
+    );
+  });
+
+  it('fails closed when a tool caller supplies actor or tenant identity fields', () => {
+    const actor = createMcpActorContext({ userId: 'user-authenticated' });
+
+    expect(() =>
+      assertMcpToolAuthorized(actor, 'memory_search', {
+        userId: 'victim-user',
+        query: 'private data',
+      }),
+    ).toThrow('MCP caller-controlled identity field is forbidden: userId');
+
+    expect(() =>
+      assertMcpToolAuthorized(actor, 'coord_list_tasks', {
+        tenantId: 'victim-tenant',
+        projectPath: '/tmp/project',
+      }),
+    ).toThrow('MCP caller-controlled identity field is forbidden: tenantId');
+
+    expect(() =>
+      assertMcpToolAuthorized(actor, 'brain_create_task', {
+        title: 'forged org',
+        organizationId: 'victim-org',
+      }),
+    ).toThrow('MCP caller-controlled identity field is forbidden: organizationId');
+
+    expect(() =>
+      assertMcpToolAuthorized(actor, 'brain_update_task', {
+        title: 'forged team',
+        teamId: 'victim-team',
+      }),
+    ).toThrow('MCP caller-controlled identity field is forbidden: teamId');
+  });
+
+  it('fails closed when the server-derived actor lacks the required per-tool scope', () => {
+    const actor = createMcpActorContext({ userId: 'user-authenticated', scopes: [] });
+
+    expect(() => assertMcpToolAuthorized(actor, 'memory_search', { query: 'notes' })).toThrow(
+      'MCP tool scope denied: memory:insight:read',
+    );
+  });
+
+  it('removes caller-controlled userId from memory schemas and never queries victim memory', async () => {
+    const { service, memory } = makeService();
+    const { server, tools } = makeCapturingServer();
+    const actor = makeMemberActor('authenticated-user');
+
+    service.registerTools(server, actor);
+    const tool = getTool(tools, 'memory_search');
+
+    expect(tool.inputSchema.safeParse({ userId: 'victim-user', query: 'anything' }).success).toBe(
+      false,
+    );
+    await expect(tool.handler({ userId: 'victim-user', query: 'anything' })).rejects.toThrow(
+      'MCP caller-controlled identity field is forbidden: userId',
+    );
+    expect(memory.insights.searchByEmbedding).not.toHaveBeenCalled();
+
+    await tool.handler({ query: 'only my notes' });
+    expect(memory.insights.searchByEmbedding).toHaveBeenCalledWith(
+      'authenticated-user',
+      [0.1, 0.2, 0.3],
+      5,
+    );
+  });
+
+  it('binds conversation listing to the authenticated actor instead of a caller-supplied userId', async () => {
+    const { service, brain } = makeService();
+    const { server, tools } = makeCapturingServer();
+    const actor = makeMemberActor('authenticated-user');
+
+    service.registerTools(server, actor);
+    const tool = getTool(tools, 'brain_list_conversations');
+
+    expect(tool.inputSchema.safeParse({ userId: 'victim-user' }).success).toBe(false);
+    await expect(tool.handler({ userId: 'victim-user' })).rejects.toThrow(
+      'MCP caller-controlled identity field is forbidden: userId',
+    );
+    expect(brain.conversations.findAll).not.toHaveBeenCalled();
+
+    await tool.handler({});
+    expect(brain.conversations.findAll).toHaveBeenCalledWith('authenticated-user');
+  });
+
+  it('scopes brain project, mission, and task reads to the authenticated actor', async () => {
+    const { service } = makeService({
+      projects: [
+        { id: 'project-owned', ownerId: 'authenticated-user', name: 'owned' },
+        { id: 'project-victim', ownerId: 'victim-user', name: 'victim' },
+      ],
+      missions: [
+        { id: 'mission-owned', projectId: 'project-owned' },
+        { id: 'mission-victim', userId: 'victim-user', projectId: 'project-victim' },
+      ],
+      tasks: [
+        { id: 'task-owned-project', projectId: 'project-owned', status: 'not-started' },
+        { id: 'task-owned-mission', missionId: 'mission-owned', status: 'not-started' },
+        { id: 'task-victim-project', projectId: 'project-victim', status: 'not-started' },
+        { id: 'task-unowned', status: 'not-started' },
+      ],
+    });
+    const { server, tools } = makeCapturingServer();
+    const actor = makeMemberActor('authenticated-user');
+
+    service.registerTools(server, actor);
+
+    const projects = JSON.parse(
+      (await getTool(tools, 'brain_list_projects').handler({})).content[0]!.text,
+    );
+    expect(projects.map((project: { id: string }) => project.id)).toEqual(['project-owned']);
+
+    const missions = JSON.parse(
+      (await getTool(tools, 'brain_list_missions').handler({})).content[0]!.text,
+    );
+    expect(missions.map((mission: { id: string }) => mission.id)).toEqual(['mission-owned']);
+
+    const tasks = JSON.parse(
+      (await getTool(tools, 'brain_list_tasks').handler({})).content[0]!.text,
+    );
+    expect(tasks.map((task: { id: string }) => task.id)).toEqual([
+      'task-owned-project',
+      'task-owned-mission',
+    ]);
+  });
+
+  it('enforces tenant boundaries for tenant-admin brain project, mission, and task reads', async () => {
+    const { service } = makeService({
+      projects: [
+        {
+          id: 'project-tenant-a',
+          ownerId: 'other-user-a',
+          teamId: 'tenant-a',
+          name: 'same tenant',
+        },
+        {
+          id: 'project-tenant-b',
+          ownerId: 'other-user-b',
+          teamId: 'tenant-b',
+          name: 'other tenant',
+        },
+      ],
+      missions: [
+        { id: 'mission-tenant-a', tenantId: 'tenant-a', projectId: 'project-tenant-a' },
+        { id: 'mission-tenant-b', tenantId: 'tenant-b', projectId: 'project-tenant-b' },
+      ],
+      tasks: [
+        { id: 'task-tenant-a', projectId: 'project-tenant-a', status: 'not-started' },
+        { id: 'task-tenant-b', projectId: 'project-tenant-b', status: 'not-started' },
+      ],
+    });
+    const { server, tools } = makeCapturingServer();
+    const actor = makeAdminActor('tenant-admin-user', 'tenant-a');
+
+    service.registerTools(server, actor);
+
+    const projects = JSON.parse(
+      (await getTool(tools, 'brain_list_projects').handler({})).content[0]!.text,
+    );
+    expect(projects.map((project: { id: string }) => project.id)).toEqual(['project-tenant-a']);
+
+    const missions = JSON.parse(
+      (await getTool(tools, 'brain_list_missions').handler({})).content[0]!.text,
+    );
+    expect(missions.map((mission: { id: string }) => mission.id)).toEqual(['mission-tenant-a']);
+
+    const tasks = JSON.parse(
+      (await getTool(tools, 'brain_list_tasks').handler({})).content[0]!.text,
+    );
+    expect(tasks.map((task: { id: string }) => task.id)).toEqual(['task-tenant-a']);
+  });
+
+  it('denies tenant-admin task writes outside the authenticated tenant', async () => {
+    const { service, brain } = makeService({
+      projects: [
+        { id: 'project-tenant-a', ownerId: 'other-user-a', teamId: 'tenant-a' },
+        { id: 'project-tenant-b', ownerId: 'other-user-b', teamId: 'tenant-b' },
+      ],
+      missions: [
+        { id: 'mission-tenant-a', tenantId: 'tenant-a', projectId: 'project-tenant-a' },
+        { id: 'mission-tenant-b', tenantId: 'tenant-b', projectId: 'project-tenant-b' },
+      ],
+      tasks: [
+        { id: 'task-tenant-a', projectId: 'project-tenant-a', status: 'not-started' },
+        { id: 'task-tenant-b', projectId: 'project-tenant-b', status: 'not-started' },
+      ],
+    });
+    const { server, tools } = makeCapturingServer();
+    const actor = makeAdminActor('tenant-admin-user', 'tenant-a');
+
+    service.registerTools(server, actor);
+
+    await expect(
+      getTool(tools, 'brain_create_task').handler({
+        title: 'unscoped tenant write',
+      }),
+    ).rejects.toThrow('MCP task scope denied');
+    expect(brain.tasks.create).not.toHaveBeenCalled();
+
+    await expect(
+      getTool(tools, 'brain_create_task').handler({
+        title: 'cross-tenant write',
+        projectId: 'project-tenant-b',
+      }),
+    ).rejects.toThrow('MCP task project scope denied');
+    expect(brain.tasks.create).not.toHaveBeenCalled();
+
+    await expect(
+      getTool(tools, 'brain_update_task').handler({
+        id: 'task-tenant-a',
+        projectId: 'project-tenant-b',
+      }),
+    ).rejects.toThrow('MCP task project scope denied');
+    expect(brain.tasks.update).not.toHaveBeenCalled();
+
+    const updateResult = await getTool(tools, 'brain_update_task').handler({
+      id: 'task-tenant-b',
+      title: 'cross-tenant update',
+    });
+    expect(updateResult.content[0]!.text).toBe('Task not found: task-tenant-b');
+    expect(brain.tasks.update).not.toHaveBeenCalled();
+
+    await getTool(tools, 'brain_create_task').handler({
+      title: 'same-tenant write',
+      projectId: 'project-tenant-a',
+    });
+    expect(brain.tasks.create).toHaveBeenCalledWith(
+      expect.objectContaining({ projectId: 'project-tenant-a', title: 'same-tenant write' }),
+    );
+  });
+
+  it('keeps admin-only coordination tools on server-derived paths', async () => {
+    const { service, coord } = makeService();
+    const { server, tools } = makeCapturingServer();
+    const member = makeMemberActor('authenticated-user');
+    const tenantAdmin = makeAdminActor('admin-user');
+    const platformAdmin = makePlatformAdminActor('platform-admin-user');
+
+    service.registerTools(server, member);
+    const memberTool = getTool(tools, 'coord_list_tasks');
+    expect(memberTool.inputSchema.safeParse({ projectPath: '/tmp/victim' }).success).toBe(false);
+    await expect(memberTool.handler({})).rejects.toThrow('MCP tool scope denied: coord:read');
+
+    tools.clear();
+    service.registerTools(server, tenantAdmin);
+    const tenantAdminTool = getTool(tools, 'coord_list_tasks');
+    await expect(tenantAdminTool.handler({})).rejects.toThrow('MCP tool scope denied: coord:read');
+
+    tools.clear();
+    service.registerTools(server, platformAdmin);
+    const platformAdminTool = getTool(tools, 'coord_list_tasks');
+    await platformAdminTool.handler({ projectPath: '/tmp/victim' });
+    expect(coord.listTasks).toHaveBeenCalledWith(process.cwd());
+  });
+
+  it('does not attach a guessed or stale-scope MCP session to another authenticated context', async () => {
+    const { service } = makeService();
+    const owner = makeMemberActor('owner-user');
+    const attacker = makeMemberActor('attacker-user');
+    const admin = makeAdminActor('admin-user');
+    const downgradedAdmin = makeMemberActor('admin-user');
+
+    const { sessionId, transport } = service.createSession(owner);
+    const staleSession = service.createSession(admin);
+
+    expect(service.getSession(sessionId, owner)).toBe(transport);
+    expect(service.getSession(sessionId, attacker)).toBeNull();
+    expect(service.getSession(sessionId, owner)).toBe(transport);
+    expect(service.getSession(staleSession.sessionId, downgradedAdmin)).toBeNull();
+    expect(service.getSession(staleSession.sessionId, admin)).toBe(staleSession.transport);
+
+    await service.onModuleDestroy();
+  });
+});

apps/gateway/src/mcp/mcp.service.ts

@@ -10,11 +10,216 @@ import { MEMORY } from '../memory/memory.tokens.js';
 import { EmbeddingService } from '../memory/embedding.service.js';
 import { CoordService } from '../coord/coord.service.js';
 
