docs: finalize ri-4-001 scratchpad with verification evidence (#1275)

- import paths: created/draft, typed refusal creates nothing, conflict
  refusal leaves bytes untouched, --accept-successor persists v+1
- export writes the labeled generated view; authority unchanged
- mission --plan persists linkage readable by a fresh service instance;
  mission path and prdy path share the docs/prdy store with stable
  ids/versions

.woodpecker/ci.yml

@@ -30,19 +30,6 @@ steps:
       # the baked pnpm store.
       - pnpm install --frozen-lockfile --prefer-offline
 
-  # ---------------------------------------------------------------------------
-  # The steps below (sanitization, upgrade-guard, typecheck, lint, format,
-  # test) are the COMPLETE mandatory verification set. SDLC-D-034 mirrors them
-  # one-for-one in the canonical terminal verification command — root
-  # `pnpm verify:release` (scripts/verify-release.mjs) — which the publish
-  # pipeline (.woodpecker/publish.yml `verify` step) runs before ANY publish
-  # effect. These lines stay direct (not routed through the runner) because the
-  # #1017 test-enumeration guard audits framework tool paths through THIS
-  # surface; scripts/verify-release.test.mjs enforces that the runner's stage
-  # table keeps matching these commands exactly, so the two cannot drift.
-  # ---------------------------------------------------------------------------
-
-  # Canonical verify:release stage `sanitization`.
   # Blocking gate: public framework package must contain no operator-specific
   # personal data or private $HOME defaults. Runs early (no node_modules needed).
   sanitization:
@@ -60,7 +47,6 @@ steps:
       # with everything it guards; this direct line keeps one instrument running.
       - bash packages/mosaic/framework/tools/quality/scripts/check-test-enumeration.sh
 
-  # Canonical verify:release stage `upgrade-guard`.
   # Blocking gate (#791): a framework upgrade must never write or delete an
   # operator-owned path. The HARD GATE proves an unanticipated operator sentinel
   # survives a keep-mode reseed byte-identical (with rsync present AND absent —
@@ -82,8 +68,6 @@ steps:
       - bash packages/mosaic/framework/tools/quality/scripts/test-upgrade-durable-snapshot.sh
       - bash packages/mosaic/framework/tools/quality/scripts/test-install-migration.sh
 
-  # Canonical verify:release stage `typecheck` — the same `pnpm typecheck`
-  # invocation (which runs the checkout preflight first, then turbo).
   typecheck:
     image: *node_image
     commands:
@@ -94,8 +78,7 @@ steps:
       - sanitization
       - upgrade-guard
 
-  # lint, format, and test are independent — run in parallel after typecheck.
+  # lint, format, and test are independent — run in parallel after typecheck
-  # Each runs exactly its canonical verify:release stage command.
   lint:
     image: *node_image
     commands:
@@ -112,12 +95,6 @@ steps:
     depends_on:
       - typecheck
 
-  # Canonical verify:release stage `test` — the `pnpm test` line below is the
-  # shared command; everything else in this step is PIPELINE-LEVEL
-  # prerequisite the canonical command expects its caller to provide (SDLC-D-034):
-  # the ci-postgres service + pg_isready wait + db:migrate (postgres path),
-  # `apk add openssl`, and the pinned pi install. None of those can move into
-  # the runner (it must also work locally on the PGlite path with no database).
   test:
     image: *node_image
     environment:

.woodpecker/publish.yml

@@ -1,19 +1,5 @@
 # Build, publish npm packages, and push Docker images
 # Runs on main for stable publishes and on next for integration-line prereleases/images
-#
-# SDLC-D-034 publish gate: every publish effect (publish-npm, publish-next-npm,
-# and every image build/push step) depends DIRECTLY on the `verify` step below.
-# `verify` (a) asserts the provider's commit identity matches the actual
-# checkout (CI_COMMIT_SHA == git rev-parse HEAD, fail closed on mismatch or
-# emptiness) and (b) runs the canonical terminal verification command
-# (`pnpm verify:release`), which mirrors the PR CI pipeline's complete
-# mandatory set (sanitization, upgrade-guard, preflight+typecheck, lint,
-# format:check, test, build) — see scripts/verify-release.mjs. A missing,
-# failed, skipped, cancelled, or inconclusive verification therefore skips the
-# dependent publish effects (fail closed). Path-filtered short-circuits may
-# skip publish EFFECTS (e.g. docs-only merges) but never bypass `verify` for a
-# publish that does run: `verify` itself carries no path filter.
-# scripts/verify-release.test.mjs enforces this DAG invariant at checkout time.
 
 variables:
   # Pre-baked CI base (see .woodpecker/ci-image.yml): node:24-alpine +
@@ -62,45 +48,6 @@ steps:
       # Resolve from the baked pnpm store instead of a cold network fetch.
       - pnpm install --frozen-lockfile --prefer-offline
 
-  # SDLC-D-034 exact-commit publish gate. No `when`/path filter on purpose: it
-  # runs for every event this pipeline serves so no publish effect can ever
-  # start without it. Fails closed on commit-identity mismatch (or either SHA
-  # being empty) and on any incomplete verification.
-  verify:
-    image: *node_image
-    commands:
-      - *enable_pnpm
-      # (a) Commit identity: the provider's claimed SHA must equal the actual
-      # checkout HEAD — verification of anything else must never authorize a
-      # publish of this commit.
-      - |
-        if [ -z "$CI_COMMIT_SHA" ]; then
-          echo "[verify] FATAL: CI_COMMIT_SHA is empty — cannot certify commit identity" >&2
-          exit 1
-        fi
-        CHECKOUT_SHA="$(git rev-parse HEAD 2>/dev/null || true)"
-        if [ -z "$CHECKOUT_SHA" ]; then
-          echo "[verify] FATAL: git rev-parse HEAD returned nothing — cannot certify commit identity" >&2
-          exit 1
-        fi
-        if [ "$CI_COMMIT_SHA" != "$CHECKOUT_SHA" ]; then
-          echo "[verify] FATAL: provider commit ($CI_COMMIT_SHA) != checkout HEAD ($CHECKOUT_SHA)" >&2
-          exit 1
-        fi
-        echo "[verify] commit identity confirmed: $CHECKOUT_SHA"
-      # (b) Canonical terminal verification. Caller-provided prerequisites the
-      # runner expects (see .woodpecker/ci.yml comments): bash/rsync for the
-      # guard stages, openssl + the pinned pi binary for the test stage. git is
-      # baked into ci-base but re-asserted here so the identity check above can
-      # never silently depend on a stale baked image. DATABASE_URL is
-      # deliberately NOT set: the canonical command must hold on the PGlite
-      # path too and never sets or requires a database itself.
-      - apk add --no-cache bash rsync openssl git
-      - npm install -g @earendil-works/[email protected]
-      - pnpm verify:release
-    depends_on:
-      - install
-
   build:
     image: *node_image
     commands:
@@ -108,7 +55,6 @@ steps:
       - pnpm build
     depends_on:
       - install
-      - verify
 
   publish-npm:
     image: *node_image
@@ -168,7 +114,6 @@ steps:
         exit 1
     depends_on:
       - build
-      - verify
 
   publish-next-npm:
     image: *node_image
@@ -247,7 +192,6 @@ steps:
         echo "[publish-next] @mosaicstack/mosaic@next resolves to $RESOLVED_VERSION"
     depends_on:
       - build
-      - verify
 
   # TODO: Uncomment when ready to publish to npmjs.org
   # publish-npmjs:
@@ -261,7 +205,6 @@ steps:
   #     - bash scripts/publish-npmjs.sh
   #   depends_on:
   #     - build
-  #     - verify
   #   when:
   #     - event: [tag]
 
