test(fleet): hermetic heartbeat tests — temp run-dir + no leaked sidecars

Tests 3, 4, 5 previously returned synthetic pane PIDs (99999/99998/99997)
from their fake list-panes shims but did not set MOSAIC_HEARTBEAT_RUN_DIR,
causing the launcher to fall back to the real ~/.config/mosaic/fleet/run
and potentially spawn a background sidecar against an arbitrary host PID.

Fix:
- list-panes in tests 3/4/5 now returns empty string → PANE_PID stays
  unset → no sidecar is spawned for tests where heartbeat is not under test.
- MOSAIC_HEARTBEAT_RUN_DIR is exported to a per-test mktemp dir in each
  fake-tmux test (3, 4, 5) as defence-in-depth so even if the sidecar
  code path changes, it can never write to the real fleet run dir.
- New temp dirs are registered in CLEANUP_DIRS so they are removed by the
  existing EXIT trap.
- Tests 6 and 7 (the dedicated heartbeat tests) are unchanged: test 6 uses
  a real tmux pane PID + its own HB_RUN_DIR, test 7 intercepts via a fake
  setsid shim that captures args and exits immediately.
- All 7 tests pass; verify-sanitized.sh passes; no stray sidecar processes
  or unexpected .hb files are written to ~/.config/mosaic/fleet/run.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi

docs/fleet/PRD-fleet-suite.md

@@ -1,105 +0,0 @@
-# PRD — Mosaic Fleet Suite (init, configure, operate)
-
-> **Workstream:** W-FLEET (Fleet) under mission `mvp-20260312` · **Phase:** 3→4 productization
-> **North star:** [docs/fleet/north-star.md](./north-star.md) · prior: Phase-2 observability (#579), durable launch (#581), real-agent enablement (#583/#584/#586), releases 0.0.35–0.0.37
-> **Lead:** Jarvis @ `w-jarvis`. **Collaborator:** coder agent @ `dragon-lin` (jwoltje@10.1.10.37:coder0-0).
-> Owner of this file: Fleet workstream lead. Does not modify MVP single-writer control-plane files.
-
-## Mission
-
-Turn the proven fleet primitives into a **user-installable, AI-free-configurable fleet product**:
-a user runs `mosaic fleet init`, answers a few questions (general / coding / research / hybrid),
-gets a recommended set of agents plus one always-on orchestrator wired for chat-ops, and can
-operate, mutate, re-create, and observe the fleet — over tmux today and Matrix tomorrow — from
-CLI/TUI and (designed-for) the webUI.
-
-**Immediate tangible goal:** the **"Mos"** orchestrator agent running on `w-jarvis`, reachable
-in **Discord channel `1517622518662434996`** (server `1112631390438166618`). Once the fleet is
-functional, we use the fleet itself to continue the work.
-
-## Requirements
-
-### A. Configure-without-AI CLI
-| ID | Requirement |
-|---|---|
-| R1 | `mosaic fleet` command set is functional end-to-end (init/install/start/stop/status/ps/verify + agent verbs). |
-| R2 | `mosaic fleet init` is an interactive, **AI-free** CLI wizard. |
-| R3 | Init asks the **configuration type**: `general`, `coding`, `research`, `hybrid`, … (extensible). |
-| R4 | Based on the answer, the fleet is populated with a **recommended set of agents** (a preset). |
-| R5 | **Exactly one main orchestrator agent** is always configured, regardless of type. |
-| R10 | A set of **recommended configurations (presets)** ships for easy duplication. |
-| R8 | User can **re-create** the fleet when config needs change (idempotent re-init / reconfigure). |
-| R17 | Fleet controls are **simple and intuitive**. |
-
-### B. Comms & orchestrator chat-ops
-| ID | Requirement |
-|---|---|
-| R6 | Init can wire the orchestrator to a chat connector — **Telegram / Discord / Matrix / Slack** — for command + comms. |
-| R7 | Designed with the end-goal of **Matrix comms on a locally-controlled server**. |
-| R16 | Fleet supports **tmux AND Matrix** comms, **user-configurable** at init or any time. Not all users want Matrix. |
-| R19 | **"Mos" orchestrator on Discord** (`chan 1517622518662434996` / `srv 1112631390438166618`) on `w-jarvis` — the first live target. |
-
-### C. Runtime, health, lifecycle
-| ID | Requirement |
-|---|---|
-| R9 | Fleet is **mutable by the orchestrator agent** — add/remove agents per need. |
-| R13 | Fleet **gracefully handles Pi + Claude harness updates** — keep harnesses current. |
-| R14 | The **Pi harness is customized** for proper tool usage, etc. |
-| R15 | **Agent heartbeat** properly configured for **Claude AND GPT/Pi** agents. |
-
-### D. Surfaces, testing, docs
-| ID | Requirement |
-|---|---|
-| R18 | Fleet built so the **webUI can view / monitor / terminate / butt-in** on a session. |
-| R11 | Installed and **tested on both `w-jarvis` and `dragon-lin`**. |
-| R12 | **Documentation**: how to install, configure, and use the fleet. |
-
-## Architecture / approach
-
-- **Config model:** `roster.yaml` is the source of truth (already exists). Add **presets** (`general`/`coding`/`research`/`hybrid`) as shipped example rosters; `init` selects a preset, always injects the orchestrator, and writes the roster. Re-init = regenerate roster (preserve user/site overrides — mirrors install env-merge from #567).
-- **Orchestrator agent:** always present; carries the chat connector config (connector type + target IDs) so it can be commanded over chat. tmux is the substrate; the connector bridges chat ↔ the orchestrator session.
-- **Comms layers (R16):** (1) **tmux** inter-agent (`agent-send`, proven) — default, always available. (2) **chat connector** for human↔orchestrator (Discord now; Matrix the strategic target). (3) **Matrix** as the locally-controlled cross-agent bus (future). Connector is pluggable + reconfigurable.
-- **Heartbeat (R15):** runtime-agnostic launcher sidecar already covers pi/claude/codex (#584). Refine per-runtime (native HB) with the **custom Pi harness** (R14) + a Claude path.
-- **Updates (R13):** `mosaic update` (CLI) + a fleet-aware harness-update step that refreshes pi/claude/codex and re-launches agents safely (drain → update → relaunch via the durable launcher).
-- **webUI (R18):** the fleet exposes machine-readable state (`fleet ps --json` already carries tenant/host/heartbeat/managed) + control verbs (start/stop/watch/send); webUI consumes these (control plane rides federation per north star). Ensure a stable JSON contract + a terminate/attach(butt-in) path.
-
-## Phases (incremental, each shippable)
-
-| Phase | Deliverable | Notes |
-|---|---|---|
-| **F1 Presets + init wizard** | preset rosters (general/coding/research/hybrid) + always-orchestrator + AI-free `fleet init` selecting a preset; re-init idempotent | R1–R5, R8, R10, R17 |
-| **F2 Connector + Mos-on-Discord** | orchestrator chat-connector config (Discord first) + **Mos live on Discord `1517…`/`1112…`** on w-jarvis | R6, R19, partial R16 |
-| **F3 Heartbeat + harness** | HB confirmed for claude + pi/gpt; **custom Pi harness** (tool usage, native HB, model self-report); graceful harness updates | R13, R14, R15 |
-| **F4 Matrix + comms toggle** | Matrix connector (local server) + user toggle tmux/Matrix at init/anytime | R7, R16 |
-| **F5 Orchestrator-mutable fleet** | orchestrator can add/remove agents at runtime | R9 |
-| **F6 webUI hooks** | stable JSON contract + terminate/attach surface for webUI view/monitor/terminate/butt-in | R18 |
-| **F7 Test + docs** | install+test on w-jarvis AND dragon-lin; user docs (install/configure/use) | R11, R12 (runs alongside every phase) |
-
-## Work division (proposed — confirm with dragon-lin)
-
-- **Jarvis @ w-jarvis (Lead):** F1 presets+wizard, F2 connector+Mos-on-Discord, F5 mutability, F6 webUI hooks; merge authority + dual-engine reviews; co-testing on w-jarvis.
-- **coder @ dragon-lin:** F3 custom Pi harness + harness-update flow (pi/codex-savvy); plus its in-flight constitution P4–P6 (P4 installer rework underpins `fleet init`/updates — coordinate the install path). Co-testing on dragon-lin (R11).
-- **Shared:** F4 Matrix (whoever has bandwidth); F7 testing/docs continuous.
-
-## Immediate target: Mos on Discord (F2 first slice)
-
-The discord plugin is available (`~/.claude.json`). Path: configure the **orchestrator** as a durable
-fleet session running Claude Code with the discord plugin bridged to channel `1517622518662434996`
-(server `1112631390438166618`) on w-jarvis, with the existing Discord Bridge Protocol (ack within
-~3s, reply via `mcp__discord__reply`, no `AskUserQuestion`). Heartbeat via the launcher sidecar.
-
-## Success criteria
-
-- A non-AI user can `mosaic fleet init`, pick a type, and get a working fleet + orchestrator.
-- **Mos answers in Discord `1517…`** on w-jarvis.
-- Fleet runs + is observable (`fleet ps`) on **both** w-jarvis and dragon-lin.
-- Harness updates handled gracefully; HB healthy for claude + pi/gpt agents.
-- Docs let a new operator install/configure/use the fleet.
-- Re-init + orchestrator mutation work.
-
-## Assumptions (veto-able)
-
-- `ASSUMPTION:` presets ship as example rosters under the framework (`fleet/examples/*.yaml`), selected by `init`.
-- `ASSUMPTION:` chat connectors are pluggable; Discord first (target exists), Matrix is the strategic default later.
-- `ASSUMPTION:` "Mos" = a Claude Code orchestrator session with the discord plugin (reuses the documented Discord Bridge Protocol).
-- `ASSUMPTION:` per north star, runtimes default to Codex/pi-on-Codex for workers; the orchestrator "Mos" runs Claude Code (in Claude Code, which is allowed).