+export const MCP_CALLER_IDENTITY_FIELDS = [
+  'actorId',
+  'actor',
+  'authenticatedUserId',
+  'channel',
+  'organizationId',
+  'ownerId',
+  'sessionUserId',
+  'teamId',
+  'tenant',
+  'tenantId',
+  'user',
+  'userId',
+] as const;
+
+type McpCallerIdentityField = (typeof MCP_CALLER_IDENTITY_FIELDS)[number];
+
+export const MCP_TOOL_SCOPES = {
+  brain_list_projects: 'brain:project:read',
+  brain_get_project: 'brain:project:read',
+  brain_list_tasks: 'brain:task:read',
+  brain_create_task: 'brain:task:write',
+  brain_update_task: 'brain:task:write',
+  brain_list_missions: 'brain:mission:read',
+  brain_list_conversations: 'brain:conversation:read',
+  memory_search: 'memory:insight:read',
+  memory_get_preferences: 'memory:preference:read',
+  memory_save_preference: 'memory:preference:write',
+  memory_save_insight: 'memory:insight:write',
+  coord_mission_status: 'coord:read',
+  coord_list_tasks: 'coord:read',
+  coord_task_detail: 'coord:read',
+} as const;
+
+export type McpToolName = keyof typeof MCP_TOOL_SCOPES;
+export type McpToolScope = (typeof MCP_TOOL_SCOPES)[McpToolName];
+
+export interface McpActorContext {
+  userId: string;
+  tenantId: string;
+  role: string;
+  channel: 'mcp';
+  correlationId: string;
+  scopes: ReadonlySet<McpToolScope>;
+}
+
 interface SessionEntry {
   server: McpServer;
   transport: StreamableHTTPServerTransport;
   createdAt: Date;
+  actor: McpActorContext;
+}
+
+const GLOBAL_ADMIN_MCP_SCOPES = new Set<McpToolScope>(Object.values(MCP_TOOL_SCOPES));
+const TENANT_ADMIN_MCP_SCOPES = new Set<McpToolScope>([
+  MCP_TOOL_SCOPES.brain_list_projects,
+  MCP_TOOL_SCOPES.brain_get_project,
+  MCP_TOOL_SCOPES.brain_list_tasks,
+  MCP_TOOL_SCOPES.brain_create_task,
+  MCP_TOOL_SCOPES.brain_update_task,
+  MCP_TOOL_SCOPES.brain_list_missions,
+  MCP_TOOL_SCOPES.brain_list_conversations,
+  MCP_TOOL_SCOPES.memory_search,
+  MCP_TOOL_SCOPES.memory_get_preferences,
+  MCP_TOOL_SCOPES.memory_save_preference,
+  MCP_TOOL_SCOPES.memory_save_insight,
+]);
+const MEMBER_MCP_SCOPES = new Set<McpToolScope>([
+  MCP_TOOL_SCOPES.brain_list_projects,
+  MCP_TOOL_SCOPES.brain_get_project,
+  MCP_TOOL_SCOPES.brain_list_tasks,
+  MCP_TOOL_SCOPES.brain_list_missions,
+  MCP_TOOL_SCOPES.brain_list_conversations,
+  MCP_TOOL_SCOPES.memory_search,
+  MCP_TOOL_SCOPES.memory_get_preferences,
+  MCP_TOOL_SCOPES.memory_save_preference,
+  MCP_TOOL_SCOPES.memory_save_insight,
+]);
+
+export function deriveMcpToolScopesForUser(input: {
+  role?: string | null;
+}): ReadonlySet<McpToolScope> {
+  if (input.role === 'platform-admin' || input.role === 'super-admin') {
+    return new Set(GLOBAL_ADMIN_MCP_SCOPES);
+  }
+  if (input.role === 'admin') {
+    return new Set(TENANT_ADMIN_MCP_SCOPES);
+  }
+  return new Set(MEMBER_MCP_SCOPES);
+}
+
+export function createMcpActorContext(input: {
   userId: string;
+  tenantId?: string;
+  role?: string | null;
+  scopes?: Iterable<McpToolScope>;
+  correlationId?: string;
+}): McpActorContext {
+  const userId = input.userId.trim();
+  if (userId.length === 0) {
+    throw new Error('MCP authenticated user is required');
+  }
+
+  return {
+    userId,
+    tenantId: input.tenantId?.trim() || `user:${userId}`,
+    role: input.role ?? 'member',
+    channel: 'mcp',
+    correlationId: input.correlationId ?? randomUUID(),
+    scopes: new Set(input.scopes ?? []),
+  };
+}
+
+export function assertNoCallerControlledIdentity(params: unknown): void {
+  if (params === null || typeof params !== 'object') return;
+
+  const keys = new Set(Object.keys(params));
+  const forbidden = MCP_CALLER_IDENTITY_FIELDS.find((field: McpCallerIdentityField) =>
+    keys.has(field),
+  );
+  if (forbidden) {
+    throw new Error(`MCP caller-controlled identity field is forbidden: ${forbidden}`);
+  }
+}
+
+export function assertMcpToolAuthorized(
+  actor: McpActorContext,
+  toolName: McpToolName,
+  params: unknown,
+): void {
+  assertNoCallerControlledIdentity(params);
+  const requiredScope = MCP_TOOL_SCOPES[toolName];
+  if (!actor.scopes.has(requiredScope)) {
+    throw new Error(`MCP tool scope denied: ${requiredScope}`);
+  }
+}
+
+function strictObject<T extends z.ZodRawShape>(shape: T): z.ZodObject<T> {
+  return z.object(shape).strict();
+}
+
+type TenantScopedLike = {
+  tenantId?: string | null;
+  organizationId?: string | null;
+  teamId?: string | null;
+};
+type ProjectLike = TenantScopedLike & { id: string; ownerId?: string | null };
+type MissionLike = TenantScopedLike & {
+  id: string;
+  projectId?: string | null;
+  userId?: string | null;
+};
+type TaskLike = TenantScopedLike & {
+  projectId?: string | null;
+  missionId?: string | null;
+  userId?: string | null;
+};
+
+function isGlobalAdminActor(actor: McpActorContext): boolean {
+  return actor.role === 'platform-admin' || actor.role === 'super-admin';
+}
+
+function isTenantAdminActor(actor: McpActorContext): boolean {
+  return actor.role === 'admin';
+}
+
+function matchesTenant(actor: McpActorContext, record: TenantScopedLike): boolean {
+  return (
+    record.tenantId === actor.tenantId ||
+    record.organizationId === actor.tenantId ||
+    record.teamId === actor.tenantId
+  );
+}
+
+function filterProjectsForActor<T extends ProjectLike>(actor: McpActorContext, projects: T[]): T[] {
+  if (isGlobalAdminActor(actor)) return projects;
+  return projects.filter(
+    (project) =>
+      project.ownerId === actor.userId ||
+      (isTenantAdminActor(actor) && matchesTenant(actor, project)),
+  );
+}
+
+function filterMissionsByDirectActorScope<T extends MissionLike>(
+  actor: McpActorContext,
+  missions: T[],
+): T[] {
+  if (isGlobalAdminActor(actor)) return missions;
+  return missions.filter(
+    (mission) =>
+      mission.userId === actor.userId ||
+      (isTenantAdminActor(actor) && matchesTenant(actor, mission)),
+  );
+}
+
+function scopesEqual(left: ReadonlySet<McpToolScope>, right: ReadonlySet<McpToolScope>): boolean {
+  if (left.size !== right.size) return false;
+  for (const scope of left) {
+    if (!right.has(scope)) return false;
+  }
+  return true;
+}
+
+function sameActorAuthorization(stored: McpActorContext, current: McpActorContext): boolean {
+  return (
+    stored.userId === current.userId &&
+    stored.tenantId === current.tenantId &&
+    stored.role === current.role &&
+    scopesEqual(stored.scopes, current.scopes)
+  );
 }
 
 @Injectable()
@@ -33,13 +238,18 @@ export class McpService implements OnModuleDestroy {
    * Creates a new MCP session with its own server + transport pair.
    * Returns the transport for use by the controller.
    */
-  createSession(userId: string): { sessionId: string; transport: StreamableHTTPServerTransport } {
+  createSession(actor: McpActorContext): {
+    sessionId: string;
+    transport: StreamableHTTPServerTransport;
+  } {
     const sessionId = randomUUID();
 
     const transport = new StreamableHTTPServerTransport({
       sessionIdGenerator: () => sessionId,
       onsessioninitialized: (id) => {
-        this.logger.log(`MCP session initialized: ${id} for user ${userId}`);
+        this.logger.log(
+          `MCP session initialized: ${id} for actor=${actor.userId} tenant=${actor.tenantId} correlation=${actor.correlationId}`,
+        );
       },
     });
 
@@ -48,7 +258,7 @@ export class McpService implements OnModuleDestroy {
       { capabilities: { tools: {} } },
     );
 
-    this.registerTools(server, userId);
+    this.registerTools(server, actor);
 
     transport.onclose = () => {
       this.logger.log(`MCP session closed: ${sessionId}`);
@@ -61,31 +271,126 @@ export class McpService implements OnModuleDestroy {
       );
     });
 
-    this.sessions.set(sessionId, { server, transport, createdAt: new Date(), userId });
+    this.sessions.set(sessionId, { server, transport, createdAt: new Date(), actor });
     return { sessionId, transport };
   }
 
   /**
-   * Returns the transport for an existing session, or null if not found.
+   * Returns the transport for an existing session only when it belongs to the
+   * currently authenticated MCP actor. Guessed or cross-tenant session IDs grant
+   * no authority.
    */
-  getSession(sessionId: string): StreamableHTTPServerTransport | null {
+  getSession(sessionId: string, actor: McpActorContext): StreamableHTTPServerTransport | null {
-    return this.sessions.get(sessionId)?.transport ?? null;
+    const entry = this.sessions.get(sessionId);
+    if (!entry) return null;
+    if (!sameActorAuthorization(entry.actor, actor)) {
+      this.logger.warn(
+        `MCP session actor or scope mismatch: session=${sessionId} actor=${actor.userId} tenant=${actor.tenantId} role=${actor.role}`,
+      );
+      return null;
+    }
+    return entry.transport;
+  }
+
+  private async isProjectAuthorized(actor: McpActorContext, projectId: string): Promise<boolean> {
+    if (isGlobalAdminActor(actor)) return true;
+    const project = (await this.brain.projects.findById(projectId)) as ProjectLike | undefined;
+    return project ? filterProjectsForActor(actor, [project]).length === 1 : false;
+  }
+
+  private async filterMissionsForActor<T extends MissionLike>(
+    actor: McpActorContext,
+    missions: T[],
+  ): Promise<T[]> {
+    if (isGlobalAdminActor(actor)) return missions;
+
+    const projects = (await this.brain.projects.findAll()) as ProjectLike[];
+    const projectIds = new Set(
+      filterProjectsForActor(actor, projects).map((project) => project.id),
+    );
+
+    return missions.filter(
+      (mission) =>
+        filterMissionsByDirectActorScope(actor, [mission]).length === 1 ||
+        (typeof mission.projectId === 'string' && projectIds.has(mission.projectId)),
+    );
+  }
+
+  private async isMissionAuthorized(actor: McpActorContext, missionId: string): Promise<boolean> {
+    if (isGlobalAdminActor(actor)) return true;
+    const mission = (await this.brain.missions.findById(missionId)) as MissionLike | undefined;
+    if (!mission) return false;
+    return (await this.filterMissionsForActor(actor, [mission])).length === 1;
+  }
+
+  private async assertTaskReferencesAuthorized(
+    actor: McpActorContext,
+    refs: { projectId?: string | null; missionId?: string | null },
+  ): Promise<void> {
+    if (refs.projectId && !(await this.isProjectAuthorized(actor, refs.projectId))) {
+      throw new Error('MCP task project scope denied');
+    }
+    if (refs.missionId && !(await this.isMissionAuthorized(actor, refs.missionId))) {
+      throw new Error('MCP task mission scope denied');
+    }
+  }
+
+  private async assertTaskCreateScopeAuthorized(
+    actor: McpActorContext,
+    refs: { projectId?: string | null; missionId?: string | null },
+  ): Promise<void> {
+    if (!isGlobalAdminActor(actor) && !refs.projectId && !refs.missionId) {
+      throw new Error('MCP task scope denied');
+    }
+    await this.assertTaskReferencesAuthorized(actor, refs);
+  }
+
+  private async filterTasksForActor<T extends TaskLike>(
+    actor: McpActorContext,
+    tasks: T[],
+  ): Promise<T[]> {
+    if (isGlobalAdminActor(actor)) return tasks;
+
+    const [projects, missions] = await Promise.all([
+      this.brain.projects.findAll(),
+      this.brain.missions.findAll(),
+    ]);
+    const projectIds = new Set(
+      filterProjectsForActor(actor, projects as ProjectLike[]).map((project) => project.id),
+    );
+    const missionIds = new Set(
+      (await this.filterMissionsForActor(actor, missions as MissionLike[])).map(
+        (mission) => mission.id,
+      ),
+    );
+
+    return tasks.filter(
+      (task) =>
+        task.userId === actor.userId ||
+        (isTenantAdminActor(actor) && matchesTenant(actor, task)) ||
+        (typeof task.projectId === 'string' && projectIds.has(task.projectId)) ||
+        (typeof task.missionId === 'string' && missionIds.has(task.missionId)),
+    );
   }
 