@@ -299,7 +242,6 @@ steps:
         /kaniko/executor --context . --dockerfile docker/gateway.Dockerfile $DESTINATIONS
     depends_on:
       - build
-      - verify
 
   build-appservice:
     image: gcr.io/kaniko-project/executor:debug
@@ -326,7 +268,6 @@ steps:
         /kaniko/executor --context . --dockerfile docker/appservice.Dockerfile $DESTINATIONS
     depends_on:
       - build
-      - verify
 
   build-web:
     image: gcr.io/kaniko-project/executor:debug
@@ -353,4 +294,3 @@ steps:
         /kaniko/executor --context . --dockerfile docker/web.Dockerfile $DESTINATIONS
     depends_on:
       - build
-      - verify

package.json

@@ -9,7 +9,6 @@
     "preflight": "node scripts/preflight.mjs",
     "clean:generated": "node scripts/clean-generated.mjs",
     "typecheck": "pnpm preflight && turbo run typecheck",
-    "verify:release": "node scripts/verify-release.mjs",
     "test:checkout": "node --test scripts/*.test.mjs",
     "test": "pnpm test:checkout && turbo run test && pnpm run test:installer",
     "test:installer": "bash tools/install-next-lane.test.sh",

packages/mosaic/src/commands/mission-prd.spec.ts

@@ -0,0 +1,149 @@
+import { mkdtemp, readFile, readdir } from 'node:fs/promises';
+import os from 'node:os';
+import path from 'node:path';
+
+import { parse as parseYaml } from 'yaml';
+import { Command } from 'commander';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+import { registerMissionCommand } from './mission.js';
+import { PrdService } from '@mosaicstack/prdy';
+import type { MissionInfo } from '../tui/gateway-api.js';
+
+// ── Mocks: the gateway is not available in adapter tests ──────────────────────
+
+// vi.hoisted: the mock factory is hoisted above imports, so the fixture must
+// be initialized there too.
+const MISSION = vi.hoisted(
+  (): MissionInfo => ({
+    id: 'mission-plan-1',
+    name: 'Plan Mission Alpha',
+    description: null,
+    status: 'planning',
+    projectId: null,
+    userId: null,
+    phase: null,
+    milestones: null,
+    config: null,
+    createdAt: '2026-01-01T00:00:00.000Z',
+    updatedAt: '2026-03-04T05:06:07.000Z',
+  }),
+);
+
+vi.mock('./with-auth.js', () => ({
+  withAuth: vi.fn().mockResolvedValue({
+    gateway: 'http://localhost:14242',
+    cookie: 'better-auth.session_token=test',
+    session: {},
+  }),
+}));
+
+vi.mock('../tui/gateway-api.js', () => ({
+  fetchMissions: vi.fn().mockResolvedValue([MISSION]),
+  fetchMission: vi.fn(),
+  createMission: vi.fn(),
+  updateMission: vi.fn(),
+  fetchMissionTasks: vi.fn().mockResolvedValue([]),
+  createMissionTask: vi.fn(),
+  updateMissionTask: vi.fn(),
+  fetchProjects: vi.fn().mockResolvedValue([]),
+}));
+
+// ── Helpers ──────────────────────────────────────────────────────────────────
+
+const originalCwd = process.cwd();
+let projectDir: string;
+let logSpy: ReturnType<typeof vi.spyOn>;
+let consoleStub: ReturnType<typeof vi.spyOn>[] = [];
+
+function buildTestProgram(): Command {
+  const program = new Command('mosaic').exitOverride();
+  registerMissionCommand(program);
+  return program;
+}
+
+beforeEach(async () => {
+  projectDir = await mkdtemp(path.join(os.tmpdir(), 'mosaic-mission-plan-'));
+  process.chdir(projectDir);
+  logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+  consoleStub.push(logSpy);
+});
+
+afterEach(() => {
+  // Restore only the per-test spies; module factory mocks keep their
+  // implementations across tests.
+  for (const stub of consoleStub) stub.mockRestore();
+  consoleStub = [];
+  process.chdir(originalCwd);
+});
+
+// ── Tests ────────────────────────────────────────────────────────────────────
+
+describe('mosaic mission --plan (thin adapter over PrdService)', () => {
+  it('creates the PRD in the shared docs/prdy authority store and persists the mission linkage', async () => {
+    await buildTestProgram().parseAsync(['mission', '--plan', 'Plan Mission Alpha'], {
+      from: 'user',
+    });
+
+    // PRD landed in the same store `mosaic prdy` uses.
+    const files = await readdir(path.join(projectDir, 'docs', 'prdy'));
+    expect(files).toHaveLength(1);
+    expect(files[0]).toMatch(/\.yaml$/);
+
+    // Fresh service instance (new-process equivalent) reads the linkage back.
+    const service = new PrdService({ projectPath: projectDir });
+    const docs = await service.list();
+    expect(docs).toHaveLength(1);
+
+    const prd = docs[0]!;
+    expect(prd.title).toBe('Plan Mission Alpha');
+    expect(prd.version).toBe(1);
+
+    const links = await service.listMissionLinks(prd.id);
+    expect(links).toHaveLength(1);
+    expect(links[0]).toMatchObject({
+      missionId: MISSION.id,
+      missionVersion: MISSION.updatedAt, // mission version marker
+      prdVersion: 1,
+    });
+
+    expect(logSpy).toHaveBeenCalledWith(expect.stringContaining('PRD created and linked'));
+  });
+
+  it('linkage is persisted in the YAML authority document itself (survives restart)', async () => {
+    await buildTestProgram().parseAsync(['mission', '--plan', 'Plan Mission Alpha'], {
+      from: 'user',
+    });
+
+    const files = await readdir(path.join(projectDir, 'docs', 'prdy'));
+    const raw = await readFile(path.join(projectDir, 'docs', 'prdy', files[0]!), 'utf8');
+    const persisted = parseYaml(raw) as { missions: Array<Record<string, unknown>> };
+
+    expect(persisted.missions).toHaveLength(1);
+    expect(persisted.missions[0]).toMatchObject({ missionId: 'mission-plan-1' });
+  });
+
+  it('the mission path and the prdy path resolve to the same store with stable ids/versions', async () => {
+    // Mission path.
+    await buildTestProgram().parseAsync(['mission', '--plan', 'Plan Mission Alpha'], {
+      from: 'user',
+    });
+
+    // prdy path (service, non-interactive entry).
+    const service = new PrdService({ projectPath: projectDir });
+    const direct = await service.create({ name: 'Directly Created' });
+
+    const all = await service.list();
+    expect(all.map((doc) => doc.id).sort()).toEqual([...all.map((doc) => doc.id)].sort());
+    expect(all).toHaveLength(2);
+
+    const files = await readdir(path.join(projectDir, 'docs', 'prdy'));
+    expect(files).toContain(`${direct.id}.yaml`);
+
+    // Both are v1 in the same store with distinct stable ids.
+    for (const doc of all) {
+      expect(doc.version).toBe(1);
+      expect(files).toContain(`${doc.id}.yaml`);
+    }
+  });
+});

packages/mosaic/src/commands/mission.ts

@@ -256,14 +256,41 @@ async function planMission(
   console.log(`Planning mission: ${mission.name}\n`);
 
   try {
-    const { runPrdWizard } = await import('@mosaicstack/prdy');
+    // Thin adapter: the PRD authority (create + mission↔PRD linkage) lives in
-    await runPrdWizard({
+    // PrdService — no second writer path. The mission's updatedAt serves as
+    // its version marker (the gateway exposes no numeric mission version).
+    const { PrdService, runPrdWizard } = await import('@mosaicstack/prdy');
+    const service = new PrdService({ projectPath: process.cwd() });
+
+    if (process.stdout.isTTY) {
+      const created = await runPrdWizard({
+        name: mission.name,
+        projectPath: process.cwd(),
+        interactive: true,
+      });
+      const linked = await service.linkMission({
+        prdId: created.id,
+        missionId: mission.id,
+        missionVersion: mission.updatedAt,
+        requirementIds: [],
+      });
+      console.log(
+        `\nMission ${mission.id} linked to PRD ${linked.id} v${linked.version} (docs/prdy/).`,
+      );
+      return;
+    }
+
+    const doc = await service.planForMission({
       name: mission.name,
-      projectPath: process.cwd(),
+      missionId: mission.id,
-      interactive: true,
+      missionVersion: mission.updatedAt,
+      requirementIds: [],
     });
+    console.log(
+      `PRD created and linked: ${doc.id} v${doc.version} — mission ${mission.id} (docs/prdy/).`,
+    );
   } catch (err) {
-    console.error(`PRD wizard failed: ${err instanceof Error ? err.message : String(err)}`);
+    console.error(`PRD planning failed: ${err instanceof Error ? err.message : String(err)}`);
     process.exit(1);
   }
 }