packages/mosaic/framework/fleet/examples/coding.yaml

@@ -1,32 +0,0 @@
-version: 1
-transport: tmux
-tmux:
-  socket_name: mosaic-factory
-  holder_session: _holder
-defaults:
-  working_directory: ~
-runtimes:
-  claude:
-    reset_command: /clear
-  pi:
-    reset_command: /new
-agents:
-  - name: orchestrator
-    runtime: claude
-    class: orchestrator
-    persistent_persona: true
-  - name: coder0
-    runtime: pi
-    class: implementer
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true
-  - name: coder1
-    runtime: pi
-    class: implementer
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true
-  - name: reviewer
-    runtime: pi
-    class: reviewer
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true

packages/mosaic/framework/fleet/examples/general.yaml

@@ -1,22 +0,0 @@
-version: 1
-transport: tmux
-tmux:
-  socket_name: mosaic-factory
-  holder_session: _holder
-defaults:
-  working_directory: ~
-runtimes:
-  claude:
-    reset_command: /clear
-  pi:
-    reset_command: /new
-agents:
-  - name: orchestrator
-    runtime: claude
-    class: orchestrator
-    persistent_persona: true
-  - name: generalist
-    runtime: pi
-    class: worker
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true

packages/mosaic/framework/fleet/examples/hybrid.yaml

@@ -1,32 +0,0 @@
-version: 1
-transport: tmux
-tmux:
-  socket_name: mosaic-factory
-  holder_session: _holder
-defaults:
-  working_directory: ~
-runtimes:
-  claude:
-    reset_command: /clear
-  pi:
-    reset_command: /new
-agents:
-  - name: orchestrator
-    runtime: claude
-    class: orchestrator
-    persistent_persona: true
-  - name: coder0
-    runtime: pi
-    class: implementer
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true
-  - name: researcher0
-    runtime: pi
-    class: researcher
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true
-  - name: reviewer
-    runtime: pi
-    class: reviewer
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true

packages/mosaic/framework/fleet/examples/research.yaml

@@ -1,32 +0,0 @@
-version: 1
-transport: tmux
-tmux:
-  socket_name: mosaic-factory
-  holder_session: _holder
-defaults:
-  working_directory: ~
-runtimes:
-  claude:
-    reset_command: /clear
-  pi:
-    reset_command: /new
-agents:
-  - name: orchestrator
-    runtime: claude
-    class: orchestrator
-    persistent_persona: true
-  - name: researcher0
-    runtime: pi
-    class: researcher
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true
-  - name: researcher1
-    runtime: pi
-    class: researcher
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true
-  - name: analyst
-    runtime: pi
-    class: analyst
-    model_hint: openai-codex/gpt-5.5:high
-    reset_between_tasks: true

packages/mosaic/framework/install.sh

@@ -19,23 +19,13 @@ SOURCE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 TARGET_DIR="${MOSAIC_HOME:-$HOME/.config/mosaic}"
 INSTALL_MODE="${MOSAIC_INSTALL_MODE:-prompt}"
 
-# Files/dirs protected from rsync --delete during sync. NOTE: framework-owned
-# entries (CONSTITUTION/AGENTS/STANDARDS) ARE re-applied afterward by
-# reconcile_framework_files (overwrite + backup-once); the rest stay user-owned.
+# Files/dirs preserved across upgrades (never overwritten).
 # User-created content in these paths survives rsync --delete.
-PRESERVE_PATHS=("CONSTITUTION.md" "AGENTS.md" "SOUL.md" "USER.md" "TOOLS.md" "STANDARDS.md" "memory" "sources" "credentials")
-
-# Framework-owned contract files: re-copied from defaults/ on every upgrade (the
-# user must not edit them; a divergent copy is backed up once before overwrite).
-# USER_SEEDED files are written once on first install, then owned by the user.
-# Both lists are APPEND-FRIENDLY — add a new shipped framework file here and to the
-# matching list in packages/mosaic/src/config/file-adapter.ts.
-FRAMEWORK_OWNED=("CONSTITUTION.md" "AGENTS.md" "STANDARDS.md")
-USER_SEEDED=("TOOLS.md")
+PRESERVE_PATHS=("AGENTS.md" "SOUL.md" "USER.md" "TOOLS.md" "STANDARDS.md" "memory" "sources" "credentials")
 
 # Current framework schema version — bump this when the layout changes.
 # The migration system uses this to run upgrade steps.
-FRAMEWORK_VERSION=3
+FRAMEWORK_VERSION=2
 
 # ─── colours ──────────────────────────────────────────────────────────────────
 if [[ -t 1 ]]; then
@@ -50,47 +40,6 @@ warn() { echo -e "  ${YELLOW}⚠${RESET} $1" >&2; }
 fail() { echo -e "  ${RED}✗${RESET} $1" >&2; }
 step() { echo -e "\n${BOLD}$1${RESET}"; }
 
-# ─── snapshot / restore (crash safety for upgrades) ──────────────────────────
-SNAPSHOT_DIR=""
-make_snapshot() {
-  is_existing_install || return 0
-  SNAPSHOT_DIR="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-snapshot-XXXXXX")"
-  cp -a "$TARGET_DIR/." "$SNAPSHOT_DIR/" 2>/dev/null || true
-}
-restore_snapshot() {
-  [[ -n "$SNAPSHOT_DIR" && -d "$SNAPSHOT_DIR" ]] || return 0
-  fail "Install interrupted/failed — restoring previous state from snapshot"
-  rm -rf "$TARGET_DIR"; mkdir -p "$TARGET_DIR"
-  cp -a "$SNAPSHOT_DIR/." "$TARGET_DIR/" 2>/dev/null || true
-}
-cleanup_snapshot() { [[ -n "$SNAPSHOT_DIR" && -d "$SNAPSHOT_DIR" ]] && rm -rf "$SNAPSHOT_DIR"; SNAPSHOT_DIR=""; }
-
-# Reconcile contract files after sync: framework-owned overwrite (backup-once),
-# user-seeded seed-if-absent.
-reconcile_framework_files() {
-  local defaults="$TARGET_DIR/defaults" f
-  [[ -d "$defaults" ]] || return 0
-  for f in "${FRAMEWORK_OWNED[@]}"; do
-    [[ -f "$defaults/$f" ]] || continue
-    # Already current — skip to avoid mtime churn.
-    if [[ -f "$TARGET_DIR/$f" ]] && cmp -s "$TARGET_DIR/$f" "$defaults/$f"; then
-      continue
-    fi
-    if [[ -f "$TARGET_DIR/$f" && ! -f "$TARGET_DIR/${f}.pre-constitution.bak" ]]; then
-      cp "$TARGET_DIR/$f" "$TARGET_DIR/${f}.pre-constitution.bak"
-      warn "$f is now framework-owned and was updated; your previous copy is saved as ${f}.pre-constitution.bak — re-apply intended changes as a .local overlay or policy/ file (see CONSTITUTION.md / constitution/LAYER-MODEL.md)."
-    fi
-    cp "$defaults/$f" "$TARGET_DIR/$f"
-  done
-  for f in "${USER_SEEDED[@]}"; do
-    [[ -f "$defaults/$f" ]] || continue
-    if [[ ! -f "$TARGET_DIR/$f" ]]; then
-      cp "$defaults/$f" "$TARGET_DIR/$f"
-      ok "Seeded $f from defaults"
-    fi
-  done
-}
-
 # ─── helpers ──────────────────────────────────────────────────────────────────
 
 is_existing_install() {
@@ -164,14 +113,11 @@ sync_framework() {
   fi
 
   if command -v rsync >/dev/null 2>&1; then
-    local rsync_args=(-a --delete --exclude ".git" --exclude ".framework-version" --exclude "*.pre-constitution.bak")
+    local rsync_args=(-a --delete --exclude ".git" --exclude ".framework-version")
 
     if [[ "$INSTALL_MODE" == "keep" ]]; then
-      # Anchor to the transfer root (leading /) so we preserve the TOP-LEVEL
-      # ~/.config/mosaic/<file> without also excluding defaults/<file> from sync
-      # (reconcile_framework_files needs the freshly-synced defaults/ copies).
       for path in "${PRESERVE_PATHS[@]}"; do
-        rsync_args+=(--exclude "/$path")
+        rsync_args+=(--exclude "$path")
       done
     fi
 
@@ -191,7 +137,7 @@ sync_framework() {
     done
   fi
 
-  find "$TARGET_DIR" -mindepth 1 -maxdepth 1 ! -name ".git" ! -name ".framework-version" ! -name "*.pre-constitution.bak" -exec rm -rf {} +
+  find "$TARGET_DIR" -mindepth 1 -maxdepth 1 ! -name ".git" ! -name ".framework-version" -exec rm -rf {} +
   cp -R "$SOURCE_DIR"/. "$TARGET_DIR"/
   rm -rf "$TARGET_DIR/.git"
 
@@ -249,15 +195,10 @@ run_migrations() {
     fi
   fi
 
-  # ── Migration: v2 → v3 (Constitution split) ───────────────────────────────
-  # CONSTITUTION.md / AGENTS.md / STANDARDS.md become framework-owned (overwritten
-  # on upgrade). reconcile_framework_files() has already run before this point: it
-  # backed up any user-edited copy to <file>.pre-constitution.bak and installed the
-  # new framework version. Nothing further to do here — the advisory was emitted at
-  # reconcile time. (STANDARDS.local.md composition lands with the overlay composer.)
-  if [[ "$from_version" -lt 3 ]]; then
-    ok "Migrated to the Constitution layout (framework-owned CONSTITUTION/AGENTS/STANDARDS)"
-  fi
+  # ── Future migrations go here ──────────────────────────────────────────────
+  # if [[ "$from_version" -lt 3 ]]; then
+  #   ...
+  # fi
 }
 