   /**
    * Registers all platform tools on the given McpServer instance.
    */
-  private registerTools(server: McpServer, _userId: string): void {
+  registerTools(server: McpServer, actor: McpActorContext): void {
     // ─── Brain: Project tools ────────────────────────────────────────────
 
     server.registerTool(
       'brain_list_projects',
       {
         description: 'List all projects in the brain.',
-        inputSchema: z.object({}),
+        inputSchema: strictObject({}),
       },
-      async () => {
+      async (params) => {
-        const projects = await this.brain.projects.findAll();
+        assertMcpToolAuthorized(actor, 'brain_list_projects', params);
+        const projects = filterProjectsForActor(
+          actor,
+          (await this.brain.projects.findAll()) as ProjectLike[],
+        );
         return {
           content: [{ type: 'text' as const, text: JSON.stringify(projects, null, 2) }],
         };
@@ -96,17 +401,21 @@ export class McpService implements OnModuleDestroy {
       'brain_get_project',
       {
         description: 'Get a project by ID.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
           id: z.string().describe('Project ID (UUID)'),
         }),
       },
-      async ({ id }) => {
+      async ({ id, ...params }) => {
-        const project = await this.brain.projects.findById(id);
+        assertMcpToolAuthorized(actor, 'brain_get_project', params);
+        const project = (await this.brain.projects.findById(id)) as ProjectLike | undefined;
+        const authorizedProject = project ? filterProjectsForActor(actor, [project])[0] : undefined;
         return {
           content: [
             {
               type: 'text' as const,
-              text: project ? JSON.stringify(project, null, 2) : `Project not found: ${id}`,
+              text: authorizedProject
+                ? JSON.stringify(authorizedProject, null, 2)
+                : `Project not found: ${id}`,
             },
           ],
         };
@@ -119,20 +428,23 @@ export class McpService implements OnModuleDestroy {
       'brain_list_tasks',
       {
         description: 'List tasks, optionally filtered by project, mission, or status.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
           projectId: z.string().optional().describe('Filter by project ID'),
           missionId: z.string().optional().describe('Filter by mission ID'),
           status: z.string().optional().describe('Filter by status'),
         }),
       },
-      async ({ projectId, missionId, status }) => {
+      async (params) => {
+        assertMcpToolAuthorized(actor, 'brain_list_tasks', params);
+        const { projectId, missionId, status } = params;
         type TaskStatus = 'not-started' | 'in-progress' | 'blocked' | 'done' | 'cancelled';
         let tasks;
         if (projectId) tasks = await this.brain.tasks.findByProject(projectId);
         else if (missionId) tasks = await this.brain.tasks.findByMission(missionId);
         else if (status) tasks = await this.brain.tasks.findByStatus(status as TaskStatus);
         else tasks = await this.brain.tasks.findAll();
-        return { content: [{ type: 'text' as const, text: JSON.stringify(tasks, null, 2) }] };
+        const scopedTasks = await this.filterTasksForActor(actor, tasks as TaskLike[]);
+        return { content: [{ type: 'text' as const, text: JSON.stringify(scopedTasks, null, 2) }] };
       },
     );
 
@@ -140,7 +452,7 @@ export class McpService implements OnModuleDestroy {
       'brain_create_task',
       {
         description: 'Create a new task in the brain.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
           title: z.string().describe('Task title'),
           description: z.string().optional().describe('Task description'),
           projectId: z.string().optional().describe('Project ID'),
@@ -149,6 +461,8 @@ export class McpService implements OnModuleDestroy {
         }),
       },
       async (params) => {
+        assertMcpToolAuthorized(actor, 'brain_create_task', params);
+        await this.assertTaskCreateScopeAuthorized(actor, params);
         type Priority = 'low' | 'medium' | 'high' | 'critical';
         const task = await this.brain.tasks.create({
           ...params,
@@ -162,7 +476,7 @@ export class McpService implements OnModuleDestroy {
       'brain_update_task',
       {
         description: 'Update an existing task.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
           id: z.string().describe('Task ID'),
           title: z.string().optional(),
           description: z.string().optional(),
@@ -171,9 +485,17 @@ export class McpService implements OnModuleDestroy {
             .optional()
             .describe('not-started, in-progress, blocked, done, cancelled'),
           priority: z.string().optional(),
+          projectId: z.string().optional().describe('Project ID'),
+          missionId: z.string().optional().describe('Mission ID'),
         }),
       },
       async ({ id, ...updates }) => {
+        assertMcpToolAuthorized(actor, 'brain_update_task', updates);
+        const existing = (await this.brain.tasks.findById(id)) as TaskLike | undefined;
+        if (!existing || (await this.filterTasksForActor(actor, [existing])).length === 0) {
+          return { content: [{ type: 'text' as const, text: `Task not found: ${id}` }] };
+        }
+        await this.assertTaskReferencesAuthorized(actor, updates);
         type TaskStatus = 'not-started' | 'in-progress' | 'blocked' | 'done' | 'cancelled';
         type Priority = 'low' | 'medium' | 'high' | 'critical';
         const task = await this.brain.tasks.update(id, {
@@ -198,14 +520,19 @@ export class McpService implements OnModuleDestroy {
       'brain_list_missions',
       {
         description: 'List all missions, optionally filtered by project.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
           projectId: z.string().optional().describe('Filter by project ID'),
         }),
       },
-      async ({ projectId }) => {
+      async (params) => {
-        const missions = projectId
+        assertMcpToolAuthorized(actor, 'brain_list_missions', params);
-          ? await this.brain.missions.findByProject(projectId)
+        const { projectId } = params;
-          : await this.brain.missions.findAll();
+        const missions = await this.filterMissionsForActor(
+          actor,
+          (projectId
+            ? await this.brain.missions.findByProject(projectId)
+            : await this.brain.missions.findAll()) as MissionLike[],
+        );
         return { content: [{ type: 'text' as const, text: JSON.stringify(missions, null, 2) }] };
       },
     );
@@ -213,13 +540,12 @@ export class McpService implements OnModuleDestroy {
     server.registerTool(
       'brain_list_conversations',
       {
-        description: 'List conversations for a user.',
+        description: 'List conversations for the authenticated MCP actor.',
-        inputSchema: z.object({
+        inputSchema: strictObject({}),
-          userId: z.string().describe('User ID'),
-        }),
       },
-      async ({ userId }) => {
+      async (params) => {
-        const conversations = await this.brain.conversations.findAll(userId);
+        assertMcpToolAuthorized(actor, 'brain_list_conversations', params);
+        const conversations = await this.brain.conversations.findAll(actor.userId);
         return {
           content: [{ type: 'text' as const, text: JSON.stringify(conversations, null, 2) }],
         };
@@ -232,14 +558,15 @@ export class McpService implements OnModuleDestroy {
       'memory_search',
       {
         description:
-          'Search across stored insights and knowledge using natural language. Returns semantically similar results.',
+          'Search stored insights and knowledge for the authenticated MCP actor using natural language.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
-          userId: z.string().describe('User ID to search memory for'),
           query: z.string().describe('Natural language search query'),
           limit: z.number().optional().describe('Max results (default 5)'),
         }),
       },
-      async ({ userId, query, limit }) => {
+      async (params) => {
+        assertMcpToolAuthorized(actor, 'memory_search', params);
+        const { query, limit } = params;
         if (!this.embeddings.available) {
           return {
             content: [
@@ -251,7 +578,11 @@ export class McpService implements OnModuleDestroy {
           };
         }
         const embedding = await this.embeddings.embed(query);
-        const results = await this.memory.insights.searchByEmbedding(userId, embedding, limit ?? 5);
+        const results = await this.memory.insights.searchByEmbedding(
+          actor.userId,
+          embedding,
+          limit ?? 5,
+        );
         return { content: [{ type: 'text' as const, text: JSON.stringify(results, null, 2) }] };
       },
     );
@@ -259,20 +590,21 @@ export class McpService implements OnModuleDestroy {
     server.registerTool(
       'memory_get_preferences',
       {
-        description: 'Retrieve stored preferences for a user.',
+        description: 'Retrieve stored preferences for the authenticated MCP actor.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
-          userId: z.string().describe('User ID'),
           category: z
             .string()
             .optional()
             .describe('Filter by category: communication, coding, workflow, appearance, general'),
         }),
       },
-      async ({ userId, category }) => {
+      async (params) => {
+        assertMcpToolAuthorized(actor, 'memory_get_preferences', params);
+        const { category } = params;
         type Cat = 'communication' | 'coding' | 'workflow' | 'appearance' | 'general';
         const prefs = category
-          ? await this.memory.preferences.findByUserAndCategory(userId, category as Cat)
+          ? await this.memory.preferences.findByUserAndCategory(actor.userId, category as Cat)
-          : await this.memory.preferences.findByUser(userId);
+          : await this.memory.preferences.findByUser(actor.userId);
         return { content: [{ type: 'text' as const, text: JSON.stringify(prefs, null, 2) }] };
       },
     );
@@ -281,9 +613,8 @@ export class McpService implements OnModuleDestroy {
       'memory_save_preference',
       {
         description:
-          'Store a learned user preference (e.g., "prefers tables over paragraphs", "timezone: America/Chicago").',
+          'Store a learned preference for the authenticated MCP actor (e.g., "prefers tables over paragraphs").',
-        inputSchema: z.object({
+        inputSchema: strictObject({
-          userId: z.string().describe('User ID'),
           key: z.string().describe('Preference key'),
           value: z.string().describe('Preference value (JSON string)'),
           category: z
@@ -292,7 +623,9 @@ export class McpService implements OnModuleDestroy {
             .describe('Category: communication, coding, workflow, appearance, general'),
         }),
       },
-      async ({ userId, key, value, category }) => {
+      async (params) => {
+        assertMcpToolAuthorized(actor, 'memory_save_preference', params);
+        const { key, value, category } = params;
         type Cat = 'communication' | 'coding' | 'workflow' | 'appearance' | 'general';
         let parsedValue: unknown;
         try {
@@ -301,7 +634,7 @@ export class McpService implements OnModuleDestroy {
           parsedValue = value;
         }
         const pref = await this.memory.preferences.upsert({
-          userId,
+          userId: actor.userId,
           key,
           value: parsedValue,
           category: (category as Cat) ?? 'general',
@@ -315,9 +648,8 @@ export class McpService implements OnModuleDestroy {
       'memory_save_insight',
       {
         description:
-          'Store a learned insight, decision, or knowledge extracted from the current interaction.',
+          'Store a learned insight, decision, or knowledge for the authenticated MCP actor.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
-          userId: z.string().describe('User ID'),
           content: z.string().describe('The insight or knowledge to store'),
           category: z
             .string()
@@ -325,11 +657,13 @@ export class McpService implements OnModuleDestroy {
             .describe('Category: decision, learning, preference, fact, pattern, general'),
         }),
       },
-      async ({ userId, content, category }) => {
+      async (params) => {
+        assertMcpToolAuthorized(actor, 'memory_save_insight', params);
+        const { content, category } = params;
         type Cat = 'decision' | 'learning' | 'preference' | 'fact' | 'pattern' | 'general';
         const embedding = this.embeddings.available ? await this.embeddings.embed(content) : null;
         const insight = await this.memory.insights.create({
-          userId,
+          userId: actor.userId,
           content,
           embedding,
           source: 'agent',
@@ -346,16 +680,11 @@ export class McpService implements OnModuleDestroy {
       {
         description:
           'Get the current orchestration mission status including milestones, tasks, and active session.',
-        inputSchema: z.object({
+        inputSchema: strictObject({}),
-          projectPath: z
-            .string()
-            .optional()
-            .describe('Project path. Defaults to gateway working directory.'),
-        }),
       },
-      async ({ projectPath }) => {
+      async (params) => {
-        const resolvedPath = projectPath ?? process.cwd();
+        assertMcpToolAuthorized(actor, 'coord_mission_status', params);
-        const status = await this.coordService.getMissionStatus(resolvedPath);
+        const status = await this.coordService.getMissionStatus(process.cwd());
         return {
           content: [
             {
@@ -371,16 +700,11 @@ export class McpService implements OnModuleDestroy {
       'coord_list_tasks',
       {
         description: 'List all tasks from the orchestration TASKS.md file.',
-        inputSchema: z.object({
+        inputSchema: strictObject({}),
-          projectPath: z
-            .string()
-            .optional()
-            .describe('Project path. Defaults to gateway working directory.'),
-        }),
       },
-      async ({ projectPath }) => {
+      async (params) => {
-        const resolvedPath = projectPath ?? process.cwd();
+        assertMcpToolAuthorized(actor, 'coord_list_tasks', params);
-        const tasks = await this.coordService.listTasks(resolvedPath);
+        const tasks = await this.coordService.listTasks(process.cwd());
         return { content: [{ type: 'text' as const, text: JSON.stringify(tasks, null, 2) }] };
       },
     );
@@ -389,17 +713,14 @@ export class McpService implements OnModuleDestroy {
       'coord_task_detail',
       {
         description: 'Get detailed status for a specific orchestration task.',
-        inputSchema: z.object({
+        inputSchema: strictObject({
           taskId: z.string().describe('Task ID (e.g. P2-005)'),
-          projectPath: z
-            .string()
-            .optional()
-            .describe('Project path. Defaults to gateway working directory.'),
         }),
       },
-      async ({ taskId, projectPath }) => {
+      async (params) => {
-        const resolvedPath = projectPath ?? process.cwd();
+        assertMcpToolAuthorized(actor, 'coord_task_detail', params);
-        const detail = await this.coordService.getTaskStatus(resolvedPath, taskId);
+        const { taskId } = params;
+        const detail = await this.coordService.getTaskStatus(process.cwd(), taskId);
         return {
           content: [
             {