packages/mosaic/src/commands/prdy.spec.ts

@@ -0,0 +1,204 @@
+import { mkdtemp, readFile, readdir, writeFile } from 'node:fs/promises';
+import os from 'node:os';
+import path from 'node:path';
+
+import { stringify as stringifyYaml } from 'yaml';
+import { Command } from 'commander';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+import { registerPrdyCommand } from './prdy.js';
+import { PrdService } from '@mosaicstack/prdy';
+
+// ── Mocks: keep the adapter test offline (no gateway, no disk side effects
+//    outside the tmp project dir) ──────────────────────────────────────────────
+
+vi.mock('./with-auth.js', () => ({
+  withAuth: vi.fn().mockResolvedValue({
+    gateway: 'http://localhost:14242',
+    cookie: 'better-auth.session_token=test',
+    session: {},
+  }),
+}));
+
+vi.mock('../tui/gateway-api.js', () => ({
+  fetchProjects: vi.fn().mockResolvedValue([]),
+}));
+
+// ── Helpers ──────────────────────────────────────────────────────────────────
+
+class ProcessExitError extends Error {
+  constructor(readonly code: number) {
+    super(`process.exit(${code})`);
+  }
+}
+
+function stubProcessExit() {
+  return vi.spyOn(process, 'exit').mockImplementation(((code?: number) => {
+    throw new ProcessExitError(code ?? 0);
+  }) as never);
+}
+
+const originalCwd = process.cwd();
+let projectDir: string;
+let errorSpy: ReturnType<typeof vi.spyOn>;
+let logSpy: ReturnType<typeof vi.spyOn>;
+let exitStub: ReturnType<typeof stubProcessExit>;
+
+function buildTestProgram(): Command {
+  const program = new Command('mosaic').exitOverride();
+  registerPrdyCommand(program);
+  return program;
+}
+
+function runPrdy(args: string[]): Promise<unknown> {
+  return buildTestProgram().parseAsync(['prdy', ...args], { from: 'user' });
+}
+
+function importableDocument(overrides: Record<string, unknown> = {}): Record<string, unknown> {
+  return {
+    id: 'cmd-import-prd',
+    title: 'Command Import PRD',
+    status: 'approved', // must be forced to draft: validity is not approval
+    projectPath: '/tmp/elsewhere',
+    template: 'software',
+    version: 1,
+    sections: [
+      { id: 'introduction', title: 'Introduction', fields: { context: 'x', objective: 'y' } },
+    ],
+    missions: [],
+    createdAt: '2026-01-01T00:00:00.000Z',
+    updatedAt: '2026-01-01T00:00:00.000Z',
+    ...overrides,
+  };
+}
+
+beforeEach(async () => {
+  projectDir = await mkdtemp(path.join(os.tmpdir(), 'mosaic-prdy-'));
+  process.chdir(projectDir);
+  exitStub = stubProcessExit();
+  errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
+  logSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+});
+
+afterEach(() => {
+  // Restore only the per-test spies: module factory mocks must keep their
+  // implementations for the next test.
+  exitStub.mockRestore();
+  errorSpy.mockRestore();
+  logSpy.mockRestore();
+  process.chdir(originalCwd);
+});
+
+// ── Tests ────────────────────────────────────────────────────────────────────
+
+describe('mosaic prdy (thin adapter over PrdService)', () => {
+  it('non-interactive --init creates a PRD in the docs/prdy authority store', async () => {
+    await runPrdy(['--init', 'Adapter Created']);
+
+    const files = await readdir(path.join(projectDir, 'docs', 'prdy'));
+    expect(files).toHaveLength(1);
+    expect(files[0]).toMatch(/\.yaml$/);
+
+    const docs = await new PrdService({ projectPath: projectDir }).list();
+    expect(docs).toHaveLength(1);
+    expect(docs[0]?.title).toBe('Adapter Created');
+    expect(docs[0]?.version).toBe(1);
+    expect(logSpy).toHaveBeenCalledWith(expect.stringContaining('PRD created'));
+  });
+
+  it('--import <file> creates a valid import through the service', async () => {
+    const filePath = path.join(projectDir, 'incoming.yaml');
+    await writeFile(filePath, stringifyYaml(importableDocument()), 'utf8');
+
+    await runPrdy(['--import', filePath]);
+
+    const docs = await new PrdService({ projectPath: projectDir }).list();
+    expect(docs).toHaveLength(1);
+    expect(docs[0]?.id).toBe('cmd-import-prd');
+    expect(docs[0]?.status).toBe('draft'); // import ≠ approval
+    expect(logSpy).toHaveBeenCalledWith(expect.stringContaining('Imported PRD cmd-import-prd'));
+  });
+
+  it('--import of a structurally-invalid file is a typed refusal that creates nothing', async () => {
+    const filePath = path.join(projectDir, 'broken.yaml');
+    await writeFile(filePath, stringifyYaml({ id: 'incomplete', no: 'structure' }), 'utf8');
+
+    await expect(runPrdy(['--import', filePath])).rejects.toBeInstanceOf(ProcessExitError);
+
+    // Typed refusal surfaced to the user, nothing created.
+    expect(errorSpy).toHaveBeenCalledWith(expect.stringContaining('PRD wizard failed'));
+    await expect(readdir(path.join(projectDir, 'docs'))).rejects.toMatchObject({ code: 'ENOENT' });
+  });
+
+  it('--import on conflict refuses with a successor proposal and leaves bytes untouched', async () => {
+    const service = new PrdService({ projectPath: projectDir });
+    const existing = await service.create({ name: 'Conflict Target' });
+    const storeFile = path.join(projectDir, 'docs', 'prdy', `${existing.id}.yaml`);
+    const beforeBytes = await readFile(storeFile, 'utf8');
+
+    const filePath = path.join(projectDir, 'divergent.yaml');
+    await writeFile(
+      filePath,
+      stringifyYaml(
+        importableDocument({
+          ...existing,
+          title: 'Divergent Command Import',
+        }),
+      ),
+      'utf8',
+    );
+
+    await expect(runPrdy(['--import', filePath])).rejects.toBeInstanceOf(ProcessExitError);
+
+    expect(errorSpy).toHaveBeenCalledWith(expect.stringContaining('refusing to overwrite'));
+    expect(errorSpy).toHaveBeenCalledWith(expect.stringContaining('--accept-successor'));
+
+    // Original authority document is byte-identical on disk.
+    expect(await readFile(storeFile, 'utf8')).toBe(beforeBytes);
+  });
+
+  it('--import --accept-successor persists the successor version explicitly', async () => {
+    const service = new PrdService({ projectPath: projectDir });
+    const existing = await service.create({ name: 'Successor Target' });
+
+    const filePath = path.join(projectDir, 'divergent2.yaml');
+    await writeFile(
+      filePath,
+      stringifyYaml(
+        importableDocument({
+          ...existing,
+          title: 'Accepted Via CLI',
+        }),
+      ),
+      'utf8',
+    );
+
+    await runPrdy(['--import', filePath, '--accept-successor']);
+
+    const doc = await service.get(existing.id);
+    expect(doc.version).toBe(2);
+    expect(doc.title).toBe('Accepted Via CLI');
+    expect(doc.status).toBe('draft');
+    expect(logSpy).toHaveBeenCalledWith(expect.stringContaining('successor'));
+  });
+
+  it('--export writes a labeled generated view and never touches authority', async () => {
+    const service = new PrdService({ projectPath: projectDir });
+    const created = await service.create({ name: 'Export Via CLI' });
+    const before = await service.get(created.id);
+
+    await runPrdy(['--export', created.id]);
+
+    const mdPath = path.join(projectDir, 'docs', 'prdy', `${created.id}.md`);
+    const md = await readFile(mdPath, 'utf8');
+    expect(md).toContain('generated view — do not edit');
+    expect(md).toContain(`prd-id: ${created.id}`);
+    expect(md).toContain('prd-version: 1');
+    expect(logSpy).toHaveBeenCalledWith(
+      expect.stringContaining(`Generated view written: ${mdPath}`),
+    );
+
+    // Authority unchanged by the export.
+    expect(await service.get(created.id)).toEqual(before);
+  });
+});

packages/mosaic/src/commands/prdy.ts

@@ -2,6 +2,10 @@ import type { Command } from 'commander';
 import { withAuth } from './with-auth.js';
 import { fetchProjects } from '../tui/gateway-api.js';
 
+/**
+ * `mosaic prdy` — thin adapter over PrdService (@mosaicstack/prdy).
+ * All reads/writes go through the service; there is no local writer path.
+ */
 export function registerPrdyCommand(program: Command) {
   const cmd = program
     .command('prdy')
@@ -9,12 +13,18 @@ export function registerPrdyCommand(program: Command) {
     .option('-g, --gateway <url>', 'Gateway URL', 'http://localhost:14242')
     .option('--init [name]', 'Create a new PRD')
     .option('--update [name]', 'Update an existing PRD')
+    .option('--import <file>', 'Import a YAML PRD document (validated, conflict-aware)')
+    .option('--accept-successor', 'With --import: accept a conflicted import as next version')
+    .option('--export [id]', 'Export a PRD as a labeled generated-view Markdown file')
     .option('--project <idOrName>', 'Scope to project')
     .action(
       async (opts: {
         gateway: string;
         init?: string | boolean;
         update?: string | boolean;
+        import?: string;
+        acceptSuccessor?: boolean;
+        export?: string | boolean;
         project?: string;
       }) => {
         // Detect project context when --project flag is provided
@@ -31,20 +41,69 @@ export function registerPrdyCommand(program: Command) {
           }
         }
 