 # ═══════════════════════════════════════════════════════════════════════════════
@@ -275,25 +216,29 @@ else
   ok "Install mode: overwrite"
 fi
 
-# Snapshot before any destructive file operation; restore on interrupt/failure.
-make_snapshot
-trap 'restore_snapshot' ERR INT TERM
-
 sync_framework
 
 # Ensure persistent directories exist
 mkdir -p "$TARGET_DIR/memory"
 mkdir -p "$TARGET_DIR/credentials"
 
-# Reconcile contract files from defaults/ into the framework root: framework-owned
-# files (CONSTITUTION/AGENTS/STANDARDS) are overwritten every upgrade (a divergent
-# copy is backed up once); user-seeded files (TOOLS) are written on first install only.
+# Seed defaults — copy framework contract files from defaults/ to framework
+# root if not already present. These ship with sensible defaults but must
+# never be overwritten once the user has customized them.
 #
 # This list must match the framework-contract whitelist in
 # packages/mosaic/src/config/file-adapter.ts (FileConfigAdapter.syncFramework).
 # SOUL.md and USER.md are intentionally NOT seeded here — they are generated
 # by `mosaic init` from templates with user-supplied values.
-reconcile_framework_files
+DEFAULTS_DIR="$TARGET_DIR/defaults"
+if [[ -d "$DEFAULTS_DIR" ]]; then
+  for default_file in CONSTITUTION.md AGENTS.md STANDARDS.md TOOLS.md; do
+    if [[ -f "$DEFAULTS_DIR/$default_file" ]] && [[ ! -f "$TARGET_DIR/$default_file" ]]; then
+      cp "$DEFAULTS_DIR/$default_file" "$TARGET_DIR/$default_file"
+      ok "Seeded $default_file from defaults"
+    fi
+  done
+fi
 
 # Ensure tool scripts are executable
 find "$TARGET_DIR/tools" -name "*.sh" -exec chmod +x {} + 2>/dev/null || true
@@ -304,18 +249,6 @@ ok "Framework synced to $TARGET_DIR"
 # Run migrations before post-install (migrations may remove old bin/ etc.)
 run_migrations
 
-# File-system phase complete and consistent — clear the restore trap.
-trap - ERR INT TERM
-cleanup_snapshot
-
-# Testability / minimal-install hook: stop after the file-system phase, before any
-# environment-touching post-install steps (runtime linking, MCP setup, skills, doctor).
-if [[ "${MOSAIC_SYNC_ONLY:-0}" == "1" ]]; then
-  write_framework_version
-  ok "Sync-only mode: file phase complete"
-  exit 0
-fi
-
 step "Post-install tasks"
 
 SCRIPTS="$TARGET_DIR/tools/_scripts"

packages/mosaic/framework/runtime/pi/mosaic-extension.ts

@@ -9,16 +9,8 @@
  *   4. Memory routing — remind agent to use ~/.config/mosaic/memory/
  */
 
-import type { ExtensionAPI, ExtensionContext } from '@earendil-works/pi-coding-agent';
-import { Type } from 'typebox';
-import {
-  existsSync,
-  readFileSync,
-  writeFileSync,
-  unlinkSync,
-  mkdirSync,
-  renameSync,
-} from 'node:fs';
+import type { ExtensionAPI } from '@mariozechner/pi-coding-agent';
+import { existsSync, readFileSync, writeFileSync, unlinkSync, mkdirSync } from 'node:fs';
 import { join, basename } from 'node:path';
 import { homedir } from 'node:os';
 import { execSync, spawnSync } from 'node:child_process';
@@ -33,57 +25,6 @@ const MOSAIC_HOME = process.env['MOSAIC_HOME'] ?? join(homedir(), '.config', 'mo
 // Helpers
 // ---------------------------------------------------------------------------
 
-// ---------------------------------------------------------------------------
-// Native heartbeat (fleet R14/R15)
-// ---------------------------------------------------------------------------
-// When this agent runs under the Mosaic fleet (MOSAIC_AGENT_NAME set), the
-// extension writes its OWN heartbeat in the same .hb contract `fleet ps` reads
-// (ts/pid/status[/model]) and touches a `.hb.native` precedence marker so the
-// shell sidecar defers. Native HB knows the real turn state (busy/ok), so it is
-// more accurate than the pane-PID-only sidecar fallback.
-const HB_AGENT_NAME = process.env['MOSAIC_AGENT_NAME'] ?? '';
-const HB_RUN_DIR = process.env['MOSAIC_HEARTBEAT_RUN_DIR'] ?? join(MOSAIC_HOME, 'fleet', 'run');
-const HB_INTERVAL_MS = (() => {
-  const s = Number.parseInt(process.env['MOSAIC_HEARTBEAT_INTERVAL'] ?? '', 10);
-  return Number.isFinite(s) && s > 0 ? s * 1000 : 15_000;
-})();
-
-function nativeHbEnabled(): boolean {
-  return HB_AGENT_NAME.length > 0;
-}
-
-function readModelId(ctx: ExtensionContext): string | null {
-  const m = ctx.model as unknown as { id?: string; name?: string } | undefined;
-  return m?.id ?? m?.name ?? null;
-}
-
-function writeNativeHeartbeat(status: 'ok' | 'busy', model: string | null): void {
-  if (!nativeHbEnabled()) return;
-  try {
-    mkdirSync(HB_RUN_DIR, { recursive: true });
-    const hb = join(HB_RUN_DIR, `${HB_AGENT_NAME}.hb`);
-    const lines = [`ts=${nowIso()}`, `pid=${process.pid}`, `status=${status}`];
-    if (model) lines.push(`model=${model}`);
-    const tmp = `${hb}.tmp.${process.pid}`;
-    writeFileSync(tmp, lines.join('\n') + '\n');
-    renameSync(tmp, hb); // atomic replace — fleet ps never reads a partial file
-    // Precedence marker: tells the shell sidecar that native HB is authoritative.
-    writeFileSync(join(HB_RUN_DIR, `${HB_AGENT_NAME}.hb.native`), nowIso() + '\n');
-  } catch {
-    // Best-effort: never let heartbeat I/O disrupt the Pi session.
-  }
-}
-
-function clearNativeMarker(): void {
-  if (!nativeHbEnabled()) return;
-  try {
-    const m = join(HB_RUN_DIR, `${HB_AGENT_NAME}.hb.native`);
-    if (existsSync(m)) unlinkSync(m); // native stopping — let the sidecar take over
-  } catch {
-    /* ignore */
-  }
-}
-
 function safeRead(filePath: string): string | null {
   try {
     return readFileSync(filePath, 'utf-8');
@@ -246,9 +187,6 @@ function buildMissionSummary(cwd: string, mission: ActiveMission): string {
 
 export default function register(pi: ExtensionAPI) {
   let sessionCwd = process.cwd();
-  let hbStatus: 'ok' | 'busy' = 'ok';
-  let hbModel: string | null = null;
-  let hbTimer: ReturnType<typeof setInterval> | null = null;
 
   // ── Session Start ─────────────────────────────────────────────────────
   pi.on('session_start', async (_event, ctx) => {
@@ -269,39 +207,10 @@ export default function register(pi: ExtensionAPI) {
     } else {
       ctx.ui.notify('Mosaic framework loaded', 'info');
     }
-
-    // Native heartbeat: write immediately, then on an interval. Idle = 'ok';
-    // turn_start/turn_end flip the status so `fleet ps` reflects real activity.
-    if (nativeHbEnabled()) {
-      hbModel = readModelId(ctx);
-      writeNativeHeartbeat('ok', hbModel);
-      hbTimer = setInterval(() => writeNativeHeartbeat(hbStatus, hbModel), HB_INTERVAL_MS);
-      if (typeof hbTimer.unref === 'function') hbTimer.unref();
-    }
   });
 
-  // ── Turn lifecycle → accurate busy/ok heartbeat ───────────────────────
-  pi.on('turn_start', async (_event, ctx) => {
-    hbStatus = 'busy';
-    hbModel = readModelId(ctx) ?? hbModel;
-    writeNativeHeartbeat('busy', hbModel);
-  });
-  pi.on('turn_end', async (_event, ctx) => {
-    hbStatus = 'ok';
-    hbModel = readModelId(ctx) ?? hbModel;
-    writeNativeHeartbeat('ok', hbModel);
-  });
-
-  // ── Session Shutdown ──────────────────────────────────────────────────
-  // (The pi API event is 'session_shutdown'; the prior 'session_end' handler
-  // never fired — fixed here so repo hooks + lock cleanup actually run.)
-  pi.on('session_shutdown', async (_event, _ctx) => {
-    if (hbTimer) {
-      clearInterval(hbTimer);
-      hbTimer = null;
-    }
-    clearNativeMarker();
-
+  // ── Session End ───────────────────────────────────────────────────────
+  pi.on('session_end', async (_event, _ctx) => {
     // Run repo session-end hook
     runRepoHook(sessionCwd, 'session-end');
 
@@ -343,32 +252,4 @@ export default function register(pi: ExtensionAPI) {
       }
     },
   });
-
-  // ── Register mosaic_mission_status tool (model-callable) ──────────────
-  // R14 "proper tool usage": give the agent a first-class tool to load its
-  // active Mosaic mission, milestone progress, task counts, and latest
-  // scratchpad — so it self-orients on in-flight work before planning,
-  // instead of shelling out or guessing. Mirrors the /mosaic-status command
-  // but returns the summary as tool output the LLM can read.
-  pi.registerTool({
-    name: 'mosaic_mission_status',
-    label: 'Mosaic Mission Status',
-    description:
-      'Return the active Mosaic mission, milestone progress, task counts, and latest scratchpad for the current project. Returns a note when no mission is active.',
-    promptSnippet: 'Read the active Mosaic mission + task state for the current project',
-    promptGuidelines: [
-      'Use mosaic_mission_status at the start of a session or task to load the active mission, milestone progress, and open tasks before planning work.',
-    ],
-    parameters: Type.Object({}),
-    async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
-      const mission = detectMission(sessionCwd);
-      const text = mission
-        ? buildMissionSummary(sessionCwd, mission)
-        : 'No active Mosaic mission in this project.';
-      return {
-        content: [{ type: 'text', text }],
-        details: mission ? { ...mission } : { active: false },
-      };
-    },
-  });
 }

packages/mosaic/framework/tools/_scripts/mosaic-init

@@ -274,13 +274,6 @@ detect_existing_config
 echo "[mosaic-init] Generating SOUL.md — agent identity contract"
 echo ""
 