apps/gateway/src/plugin/discord-ingress.security.spec.ts

@@ -0,0 +1,89 @@
+import { describe, expect, it } from 'vitest';
+import {
+  createDiscordIngressEnvelope,
+  verifyDiscordIngressEnvelope,
+  type DiscordIngressPayload,
+} from '@mosaicstack/discord-plugin';
+import { validateDiscordServiceToken } from '../chat/chat.gateway-auth.js';
+import { DiscordReplayProtector } from './discord-replay-protector.js';
+
+const SERVICE_TOKEN = 'test-service-token';
+
+function createPayload(overrides: Partial<DiscordIngressPayload> = {}): DiscordIngressPayload {
+  return {
+    correlationId: 'correlation-001',
+    messageId: 'discord-message-001',
+    guildId: 'guild-001',
+    channelId: 'channel-001',
+    userId: 'user-001',
+    conversationId: 'discord-channel-001',
+    content: 'hello Tess',
+    ...overrides,
+  };
+}
+
+describe('Discord ingress security', () => {
+  it('accepts only the configured Discord service identity', () => {
+    expect(validateDiscordServiceToken(SERVICE_TOKEN, SERVICE_TOKEN)).toBe(true);
+    expect(validateDiscordServiceToken('wrong-service-token', SERVICE_TOKEN)).toBe(false);
+    expect(validateDiscordServiceToken(undefined, SERVICE_TOKEN)).toBe(false);
+  });
+
+  it('rejects unauthenticated or tampered service envelopes', () => {
+    const envelope = createDiscordIngressEnvelope(createPayload(), SERVICE_TOKEN);
+
+    expect(verifyDiscordIngressEnvelope(envelope, SERVICE_TOKEN)).toEqual(createPayload());
+    expect(verifyDiscordIngressEnvelope(envelope, 'wrong-service-token')).toBeNull();
+    expect(
+      verifyDiscordIngressEnvelope(
+        { ...envelope, payload: { ...envelope.payload, content: 'forged command' } },
+        SERVICE_TOKEN,
+      ),
+    ).toBeNull();
+  });
+
+  it.each([
+    ['guild', { guildId: 'unlisted-guild' }],
+    ['channel', { channelId: 'unlisted-channel' }],
+    ['user', { userId: 'unlisted-user' }],
+  ])(
+    'rejects an unallowlisted Discord %s',
+    (_kind: string, overrides: Partial<DiscordIngressPayload>) => {
+      const envelope = createDiscordIngressEnvelope(createPayload(overrides), SERVICE_TOKEN);
+
+      expect(
+        verifyDiscordIngressEnvelope(envelope, SERVICE_TOKEN, {
+          guildIds: ['guild-001'],
+          channelIds: ['channel-001'],
+          userIds: ['user-001'],
+        }),
+      ).toBeNull();
+    },
+  );
+
+  it('retains Discord message and correlation IDs after authenticated allowlisted validation', () => {
+    const payload = createPayload({
+      correlationId: 'correlation-trace-123',
+      messageId: 'discord-snowflake-987',
+    });
+    const envelope = createDiscordIngressEnvelope(payload, SERVICE_TOKEN);
+
+    expect(
+      verifyDiscordIngressEnvelope(envelope, SERVICE_TOKEN, {
+        guildIds: ['guild-001'],
+        channelIds: ['channel-001'],
+        userIds: ['user-001'],
+      }),
+    ).toEqual(payload);
+  });
+
+  it('rejects a replayed Discord message ID while retaining bounded replay state', () => {
+    const replayProtector = new DiscordReplayProtector(60_000, 2);
+
+    expect(replayProtector.claim('discord-message-001')).toBe(true);
+    expect(replayProtector.claim('discord-message-001')).toBe(false);
+    expect(replayProtector.claim('discord-message-002')).toBe(true);
+    expect(replayProtector.claim('discord-message-003')).toBe(true);
+    expect(replayProtector.size).toBe(2);
+  });
+});

apps/gateway/src/plugin/discord-replay-protector.ts

@@ -0,0 +1,40 @@
+/**
+ * Bounded replay cache for Discord's globally unique native message IDs.
+ * Durable ingress idempotency is added with Tess's canonical inbox/outbox work.
+ */
+export class DiscordReplayProtector {
+  private readonly claimedAt = new Map<string, number>();
+
+  constructor(
+    private readonly ttlMs = 15 * 60 * 1000,
+    private readonly maxEntries = 10_000,
+  ) {}
+
+  get size(): number {
+    return this.claimedAt.size;
+  }
+
+  /** Claims an ID exactly once within its bounded retention window. */
+  claim(messageId: string, now = Date.now()): boolean {
+    this.prune(now);
+    if (this.claimedAt.has(messageId)) return false;
+
+    this.claimedAt.set(messageId, now);
+    this.evictOverflow();
+    return true;
+  }
+
+  private prune(now: number): void {
+    for (const [messageId, claimedAt] of this.claimedAt) {
+      if (now - claimedAt >= this.ttlMs) this.claimedAt.delete(messageId);
+    }
+  }
+
+  private evictOverflow(): void {
+    while (this.claimedAt.size > this.maxEntries) {
+      const oldestMessageId = this.claimedAt.keys().next().value;
+      if (oldestMessageId === undefined) return;
+      this.claimedAt.delete(oldestMessageId);
+    }
+  }
+}

apps/gateway/src/plugin/plugin.module.ts

@@ -50,19 +50,41 @@ class TelegramChannelPluginAdapter implements IChannelPlugin {
 
 const DEFAULT_GATEWAY_URL = 'http://localhost:14242';
 
+function requiredDiscordAllowlist(name: string): string[] {
+  const value = process.env[name]
+    ?.split(',')
+    .map((id: string): string => id.trim())
+    .filter((id: string): boolean => id.length > 0);
+  if (!value || value.length === 0) {
+    throw new Error(`${name} is required when DISCORD_BOT_TOKEN is configured`);
+  }
+  return value;
+}
+
 function createPluginRegistry(): IChannelPlugin[] {
   const plugins: IChannelPlugin[] = [];
   const discordToken = process.env['DISCORD_BOT_TOKEN'];
   const discordGuildId = process.env['DISCORD_GUILD_ID'];
   const discordGatewayUrl = process.env['DISCORD_GATEWAY_URL'] ?? DEFAULT_GATEWAY_URL;
+  const discordServiceToken = process.env['DISCORD_SERVICE_TOKEN'];
+  const discordServiceUserId = process.env['DISCORD_SERVICE_USER_ID'];
 
   if (discordToken) {
+    if (!discordServiceToken || !discordServiceUserId) {
+      throw new Error(
+        'DISCORD_SERVICE_TOKEN and DISCORD_SERVICE_USER_ID are required when DISCORD_BOT_TOKEN is configured',
+      );
+    }
     plugins.push(
       new DiscordChannelPluginAdapter(
         new DiscordPlugin({
           token: discordToken,
           guildId: discordGuildId,
           gatewayUrl: discordGatewayUrl,
+          serviceToken: discordServiceToken,
+          allowedGuildIds: requiredDiscordAllowlist('DISCORD_ALLOWED_GUILD_IDS'),
+          allowedChannelIds: requiredDiscordAllowlist('DISCORD_ALLOWED_CHANNEL_IDS'),
+          allowedUserIds: requiredDiscordAllowlist('DISCORD_ALLOWED_USER_IDS'),
         }),
       ),
     );

apps/gateway/src/preferences/system-override.service.ts

@@ -1,9 +1,13 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { createQueue, type QueueHandle } from '@mosaicstack/queue';
+import type { ActorTenantScope } from '../auth/session-scope.js';
 
-const SESSION_SYSTEM_KEY = (sessionId: string) => `mosaic:session:${sessionId}:system`;
+const scopedSessionId = (sessionId: string, scope: ActorTenantScope) =>
-const SESSION_SYSTEM_FRAGMENTS_KEY = (sessionId: string) =>
+  `${scope.tenantId}:${scope.userId}:${sessionId}`;
-  `mosaic:session:${sessionId}:system:fragments`;
+const SESSION_SYSTEM_KEY = (sessionId: string, scope: ActorTenantScope) =>
+  `mosaic:session:${scopedSessionId(sessionId, scope)}:system`;
+const SESSION_SYSTEM_FRAGMENTS_KEY = (sessionId: string, scope: ActorTenantScope) =>
+  `mosaic:session:${scopedSessionId(sessionId, scope)}:system:fragments`;
 const SYSTEM_OVERRIDE_TTL_SECONDS = 604800; // 7 days
 
 interface OverrideFragment {
@@ -20,9 +24,9 @@ export class SystemOverrideService {
     this.handle = createQueue();
   }
 