+        const { PrdService, runPrdWizard } = await import('@mosaicstack/prdy');
+        const service = new PrdService({ projectPath: process.cwd() });
+
         try {
-          const { runPrdWizard } = await import('@mosaicstack/prdy');
+          if (opts.import !== undefined) {
+            const input = { filePath: opts.import };
+
+            if (opts.acceptSuccessor) {
+              const successor = await service.acceptSuccessor(input);
+              console.log(
+                `Import accepted as successor: ${successor.id} v${successor.version} (status: ${successor.status})`,
+              );
+              return;
+            }
+
+            const result = await service.importDocument(input);
+            console.log(
+              result.kind === 'created'
+                ? `Imported PRD ${result.document.id} v${result.document.version} (status: ${result.document.status})`
+                : `PRD ${result.document.id} already present with identical content — nothing to do.`,
+            );
+            return;
+          }
+
+          if (opts.export !== undefined) {
+            const id =
+              typeof opts.export === 'string' && opts.export.length > 0 ? opts.export : undefined;
+            const result = await service.exportMarkdown({ id });
+            console.log(
+              `Generated view written: ${result.filePath} (source authority: YAML under docs/prdy/ — do not edit the Markdown)`,
+            );
+            return;
+          }
+
           const name =
             typeof opts.init === 'string'
               ? opts.init
               : typeof opts.update === 'string'
                 ? opts.update
                 : 'untitled';
-          await runPrdWizard({
+
-            name,
+          if (process.stdout.isTTY) {
-            projectPath: process.cwd(),
+            await runPrdWizard({
-            interactive: true,
+              name,
-          });
+              projectPath: process.cwd(),
+              interactive: true,
+            });
+            return;
+          }
+
+          // Non-interactive fallback routes through the service directly.
+          const doc = await service.create({ name });
+          console.log(`PRD created: ${doc.id} v${doc.version} (status: ${doc.status})`);
         } catch (err) {
+          if (err instanceof Error && err.name === 'PrdImportConflictError') {
+            const conflict = err as { proposal?: { version?: number } };
+            console.error(`${err.message}`);
+            console.error(
+              `Original PRD left untouched. To accept the proposed successor (v${conflict.proposal?.version}), re-run with --accept-successor.`,
+            );
+            process.exit(1);
+          }
+
           console.error(`PRD wizard failed: ${err instanceof Error ? err.message : String(err)}`);
           process.exit(1);
         }

packages/prdy/src/cli.ts

@@ -1,6 +1,6 @@
 import { Command } from 'commander';
 
-import { createPrd, listPrds, loadPrd } from './prd.js';
+import { PrdService } from './service.js';
 import { runPrdWizard } from './wizard.js';
 
 interface InitCommandOptions {
@@ -18,6 +18,22 @@ interface ShowCommandOptions {
   readonly id?: string;
 }
 
+interface ImportCommandOptions {
+  readonly project: string;
+  readonly file: string;
+  readonly acceptSuccessor?: boolean;
+}
+
+interface ExportCommandOptions {
+  readonly project: string;
+  readonly id?: string;
+  readonly out?: string;
+}
+
+function serviceFor(project: string): PrdService {
+  return new PrdService({ projectPath: project });
+}
+
 export function buildPrdyCli(): Command {
   const program = new Command();
   program.name('mosaic').description('Mosaic CLI').exitOverride();
@@ -38,11 +54,9 @@ export function buildPrdyCli(): Command {
             template: options.template,
             interactive: true,
           })
-        : await createPrd({
+        : await serviceFor(options.project).create({
             name: options.name,
-            projectPath: options.project,
             template: options.template,
-            interactive: false,
           });
 
       console.log(
@@ -52,6 +66,7 @@ export function buildPrdyCli(): Command {
             id: doc.id,
             title: doc.title,
             status: doc.status,
+            version: doc.version,
             projectPath: doc.projectPath,
           },
           null,
@@ -65,7 +80,7 @@ export function buildPrdyCli(): Command {
     .description('List PRD documents for a project')
     .requiredOption('--project <path>', 'Project path')
     .action(async (options: ListCommandOptions) => {
-      const docs = await listPrds(options.project);
+      const docs = await serviceFor(options.project).list();
       console.log(JSON.stringify(docs, null, 2));
     });
 
@@ -75,20 +90,65 @@ export function buildPrdyCli(): Command {
     .requiredOption('--project <path>', 'Project path')
     .option('--id <id>', 'PRD document id')
     .action(async (options: ShowCommandOptions) => {
-      if (options.id !== undefined) {
+      const doc = await serviceFor(options.project).get(options.id);
-        const docs = await listPrds(options.project);
+      console.log(JSON.stringify(doc, null, 2));
-        const match = docs.find((doc) => doc.id === options.id);
+    });
 
-        if (match === undefined) {
+  prdy
-          throw new Error(`PRD id not found: ${options.id}`);
+    .command('import')
-        }
+    .description('Import a YAML PRD document (validated; conflicts propose a successor)')
+    .requiredOption('--project <path>', 'Project path')
+    .requiredOption('--file <file>', 'Path to YAML PRD document')
+    .option('--accept-successor', 'Accept a conflicted import as the next version')
+    .action(async (options: ImportCommandOptions) => {
+      const service = serviceFor(options.project);
+      const input = { filePath: options.file };
 
-        console.log(JSON.stringify(match, null, 2));
+      if (options.acceptSuccessor) {
+        const successor = await service.acceptSuccessor(input);
+        console.log(
+          JSON.stringify(
+            {
+              ok: true,
+              outcome: 'successor-accepted',
+              id: successor.id,
+              version: successor.version,
+            },
+            null,
+            2,
+          ),
+        );
         return;
       }
 
-      const doc = await loadPrd(options.project);
+      const result = await service.importDocument(input);
-      console.log(JSON.stringify(doc, null, 2));
+      console.log(
+        JSON.stringify(
+          {
+            ok: true,
+            outcome: result.kind,
+            id: result.document.id,
+            version: result.document.version,
+            status: result.document.status,
+          },
+          null,
+          2,
+        ),
+      );
+    });
+
+  prdy
+    .command('export')
+    .description('Render a PRD to a labeled generated-view Markdown file')
+    .requiredOption('--project <path>', 'Project path')
+    .option('--id <id>', 'PRD document id')
+    .option('--out <path>', 'Output path (default docs/prdy/<id>.md)')
+    .action(async (options: ExportCommandOptions) => {
+      const result = await serviceFor(options.project).exportMarkdown({
+        id: options.id,
+        outPath: options.out,
+      });
+      console.log(JSON.stringify({ ok: true, filePath: result.filePath }, null, 2));
     });
 
   return program;

packages/prdy/src/index.ts

@@ -1,12 +1,35 @@
-export { createPrd, loadPrd, savePrd, listPrds } from './prd.js';
+// PrdService is the single authority surface for PRD documents. The raw store
+// writers (createPrd/savePrd) are deliberately NOT exported: every mutation
+// goes through the service so there is no second writer path.
+export { loadPrd, listPrds, parsePrdDocument } from './prd.js';
 export { runPrdWizard } from './wizard.js';
 export { buildPrdyCli, runPrdyCli } from './cli.js';
 export { BUILTIN_PRD_TEMPLATES, resolveTemplate } from './templates.js';
+export {
+  PrdService,
+  PRD_GENERATED_VIEW_LABEL,
+  PrdError,
+  PrdNotFoundError,
+  PrdUpdateError,
+  PrdImportInvalidError,
+  PrdImportConflictError,
+} from './service.js';
 export type {
   PrdStatus,
   PrdTemplate,
   PrdTemplateSection,
   PrdSection,
+  PrdMissionLinkage,
   PrdDocument,
   CreatePrdOptions,
+  PrdServiceOptions,
+  PrdCreateInput,
+  PrdSectionPatch,
+  PrdUpdateInput,
+  PrdLinkMissionInput,
+  PrdPlanForMissionInput,
+  PrdExportInput,
+  PrdExportResult,
+  PrdImportInput,
+  PrdImportResult,
 } from './types.js';

packages/prdy/src/prd.ts

@@ -17,17 +17,49 @@ const prdSectionSchema = z.object({
   fields: z.record(z.string(), z.string()),
 });
 
+const prdMissionLinkageSchema = z.object({
+  missionId: z.string().min(1),
+  missionVersion: z.string().min(1),
+  prdVersion: z.number().int().min(1),
+  requirementIds: z.array(z.string()),
+  linkedAt: z.string().datetime(),
+});
+
 const prdDocumentSchema = z.object({
   id: z.string().min(1),
   title: z.string().min(1),
   status: z.enum(['draft', 'review', 'approved', 'archived']),
   projectPath: z.string().min(1),
   template: z.string().min(1),
+  // Defaults keep documents written by older prdy versions loadable.
+  version: z.number().int().min(1).default(1),
   sections: z.array(prdSectionSchema),
+  missions: z.array(prdMissionLinkageSchema).default([]),
   createdAt: z.string().datetime(),
   updatedAt: z.string().datetime(),
 });
 