-# Fail-closed persona: in non-interactive mode the agent NAME must be supplied
-# explicitly (--name) — never silently ship an agent named "Assistant".
-if [[ $NON_INTERACTIVE -eq 1 && -z "$AGENT_NAME" ]]; then
-  echo "[mosaic-init] ERROR: --name (agent name) is required in non-interactive mode." >&2
-  exit 1
-fi
-
 prompt_if_empty AGENT_NAME "What name should agents use" "Assistant"
 prompt_if_empty ROLE_DESCRIPTION "Agent role description" "execution partner and visibility engine"
 

packages/mosaic/framework/tools/fleet/start-agent-session.sh

@@ -6,7 +6,7 @@ MOSAIC_TMUX_SOCKET=${MOSAIC_TMUX_SOCKET:-mosaic-factory}
 MOSAIC_AGENT_RUNTIME=${MOSAIC_AGENT_RUNTIME:-pi}
 MOSAIC_AGENT_WORKDIR=${MOSAIC_AGENT_WORKDIR:-$HOME}
 MOSAIC_AGENT_COMMAND=${MOSAIC_AGENT_COMMAND:-}
-MOSAIC_HEARTBEAT_RUN_DIR=${MOSAIC_HEARTBEAT_RUN_DIR:-${MOSAIC_HOME:-$HOME/.config/mosaic}/fleet/run}
+MOSAIC_HEARTBEAT_RUN_DIR=${MOSAIC_HEARTBEAT_RUN_DIR:-$HOME/.config/mosaic/fleet/run}
 MOSAIC_HEARTBEAT_INTERVAL=${MOSAIC_HEARTBEAT_INTERVAL:-15}
 
 if [ -z "$AGENT_NAME" ]; then
@@ -90,18 +90,11 @@ MOSAIC_RUNTIME_BIN_PREFIX=$(_build_runtime_bin_prefix)
 #
 # We build the snippet as a double-quoted here-string embedded in a printf call
 # to avoid nested quoting problems.
-#
-# MOSAIC_AGENT_NAME must also be exported INTO the pane: panes inherit the tmux
-# server environment (not this script's, and not the systemd unit's), so the
-# name would otherwise be empty in-pane and the runtime's native heartbeat
-# (which gates on MOSAIC_AGENT_NAME) would never fire. %q-quote it so it is a
-# safe single bash token regardless of the name's characters.
-AGENT_NAME_Q=$(printf '%q' "$AGENT_NAME")
 
 if [ -n "$MOSAIC_RUNTIME_BIN_PREFIX" ]; then
-  PANE_SHELL_SNIPPET="export MOSAIC_AGENT_NAME=${AGENT_NAME_Q}; export PATH=\"${MOSAIC_RUNTIME_BIN_PREFIX}:\${PATH}\"; exec ${MOSAIC_AGENT_COMMAND}"
+  PANE_SHELL_SNIPPET="export PATH=\"${MOSAIC_RUNTIME_BIN_PREFIX}:\${PATH}\"; exec ${MOSAIC_AGENT_COMMAND}"
 else
-  PANE_SHELL_SNIPPET="export MOSAIC_AGENT_NAME=${AGENT_NAME_Q}; exec ${MOSAIC_AGENT_COMMAND}"
+  PANE_SHELL_SNIPPET="exec ${MOSAIC_AGENT_COMMAND}"
 fi
 
 mkdir -p "$MOSAIC_AGENT_WORKDIR"
@@ -136,7 +129,7 @@ _start_heartbeat_sidecar() {
   # references to any variables from this script's environment.
   local sidecar_script
   sidecar_script=$(printf \
-    'hb=%q; pid=%q; iv=%q; mkdir -p "$(dirname "$hb")"; while kill -0 "$pid" 2>/dev/null; do nat="$hb.native"; if [ -f "$nat" ] && [ "$(( $(date +%%s) - $(stat -c %%Y "$nat" 2>/dev/null || echo 0) ))" -lt "$(( iv * 2 ))" ]; then sleep "$iv"; continue; fi; tmp="$hb.tmp.$$"; printf "ts=%%s\npid=%%s\nstatus=ok\n" "$(date +%%Y-%%m-%%dT%%H:%%M:%%S%%z)" "$pid" > "$tmp" && mv "$tmp" "$hb"; sleep "$iv"; done' \
+    'hb=%s; pid=%s; iv=%s; mkdir -p "$(dirname "$hb")"; while kill -0 "$pid" 2>/dev/null; do tmp="$hb.tmp.$$"; printf "ts=%%s\npid=%%s\nstatus=ok\n" "$(date +%%Y-%%m-%%dT%%H:%%M:%%S%%z)" "$pid" > "$tmp" && mv "$tmp" "$hb"; sleep "$iv"; done' \
     "$hb_file" "$pane_pid" "$interval")
 
   # setsid + disown ensures the sidecar survives this script exiting.

packages/mosaic/framework/tools/fleet/test-start-agent-session.sh

@@ -32,15 +32,8 @@ MOSAIC_AGENT_COMMAND='bash --noprofile --norc -i' \
   "$START" "$AGENT"
 
 tmux -L "$SOCKET" has-session -t "=$AGENT:0.0" || fail "agent session was not created"
-# Retry: pane_current_path briefly reflects the tmux server's cwd until the pane
-# process establishes its own cwd (the -c start dir). Poll until it settles.
-actual_dir=""
-for _ in $(seq 1 30); do
-  actual_dir=$(tmux -L "$SOCKET" display-message -p -t "=$AGENT:0.0" '#{pane_current_path}')
-  [ "$actual_dir" = "$WORKDIR" ] && break
-  sleep 0.1
-done
-[ "$actual_dir" = "$WORKDIR" ] || fail "agent workdir mismatch: $actual_dir (expected $WORKDIR)"
+actual_dir=$(tmux -L "$SOCKET" display-message -p -t "=$AGENT:0.0" '#{pane_current_path}')
+[ "$actual_dir" = "$WORKDIR" ] || fail "agent workdir mismatch: $actual_dir"
 
 # ── Test 2: idempotency (duplicate start prints 'already running') ─────────────
 MOSAIC_TMUX_SOCKET="$SOCKET" \

packages/mosaic/framework/tools/quality/scripts/test-install-migration.sh

@@ -1,67 +0,0 @@
-#!/usr/bin/env bash
-# test-install-migration.sh — fixture matrix for the v2→v3 (Constitution) upgrade
-# migration in install.sh. Runs the installer against throwaway MOSAIC_HOME dirs
-# with MOSAIC_SYNC_ONLY=1 (file phase only — no environment-touching post-install)
-# and asserts the framework-owned-overwrite + user-preserve + backup semantics.
-#
-# Mirrors the TS fixture suite in packages/mosaic/src/config/file-adapter.test.ts;
-# both installers MUST behave identically.
-#
-# Usage:  bash test-install-migration.sh
-set -uo pipefail
-
-FW="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"   # packages/mosaic/framework
-INSTALL="$FW/install.sh"
-DEFA="$FW/defaults"
-
-pass=0; fail=0
-chk() { if eval "$2"; then echo "  ✓ $1"; pass=$((pass + 1)); else echo "  ✗ $1"; fail=$((fail + 1)); fi; }
-run() { MOSAIC_HOME="$1" MOSAIC_INSTALL_MODE="$2" MOSAIC_SYNC_ONLY=1 bash "$INSTALL" >/dev/null 2>&1; }
-
-echo "install.sh v2→v3 migration fixture matrix:"
-
-# F1 — fresh install
-T1=$(mktemp -d); run "$T1" overwrite
-chk "F1 fresh: CONSTITUTION/AGENTS/STANDARDS/TOOLS seeded" \
-  "[ -f '$T1/CONSTITUTION.md' ] && [ -f '$T1/AGENTS.md' ] && [ -f '$T1/STANDARDS.md' ] && [ -f '$T1/TOOLS.md' ]"
-chk "F1 fresh: AGENTS == shipped default" "cmp -s '$T1/AGENTS.md' '$DEFA/AGENTS.md'"
-chk "F1 fresh: framework-version stamped 3" "[ \"\$(cat '$T1/.framework-version' 2>/dev/null)\" = 3 ]"
-
-# F2 — legacy install with a user-edited AGENTS.md (the sanctioned pre-constitution customization)
-T2=$(mktemp -d); mkdir -p "$T2/credentials"
-printf '# user-edited AGENTS pre-constitution\n' > "$T2/AGENTS.md"
-printf '# my persona\n' > "$T2/SOUL.md"
-printf 'token\n' > "$T2/credentials/c.json"
-echo 2 > "$T2/.framework-version"
-run "$T2" keep
-chk "F2 legacy-edited: AGENTS overwritten to framework version" "cmp -s '$T2/AGENTS.md' '$DEFA/AGENTS.md'"
-chk "F2 legacy-edited: prior AGENTS saved to .pre-constitution.bak" \
-  "grep -q 'user-edited AGENTS pre-constitution' '$T2/AGENTS.md.pre-constitution.bak'"
-chk "F2 legacy-edited: SOUL.md preserved" "grep -q 'my persona' '$T2/SOUL.md'"
-chk "F2 legacy-edited: credentials preserved" "grep -q token '$T2/credentials/c.json'"
-chk "F2 legacy-edited: CONSTITUTION.md installed" "[ -f '$T2/CONSTITUTION.md' ]"
-run "$T2" keep
-chk "F2 idempotent: .pre-constitution.bak preserved across a 2nd upgrade" \
-  "grep -q 'user-edited AGENTS pre-constitution' '$T2/AGENTS.md.pre-constitution.bak'"
-
-# F3 — user-tuned STANDARDS.md
-T3=$(mktemp -d); printf '# tuned standards\n' > "$T3/STANDARDS.md"; printf '# persona\n' > "$T3/SOUL.md"; echo 2 > "$T3/.framework-version"
-run "$T3" keep
-chk "F3 tuned-standard: STANDARDS overwritten" "cmp -s '$T3/STANDARDS.md' '$DEFA/STANDARDS.md'"
-chk "F3 tuned-standard: tuned copy backed up" "grep -q 'tuned standards' '$T3/STANDARDS.md.pre-constitution.bak'"
-
-# F4 — unattended / no TTY (stdin closed): must complete without hanging, default to keep
-T4=$(mktemp -d); printf '# persona\n' > "$T4/SOUL.md"; printf '# old\n' > "$T4/AGENTS.md"; echo 2 > "$T4/.framework-version"
-MOSAIC_HOME="$T4" MOSAIC_SYNC_ONLY=1 bash "$INSTALL" </dev/null >/dev/null 2>&1
-chk "F4 no-TTY: completed, AGENTS updated" "cmp -s '$T4/AGENTS.md' '$DEFA/AGENTS.md'"
-
-# F5 — failure path must not corrupt existing data (invalid mode rejected before any file op)
-T5=$(mktemp -d); mkdir -p "$T5/credentials"; printf '# orig\n' > "$T5/SOUL.md"; printf 'keepme\n' > "$T5/credentials/c.json"; echo 2 > "$T5/.framework-version"
-MOSAIC_HOME="$T5" MOSAIC_INSTALL_MODE=bogus MOSAIC_SYNC_ONLY=1 bash "$INSTALL" >/dev/null 2>&1; rc=$?
-chk "F5 failure: invalid mode rejected (nonzero exit)" "[ $rc -ne 0 ]"
-chk "F5 failure: SOUL + credentials intact" "grep -q orig '$T5/SOUL.md' && grep -q keepme '$T5/credentials/c.json'"
-
-rm -rf "$T1" "$T2" "$T3" "$T4" "$T5"
-echo
-echo "RESULT: $pass passed, $fail failed"
-[ "$fail" -eq 0 ]