-  async set(sessionId: string, override: string): Promise<void> {
+  async set(sessionId: string, override: string, scope: ActorTenantScope): Promise<void> {
     // Load existing fragments
-    const existing = await this.handle.redis.get(SESSION_SYSTEM_FRAGMENTS_KEY(sessionId));
+    const existing = await this.handle.redis.get(SESSION_SYSTEM_FRAGMENTS_KEY(sessionId, scope));
     const fragments: OverrideFragment[] = existing
       ? (JSON.parse(existing) as OverrideFragment[])
       : [];
@@ -37,11 +41,11 @@ export class SystemOverrideService {
     // Store both: fragments array and condensed result
     const pipeline = this.handle.redis.pipeline();
     pipeline.setex(
-      SESSION_SYSTEM_FRAGMENTS_KEY(sessionId),
+      SESSION_SYSTEM_FRAGMENTS_KEY(sessionId, scope),
       SYSTEM_OVERRIDE_TTL_SECONDS,
       JSON.stringify(fragments),
     );
-    pipeline.setex(SESSION_SYSTEM_KEY(sessionId), SYSTEM_OVERRIDE_TTL_SECONDS, condensed);
+    pipeline.setex(SESSION_SYSTEM_KEY(sessionId, scope), SYSTEM_OVERRIDE_TTL_SECONDS, condensed);
     await pipeline.exec();
 
     this.logger.debug(
@@ -49,21 +53,21 @@ export class SystemOverrideService {
     );
   }
 
-  async get(sessionId: string): Promise<string | null> {
+  async get(sessionId: string, scope: ActorTenantScope): Promise<string | null> {
-    return this.handle.redis.get(SESSION_SYSTEM_KEY(sessionId));
+    return this.handle.redis.get(SESSION_SYSTEM_KEY(sessionId, scope));
   }
 
-  async renew(sessionId: string): Promise<void> {
+  async renew(sessionId: string, scope: ActorTenantScope): Promise<void> {
     const pipeline = this.handle.redis.pipeline();
-    pipeline.expire(SESSION_SYSTEM_KEY(sessionId), SYSTEM_OVERRIDE_TTL_SECONDS);
+    pipeline.expire(SESSION_SYSTEM_KEY(sessionId, scope), SYSTEM_OVERRIDE_TTL_SECONDS);
-    pipeline.expire(SESSION_SYSTEM_FRAGMENTS_KEY(sessionId), SYSTEM_OVERRIDE_TTL_SECONDS);
+    pipeline.expire(SESSION_SYSTEM_FRAGMENTS_KEY(sessionId, scope), SYSTEM_OVERRIDE_TTL_SECONDS);
     await pipeline.exec();
   }
 
-  async clear(sessionId: string): Promise<void> {
+  async clear(sessionId: string, scope: ActorTenantScope): Promise<void> {
     await this.handle.redis.del(
-      SESSION_SYSTEM_KEY(sessionId),
+      SESSION_SYSTEM_KEY(sessionId, scope),
-      SESSION_SYSTEM_FRAGMENTS_KEY(sessionId),
+      SESSION_SYSTEM_FRAGMENTS_KEY(sessionId, scope),
     );
     this.logger.debug(`Cleared system override for session ${sessionId}`);
   }

deploy/portainer/README.md

@@ -0,0 +1,70 @@
+# deploy/portainer/
+
+Portainer stack templates for Mosaic Stack deployments.
+
+## Files
+
+| File                       | Purpose                                                                                                        |
+| -------------------------- | -------------------------------------------------------------------------------------------------------------- |
+| `federated-test.stack.yml` | Docker Swarm stack for federation end-to-end test instances (`mos-test-1.woltje.com`, `mos-test-2.woltje.com`) |
+
+---
+
+## federated-test.stack.yml
+
+A self-contained Swarm stack that boots a federated-tier Mosaic gateway with co-located Postgres 17 (pgvector) and Valkey 8. This is a **test template** — production deployments will use a separate template with stricter resource limits and Docker secrets.
+
+### Deploy via Portainer UI
+
+1. Log into Portainer.
+2. Navigate to **Stacks → Add stack**.
+3. Set a stack name matching `STACK_NAME` below (e.g. `mos-test-1`).
+4. Choose **Web editor** and paste the contents of `federated-test.stack.yml`.
+5. Scroll to **Environment variables** and add each variable listed below.
+6. Click **Deploy the stack**.
+
+### Required environment variables
+
+| Variable             | Example                                 | Notes                                                    |
+| -------------------- | --------------------------------------- | -------------------------------------------------------- |
+| `STACK_NAME`         | `mos-test-1`                            | Unique per stack — used in Traefik router/service names. |
+| `HOST_FQDN`          | `mos-test-1.woltje.com`                 | Fully-qualified hostname served by this stack.           |
+| `POSTGRES_PASSWORD`  | _(generate randomly)_                   | Database password. Do **not** reuse between stacks.      |
+| `BETTER_AUTH_SECRET` | _(generate: `openssl rand -base64 32`)_ | BetterAuth session signing key.                          |
+| `BETTER_AUTH_URL`    | `https://mos-test-1.woltje.com`         | Public base URL of the gateway.                          |
+
+Optional variables (uncomment in the YAML or set in Portainer):
+
+| Variable                      | Notes                                                      |
+| ----------------------------- | ---------------------------------------------------------- |
+| `ANTHROPIC_API_KEY`           | Enable Claude models.                                      |
+| `OPENAI_API_KEY`              | Enable OpenAI models.                                      |
+| `OTEL_EXPORTER_OTLP_ENDPOINT` | Forward traces to a collector (e.g. `http://jaeger:4318`). |
+
+### Required external resources
+
+Before deploying, ensure the following exist on the Swarm:
+
+1. **`traefik-public` overlay network** — shared network Traefik uses to route traffic to stacks.
+   ```bash
+   docker network create --driver overlay --attachable traefik-public
+   ```
+2. **`letsencrypt` cert resolver** — configured in the Traefik Swarm stack. The stack template references `tls.certresolver=letsencrypt`; the name must match your Traefik config.
+3. **DNS A record** — `${HOST_FQDN}` must resolve to the Swarm ingress IP (or a Cloudflare-proxied address pointing there).
+
+### Deployed instances
+
+| Stack name   | HOST_FQDN               | Purpose                            |
+| ------------ | ----------------------- | ---------------------------------- |
+| `mos-test-1` | `mos-test-1.woltje.com` | DEPLOY-03 — first federation peer  |
+| `mos-test-2` | `mos-test-2.woltje.com` | DEPLOY-04 — second federation peer |
+
+### Image
+
+The gateway image is pinned by digest to `fed-v0.1.0-m1` (verified in DEPLOY-01). Update the digest in the YAML when promoting a new build — never use `:latest` or a mutable tag in Swarm.
+
+### Notes
+
+- This template boots a **vanilla M1-baseline gateway** in federated tier. Federation grants (Step-CA, mTLS) are M2+ scope and not included here.
+- Each stack gets its own Postgres volume (`postgres-data`) and Valkey volume (`valkey-data`) scoped to the stack name by Swarm.
+- `depends_on` is honoured by Compose but ignored by Swarm — healthchecks on Postgres and Valkey ensure the gateway retries until they are ready.

deploy/portainer/federated-test.stack.yml

@@ -0,0 +1,160 @@
+# deploy/portainer/federated-test.stack.yml
+#
+# Portainer / Docker Swarm stack template — federated-tier test instance
+#
+# PURPOSE
+#   Deploys a single federated-tier Mosaic gateway with co-located Postgres
+#   (pgvector) and Valkey for end-to-end federation testing. Intended for
+#   mos-test-1.woltje.com and mos-test-2.woltje.com (DEPLOY-03/04).
+#
+# REQUIRED ENV VARS (set per-stack in Portainer → Stacks → Environment variables)
+#   STACK_NAME          Unique name for Traefik router/service labels.
+#                       Examples: mos-test-1, mos-test-2
+#   HOST_FQDN           Fully-qualified domain name served by this stack.
+#                       Examples: mos-test-1.woltje.com, mos-test-2.woltje.com
+#   POSTGRES_PASSWORD   Database password — set per stack; do NOT commit a default.
+#   BETTER_AUTH_SECRET  Random 32-char string for BetterAuth session signing.
+#                       Generate: openssl rand -base64 32
+#   BETTER_AUTH_URL     Public gateway base URL, e.g. https://mos-test-1.woltje.com
+#
+# OPTIONAL ENV VARS (uncomment and set in Portainer to enable features)
+#   ANTHROPIC_API_KEY   sk-ant-...
+#   OPENAI_API_KEY      sk-...
+#   OTEL_EXPORTER_OTLP_ENDPOINT  http://<collector>:4318
+#   OTEL_SERVICE_NAME   (default: mosaic-gateway)
+#
+# REQUIRED EXTERNAL RESOURCES
+#   traefik-public      Docker overlay network — must exist before deploying.
+#                       Create: docker network create --driver overlay --attachable traefik-public
+#   letsencrypt         Traefik cert resolver configured on the Swarm manager.
+#   DNS A record        ${HOST_FQDN} → Swarm ingress IP (or Cloudflare proxy).
+#
+# IMAGE
+#   Pinned to sha-9f1a081 (main HEAD post-#488 Dockerfile fix). The previous
+#   pin (fed-v0.1.0-m1, sha256:9b72e2...) had a broken pnpm copy and could
+#   not resolve @mosaicstack/storage at runtime. The new digest was smoke-
+#   tested locally — gateway boots, imports resolve, tier-detector runs.
+#   Update digest here when promoting a new build.
+#
+# HEALTHCHECK NOTE (2026-04-21)
+#   Switched from busybox wget to node http.get on 127.0.0.1 (not localhost) to
+#   avoid IPv6 resolution issues on Alpine. Retries increased to 5 and
+#   start_period to 60s to cover the NestJS/GC cold-start window (~40-50s).
+#   restart_policy set to `any` so SIGTERM/clean-exit also triggers restart.
+#
+# NOTE: This is a TEST template — production deployments use a separate
+#       parameterised template with stricter resource limits and secrets.
+
+version: '3.9'
+
+services:
+  gateway:
+    image: git.mosaicstack.dev/mosaicstack/stack/gateway@sha256:1069117740e00ccfeba357cae38c43f3729fe5ae702740ce474f6512414d7c02
+    # Tag for human reference: sha-9f1a081 (post-#488 Dockerfile fix; smoke-tested locally)
+    environment:
+      # ── Tier ───────────────────────────────────────────────────────────────
+      MOSAIC_TIER: federated
+
+      # ── Database ───────────────────────────────────────────────────────────
+      DATABASE_URL: postgres://gateway:${POSTGRES_PASSWORD}@postgres:5432/mosaic
+
+      # ── Queue ──────────────────────────────────────────────────────────────
+      VALKEY_URL: redis://valkey:6379
+
+      # ── Gateway ────────────────────────────────────────────────────────────
+      GATEWAY_PORT: '3000'
+      GATEWAY_CORS_ORIGIN: https://${HOST_FQDN}
+
+      # ── Auth ───────────────────────────────────────────────────────────────
+      BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      BETTER_AUTH_URL: https://${HOST_FQDN}
+
+      # ── Observability ──────────────────────────────────────────────────────
+      OTEL_SERVICE_NAME: ${STACK_NAME:-mosaic-gateway}
+      # OTEL_EXPORTER_OTLP_ENDPOINT: http://<collector>:4318
+
+      # ── AI Providers (uncomment to enable) ─────────────────────────────────
+      # ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY}
+      # OPENAI_API_KEY: ${OPENAI_API_KEY}
+    networks:
+      - federated-test
+      - traefik-public
+    deploy:
+      replicas: 1
+      restart_policy:
+        condition: any
+        delay: 5s
+        max_attempts: 3
+      labels:
+        - 'traefik.enable=true'
+        - 'traefik.docker.network=traefik-public'
+        - 'traefik.http.routers.${STACK_NAME}.rule=Host(`${HOST_FQDN}`)'
+        - 'traefik.http.routers.${STACK_NAME}.entrypoints=websecure'
+        - 'traefik.http.routers.${STACK_NAME}.tls=true'
+        - 'traefik.http.routers.${STACK_NAME}.tls.certresolver=letsencrypt'
+        - 'traefik.http.services.${STACK_NAME}.loadbalancer.server.port=3000'
+    healthcheck:
+      test:
+        - 'CMD'
+        - 'node'
+        - '-e'
+        - "require('http').get('http://127.0.0.1:3000/health',r=>process.exit(r.statusCode===200?0:1)).on('error',()=>process.exit(1))"
+      interval: 30s
+      timeout: 5s
+      retries: 5
+      start_period: 60s
+    depends_on:
+      - postgres
+      - valkey
+
+  postgres:
+    image: pgvector/pgvector:pg17
+    environment:
+      POSTGRES_USER: gateway
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: mosaic
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    networks:
+      - federated-test
+    deploy:
+      replicas: 1
+      restart_policy:
+        condition: on-failure
+        delay: 5s
+        max_attempts: 3
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -U gateway']
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+
+  valkey:
+    image: valkey/valkey:8-alpine
+    volumes:
+      - valkey-data:/data
+    networks:
+      - federated-test
+    deploy:
+      replicas: 1
+      restart_policy:
+        condition: on-failure
+        delay: 5s
+        max_attempts: 3
+    healthcheck:
+      test: ['CMD', 'valkey-cli', 'ping']
+      interval: 10s
+      timeout: 3s
+      retries: 5
+      start_period: 5s
+
+volumes:
+  postgres-data:
+  valkey-data:
+
+networks:
+  federated-test:
+    driver: overlay
+  traefik-public:
+    external: true