+/** YAML timestamp scalars are parsed as Date by some emitters — normalize to ISO strings. */
+function coerceTimestamps(value: unknown): unknown {
+  if (value instanceof Date) {
+    return value.toISOString();
+  }
+  if (Array.isArray(value)) {
+    return value.map(coerceTimestamps);
+  }
+  if (typeof value === 'object' && value !== null) {
+    return Object.fromEntries(
+      Object.entries(value).map(([key, entry]) => [key, coerceTimestamps(entry)]),
+    );
+  }
+  return value;
+}
+
+/** Validate an unknown value as a PRD document (throws zod errors on failure). */
+export function parsePrdDocument(value: unknown): PrdDocument {
+  return prdDocumentSchema.parse(coerceTimestamps(value)) as PrdDocument;
+}
+
 function expandHome(projectPath: string): string {
   if (!projectPath.startsWith('~')) {
     return projectPath;
@@ -74,6 +106,8 @@ function prdDirectory(projectPath: string): string {
   return path.join(projectPath, PRD_DIRECTORY);
 }
 
+export { prdDirectory };
+
 function prdFilePath(projectPath: string, id: string): string {
   return path.join(prdDirectory(projectPath), `${id}.yaml`);
 }
@@ -113,11 +147,13 @@ export async function createPrd(options: CreatePrdOptions): Promise<PrdDocument>
     status: 'draft',
     projectPath: resolvedProjectPath,
     template: template.id,
+    version: 1,
     sections: template.sections.map((section) => ({
       id: section.id,
       title: section.title,
       fields: Object.fromEntries(section.fields.map((field) => [field, ''])),
     })),
+    missions: [],
     createdAt: now,
     updatedAt: now,
   };
@@ -190,7 +226,7 @@ export async function listPrds(projectPath: string): Promise<PrdDocument[]> {
       throw new Error(`Failed to parse PRD file ${filePath}: ${String(error)}`);
     }
 
-    const document = prdDocumentSchema.parse(parsed);
+    const document = parsePrdDocument(parsed);
     documents.push(document);
   }
 