packages/mosaic/framework/tools/quality/scripts/verify-sanitized.sh

@@ -53,15 +53,9 @@ _selftest() {
   local tmp; tmp="$(mktemp -d)" || return 1
   printf 'contact jason.woltje at jarvis-brain (PDA-friendly)\n' > "$tmp/planted.md"
   printf 'X="${VAR:-$HOME/src/whatever/x.json}"\n' > "$tmp/planted.sh"
-  printf 'name: jason-woltje\n' > "$tmp/planted.yaml"
-  printf '[Service]\nUser=jarvis\n' > "$tmp/planted.service"
   local rc=0
   grep -qIEi "$DENYLIST" "$tmp/planted.md" || { echo "✗ SELF-TEST: identity denylist regex broken" >&2; rc=1; }
   grep -qIE  "$STRUCTURAL_SH" "$tmp/planted.sh" || { echo "✗ SELF-TEST: structural regex broken" >&2; rc=1; }
-  # Prove the identity scan covers the config formats it claims to (yaml/service/etc).
-  local n_ext
-  n_ext=$(find "$tmp" -type f \( -name '*.yaml' -o -name '*.service' \) -print0 | xargs -0 -r grep -lIEi "$DENYLIST" 2>/dev/null | wc -l)
-  [[ "$n_ext" -eq 2 ]] || { echo "✗ SELF-TEST: identity scan does not cover .yaml/.service extensions" >&2; rc=1; }
   rm -rf "$tmp"; return $rc
 }
 _selftest || exit 2

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.38",
+  "version": "0.0.35",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",

packages/mosaic/src/commands/fleet.ts

@@ -1,10 +1,9 @@
 import { constants } from 'node:fs';
-import { access, chmod, copyFile, mkdir, readFile, unlink, writeFile } from 'node:fs/promises';
+import { access, chmod, copyFile, mkdir, readFile, writeFile } from 'node:fs/promises';
 import { homedir, hostname, userInfo } from 'node:os';
 import { dirname, join, resolve } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { spawn } from 'node:child_process';
-import * as readline from 'node:readline';
 import type { Command } from 'commander';
 import YAML from 'yaml';
 
@@ -42,11 +41,6 @@ export interface FleetCommandDeps {
   sleepFn?: SleepFn;
   mosaicHome?: string;
   frameworkRoot?: string;
-  /**
-   * Injectable TTY check for `fleet init` wizard. Defaults to process.stdin.isTTY.
-   * Tests stub this to simulate interactive or non-interactive environments.
-   */
-  isStdinTTY?: boolean;
 }
 
 interface RawFleetRoster {
@@ -152,16 +146,13 @@ export function resolveFleetPaths(mosaicHome = defaultMosaicHome()): FleetPaths
 }
 
 function defaultMosaicHome(): string {
-  // Honor MOSAIC_HOME so the reader matches the writer sidecar (and the launcher),
-  // even when MOSAIC_HOME is set in the shell without an explicit --mosaic-home flag.
-  return process.env.MOSAIC_HOME ?? join(homedir(), '.config', 'mosaic');
+  return join(homedir(), '.config', 'mosaic');
 }
 
 function assertDefaultMosaicHomeForSystemd(mosaicHome: string): void {
-  const literalHome = join(homedir(), '.config', 'mosaic');
-  if (resolve(mosaicHome) !== resolve(literalHome)) {
+  if (resolve(mosaicHome) !== resolve(defaultMosaicHome())) {
     throw new Error(
-      `install-systemd only supports the default Mosaic home (${literalHome}) because the user systemd units use %h/.config/mosaic paths.`,
+      `install-systemd only supports the default Mosaic home (${defaultMosaicHome()}) because the user systemd units use %h/.config/mosaic paths.`,
     );
   }
 }
@@ -371,16 +362,6 @@ export function buildAgentTailCommand(
 // ---------------------------------------------------------------------------
 
 export const HEARTBEAT_INTERVAL_MS = 15_000;
-
-/**
- * Heartbeat interval in ms, honoring MOSAIC_HEARTBEAT_INTERVAL (seconds) so the
- * `fleet ps` freshness threshold matches the writer sidecar's actual cadence
- * (start-agent-session.sh). Falls back to HEARTBEAT_INTERVAL_MS (15s).
- */
-export function heartbeatIntervalMs(): number {
-  const sec = Number.parseInt(process.env.MOSAIC_HEARTBEAT_INTERVAL ?? '', 10);
-  return Number.isFinite(sec) && sec > 0 ? sec * 1000 : HEARTBEAT_INTERVAL_MS;
-}
 export const HEARTBEAT_HEALTHY_MULTIPLIER = 3;
 
 export interface HeartbeatInfo {
@@ -390,8 +371,6 @@ export interface HeartbeatInfo {
   /** healthy | stale | unknown */
   health: 'healthy' | 'stale' | 'unknown';
   ageMs: number | null;
-  /** Model id the runtime self-reported in its heartbeat (native HB only), else null. */
-  model: string | null;
 }
 
 export interface AgentPsRow {
@@ -410,10 +389,6 @@ export interface AgentPsRow {
   driftFlag: boolean;
   /** active but UnitFileState=disabled */
   bootEnableWarning: boolean;
-  /** true = came from roster; false = found on socket but not in roster */
-  managed: boolean;
-  /** "roster" = defined in roster.yaml; "socket" = discovered via tmux list-sessions */
-  source: 'roster' | 'socket';
 }
 
 /**
@@ -456,34 +431,11 @@ export function buildTmuxListPanesCommand(
   ];
 }
 
-/**
- * Returns the tmux list-sessions command to enumerate all sessions on a socket.
- * Format: `tmux -L <socket> list-sessions -F '#{session_name}'`
- * Used to discover ad-hoc sessions that are not in the roster.
- */
-export function buildTmuxListSessionsCommand(socketName = DEFAULT_SOCKET_NAME): string[] {
-  return ['tmux', '-L', socketName, 'list-sessions', '-F', '#{session_name}'];
-}
-
-/**
- * Parse the output of `tmux list-sessions -F '#{session_name}'` into an array of session names.
- * Returns an empty array on empty/blank output.
- */
-export function parseTmuxListSessions(output: string): string[] {
-  return output
-    .split('\n')
-    .map((line) => line.trim())
-    .filter((line) => line.length > 0);
-}
-
 /**
  * Returns the heartbeat file path for an agent.
  */
 export function heartbeatPath(agentName: string, mosaicHome = defaultMosaicHome()): string {
-  // Honor MOSAIC_HEARTBEAT_RUN_DIR (the writer sidecar's override); otherwise the
-  // canonical <mosaicHome>/fleet/run. Keeps reader and writer on the same path.
-  const runDir = process.env.MOSAIC_HEARTBEAT_RUN_DIR ?? join(mosaicHome, 'fleet', 'run');
-  return join(runDir, `${agentName}.hb`);
+  return join(mosaicHome, 'fleet', 'run', `${agentName}.hb`);
 }
 