docker-compose.federated.yml

@@ -0,0 +1,120 @@
+# docker-compose.federated.yml — Federated tier overlay
+#
+# USAGE:
+#   docker compose -f docker-compose.federated.yml --profile federated up -d
+#
+# This file is a standalone overlay for the Mosaic federated tier.
+# It is NOT an extension of docker-compose.yml — it defines its own services
+# and named volumes so it can run independently of the base dev stack.
+#
+# IMPORTANT — HOST PORT CONFLICTS:
+#   The federated services bind the same host ports as the base dev stack
+#   (5433 for Postgres, 6380 for Valkey). You must stop the base dev stack
+#   before starting the federated stack on the same machine:
+#     docker compose down
+#     docker compose -f docker-compose.federated.yml --profile federated up -d
+#
+# pgvector extension:
+#   The vector extension is created automatically at first boot via
+#   ./infra/pg-init/01-extensions.sql (CREATE EXTENSION IF NOT EXISTS vector).
+#
+# Tier configuration:
+#   Used by `mosaic` instances configured with `tier: federated`.
+#   DEFAULT_FEDERATED_CONFIG points at:
+#     postgresql://mosaic:mosaic@localhost:5433/mosaic
+
+services:
+  postgres-federated:
+    image: pgvector/pgvector:pg17
+    profiles: [federated]
+    restart: unless-stopped
+    ports:
+      - '${PG_FEDERATED_HOST_PORT:-5433}:5432'
+    environment:
+      POSTGRES_USER: mosaic
+      POSTGRES_PASSWORD: mosaic
+      POSTGRES_DB: mosaic
+    volumes:
+      - pg_federated_data:/var/lib/postgresql/data
+      - ./infra/pg-init:/docker-entrypoint-initdb.d:ro
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -U mosaic']
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
+  valkey-federated:
+    image: valkey/valkey:8-alpine
+    profiles: [federated]
+    restart: unless-stopped
+    ports:
+      - '${VALKEY_FEDERATED_HOST_PORT:-6380}:6379'
+    volumes:
+      - valkey_federated_data:/data
+    healthcheck:
+      test: ['CMD', 'valkey-cli', 'ping']
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
+  # ---------------------------------------------------------------------------
+  # Step-CA — Mosaic Federation internal certificate authority
+  #
+  # Image: pinned to 0.27.4 (latest stable as of late 2025).
+  # `latest` is forbidden per Mosaic image policy (immutable tag required for
+  # reproducible deployments and digest-first promotion in CI).
+  #
+  # Profile: `federated` — this service must not start in non-federated dev.
+  #
+  # Password:
+  #   Dev:  bind-mount ./infra/step-ca/dev-password (gitignored; copy from
+  #         ./infra/step-ca/dev-password.example and customise locally).
+  #   Prod: replace the bind-mount with a Docker secret:
+  #           secrets:
+  #             ca_password:
+  #               external: true
+  #         and reference it as `/run/secrets/ca_password` (same path the
+  #         init script already uses).
+  #
+  # Provisioner: "mosaic-fed" (consumed by apps/gateway/src/federation/ca.service.ts)
+  # ---------------------------------------------------------------------------
+  step-ca:
+    image: smallstep/step-ca:0.27.4
+    profiles: [federated]
+    restart: unless-stopped
+    ports:
+      - '${STEP_CA_HOST_PORT:-9000}:9000'
+    volumes:
+      - step_ca_data:/home/step
+      # init script — executed as the container entrypoint
+      - ./infra/step-ca/init.sh:/usr/local/bin/mosaic-step-ca-init.sh:ro
+      # X.509 template skeleton (wired in M2-04)
+      - ./infra/step-ca/templates:/etc/step-ca-templates:ro
+      # Dev password file — GITIGNORED; copy from dev-password.example
+      # In production, replace this with a Docker secret (see comment above).
+      - ./infra/step-ca/dev-password:/run/secrets/ca_password:ro
+    entrypoint: ['/bin/sh', '/usr/local/bin/mosaic-step-ca-init.sh']
+    healthcheck:
+      # The healthcheck requires the root cert to exist, which is only true
+      # after init.sh has completed on first boot. start_period gives init
+      # time to finish before Docker starts counting retries.
+      test:
+        [
+          'CMD',
+          'step',
+          'ca',
+          'health',
+          '--ca-url',
+          'https://localhost:9000',
+          '--root',
+          '/home/step/certs/root_ca.crt',
+        ]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 30s
+
+volumes:
+  pg_federated_data:
+  valkey_federated_data:
+  step_ca_data:

docker/appservice.Dockerfile

@@ -0,0 +1,28 @@
+FROM node:22-alpine AS base
+ENV PNPM_HOME="/pnpm"
+ENV PATH="$PNPM_HOME:$PATH"
+RUN corepack enable
+
+FROM base AS builder
+WORKDIR /app
+# Copy workspace manifests first for layer-cached install
+COPY pnpm-workspace.yaml pnpm-lock.yaml package.json ./
+COPY apps/appservice/package.json ./apps/appservice/
+COPY packages/ ./packages/
+COPY plugins/ ./plugins/
+RUN pnpm install --frozen-lockfile
+COPY . .
+RUN pnpm turbo run build --filter @mosaicstack/mosaic-as...
+RUN pnpm --filter @mosaicstack/mosaic-as --prod deploy --legacy /deploy
+
+FROM base AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+COPY --from=builder /deploy/node_modules ./node_modules
+COPY --from=builder /deploy/package.json ./package.json
+COPY --from=builder /app/apps/appservice/dist ./dist
+USER node
+EXPOSE 8008
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=5 \
+  CMD ["node", "-e", "require('http').get('http://127.0.0.1:8008/health',r=>process.exit(r.statusCode===200?0:1)).on('error',()=>process.exit(1))"]
+CMD ["node", "dist/main.js"]

docker/gateway.Dockerfile

@@ -5,18 +5,27 @@ RUN corepack enable
 
 FROM base AS builder
 WORKDIR /app
+# Copy workspace manifests first for layer-cached install
 COPY pnpm-workspace.yaml pnpm-lock.yaml package.json ./
 COPY apps/gateway/package.json ./apps/gateway/
 COPY packages/ ./packages/
+COPY plugins/ ./plugins/
 RUN pnpm install --frozen-lockfile
 COPY . .
-RUN pnpm --filter @mosaic/gateway build
+# Build gateway and all of its workspace dependencies via turbo dependency graph
+RUN pnpm turbo run build --filter @mosaicstack/gateway...
+# Produce a self-contained deploy artifact: flat node_modules, no pnpm symlinks
+# --legacy is required for pnpm v10 when inject-workspace-packages is not set
+RUN pnpm --filter @mosaicstack/gateway --prod deploy --legacy /deploy
 
 FROM base AS runner
 WORKDIR /app
 ENV NODE_ENV=production
+# Use the pnpm deploy output — resolves all deps into a flat, self-contained node_modules
+COPY --from=builder /deploy/node_modules ./node_modules
+COPY --from=builder /deploy/package.json ./package.json
+# dist is declared in package.json "files" so pnpm deploy copies it into /deploy;
+# copy from builder explicitly as belt-and-suspenders
 COPY --from=builder /app/apps/gateway/dist ./dist
-COPY --from=builder /app/apps/gateway/package.json ./package.json
-COPY --from=builder /app/node_modules ./node_modules
 EXPOSE 4000
 CMD ["node", "dist/main.js"]

docs/MISSION-MANIFEST.md

@@ -1,73 +1,117 @@
-# Mission Manifest — Install UX v2
+# Mission Manifest — MVP
 
-> Persistent document tracking full mission scope, status, and session history.
+> Top-level rollup tracking Mosaic Stack MVP execution.
-> Updated by the orchestrator at each phase transition and milestone completion.
+> Workstreams have their own manifests; this document is the source of truth for MVP scope, status, and history.
+> Owner: Orchestrator (sole writer).
 
 ## Mission
 
-**ID:** install-ux-v2-20260405
+**ID:** mvp-20260312
-**Statement:** The install-ux-hardening mission shipped the plumbing (uninstall, masked password, hooks consent, unified flow, headless path), but the first real end-to-end run surfaced a critical regression and a collection of UX failings that make the wizard feel neither quick nor intelligent. This mission closes the bootstrap regression as a hotfix, then rethinks the first-run experience around a provider-first, intent-driven flow with a drill-down main menu and a genuinely fast quick-start.
+**Statement:** Ship a self-hosted, multi-user AI agent platform that consolidates the user's disparate jarvis-brain usage across home and USC workstations into a single coherent system reachable via three first-class surfaces — webUI, TUI, and CLI — with federation as the data-layer mechanism that makes cross-host agent sessions work in real time without copying user data across the boundary.
-**Phase:** Planning
+**Phase:** Execution (workstream W1 in planning-complete state)
-**Current Milestone:** IUV-M01
+**Current Workstream:** W1 — Federation v1
-**Progress:** 0 / 3 milestones
+**Progress:** 0 / 1 declared workstreams complete (more workstreams will be declared as scope is refined)
-**Status:** active
+**Status:** active (continuous since 2026-03-13)
-**Last Updated:** 2026-04-05
+**Last Updated:** 2026-04-19 (manifest authored at the rollup level; install-ux-v2 archived; W1 federation planning landed via PR #468)
-**Parent Mission:** [install-ux-hardening-20260405](./archive/missions/install-ux-hardening-20260405/MISSION-MANIFEST.md) (complete — `mosaic-v0.0.25`)
+**Source PRD:** [docs/PRD.md](./PRD.md) — Mosaic Stack v0.1.0
+**Scratchpad:** [docs/scratchpads/mvp-20260312.md](./scratchpads/mvp-20260312.md) (active since 2026-03-13; 14 prior sessions of phase-based execution)
 
 ## Context
 
-Real-run testing of `@mosaicstack/mosaic@0.0.25` uncovered:
+Jarvis (v0.2.0) was a single-host Python/Next.js assistant. The user runs sessions across 3–4 workstations split between home and USC. Today every session reaches back to a single jarvis-brain checkout, which is brittle (offline-hostile, no consolidation, no shared state beyond a single repo). A prior OpenBrain attempt punished offline use, introduced cache/latency/opacity pain, and tightly coupled every session to a remote service.
 