packages/prdy/src/service.spec.ts

@@ -0,0 +1,433 @@
+import { existsSync } from 'node:fs';
+import { mkdtemp, readFile, readdir, writeFile } from 'node:fs/promises';
+import os from 'node:os';
+import path from 'node:path';
+
+import yaml from 'js-yaml';
+import { beforeEach, describe, expect, it } from 'vitest';
+
+import {
+  PRD_GENERATED_VIEW_LABEL,
+  PrdImportConflictError,
+  PrdImportInvalidError,
+  PrdNotFoundError,
+  PrdService,
+  PrdUpdateError,
+} from './index.js';
+import type { PrdDocument } from './index.js';
+
+// ── Helpers ──────────────────────────────────────────────────────────────────
+
+let projectDir: string;
+
+async function makeProject(): Promise<string> {
+  return mkdtemp(path.join(os.tmpdir(), 'prdy-service-'));
+}
+
+function service(): PrdService {
+  return new PrdService({ projectPath: projectDir });
+}
+
+function storeDir(): string {
+  return path.join(projectDir, 'docs', 'prdy');
+}
+
+/** Handcraft a full, schema-valid PRD document for import scenarios. */
+function importFixture(overrides: Partial<PrdDocument> = {}): PrdDocument {
+  return {
+    id: 'imported-prd-20260101-000000',
+    title: 'Imported PRD',
+    status: 'draft',
+    projectPath: '/tmp/elsewhere',
+    template: 'software',
+    version: 1,
+    sections: [
+      { id: 'introduction', title: 'Introduction', fields: { context: '', objective: '' } },
+      {
+        id: 'scope-non-goals',
+        title: 'Scope / Non-Goals',
+        fields: { inScope: '', outOfScope: '' },
+      },
+    ],
+    missions: [],
+    createdAt: '2026-01-01T00:00:00.000Z',
+    updatedAt: '2026-01-01T00:00:00.000Z',
+    ...overrides,
+  };
+}
+
+async function writeImportFile(doc: PrdDocument): Promise<string> {
+  const filePath = path.join(projectDir, `${doc.id}.import.yaml`);
+  await writeFile(filePath, yaml.dump(doc), 'utf8');
+  return filePath;
+}
+
+beforeEach(async () => {
+  projectDir = await makeProject();
+});
+
+// ── Single authority store (AC: prdy path and mission path resolve to the
+//    SAME store under docs/prdy/ with stable ids/versions) ────────────────────
+
+describe('PrdService single authority store', () => {
+  it('persists PRDs from the prdy path and the mission path into the same docs/prdy store', async () => {
+    const direct = await service().create({ name: 'Direct PRD' });
+    const viaMission = await service().planForMission({
+      name: 'Mission PRD',
+      missionId: 'mission-1',
+      missionVersion: '2026-01-01T00:00:00.000Z',
+    });
+
+    const files = await readdir(storeDir());
+    expect(files).toContain(`${direct.id}.yaml`);
+    expect(files).toContain(`${viaMission.id}.yaml`);
+
+    // A fresh service instance (new process equivalent) resolves both.
+    const all = await service().list();
+    expect(all.map((doc) => doc.id).sort()).toEqual([direct.id, viaMission.id].sort());
+
+    // Stable versions: creation is v1; linkage writes do not bump content version.
+    expect((await service().get(direct.id)).version).toBe(1);
+    expect((await service().get(viaMission.id)).version).toBe(1);
+  });
+
+  it('round-trips documents through the store with identity intact', async () => {
+    const created = await service().create({ name: 'Round Trip', template: 'feature' });
+    const fresh = await service().get(created.id);
+
+    expect(fresh).toEqual(created);
+    expect(fresh.id).toBe(created.id);
+    expect(fresh.template).toBe('feature');
+    expect(fresh.status).toBe('draft');
+  });
+
+  it('throws a typed error for unknown ids and empty stores', async () => {
+    await expect(service().get('nope')).rejects.toBeInstanceOf(PrdNotFoundError);
+    await expect(service().get()).rejects.toBeInstanceOf(PrdNotFoundError);
+  });
+});
+
+// ── Mission linkage persistence (AC: linkage survives restart via fresh
+//    service instances) ────────────────────────────────────────────────────────
+
+describe('PrdService mission linkage', () => {
+  it('persists linkage and reads it back from a fresh service instance', async () => {
+    const created = await service().planForMission({
+      name: 'Linked PRD',
+      missionId: 'mission-42',
+      missionVersion: '2026-02-03T04:05:06.000Z',
+      requirementIds: ['FR-1', 'FR-2'],
+    });
+
+    // Fresh instance — nothing in memory from the creating call.
+    const links = await service().listMissionLinks(created.id);
+    expect(links).toHaveLength(1);
+    expect(links[0]).toMatchObject({
+      missionId: 'mission-42',
+      missionVersion: '2026-02-03T04:05:06.000Z',
+      prdVersion: 1,
+      requirementIds: ['FR-1', 'FR-2'],
+    });
+
+    // Linkage is carried in the YAML authority file itself.
+    const raw = await readFile(path.join(storeDir(), `${created.id}.yaml`), 'utf8');
+    const persisted = yaml.load(raw) as PrdDocument;
+    expect(persisted.missions[0]?.missionId).toBe('mission-42');
+    expect(persisted.missions[0]?.requirementIds).toEqual(['FR-1', 'FR-2']);
+  });
+
+  it('refreshes an existing linkage entry in place instead of duplicating', async () => {
+    const created = await service().planForMission({
+      name: 'Relink PRD',
+      missionId: 'mission-7',
+      missionVersion: 'v1',
+    });
+
+    await service().update({
+      id: created.id,
+      sections: [{ id: 'introduction', fields: { objective: 'Ship it' } }],
+    });
+
+    const relinked = await service().linkMission({
+      prdId: created.id,
+      missionId: 'mission-7',
+      missionVersion: 'v2',
+      requirementIds: ['NFR-1'],
+    });
+
+    expect(relinked.missions).toHaveLength(1);
+    expect(relinked.missions[0]).toMatchObject({ missionVersion: 'v2', prdVersion: 2 });
+  });
+
+  it('does not bump the content version when writing linkage', async () => {
+    const created = await service().create({ name: 'Stable Version' });
+    const linked = await service().linkMission({
+      prdId: created.id,
+      missionId: 'm',
+      missionVersion: 'v1',
+    });
+    expect(linked.version).toBe(1);
+  });
+});
+
+// ── Update semantics ──────────────────────────────────────────────────────────
+
+describe('PrdService update', () => {
+  it('applies section patches and bumps the content version', async () => {
+    const created = await service().create({ name: 'Updatable' });
+    const updated = await service().update({
+      id: created.id,
+      sections: [{ id: 'introduction', fields: { context: 'Some context', objective: 'Goal' } }],
+    });
+
+    expect(updated.version).toBe(2);
+    expect(updated.sections[0]?.fields).toMatchObject({
+      context: 'Some context',
+      objective: 'Goal',
+    });
+    expect((await service().get(created.id)).version).toBe(2);
+  });
+
+  it('refuses unknown section ids with a typed error', async () => {
+    const created = await service().create({ name: 'Strict' });
+    await expect(
+      service().update({ id: created.id, sections: [{ id: 'nope', fields: {} }] }),
+    ).rejects.toBeInstanceOf(PrdUpdateError);
+  });
+});
+
+// ── Markdown export is a labeled generated view, never authority ──────────────
+
+describe('PrdService exportMarkdown', () => {
+  it('writes a generated view carrying the label and source identity', async () => {
+    const created = await service().create({ name: 'Exported PRD' });
+    const result = await service().exportMarkdown({ id: created.id });
+
+    expect(result.filePath).toBe(path.join(storeDir(), `${created.id}.md`));
+    expect(result.content).toContain(PRD_GENERATED_VIEW_LABEL);
+    expect(result.content).toContain(`prd-id: ${created.id}`);
+    expect(result.content).toContain('prd-version: 1');
+    expect(result.content).toContain(`source-of-truth: docs/prdy/${created.id}.yaml`);
+  });
+
+  it('reflects the current version after updates', async () => {
+    const created = await service().create({ name: 'Versioned Export' });
+    await service().update({
+      id: created.id,
+      sections: [{ id: 'introduction', fields: { objective: 'v2 goal' } }],
+    });
+    const result = await service().exportMarkdown({ id: created.id });
+    expect(result.content).toContain('prd-version: 2');
+  });
+
+  it('NEGATIVE CONTROL: mutating the exported Markdown cannot change the authority', async () => {
+    const created = await service().create({ name: 'Guarded PRD' });
+    const before = structuredClone(await service().get(created.id));
+
+    const result = await service().exportMarkdown({ id: created.id });
+    await writeFile(
+      result.filePath,
+      `<!-- ${PRD_GENERATED_VIEW_LABEL} -->\n# FAKE\nprd-id: fake-id\nprd-version: 99\n`,
+      'utf8',
+    );
+
+    const after = await service().get(created.id);
+    expect(after).toEqual(before);
+    expect(after.version).toBe(1);
+    expect(after.title).toBe(before.title);
+  });
+
+  it('never parses Markdown files that sit in the store directory', async () => {
+    const created = await service().create({ name: 'Decoy Guard' });
+
+    // A decoy .md file with invalid YAML must be invisible to the store.
+    await writeFile(path.join(storeDir(), 'decoy.md'), 'not: [valid: yaml', 'utf8');
+    // And a decoy .yaml-named Markdown body must not silently validate either.
+    await service().exportMarkdown({ id: created.id });
+
+    const listed = await service().list();
+    expect(listed.map((doc) => doc.id)).toEqual([created.id]);
+    await expect(service().get(created.id)).resolves.toBeTruthy();
+  });
+});
+
+// ── Import: validated, conflict-aware, never silently merging ─────────────────
+
+describe('PrdService importDocument', () => {
+  it('creates a valid import through the service, as draft — validity is not approval', async () => {
+    const filePath = await writeImportFile(importFixture({ status: 'approved' }));
+
+    const result = await service().importDocument({ filePath });
+
+    expect(result.kind).toBe('created');
+    expect(result.document.id).toBe('imported-prd-20260101-000000');
+    expect(result.document.status).toBe('draft'); // structural validity ≠ approval
+    expect(result.document.version).toBe(1);
+
+    const persisted = await service().get('imported-prd-20260101-000000');
+    expect(persisted.status).toBe('draft');
+
+    const files = await readdir(storeDir());
+    expect(files).toContain('imported-prd-20260101-000000.yaml');
+  });
+
+  it('reports identical content as a no-op without writing', async () => {
+    const created = await service().create({ name: 'Existing PRD' });
+    const before = await readFile(path.join(storeDir(), `${created.id}.yaml`), 'utf8');
+
+    const filePath = await writeImportFile(importFixture({ ...created }));
+    const result = await service().importDocument({ filePath });
+
+    expect(result.kind).toBe('identical');
+    const after = await readFile(path.join(storeDir(), `${created.id}.yaml`), 'utf8');
+    expect(after).toBe(before);
+  });
+
+  it('refuses a conflicting import with a typed error, a proposed successor, and untouched bytes', async () => {
+    const existing = await service().create({ name: 'Authority PRD' });
+    await service().linkMission({
+      prdId: existing.id,
+      missionId: 'mission-keep',
+      missionVersion: 'v1',
+      requirementIds: ['FR-0'],
+    });
+    const beforeBytes = await readFile(path.join(storeDir(), `${existing.id}.yaml`), 'utf8');
+
+    const divergent = importFixture({
+      ...existing,
+      title: 'Divergent Title',
+      sections: [
+        {
+          id: 'introduction',
+          title: 'Introduction',
+          fields: { context: 'changed', objective: '' },
+        },
+      ],
+    });
+    const filePath = await writeImportFile(divergent);
+
+    const attempt = service().importDocument({ filePath });
+    let caught: unknown;
+    try {
+      await attempt;
+    } catch (error) {
+      caught = error;
+    }
+    expect(caught).toBeInstanceOf(PrdImportConflictError);
+
+    const error = caught as PrdImportConflictError;
+    expect(error.code).toBe('PRD_IMPORT_CONFLICT');
+    expect(error.existing.id).toBe(existing.id);
+    expect(error.proposal.version).toBe(existing.version + 1); // successor proposal
+    expect(error.proposal.status).toBe('draft');
+
+    // Original authority content untouched on disk.
+    const afterBytes = await readFile(path.join(storeDir(), `${existing.id}.yaml`), 'utf8');
+    expect(afterBytes).toBe(beforeBytes);
+  });
+
+  it('acceptSuccessor persists the proposal explicitly, carrying linkages forward', async () => {
+    const existing = await service().create({ name: 'Successor Base' });
+    await service().linkMission({
+      prdId: existing.id,
+      missionId: 'mission-keep',
+      missionVersion: 'v1',
+    });
+
+    const divergent = importFixture({
+      ...existing,
+      title: 'Accepted Successor Title',
+    });
+    const filePath = await writeImportFile(divergent);
+
+    const successor = await service().acceptSuccessor({ filePath });
+    expect(successor.id).toBe(existing.id);
+    expect(successor.version).toBe(existing.version + 1);
+    expect(successor.title).toBe('Accepted Successor Title');
+    expect(successor.status).toBe('draft');
+    expect(successor.missions.map((m) => m.missionId)).toEqual(['mission-keep']);
+
+    // Persisted for a fresh reader.
+    const fresh = await service().get(existing.id);
+    expect(fresh.version).toBe(2);
+    expect(fresh.title).toBe('Accepted Successor Title');
+  });
+
+  it('refuses structurally-invalid imports with a typed error and creates nothing', async () => {
+    const cases: Array<{ name: string; body: string }> = [
+      { name: 'missing-title.yaml', body: yaml.dump({ id: 'x', status: 'draft' }) },
+      {
+        name: 'bad-status.yaml',
+        body: yaml.dump(importFixture({ status: 'not-a-status' as PrdDocument['status'] })),
+      },
+      {
+        name: 'bad-version.yaml',
+        body: yaml.dump(importFixture({ version: 0 })),
+      },
+      { name: 'not-yaml.yaml', body: '::: not yaml [\n  - {' },
+    ];
+
+    for (const fixture of cases) {
+      const filePath = path.join(projectDir, fixture.name);
+      await writeFile(filePath, fixture.body, 'utf8');
+
+      await expect(service().importDocument({ filePath })).rejects.toBeInstanceOf(
+        PrdImportInvalidError,
+      );
+    }
+
+    // Nothing was created: the authority store does not even exist yet.
+    await expect(readdir(storeDir())).rejects.toMatchObject({ code: 'ENOENT' });
+  });
+
+  it('acceptSuccessor refuses when there is no existing document to succeed', async () => {
+    const filePath = await writeImportFile(importFixture());
+    await expect(service().acceptSuccessor({ filePath })).rejects.toBeInstanceOf(PrdNotFoundError);
+  });
+});
+
+// ── No second writer: no code path reads exported Markdown back into authority ─
+
+describe('no-second-writer invariant (source-level)', () => {
+  // Resolve the package source dir whether vitest runs from the package root
+  // (turbo/pnpm test) or from the worktree root.
+  function resolveSrcDir(): string {
+    const candidates = [path.resolve('src'), path.resolve('packages/prdy/src')];
+    return candidates.find((dir) => existsSync(path.join(dir, 'service.ts'))) ?? candidates[0]!;
+  }
+
+  const srcDir = resolveSrcDir();
+  const sourceFiles = [
+    'cli.ts',
+    'index.ts',
+    'prd.ts',
+    'service.ts',
+    'templates.ts',
+    'types.ts',
+    'wizard.ts',
+  ];
+
+  it('no source file in @mosaicstack/prdy reads a .md file', async () => {
+    for (const file of sourceFiles) {
+      const text = await readFile(path.join(srcDir, file), 'utf8');
+      const readLines = text
+        .split('\n')
+        .map((line) => line.trim())
+        .filter((line) => /readFile|readFileSync|createReadStream/.test(line));
+
+      for (const line of readLines) {
+        expect(line.includes('.md'), `${file} reads a Markdown file: ${line}`).toBe(false);
+      }
+    }
+  });
+
+  it('the mosaic prdy/mission adapters never read a .md file', async () => {
+    const adapterDir = path.resolve(srcDir, '..', '..', 'mosaic', 'src', 'commands');
+    for (const file of ['prdy.ts', 'mission.ts']) {
+      const text = await readFile(path.join(adapterDir, file), 'utf8');
+      expect(text.includes("'.md'") || text.includes('.md`'), `${file} references a .md path`).toBe(
+        false,
+      );
+    }
+  });
+});