 /**
@@ -492,17 +444,15 @@ export function heartbeatPath(agentName: string, mosaicHome = defaultMosaicHome(
  *   ts=<iso8601>
  *   pid=<pid>
  *   status=<ok|busy>
- *   model=<model-id>   (optional — native runtime heartbeats self-report it)
  */
 export function parseHeartbeat(content: string | null, nowMs = Date.now()): HeartbeatInfo {
   if (content === null) {
-    return { ts: null, pid: null, status: null, health: 'unknown', ageMs: null, model: null };
+    return { ts: null, pid: null, status: null, health: 'unknown', ageMs: null };
   }
   const lines = content.split('\n');
   let ts: Date | null = null;
   let pid: number | null = null;
   let status: 'ok' | 'busy' | null = null;
-  let model: string | null = null;
   for (const line of lines) {
     const [key, ...rest] = line.split('=');
     const val = rest.join('=').trim();
@@ -514,18 +464,16 @@ export function parseHeartbeat(content: string | null, nowMs = Date.now()): Hear
       if (Number.isFinite(n)) pid = n;
     } else if (key === 'status' && (val === 'ok' || val === 'busy')) {
       status = val;
-    } else if (key === 'model' && val) {
-      model = val;
     }
   }
-  const thresholdMs = heartbeatIntervalMs() * HEARTBEAT_HEALTHY_MULTIPLIER;
+  const thresholdMs = HEARTBEAT_INTERVAL_MS * HEARTBEAT_HEALTHY_MULTIPLIER;
   let health: 'healthy' | 'stale' | 'unknown' = 'unknown';
   let ageMs: number | null = null;
   if (ts !== null) {
     ageMs = nowMs - ts.getTime();
     health = ageMs <= thresholdMs ? 'healthy' : 'stale';
   }
-  return { ts, pid, status, health, ageMs, model };
+  return { ts, pid, status, health, ageMs };
 }
 
 /**
@@ -827,42 +775,19 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
   cmd
     .command('init')
     .description('Initialize a local fleet roster')
-    .option(
-      '--profile <name>',
-      `Roster profile: ${FLEET_PROFILES.join(', ')} (skips interactive wizard)`,
-    )
+    .option('--profile <name>', 'Roster profile: minimal or local-canary', 'minimal')
     .option('--write', 'Write the roster to Mosaic home')
     .option('--force', 'Overwrite an existing roster when used with --write')
-    .action(async (opts: { profile?: string; write?: boolean; force?: boolean }) => {
+    .action(async (opts: { profile: string; write?: boolean; force?: boolean }) => {
       const commandOpts = cmd.opts<{ mosaicHome: string; roster?: string }>();
       const activePaths = resolveFleetPaths(commandOpts.mosaicHome);
-
-      let profile: FleetProfile;
-      if (opts.profile !== undefined) {
-        // Explicit --profile flag: validate and use it (non-interactive path).
-        profile = parseInitProfile(opts.profile);
-      } else {
-        // No --profile: use wizard when stdin is a TTY, else default to 'general'.
-        const isTTY = deps.isStdinTTY ?? process.stdin.isTTY ?? false;
-        if (isTTY) {
-          profile = await promptFleetProfile();
-        } else {
-          process.stderr.write(
-            'Note: stdin is not a TTY; defaulting to fleet profile "general". ' +
-              'Use --profile <name> to select a different preset.\n',
-          );
-          profile = 'general';
-        }
-      }
-
-      const source = join(frameworkRoot, 'fleet', 'examples', resolvePresetFilename(profile));
+      const profile = parseInitProfile(opts.profile);
+      const source = join(frameworkRoot, 'fleet', 'examples', `${profile}.yaml`);
       const content = await readFile(source, 'utf8');
-
       if (!opts.write) {
         console.log(content.trimEnd());
         return;
       }
-
       const destination = commandOpts.roster ?? activePaths.rosterPath;
       if (!opts.force && (await canRead(destination))) {
         throw new Error(
@@ -871,23 +796,7 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
       }
       await mkdir(dirname(destination), { recursive: true });
       await writeFile(destination, content);
-
-      // Validate: exactly one orchestrator required (R5) — friendly summary on success.
-      const written = await loadFleetRoster(destination);
-      const orchCount = countOrchestrators(written);
-      if (orchCount !== 1) {
-        process.stderr.write(
-          `Warning: fleet roster at ${destination} has ${orchCount} orchestrator agent(s) (expected exactly 1).\n`,
-        );
-        console.log(
-          `Initialized ${profile} fleet: ${written.agents.length} agent(s). Next: mosaic fleet install`,
-        );
-      } else {
-        const workerCount = written.agents.length - 1;
-        console.log(
-          `Initialized ${profile} fleet: 1 orchestrator + ${workerCount} agent(s). Next: mosaic fleet install`,
-        );
-      }
+      console.log(`Wrote fleet roster: ${destination}`);
     });
 
   cmd
@@ -988,9 +897,7 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
 
   cmd
     .command('ps')
-    .description(
-      'Show real-time status for all roster agents and unmanaged socket sessions (systemd + tmux + heartbeat)',
-    )
+    .description('Show real-time status for all roster agents (systemd + tmux + heartbeat)')
     .option('--json', 'Print JSON array')
     .action(async (opts: { json?: boolean }) => {
       const commandOpts = cmd.opts<{ mosaicHome: string; roster?: string }>();
@@ -1001,9 +908,6 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
 
       const rows: AgentPsRow[] = [];
 
-      // Build the set of roster agent names for quick lookup when filtering socket sessions.
-      const rosterAgentNames = new Set(roster.agents.map((a) => a.name));
-
       for (const agent of roster.agents) {
         // systemd show
         const showResult = await runner(...splitCommand(buildSystemdShowCommand(agent.name)));
@@ -1044,75 +948,9 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
           heartbeat: hb,
           driftFlag,
           bootEnableWarning,
-          managed: true,
-          source: 'roster',
         });
       }
 
-      // Enumerate all live sessions on the socket to surface unmanaged (ad-hoc) sessions.
-      // If list-sessions fails (socket not up), silently skip — show roster rows only.
-      try {
-        const listSessionsResult = await runner(
-          ...splitCommand(buildTmuxListSessionsCommand(roster.tmux.socketName)),
-        );
-        if (listSessionsResult.exitCode === 0) {
-          const socketSessions = parseTmuxListSessions(listSessionsResult.stdout);
-          const holderSession = roster.tmux.holderSession;
-
-          for (const sessionName of socketSessions) {
-            // Skip roster agents (already in rows) and the holder session (infrastructure).
-            if (rosterAgentNames.has(sessionName) || sessionName === holderSession) {
-              continue;
-            }
-
-            // tmux list-panes for pane info
-            const panesResult = await runner(
-              ...splitCommand(buildTmuxListPanesCommand(sessionName, roster.tmux.socketName)),
-            );
-            const paneInfo = parseTmuxListPanes(panesResult.stdout, nowMs);
-
-            // heartbeat — try reading the .hb file using the same path convention
-            const hbFile = heartbeatPath(sessionName, activePaths.mosaicHome);
-            let hbContent: string | null = null;
-            try {
-              hbContent = await readFile(hbFile, 'utf8');
-            } catch {
-              hbContent = null;
-            }
-            const hb = parseHeartbeat(hbContent, nowMs);
-
-            // systemd — check if mosaic-agent@<name>.service exists (usually inactive for ad-hoc)
-            const showResult = await runner(...splitCommand(buildSystemdShowCommand(sessionName)));
-            const sysInfo = parseSystemdShow(showResult.stdout);
-
-            const bootEnableWarning =
-              sysInfo.ActiveState === 'active' && sysInfo.UnitFileState === 'disabled';
-
-            rows.push({
-              name: sessionName,
-              tenant_id,
-              host,
-              // runtime unknown — not in roster
-              runtime: 'unknown',
-              systemdActive: sysInfo.ActiveState,
-              systemdEnabled: sysInfo.UnitFileState,
-              paneAlive: !paneInfo.dead,
-              panePid: paneInfo.pid,
-              paneCommand: paneInfo.command,
-              idleSeconds: paneInfo.idleSeconds,
-              heartbeat: hb,
-              // No roster runtime to compare — drift is not meaningful for unmanaged sessions
-              driftFlag: false,
-              bootEnableWarning,
-              managed: false,
-              source: 'socket',
-            });
-          }
-        }
-      } catch {
-        // list-sessions failed (socket missing or permission error) — show roster rows only
-      }
-
       if (opts.json) {
         console.log(JSON.stringify(rows, null, 2));
         return;
@@ -1129,7 +967,6 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
         'PID'.padEnd(8),
         'IDLE'.padEnd(8),
         'HB'.padEnd(12),
-        'MODEL'.padEnd(22),
         'FLAGS',
       ].join(' ');
       console.log(header);
@@ -1144,9 +981,7 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
           row.heartbeat.ageMs !== null
             ? `${Math.round(row.heartbeat.ageMs / 1000)}s/${row.heartbeat.health}`
             : `unknown`;
-        const model = row.heartbeat.model ?? '-';
         const flags: string[] = [];
-        if (!row.managed) flags.push('UNMANAGED');
         if (row.driftFlag) flags.push('DRIFT');
         if (row.bootEnableWarning) flags.push('BOOT-ENABLE');
 
@@ -1161,119 +996,12 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
             pid.padEnd(8),
             idle.padEnd(8),
             hbAge.padEnd(12),
-            model.padEnd(22),
             flags.join(','),
           ].join(' '),
         );
       }
     });
 