-1. **Critical:** admin bootstrap fails with HTTP 400 `property email should not exist` — `bootstrap.controller.ts` uses `import type { BootstrapSetupDto }`, erasing the class at runtime. Nest's `@Body()` falls back to plain `Object` metatype, and ValidationPipe with `forbidNonWhitelisted` rejects every property. One-character fix (drop the `type` keyword), but it blocks the happy path of the release that just shipped.
+The MVP solution: keep each user's home gateway as the source of truth, connect gateways gateway-to-gateway over mTLS with scoped read-only data exposure, and expose the unified experience through three coherent surfaces:
-2. The wizard reports `✔ Wizard complete` and `✔ Done` _after_ the bootstrap 400 — failure only propagates in headless mode (`wizard.ts:147`).
+
-3. The gateway port prompt does not prefill `14242` in the input buffer.
+- **webUI** — the primary visual control plane (Next.js + React 19, `apps/web`)
-4. `"What is Mosaic?"` intro copy does not mention Pi SDK (the actual agent runtime behind Claude/Codex/OpenCode).
+- **TUI** — the terminal-native interface for agent work (`packages/mosaic` wizard + Pi TUI)
-5. CORS origin prompt is confusing — the user should be able to supply an FQDN/hostname and have the system derive the CORS value.
+- **CLI** — `mosaic` command for scripted/headless workflows
-6. Skill / additional feature install section is unusable in practice.
+
-7. Quick-start asks far too many questions to be meaningfully "quick".
+Federation is required NOW because it unblocks cross-host consolidation; it is necessary but not sufficient for MVP. Additional workstreams will be declared as their scope solidifies.
-8. No drill-down main menu — everything is a linear interrogation.
+
-9. Provider setup happens late and without intelligence. An OpenClaw-style provider-first flow would let the user describe what they want in natural language, have the agent expound on it, and have the agent choose its own name based on that intent.
+## Prior Execution (March 13 → April 5)
+
+This manifest was authored on 2026-04-19 to rollup work that began 2026-03-13. Before this date, MVP work was tracked via phase-based Gitea milestones and the scratchpad — there was no rollup manifest at the `docs/MISSION-MANIFEST.md` path (the slot was occupied by sub-mission manifests for `install-ux-hardening` and then `install-ux-v2`).
+
+Prior execution outline (full detail in [scratchpads/mvp-20260312.md](./scratchpads/mvp-20260312.md)):
+
+- **Phases 0 → 7** (Gitea milestones `ms-157` → `ms-164`, issues #1–#59): foundation, core API, agent layer, web dashboard, memory, remote control, CLI/tools, polish/beta. Substantially shipped by Session 13.
+- **Phase 8** (Gitea milestone `ms-165`, issues #160–#172): platform architecture extension — teams, workspaces, `/provider` OAuth, preferences, etc. Wave-based execution plan defined at Session 14.
+- **Sub-missions** during the gap: `install-ux-hardening` (complete, `mosaic-v0.0.25`), `install-ux-v2` (complete on 2026-04-19, `0.0.27` → `0.0.29`). Both archived under `docs/archive/missions/`.
+
+Going forward, MVP execution is tracked through the **Workstreams** table below. Phase-based issue numbering is preserved on Gitea but is no longer the primary control plane.
+
+## Cross-Cutting MVP Requirements
+
+These apply to every workstream and every milestone. A workstream cannot ship if it breaks any of them.
+
+| #      | Requirement                                                                                                                                                                      |
+| ------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| MVP-X1 | Three-surface parity: every user-facing capability is reachable via webUI **and** TUI **and** CLI (read paths at minimum; mutating paths where applicable to the surface).       |
+| MVP-X2 | Multi-tenant isolation is enforced at every boundary; no cross-user leakage under any circumstance.                                                                              |
+| MVP-X3 | Auth via BetterAuth (existing); SSO adapters per PRD; admin bootstrap remains a one-shot.                                                                                        |
+| MVP-X4 | Three quality gates green before push: `pnpm typecheck`, `pnpm lint`, `pnpm format:check`.                                                                                       |
+| MVP-X5 | Federated tier (PG + pgvector + Valkey) is the canonical MVP deployment topology; local/standalone tiers continue to work for non-federated installs but are not the MVP target. |
+| MVP-X6 | OTEL tracing on every request path; `traceparent` propagated across the federation boundary in both directions.                                                                  |
+| MVP-X7 | Trunk merge strategy: branch from `main`, squash-merge via PR, never push to `main` directly.                                                                                    |
 
 ## Success Criteria
 
-- [ ] AC-1: Admin bootstrap completes successfully end-to-end on a fresh install (DTO value import, no forbidNonWhitelisted regression); covered by an integration or e2e test that exercises the real DTO binding.
+The MVP is complete when ALL declared workstreams are complete AND every cross-cutting requirement is verifiable on a live two-host deployment (woltje.com ↔ uscllc.com).
-- [ ] AC-2: Wizard fails loudly (non-zero exit, clear error) when the bootstrap stage returns `completed: false`, in both interactive and headless modes. No more silent `✔ Wizard complete` after a 400.
-- [ ] AC-3: Gateway port prompt prefills `14242` in the input field (user can press Enter to accept).
-- [ ] AC-4: `"What is Mosaic?"` intro copy mentions Pi SDK as the underlying agent runtime.
-- [ ] AC-5: Release `mosaic-v0.0.26` tagged and published to the Gitea npm registry, unblocking the 0.0.25 happy path.
-- [ ] AC-6: CORS origin prompt replaced with FQDN/hostname input; CORS string is derived from that.
-- [ ] AC-7: Skill / additional feature install section is reworked until it is actually usable end-to-end (worker defines the concrete failure modes during diagnosis).
-- [ ] AC-8: First-run flow has a drill-down main menu with at least `Plugins` (Recommended / Custom), `Providers`, and the other top-level configuration groups. Linear interrogation is gone.
-- [ ] AC-9: `Quick Start` path completes with a minimal, curated set of questions (target: under 90 seconds for a returning user; define the exact baseline during design).
-- [ ] AC-10: Provider setup happens first, driven by a natural-language intake prompt. The agent expounds on the user's intent and chooses its own name based on that intent (OpenClaw-style). Naming is confirmable / overridable.
-- [ ] AC-11: All milestones ship as merged PRs with green CI and closed issues.
 
-## Milestones
+- [ ] AC-MVP-1: All declared workstreams reach `complete` status with merged PRs and green CI
+- [ ] AC-MVP-2: A user session on the home gateway can transparently query work-gateway data subject to scope, with no data persisted across the boundary
+- [ ] AC-MVP-3: The same user-facing capability is reachable from webUI, TUI, and CLI (per MVP-X1)
+- [ ] AC-MVP-4: Two-gateway production deployment (woltje.com ↔ uscllc.com) operational ≥7 days without incident
+- [ ] AC-MVP-5: All cross-cutting requirements (MVP-X1 → MVP-X7) verified with evidence
+- [ ] AC-MVP-6: PRD `docs/PRD.md` "In Scope (v0.1.0 Beta)" list mapped to evidence (each item: shipped / explicitly deferred with rationale)
 
-| #   | ID      | Name                                                         | Status      | Branch                 | Issue | Started    | Completed |
+## Workstreams
-| --- | ------- | ------------------------------------------------------------ | ----------- | ---------------------- | ----- | ---------- | --------- |
-| 1   | IUV-M01 | Hotfix: bootstrap DTO + wizard failure + port prefill + copy | in-progress | fix/bootstrap-hotfix   | #436  | 2026-04-05 | —         |
-| 2   | IUV-M02 | UX polish: CORS/FQDN, skill installer rework                 | not-started | feat/install-ux-polish | #437  | —          | —         |
-| 3   | IUV-M03 | Provider-first intelligent flow + drill-down main menu       | not-started | feat/install-ux-intent | #438  | —          | —         |
 
-## Subagent Delegation Plan
+| #   | ID   | Name                                        | Status            | Manifest                                                                | Notes                                               |
+| --- | ---- | ------------------------------------------- | ----------------- | ----------------------------------------------------------------------- | --------------------------------------------------- |
+| W1  | FED  | Federation v1                               | planning-complete | [docs/federation/MISSION-MANIFEST.md](./federation/MISSION-MANIFEST.md) | 7 milestones, ~175K tokens, issues #460–#466 filed  |
+| W2  | TESS | Tess interaction agent                      | planning-complete | [docs/tess/MISSION-MANIFEST.md](./tess/MISSION-MANIFEST.md)             | 5 milestones; issue #706; M1 issue #707 ready       |
+| W3+ | TBD  | (additional workstreams declared as scoped) | —                 | —                                                                       | Scope creep is expected and explicitly accommodated |
 
-| Milestone | Recommended Tier | Rationale                                                             |
+### Likely Additional Workstreams (Not Yet Declared)
-| --------- | ---------------- | --------------------------------------------------------------------- |
+
-| IUV-M01   | sonnet           | Tight bug cluster with known fix sites + small release cycle          |
+These are anticipated based on the PRD `In Scope` list but are NOT counted toward MVP completion until they have their own manifest, milestones, and tracking issues. Listed here so the orchestrator knows what's likely coming.
-| IUV-M02   | sonnet           | UX rework, moderate surface, diagnostic-heavy for the skill installer |
+
-| IUV-M03   | opus             | Architectural redesign of first-run flow, state machine + LLM intake  |
+- Web dashboard parity with PRD scope (chat, tasks, projects, missions, agent status surfaces)
+- Pi TUI integration for terminal-native agent work
+- CLI completeness for headless / scripted workflows that mirror webUI capability
+- Remote control plugins (Discord priority, then Telegram)
+- Multi-user / SSO finishing (BetterAuth + Authentik/WorkOS/Keycloak adapters per PRD)
+- LLM provider expansion (Anthropic, Codex, Z.ai, Ollama, LM Studio, llama.cpp) + routing matrix
+- MCP server/client capability + skill import interface
+- Brain (`@mosaicstack/brain`) as the structured data layer on PG + vector
+
+When any of these solidify into a real workstream, add a row to the Workstreams table, create a workstream-level manifest under `docs/{workstream}/MISSION-MANIFEST.md`, and file tracking issues.
 
 ## Risks
 
-- **Hotfix regression surface** — the `import type` → `import` fix on the DTO class is one character but needs an integration test that binds the real DTO, not just a controller unit test, to prevent the same class-erasure regression from sneaking back in.
+- **Scope creep is the named risk.** Workstreams will be added; the rule is that each must have its own manifest + milestones + acceptance criteria before it consumes execution capacity.
-- **LLM-driven intake latency / offline** — M03's provider-first intent flow assumes an available LLM call to expound on user input and choose a name. Offline installs need a deterministic fallback.
+- **Federation urgency vs. surface parity** — federation is being built first because it unblocks the user, but webUI/TUI/CLI parity (MVP-X1) cannot slip indefinitely. Track surface coverage explicitly when each workstream lands.
-- **Menu vs. linear back-compat** — M03 changes the top-level flow shape; existing `tools/install.sh --yes` + env-var headless path must continue to work.
+- **Three-surface fan-out** — the same capability exposed three ways multiplies test surface and design effort. Default to a shared API/contract layer, then thin surface adapters; resist surface-specific business logic.
-- **Scope creep in M03** — "redesign the wizard" can absorb arbitrary work. Keep it bounded with explicit non-goals.
+- **Federated-tier dependency** — MVP requires PG + pgvector + Valkey; users on local/standalone tier cannot federate. This is intentional but must be communicated clearly in the wizard.
 