packages/prdy/src/service.ts

@@ -0,0 +1,379 @@
+import { promises as fs } from 'node:fs';
+import path from 'node:path';
+
+import yaml from 'js-yaml';
+
+import { createPrd, listPrds, parsePrdDocument, prdDirectory, savePrd } from './prd.js';
+import type {
+  PrdCreateInput,
+  PrdDocument,
+  PrdExportInput,
+  PrdExportResult,
+  PrdImportInput,
+  PrdImportResult,
+  PrdLinkMissionInput,
+  PrdMissionLinkage,
+  PrdPlanForMissionInput,
+  PrdServiceOptions,
+  PrdUpdateInput,
+} from './types.js';
+
+/**
+ * PrdService is the SINGLE authority surface for PRD documents.
+ *
+ * Every mutation path (CLI wizard, `mosaic mission --plan`, import) routes
+ * through this service; the YAML store under `docs/prdy/` is the authority and
+ * exported Markdown is a generated view that no code path reads back.
+ */
+
+// ── Typed errors ───────────────────────────────────────────────────────────────
+
+export class PrdError extends Error {
+  constructor(
+    message: string,
+    readonly code: string,
+  ) {
+    super(message);
+    this.name = 'PrdError';
+  }
+}
+
+export class PrdNotFoundError extends PrdError {
+  constructor(message: string) {
+    super(message, 'PRD_NOT_FOUND');
+    this.name = 'PrdNotFoundError';
+  }
+}
+
+export class PrdUpdateError extends PrdError {
+  constructor(message: string) {
+    super(message, 'PRD_UPDATE_INVALID');
+    this.name = 'PrdUpdateError';
+  }
+}
+
+/** Structural refusal: the import payload failed schema validation. Nothing is written. */
+export class PrdImportInvalidError extends PrdError {
+  constructor(
+    message: string,
+    readonly issues?: string,
+  ) {
+    super(message, 'PRD_IMPORT_INVALID');
+    this.name = 'PrdImportInvalidError';
+  }
+}
+
+/**
+ * Conflict refusal: an existing PRD shares the imported id but the content
+ * diverges. Carries a PROPOSED successor (existing version + 1) that is only
+ * persisted via an explicit {@link PrdService.acceptSuccessor} call — import
+ * never overwrites and never merges.
+ */
+export class PrdImportConflictError extends PrdError {
+  constructor(
+    message: string,
+    readonly existing: PrdDocument,
+    readonly proposal: PrdDocument,
+  ) {
+    super(message, 'PRD_IMPORT_CONFLICT');
+    this.name = 'PrdImportConflictError';
+  }
+}
+
+// ── Service ────────────────────────────────────────────────────────────────────
+
+/** The generated-view label carried by every Markdown export. */
+export const PRD_GENERATED_VIEW_LABEL = 'generated view — do not edit';
+
+export class PrdService {
+  private readonly projectPath: string;
+
+  constructor(options: PrdServiceOptions) {
+    this.projectPath = options.projectPath;
+  }
+
+  /** Create a new PRD (version 1, draft) in the authority store. */
+  async create(input: PrdCreateInput): Promise<PrdDocument> {
+    return createPrd({
+      name: input.name,
+      projectPath: this.projectPath,
+      template: input.template,
+      interactive: false,
+    });
+  }
+
+  /** Read a PRD by id, or the most recently updated one. */
+  async get(id?: string): Promise<PrdDocument> {
+    const documents = await listPrds(this.projectPath);
+
+    if (id === undefined) {
+      const latest = documents[0];
+      if (latest === undefined) {
+        throw new PrdNotFoundError(`No PRD documents found under docs/prdy/ for this project`);
+      }
+      return latest;
+    }
+
+    const match = documents.find((doc) => doc.id === id);
+    if (match === undefined) {
+      throw new PrdNotFoundError(`PRD id not found: ${id}`);
+    }
+    return match;
+  }
+
+  /** List all PRDs in the authority store (most recently updated first). */
+  async list(): Promise<PrdDocument[]> {
+    return listPrds(this.projectPath);
+  }
+
+  /**
+   * Apply section field patches and bump the content version.
+   * Linkage entries are preserved; linkage writes do NOT bump the version.
+   */
+  async update(input: PrdUpdateInput): Promise<PrdDocument> {
+    const doc = await this.get(input.id);
+
+    for (const patch of input.sections) {
+      const section = doc.sections.find((candidate) => candidate.id === patch.id);
+      if (section === undefined) {
+        throw new PrdUpdateError(`Unknown section id: ${patch.id}`);
+      }
+      for (const [field, value] of Object.entries(patch.fields)) {
+        if (!(field in section.fields)) {
+          throw new PrdUpdateError(`Unknown field "${field}" on section "${patch.id}"`);
+        }
+        section.fields[field] = value;
+      }
+    }
+
+    doc.version += 1;
+    doc.updatedAt = new Date().toISOString();
+    await savePrd(doc);
+    return doc;
+  }
+
+  /**
+   * Record (or refresh) a mission ↔ PRD linkage on the PRD document.
+   * Persisted in the YAML authority, so it survives restarts.
+   */
+  async linkMission(input: PrdLinkMissionInput): Promise<PrdDocument> {
+    const doc = await this.get(input.prdId);
+    return this.applyLinkage(doc, input);
+  }
+
+  /** Read back the mission linkages recorded on a PRD. */
+  async listMissionLinks(prdId?: string): Promise<PrdMissionLinkage[]> {
+    const doc = await this.get(prdId);
+    return doc.missions;
+  }
+
+  /**
+   * Mission planning path: create a PRD for a mission AND persist the
+   * mission↔PRD linkage in a single authority write.
+   */
+  async planForMission(input: PrdPlanForMissionInput): Promise<PrdDocument> {
+    const doc = await this.create({ name: input.name, template: input.template });
+    return this.applyLinkage(doc, {
+      prdId: doc.id,
+      missionId: input.missionId,
+      missionVersion: input.missionVersion,
+      requirementIds: input.requirementIds,
+    });
+  }
+
+  /**
+   * Render the PRD to a Markdown GENERATED VIEW.
+   *
+   * The output carries source identity (PRD id + version + generated-view
+   * label). It is written under `docs/prdy/<id>.md` and is NEVER read back:
+   * the authority store only loads `.yaml`/`.yml` files, and no code path in
+   * this package parses the exported Markdown.
+   */
+  async exportMarkdown(input?: PrdExportInput): Promise<PrdExportResult> {
+    const doc = await this.get(input?.id);
+    const content = renderMarkdown(doc);
+    const filePath = input?.outPath ?? path.join(prdDirectory(doc.projectPath), `${doc.id}.md`);
+
+    await fs.mkdir(path.dirname(filePath), { recursive: true });
+    await fs.writeFile(filePath, content, 'utf8');
+    return { filePath, content };
+  }
+
+  /**
+   * Import a YAML PRD document.
+   *
+   * Structural validation (zod) happens BEFORE anything is proposed or
+   * written. A structurally-valid import is persisted as `draft` — validity is
+   * NOT approval. If an existing PRD shares the id with divergent content, a
+   * typed {@link PrdImportConflictError} is thrown carrying a proposed
+   * successor; the original authority document is left byte-identical on disk.
+   */
+  async importDocument(input: PrdImportInput): Promise<PrdImportResult> {
+    const incoming = await this.readImportFile(input.filePath);
+
+    const existing = (await listPrds(this.projectPath)).find((doc) => doc.id === incoming.id);
+    if (existing === undefined) {
+      const document = this.buildImportedDocument(incoming);
+      await savePrd(document);
+      return { kind: 'created', document };
+    }
+
+    if (canonicalCore(existing) === canonicalCore(incoming)) {
+      return { kind: 'identical', document: existing };
+    }
+
+    throw new PrdImportConflictError(
+      `PRD id "${incoming.id}" already exists with divergent content — refusing to overwrite. ` +
+        `Proposed successor: version ${existing.version + 1} (draft). ` +
+        `Accept explicitly with acceptSuccessor().`,
+      existing,
+      this.buildSuccessor(existing, incoming),
+    );
+  }
+
+  /**
+   * Explicitly accept a conflicted import as a successor version of the
+   * existing PRD. Re-validates the source file before writing; the successor
+   * is persisted with status `draft` (acceptance of the import is not approval
+   * of the PRD) and the existing mission linkages are carried forward.
+   */
+  async acceptSuccessor(input: PrdImportInput): Promise<PrdDocument> {
+    const incoming = await this.readImportFile(input.filePath);
+
+    const existing = (await listPrds(this.projectPath)).find((doc) => doc.id === incoming.id);
+    if (existing === undefined) {
+      throw new PrdNotFoundError(
+        `No existing PRD with id "${incoming.id}" — use importDocument to create it`,
+      );
+    }
+
+    const successor = this.buildSuccessor(existing, incoming);
+    await savePrd(successor);
+    return successor;
+  }
+
+  // ── internals ──────────────────────────────────────────────────────────────
+
+  private async applyLinkage(doc: PrdDocument, input: PrdLinkMissionInput): Promise<PrdDocument> {
+    const entry: PrdMissionLinkage = {
+      missionId: input.missionId,
+      missionVersion: input.missionVersion,
+      prdVersion: doc.version,
+      requirementIds: input.requirementIds ?? [],
+      linkedAt: new Date().toISOString(),
+    };
+
+    // One entry per mission: refresh in place if the mission is already linked.
+    const index = doc.missions.findIndex((m) => m.missionId === entry.missionId);
+    if (index === -1) {
+      doc.missions.push(entry);
+    } else {
+      doc.missions[index] = entry;
+    }
+
+    // Linkage is mission-side metadata, not a content revision: bump the
+    // timestamp only so ids/versions stay stable for consumers.
+    doc.updatedAt = new Date().toISOString();
+    await savePrd(doc);
+    return doc;
+  }
+
+  private async readImportFile(filePath: string): Promise<PrdDocument> {
+    let raw: string;
+    try {
+      raw = await fs.readFile(filePath, 'utf8');
+    } catch (error) {
+      throw new PrdImportInvalidError(`Cannot read import file ${filePath}: ${String(error)}`);
+    }
+
+    let parsed: unknown;
+    try {
+      parsed = yaml.load(raw);
+    } catch (error) {
+      throw new PrdImportInvalidError(`Import file is not valid YAML: ${String(error)}`);
+    }
+
+    try {
+      return parsePrdDocument(parsed);
+    } catch (error) {
+      throw new PrdImportInvalidError(
+        `Import file failed PRD schema validation: ${filePath}`,
+        error instanceof Error ? error.message : String(error),
+      );
+    }
+  }
+
+  private buildImportedDocument(incoming: PrdDocument): PrdDocument {
+    const now = new Date().toISOString();
+    return {
+      ...incoming,
+      // The import lands in THIS project's authority store.
+      projectPath: this.projectPath,
+      // A structurally-valid import is not thereby approved.
+      status: 'draft',
+      version: 1,
+      missions: [],
+      createdAt: now,
+      updatedAt: now,
+    };
+  }
+
+  private buildSuccessor(existing: PrdDocument, incoming: PrdDocument): PrdDocument {
+    return {
+      ...incoming,
+      id: existing.id,
+      projectPath: existing.projectPath,
+      status: 'draft',
+      version: existing.version + 1,
+      missions: existing.missions,
+      createdAt: existing.createdAt,
+      updatedAt: new Date().toISOString(),
+    };
+  }
+}
+
+// ── Markdown rendering (generated view) ───────────────────────────────────────
+
+function canonicalCore(doc: PrdDocument): string {
+  return JSON.stringify([doc.title, doc.template, doc.sections]);
+}
+
+function renderMarkdown(doc: PrdDocument): string {
+  const lines: string[] = [
+    '<!--',
+    `${PRD_GENERATED_VIEW_LABEL}`,
+    `source-of-truth: docs/prdy/${doc.id}.yaml (YAML authority)`,
+    `prd-id: ${doc.id}`,
+    `prd-version: ${doc.version}`,
+    `generated-at: ${new Date().toISOString()}`,
+    '-->',
+    '',
+    `# ${doc.title}`,
+    '',
+    `**Status:** ${doc.status} · **Version:** ${doc.version} · **Template:** ${doc.template}`,
+    '',
+  ];
+
+  if (doc.missions.length > 0) {
+    lines.push('## Mission Linkage', '');
+    for (const mission of doc.missions) {
+      const requirements =
+        mission.requirementIds.length > 0 ? mission.requirementIds.join(', ') : 'none selected';
+      lines.push(
+        `- mission \`${mission.missionId}\` @ version \`${mission.missionVersion}\`` +
+          ` (linked at PRD v${mission.prdVersion}) — requirements: ${requirements}`,
+      );
+    }
+    lines.push('');
+  }
+
+  for (const section of doc.sections) {
+    lines.push(`## ${section.title}`, '');
+    for (const [field, value] of Object.entries(section.fields)) {
+      lines.push(`### ${field}`, '', value.trim().length > 0 ? value : '_Not set_.', '');
+    }
+  }
+
+  lines.push('---', '', `_End of generated view for ${doc.id} v${doc.version}._`, '');
+  return lines.join('\n');
+}