-  cmd
-    .command('add <name>')
-    .description('Add a new agent to the fleet roster and optionally start it')
-    .requiredOption('--runtime <runtime>', `Agent runtime (${VALID_FLEET_RUNTIMES.join(', ')})`)
-    .requiredOption('--class <class>', 'Agent class (e.g. worker, orchestrator, canary)')
-    .option('--model <hint>', 'Model hint for the agent')
-    .option('--working-dir <path>', 'Working directory for the agent')
-    .option('--no-start', 'Skip starting the agent after adding')
-    .action(
-      async (
-        name: string,
-        opts: {
-          runtime: string;
-          class: string;
-          model?: string;
-          workingDir?: string;
-          start: boolean;
-        },
-      ) => {
-        if (!VALID_FLEET_RUNTIMES.includes(opts.runtime)) {
-          throw new Error(
-            `Invalid runtime "${opts.runtime}". Valid runtimes: ${VALID_FLEET_RUNTIMES.join(', ')}.`,
-          );
-        }
-        const commandOpts = cmd.opts<{ mosaicHome: string; roster?: string }>();
-        const activePaths = resolveFleetPaths(commandOpts.mosaicHome);
-        const rosterPath = await resolveRosterPath(commandOpts.mosaicHome, commandOpts.roster);
-        const roster = await loadFleetRoster(rosterPath);
-
-        const newAgent: FleetAgent = {
-          name,
-          runtime: opts.runtime,
-          className: opts.class,
-          ...(opts.workingDir !== undefined && { workingDirectory: opts.workingDir }),
-          ...(opts.model !== undefined && { modelHint: opts.model }),
-        };
-
-        const updatedRoster = addAgentToRoster(roster, newAgent);
-        await writeFile(rosterPath, serializeRosterToYaml(updatedRoster));
-
-        const envPath = join(activePaths.agentEnvDir, `${name}.env`);
-        const existingEnv = (await canRead(envPath)) ? await readFile(envPath, 'utf8') : undefined;
-        await mkdir(activePaths.agentEnvDir, { recursive: true });
-        await writeFile(
-          envPath,
-          mergeAgentEnv(generateAgentEnv(updatedRoster, newAgent), existingEnv),
-        );
-
-        console.log(`Added ${name} (${opts.runtime}/${opts.class}) to the fleet.`);
-
-        if (opts.start !== false) {
-          await runChecked(runner, buildFleetServiceCommand('start', name));
-          console.log(`Started mosaic-agent@${name}.service.`);
-        } else {
-          console.log(`Agent queued (--no-start); run: mosaic fleet start ${name}`);
-        }
-      },
-    );
-
-  cmd
-    .command('remove <name>')
-    .description('Remove an agent from the fleet roster')
-    .option('--keep-files', 'Skip deleting env and heartbeat files')
-    .action(async (name: string, opts: { keepFiles?: boolean }) => {
-      const commandOpts = cmd.opts<{ mosaicHome: string; roster?: string }>();
-      const activePaths = resolveFleetPaths(commandOpts.mosaicHome);
-      const rosterPath = await resolveRosterPath(commandOpts.mosaicHome, commandOpts.roster);
-      const roster = await loadFleetRoster(rosterPath);
-
-      // Guard: throws if removing leaves 0 orchestrators or agent not in roster
-      const updatedRoster = removeAgentFromRoster(roster, name);
-
-      // Stop agent (non-fatal)
-      try {
-        const stopResult = await runner(...splitCommand(buildFleetServiceCommand('stop', name)));
-        if (stopResult.exitCode !== 0) {
-          process.stderr.write(
-            `Warning: could not stop mosaic-agent@${name}.service: ${stopResult.stderr || stopResult.stdout || 'non-zero exit'}\n`,
-          );
-        }
-      } catch (err) {
-        process.stderr.write(
-          `Warning: stop command failed for ${name}: ${err instanceof Error ? err.message : String(err)}\n`,
-        );
-      }
-
-      // Write updated roster
-      await writeFile(rosterPath, serializeRosterToYaml(updatedRoster));
-
-      // Delete env and heartbeat files (best-effort, non-fatal)
-      if (!opts.keepFiles) {
-        try {
-          await unlink(join(activePaths.agentEnvDir, `${name}.env`));
-        } catch {
-          // best-effort
-        }
-        try {
-          await unlink(heartbeatPath(name, activePaths.mosaicHome));
-        } catch {
-          // best-effort
-        }
-      }
-
-      console.log(`Removed ${name} from the fleet.`);
-    });
-
   return cmd;
 }
 
@@ -1453,19 +1181,15 @@ export function registerFleetAgentCommands(
 
       await runChecked(runner, buildAgentWatchCreateViewerCommand(agent, viewerName, socketName));
 
-      let exitCode = 0;
-      try {
       const [bin, args] = splitCommand(buildAgentWatchAttachCommand(viewerName, socketName));
-        exitCode = await iRunner(bin, args);
-      } finally {
-        // ALWAYS clean up the viewer session — even if attach threw or the process was
-        // interrupted — so stale grouped *-watch-* sessions never accumulate. Errors here
-        // are intentionally suppressed; the agent session is unaffected.
+      const exitCode = await iRunner(bin, args);
+
+      // Best-effort cleanup of the viewer session regardless of how the user detached.
+      // Errors here are intentionally suppressed — the agent session is unaffected.
       const killResult = await runner(
         ...splitCommand(buildAgentWatchKillViewerCommand(viewerName, socketName)),
       );
-        void killResult;
-      }
+      void killResult; // result is intentionally ignored
 
       if (exitCode !== 0) {
         process.exitCode = exitCode;
@@ -1848,195 +1572,11 @@ function splitCommand(command: string[]): [string, string[]] {
   return [bin, args];
 }
 
-/** All supported fleet profile names. */
-export type FleetProfile =
-  | 'general'
-  | 'coding'
-  | 'research'
-  | 'hybrid'
-  | 'minimal'
-  | 'local-canary';
-
-/** The list of all valid fleet profile names, for wizard menus and error messages. */
-export const FLEET_PROFILES: readonly FleetProfile[] = [
-  'general',
-  'coding',
-  'research',
-  'hybrid',
-  'minimal',
-  'local-canary',
-];
-
-/**
- * Maps a fleet profile name to its example YAML filename (without the path).
- * Pure function — testable without I/O.
- */
-export function resolvePresetFilename(profile: FleetProfile): string {
-  return `${profile}.yaml`;
-}
-
-/**
- * Validate and normalise a fleet profile name string.
- * Throws with a clear message on unknown values.
- */
-export function parseInitProfile(profile: string): FleetProfile {
-  if ((FLEET_PROFILES as readonly string[]).includes(profile)) {
-    return profile as FleetProfile;
+function parseInitProfile(profile: string): 'minimal' | 'local-canary' {
+  if (profile === 'minimal' || profile === 'local-canary') {
+    return profile;
   }
-  throw new Error(`Unsupported fleet profile "${profile}". Use: ${FLEET_PROFILES.join(', ')}.`);
-}
-
-/**
- * Count orchestrator agents in a parsed roster.
- * Returns the count; callers assert === 1.
- */
-export function countOrchestrators(roster: FleetRoster): number {
-  return roster.agents.filter((a) => a.className === 'orchestrator').length;
-}
-
-/** Valid runtime identifiers for fleet agents. */
-export const VALID_FLEET_RUNTIMES: readonly string[] = [
-  'pi',
-  'claude',
-  'codex',
-  'opencode',
-  'dogfood',
-];
-
-/**
- * Add a new agent to a fleet roster (immutable — returns a new FleetRoster).
- * Throws on invalid name, duplicate name.
- */
-export function addAgentToRoster(roster: FleetRoster, agent: FleetAgent): FleetRoster {
-  if (!agent.name || !/^[A-Za-z0-9_.-]+$/.test(agent.name)) {
-    throw new Error(`Invalid fleet agent name: ${agent.name || '<empty>'}`);
-  }
-  if (roster.agents.some((a) => a.name === agent.name)) {
-    throw new Error(`Agent "${agent.name}" already exists in the fleet roster.`);
-  }
-  return {
-    ...roster,
-    agents: [...roster.agents, agent],
-  };
-}
-
-/**
- * Remove an agent from a fleet roster (immutable — returns a new FleetRoster).
- * Throws if the agent is not found, or if removal would leave zero orchestrators.
- */
-export function removeAgentFromRoster(roster: FleetRoster, name: string): FleetRoster {
-  const agent = roster.agents.find((a) => a.name === name);
-  if (!agent) {
-    throw new Error(`Agent "${name}" is not in the fleet roster.`);
-  }
-  const remaining = roster.agents.filter((a) => a.name !== name);
-  const remainingOrchCount = remaining.filter((a) => a.className === 'orchestrator').length;
-  if (remainingOrchCount === 0 && agent.className === 'orchestrator') {
-    throw new Error(
-      `Cannot remove agent "${name}": it is the sole orchestrator. Add another orchestrator first (R5).`,
-    );
-  }
-  return {
-    ...roster,
-    agents: remaining,
-  };
-}
-
-/**
- * Serialize a FleetRoster to YAML text (snake_case keys).
- * The output is parseable by loadFleetRoster.
- */
-export function serializeRosterToYaml(roster: FleetRoster): string {
-  const agents = roster.agents.map((agent) => {
-    const raw: Record<string, unknown> = {
-      name: agent.name,
-      runtime: agent.runtime,
-      class: agent.className,
-    };
-    if (agent.workingDirectory !== undefined) {
-      raw['working_directory'] = agent.workingDirectory;
-    }
-    if (agent.modelHint !== undefined) {
-      raw['model_hint'] = agent.modelHint;
-    }
-    if (agent.persistentPersona !== undefined) {
-      raw['persistent_persona'] = agent.persistentPersona;
-    }
-    if (agent.resetBetweenTasks !== undefined) {
-      raw['reset_between_tasks'] = agent.resetBetweenTasks;
-    }
-    if (agent.kickstartTemplate !== undefined) {
-      raw['kickstart_template'] = agent.kickstartTemplate;
-    }
-    return raw;
-  });
-
-  const runtimes: Record<string, { reset_command: string }> = {};
-  for (const [runtime, config] of Object.entries(roster.runtimes)) {
-    runtimes[runtime] = { reset_command: config.resetCommand };
-  }
-
-  const raw: Record<string, unknown> = {
-    version: roster.version,
-    transport: roster.transport,
-    tmux: {
-      socket_name: roster.tmux.socketName,
-      holder_session: roster.tmux.holderSession,
-    },
-    defaults: {
-      working_directory: roster.defaults.workingDirectory,
-    },
-    runtimes,
-    agents,
-  };
-
-  return YAML.stringify(raw);
-}
-
-/**
- * Prompt interactively for a fleet profile via stdin readline.
- * AI-free: no LLM calls — pure readline menu.
- * Resolves with the chosen profile string, or rejects on I/O error.
- */
-function promptFleetProfile(): Promise<FleetProfile> {
-  return new Promise((resolve, reject) => {
-    const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
-    const menu = [
-      '',
-      'Choose a fleet configuration type:',
-      '  1) general      — orchestrator + generalist worker',
-      '  2) coding       — orchestrator + coder0 + coder1 + reviewer',
-      '  3) research     — orchestrator + researcher0 + researcher1 + analyst',
-      '  4) hybrid       — orchestrator + coder0 + researcher0 + reviewer',
-      '  5) minimal      — single canary-pi agent (no orchestrator)',
-      '  6) local-canary — legacy canary preset with lead + coder + reviewer',
-      '',
-    ].join('\n');
-    process.stdout.write(menu);
-    rl.question('Enter number or name [1]: ', (answer) => {
-      rl.close();
-      const trimmed = answer.trim();
-      // Map numeric shortcut → name
-      const byNumber: Record<string, FleetProfile> = {
-        '1': 'general',
-        '2': 'coding',
-        '3': 'research',
-        '4': 'hybrid',
-        '5': 'minimal',
-        '6': 'local-canary',
-        '': 'general', // default on empty enter
-      };
-      if (trimmed in byNumber) {
-        resolve(byNumber[trimmed]!);
-        return;
-      }
-      try {
-        resolve(parseInitProfile(trimmed));
-      } catch (err) {
-        reject(err);
-      }
-    });
-  });
+  throw new Error(`Unsupported fleet profile "${profile}". Use: minimal, local-canary.`);
 }
 