-## Out of Scope
+## Out of Scope (MVP)
 
-- Migrating the wizard to a GUI / web UI (still terminal-first)
+- SaaS / multi-tenant revenue model — personal/family/team tool only
-- Replacing the Gitea registry or the Woodpecker publish pipeline
+- Mobile native apps — responsive web only
-- Multi-tenant / multi-user onboarding (still single-admin bootstrap)
+- Public npm registry publishing — Gitea registry only
-- Reworking `mosaic uninstall` (M01 of the parent mission — stable)
+- Voice / video agent interaction
+- Full OpenClaw feature parity — inspiration only
+- Calendar / GLPI / Woodpecker tooling integrations (deferred to post-MVP)
+
+## Session History
+
+For sessions 1–14 (phase-based execution, 2026-03-13 → 2026-03-15), see [scratchpads/mvp-20260312.md](./scratchpads/mvp-20260312.md). Sessions below are tracked at the rollup level.
+
+| Session | Date       | Runtime | Outcome                                                                                                                                                                                                                                                                |
+| ------- | ---------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| S15     | 2026-04-19 | claude  | MVP rollup manifest authored. Install-ux-v2 archived (IUV-M03 retroactively closed — shipped via PR #446 + releases 0.0.27 → 0.0.29). Federation v1 planning landed via PR #468. W1 manifest reachable at `docs/federation/MISSION-MANIFEST.md`. Next: kickoff FED-M1. |
+
+## Next Step
+
+Begin W1 / FED-M1 — federated tier infrastructure. Task breakdown lives at [docs/federation/TASKS.md](./federation/TASKS.md).

docs/PRD.md

@@ -64,6 +64,7 @@ Jarvis (v0.2.0) is a self-hosted AI assistant with a Python FastAPI backend and
 21. `@mosaicstack/cli` — unified `mosaic` CLI
 22. Docker Compose deployment + bare-metal capability
 23. Agent log service — ingest, parse, tier, summarize agent interaction logs
+24. Local durable agent fleet canary — `mosaic fleet` / `mosaic agent` CLI for an isolated tmux-backed canary fleet using a named socket, with roster-driven local customization and rollback-safe verification
 
 ### Out of Scope (v0.1.0)
 
@@ -78,6 +79,102 @@ Jarvis (v0.2.0) is a self-hosted AI assistant with a Python FastAPI backend and
 
 ---
 
+## Tess Interaction Agent Workstream (TESS)
+
+### Problem and Objective
+
+Jason needs one durable, operator-facing Mosaic agent outside Hermes that is reachable through a dedicated Discord channel and CLI, can attach to and operate the Mosaic fleet and transitional Hermes agents, and preserves context across restarts and compaction. Mos remains the coding/general fleet orchestrator; Tess is the complementary human interaction, visibility, control, and migration agent.
+
+The objective is to ship **Tess** (from _tessera_, a piece of a mosaic) as a Pi-native, GPT-5.6 Sol agent with high reasoning. Tess must use Mosaic-owned contracts and plugins so Hermes can be replaced incrementally rather than becoming a permanent architectural dependency.
+
+### Scope
+
+#### In Scope
+
+1. `TESS-ARP-001`: A runtime-neutral `AgentRuntimeProvider` contract supporting `listSessions`, `streamSession`, `sendMessage`, `terminate`, `getSessionTree`, `attach`, health, capability discovery, and normalized events/errors.
+2. `TESS-PI-001`: A long-running Pi-native Tess agent profile/service pinned to GPT-5.6 Sol with high reasoning, explicit tool policy, lifecycle hooks, durable checkpoints, and restart recovery.
+3. `TESS-DSC-001`: Dedicated Discord channel binding to Tess through the Mosaic gateway, with allowlists/RBAC, thread/reply policy, streaming, attachments, approvals, and correlation IDs.
+4. `TESS-CLI-001`: `mosaic tess` CLI commands for chat, status, session listing, attach/detach, send/steer/stop, provider health, and recovery.
+5. `TESS-FLT-001`: Fleet plugin capabilities for roster/status/heartbeat inspection, message delivery, session hierarchy, safe attach, and controlled restart/recovery.
+6. `TESS-MOS-001`: Explicit Mos coordination boundary and tools: hand off orchestration requests, observe mission/task state, receive results, and never silently compete for orchestration authority.
+7. `TESS-HRM-001`: Transitional Hermes adapter for profiles/agents, sessions, streaming/messages, Kanban, skills, memory, tools, cron, and health, using capability negotiation and fail-closed unsupported operations.
+8. `TESS-MEM-001`: Unified memory/retrieval plugin with scoped search/recent/capture/stats, startup context injection, provenance, redaction, namespace isolation, and flat-file/project truth precedence.
+9. `TESS-STA-001`: Durable agent state, inbox, handoff, compaction-recovery, and resume reconstruction.
+10. `TESS-PLG-001`: Plugin/tool catalog covering runtime bootstrap, repository/PR workflow, fleet diagnostics, incident-safe read operations, Discord interaction, and extensible MCP/skill discovery.
+11. `TESS-TRN-001`: Replaceable transport providers: tmux/fleet now, Matrix/native Mosaic transport later, with no Discord/CLI business logic coupled to transport details.
+12. `TESS-SEC-001`: RBAC, per-operation authorization, explicit approval for destructive/privileged/customer-visible actions, audit events, secret/PII redaction, tenant isolation, and bounded command execution.
+13. `TESS-SEC-002`: Command execution SHALL enforce declared scope/role server-side; admin/system and destructive operations SHALL require policy-bound durable approval.
+14. `TESS-SEC-003`: Every session list/read/attach/send/terminate operation SHALL enforce server-derived owner and tenant scope; guessed or client-supplied IDs SHALL grant no authority.
+15. `TESS-SEC-004`: MCP tools SHALL derive actor/tenant from authenticated context and SHALL NOT accept caller-controlled identity fields.
+16. `TESS-SEC-005`: Discord plugin ingress SHALL authenticate service identity, enforce guild/channel/user allowlists, propagate correlation/message IDs, and reject replay.
+17. `TESS-SEC-006`: Secret/PII classification and redaction SHALL occur before persistence and before channel egress, including tool metadata and authentication flows.
+18. `TESS-SEC-007`: Approvals SHALL be one-time, expiring, actor/tenant-bound, and cryptographically bound to the exact structured action digest.
+19. `TESS-SEC-008`: Ingress, provider sends, tool side effects, and responses SHALL use durable inbox/outbox/checkpoints and idempotency records for restart-safe replay.
+20. `TESS-SEC-009`: Garbage collection and retention SHALL be session/tenant scoped unless executed as a separately authorized and audited system-wide job.
+21. `TESS-OBS-001`: Structured logs, traces, health/readiness, provider latency/errors, session lifecycle, tool audit, and actionable recovery diagnostics.
+22. `TESS-MIG-001`: Capability inventory and staged Hermes-to-Mosaic migration matrix with coexistence, cutover, rollback, and deprecation gates.
+
+#### Out of Scope
+
+1. Replacing Mos as coding/general fleet orchestrator.
+2. Making Hermes the Mosaic core or coupling Mosaic domain logic to Hermes schemas.
+3. Migrating every historical chat verbatim; only policy-compliant indexed summaries and user-selected sessions are migrated.
+4. Unrestricted shell execution from Discord.
+5. Full web UI parity in the first Tess operational milestone; gateway contracts must remain web-consumable.
+6. Replacing tmux before Matrix/native transport reaches operational parity.
+
+### Stakeholder and User Requirements
+
+- Jason must be able to converse with the same Tess session from Discord and CLI.
+- Jason must be able to see what is running, stale, blocked, or unhealthy without attaching manually to every session.
+- Jason must be able to attach to Tess and authorized fleet sessions through supported CLI controls.
+- Tess must collaborate with Mos and the fleet while preserving a single clear orchestration authority.
+- The system must migrate useful Hermes/OpenClaw capabilities intentionally, with evidence, instead of copying implementations wholesale.
+
+### Non-Functional Requirements
+
+1. **Security:** default-deny provider/tool capabilities, least privilege, no secrets in logs/prompts/commits, Discord user/channel authorization, and auditable approvals.
+2. **Reliability:** durable inbox/checkpoints; idempotent message handling; reconnect with bounded backoff; no message loss or duplicate execution across gateway restart.
+3. **Performance:** first acknowledgement within 2 seconds when connected; streamed agent output begins within 5 seconds excluding model/provider delay; status reads return within 2 seconds under nominal local conditions.
+4. **Observability:** every ingress message and resulting provider/tool operation carries a correlation ID across Discord, gateway, Tess, provider, and audit events.
+5. **Maintainability:** channel, runtime, transport, memory, and external-agent integrations remain adapter-based with contract tests.
+6. **Privacy:** only scoped context enters external runtimes; persisted messages/memories follow retention and redaction policy.
+7. **Portability:** Tess runs through Pi/Mosaic contracts and does not require Hermes to start or serve native Mosaic operations.
+
+### Acceptance Criteria
+
+1. `AC-TESS-01`: A dedicated Discord channel and `mosaic tess chat` connect to one durable Tess session and stream responses bidirectionally.
+2. `AC-TESS-02`: `mosaic tess status|sessions|tree|attach|send|stop` operate against authorized provider capabilities with stable typed outputs and actionable errors.
+3. `AC-TESS-03`: Tess runs GPT-5.6 Sol at high reasoning and its effective runtime/model/tool policy is visible through status without exposing credentials.
+4. `AC-TESS-04`: Tess can inspect and message the Mosaic fleet, hand orchestration work to Mos, and demonstrate that Tess does not independently claim Mos-owned orchestration work.
+5. `AC-TESS-05`: Hermes adapter demonstrates session listing, streaming/message delivery, hierarchy mapping, and at least one approved capability in each of Kanban, skills, memory, tools, and cron—or reports unsupported capabilities fail-closed.
+6. `AC-TESS-06`: Restart/compaction test preserves session identity, pending inbox, last durable checkpoint, and a resumable handoff without duplicate side effects.
+7. `AC-TESS-07`: Unauthorized Discord users/channels, cross-tenant access, unsafe tool calls, forged approvals, and sensitive-output cases are denied and audited.
+8. `AC-TESS-08`: tmux/fleet and Matrix/native transport implementations pass the same provider contract suite; Matrix may remain non-default until readiness gates pass.
+9. `AC-TESS-09`: Baseline quality gates, unit/integration/contract tests, Discord+CLI E2E, restart/recovery tests, independent code review, and security review are green.
+10. `AC-TESS-10`: Migration matrix documents every audited Hermes/OpenClaw capability as native, adapted, deferred, or rejected, with cutover and rollback evidence.
+11. `AC-TESS-11`: User, admin, developer, API/OpenAPI, operations/recovery, and plugin-authoring documentation is current and linked from the sitemap.
+
+### Constraints, Dependencies, Risks, and Assumptions
+
+- Dependency: Mosaic gateway remains the single API surface; Pi is the native runtime; Valkey/PostgreSQL provide canonical durable state where required.
+- Dependency: Discord bot credentials and dedicated channel ID are deployment secrets provisioned outside source control.
+- Risk: Tess could drift into a second orchestrator. Mitigation: explicit role policy, Mos handoff contract, authority checks, and E2E boundary tests.
+- Risk: broad Hermes compatibility can freeze legacy semantics into Mosaic. Mitigation: Mosaic-owned normalized contracts and capability negotiation.
+- Risk: Discord creates a privileged remote-control surface. Mitigation: pairing/allowlists, RBAC, approvals, rate limits, audit, and safe tool classes.
+- Risk: transcript ingestion can violate privacy or overload memory. Mitigation: scoped opt-in import, redacted summaries, provenance, retention, and deduplication.
+- Risk: current root filesystem has limited headroom. Mitigation: isolated worktrees, no duplicated dependency installation unless required, and cleanup only after active-lane verification.
+- `ASSUMPTION:` The public name is **Tess**, because the user requested a name and the tessera/Mosaic relationship is distinctive; config must permit later display-name changes without renaming APIs or storage keys.
+- `ASSUMPTION:` The dedicated Discord channel ID and final guild policy will be supplied/provisioned during deployment, so implementation uses explicit configuration and fail-fast startup validation.
+- `ASSUMPTION:` tmux/fleet is the production transport for the first operational milestone; Matrix/native transport is implemented behind the same contract and promoted only after parity/reliability verification.
+- `ASSUMPTION:` Project/task truth remains in canonical Mosaic/project stores; semantic memory systems are retrieval/mirror layers, not hidden authorities.
+
+### Testing and Delivery Intent
+
+Delivery uses five gated milestones: runtime contracts/security; Pi service/state; Discord/CLI; fleet/Hermes/plugin suite; migration/Matrix/recovery/qualification. Every source-code task requires tests, independent review, a PR to `main`, terminal-green CI, and issue/task closure. Production activation additionally requires a clean-host Pi launch, dedicated Discord channel smoke test, CLI attach test, restart/recovery drill, and rollback procedure.
+
+---
+
 ## Architecture
 
 ### High-Level System Diagram