 function writeCommandOutput(result: CommandResult): void {

packages/mosaic/src/config/file-adapter.test.ts

@@ -99,8 +99,11 @@ describe('FileConfigAdapter.syncFramework — defaults seeding', () => {
     );
   });
 
-  it('overwrites framework-owned files (backup-once) but preserves user-seeded files', async () => {
-    // Plant a root-level AGENTS.md in sourceDir so syncDirectory's preserve is exercised.
+  it('preserves existing contract files — never overwrites user customization', async () => {
+    // Also plant a root-level AGENTS.md in sourceDir so that `syncDirectory`
+    // itself (not just the seed loop) has something to try to overwrite.
+    // Without this, the test would silently pass even if preserve semantics
+    // were broken in syncDirectory.
     writeFileSync(join(fixture.sourceDir, 'AGENTS.md'), '# shipped AGENTS from source root\n');
 
     writeFileSync(join(fixture.mosaicHome, 'TOOLS.md'), '# user-customized TOOLS\n');
@@ -109,50 +112,18 @@ describe('FileConfigAdapter.syncFramework — defaults seeding', () => {
     const adapter = new FileConfigAdapter(fixture.mosaicHome, fixture.sourceDir);
     await adapter.syncFramework('keep');
 
-    // User-seeded TOOLS.md is preserved.
     expect(readFileSync(join(fixture.mosaicHome, 'TOOLS.md'), 'utf-8')).toBe(
       '# user-customized TOOLS\n',
     );
-    // Framework-owned AGENTS.md is overwritten from defaults/ ...
-    expect(readFileSync(join(fixture.mosaicHome, 'AGENTS.md'), 'utf-8')).toBe('# AGENTS default\n');
-    // ... and the user's prior copy is backed up exactly once.
-    expect(readFileSync(join(fixture.mosaicHome, 'AGENTS.md.pre-constitution.bak'), 'utf-8')).toBe(
+    expect(readFileSync(join(fixture.mosaicHome, 'AGENTS.md'), 'utf-8')).toBe(
       '# user-customized AGENTS\n',
     );
-    // Framework-owned STANDARDS.md (absent) gets installed.
+    // And the missing contract file still gets seeded.
     expect(readFileSync(join(fixture.mosaicHome, 'STANDARDS.md'), 'utf-8')).toContain(
       '# STANDARDS default',
     );
   });
 
-  it('backs up a divergent framework-owned file only once (idempotent across re-sync)', async () => {
-    writeFileSync(join(fixture.mosaicHome, 'AGENTS.md'), '# user-customized AGENTS\n');
-    const adapter = new FileConfigAdapter(fixture.mosaicHome, fixture.sourceDir);
-
-    await adapter.syncFramework('keep'); // 1st: backup created, AGENTS overwritten
-    await adapter.syncFramework('keep'); // 2nd: AGENTS already == default, no new backup
-
-    expect(readFileSync(join(fixture.mosaicHome, 'AGENTS.md.pre-constitution.bak'), 'utf-8')).toBe(
-      '# user-customized AGENTS\n',
-    );
-  });
-
-  it('preserves SOUL.md and credentials through a framework-owned overwrite', async () => {
-    writeFileSync(join(fixture.mosaicHome, 'SOUL.md'), '# my persona\n');
-    writeFileSync(join(fixture.mosaicHome, 'AGENTS.md'), '# user-customized AGENTS\n');
-    mkdirSync(join(fixture.mosaicHome, 'credentials'), { recursive: true });
-    writeFileSync(join(fixture.mosaicHome, 'credentials', 'c.json'), 'token\n');
-
-    const adapter = new FileConfigAdapter(fixture.mosaicHome, fixture.sourceDir);
-    await adapter.syncFramework('keep');
-
-    expect(readFileSync(join(fixture.mosaicHome, 'SOUL.md'), 'utf-8')).toBe('# my persona\n');
-    expect(readFileSync(join(fixture.mosaicHome, 'credentials', 'c.json'), 'utf-8')).toBe(
-      'token\n',
-    );
-    expect(readFileSync(join(fixture.mosaicHome, 'AGENTS.md'), 'utf-8')).toBe('# AGENTS default\n');
-  });
-
   it('is a no-op for seeding when defaults/ dir does not exist', async () => {
     rmSync(fixture.defaultsDir, { recursive: true });
 

packages/mosaic/src/config/file-adapter.ts

@@ -13,17 +13,12 @@ import { join } from 'node:path';
  * This list must match the explicit seed loop in
  * packages/mosaic/framework/install.sh.
  */
-// Framework-owned contract files: re-copied from defaults/ on every upgrade (a
-// divergent existing copy is backed up once to <file>.pre-constitution.bak first).
-// MUST match FRAMEWORK_OWNED in packages/mosaic/framework/install.sh (append-friendly).
-export const FRAMEWORK_OWNED_FILES = ['CONSTITUTION.md', 'AGENTS.md', 'STANDARDS.md'] as const;
-
-// User-seeded contract files: written once on first install, then owned by the user.
-// MUST match USER_SEEDED in packages/mosaic/framework/install.sh.
-export const USER_SEEDED_FILES = ['TOOLS.md'] as const;
-
-// Union, retained for callers/tests that assert the full seed set on a fresh install.
-export const DEFAULT_SEED_FILES = [...FRAMEWORK_OWNED_FILES, ...USER_SEEDED_FILES] as const;
+export const DEFAULT_SEED_FILES = [
+  'CONSTITUTION.md',
+  'AGENTS.md',
+  'STANDARDS.md',
+  'TOOLS.md',
+] as const;
 import type { ConfigService, ConfigSection, ResolvedConfig } from './config-service.js';
 import type { SoulConfig, UserConfig, ToolsConfig, InstallAction } from '../types.js';
 import { soulSchema, userSchema, toolsSchema } from './schemas.js';
@@ -164,7 +159,6 @@ export class FileConfigAdapter implements ConfigService {
     const preservePaths =
       action === 'keep' || action === 'reconfigure'
         ? [
-            'CONSTITUTION.md',
             'AGENTS.md',
             'SOUL.md',
             'USER.md',
@@ -181,10 +175,10 @@ export class FileConfigAdapter implements ConfigService {
       excludeGit: true,
     });
 
-    // Reconcile framework-contract files from framework/defaults/ into the mosaic
-    // home root: framework-owned files (CONSTITUTION/AGENTS/STANDARDS) are overwritten
-    // every upgrade (backup-once); user-seeded files (TOOLS) are written on first
-    // install only. Mirrors reconcile_framework_files() in install.sh.
+    // Copy framework-contract files (AGENTS.md, STANDARDS.md, TOOLS.md)
+    // from framework/defaults/ into the mosaic home root if they don't
+    // exist yet. These are written on first install only and are never
+    // overwritten afterwards — the user may have customized them.
     //
     // SOUL.md and USER.md are deliberately NOT seeded here. They are
     // generated from templates by the soul/user wizard stages with
@@ -192,22 +186,7 @@ export class FileConfigAdapter implements ConfigService {
     // identity flow and leak placeholder content into the mosaic home.
     const defaultsDir = join(this.sourceDir, 'defaults');
     if (existsSync(defaultsDir)) {
-      // Framework-owned: overwrite from defaults/ every sync; back up a divergent
-      // existing copy ONCE to <file>.pre-constitution.bak before the first overwrite.
-      for (const entry of FRAMEWORK_OWNED_FILES) {
-        const src = join(defaultsDir, entry);
-        const dest = join(this.mosaicHome, entry);
-        if (!existsSync(src) || !statSync(src).isFile()) continue;
-        // Already current — skip to avoid mtime churn.
-        if (existsSync(dest) && readFileSync(src).equals(readFileSync(dest))) continue;
-        const bak = `${dest}.pre-constitution.bak`;
-        if (existsSync(dest) && !existsSync(bak)) {
-          copyFileSync(dest, bak);
-        }
-        copyFileSync(src, dest);
-      }
-      // User-seeded: write only if absent.
-      for (const entry of USER_SEEDED_FILES) {
+      for (const entry of DEFAULT_SEED_FILES) {
         const src = join(defaultsDir, entry);
         const dest = join(this.mosaicHome, entry);
         if (existsSync(dest)) continue;