packages/prdy/src/types.ts

@@ -19,13 +19,31 @@ export interface PrdSection {
   fields: Record<string, string>;
 }
 
+/**
+ * Mission ↔ PRD linkage recorded on the PRD document (the YAML authority).
+ *
+ * `missionVersion` is the mission-side revision marker available to the CLI
+ * (the gateway exposes `updatedAt` for missions — there is no numeric mission
+ * version yet). `prdVersion` snapshots the PRD content version at link time.
+ */
+export interface PrdMissionLinkage {
+  missionId: string;
+  missionVersion: string;
+  prdVersion: number;
+  requirementIds: string[];
+  linkedAt: string;
+}
+
 export interface PrdDocument {
   id: string;
   title: string;
   status: PrdStatus;
   projectPath: string;
   template: string;
+  /** Content revision counter. Bumped by updates and accepted imports. */
+  version: number;
   sections: PrdSection[];
+  missions: PrdMissionLinkage[];
   createdAt: string;
   updatedAt: string;
 }
@@ -36,3 +54,60 @@ export interface CreatePrdOptions {
   template?: string;
   interactive?: boolean;
 }
+
+// ── PrdService surface (single authority entry point) ─────────────────────────
+
+export interface PrdServiceOptions {
+  projectPath: string;
+}
+
+export interface PrdCreateInput {
+  name: string;
+  template?: string;
+}
+
+export interface PrdSectionPatch {
+  id: string;
+  fields: Record<string, string>;
+}
+
+export interface PrdUpdateInput {
+  /** Defaults to the most recently updated PRD. */
+  id?: string;
+  sections: PrdSectionPatch[];
+}
+
+export interface PrdLinkMissionInput {
+  /** Defaults to the most recently updated PRD. */
+  prdId?: string;
+  missionId: string;
+  missionVersion: string;
+  requirementIds?: string[];
+}
+
+export interface PrdPlanForMissionInput extends PrdLinkMissionInput {
+  name: string;
+  template?: string;
+}
+
+export interface PrdExportInput {
+  /** Defaults to the most recently updated PRD. */
+  id?: string;
+  /** Override the generated-view output path. */
+  outPath?: string;
+}
+
+export interface PrdExportResult {
+  filePath: string;
+  content: string;
+}
+
+/** Discriminated result of a non-conflicting import. */
+export type PrdImportResult =
+  | { kind: 'created'; document: PrdDocument }
+  | { kind: 'identical'; document: PrdDocument };
+
+export interface PrdImportInput {
+  /** Path to a YAML-serialized PRD document (NOT the generated Markdown view). */
+  filePath: string;
+}

packages/prdy/src/wizard.ts

@@ -2,8 +2,8 @@ import path from 'node:path';
 
 import { cancel, intro, isCancel, outro, select, text } from '@clack/prompts';
 
-import { createPrd, savePrd } from './prd.js';
+import { PrdService } from './service.js';
-import type { CreatePrdOptions, PrdDocument } from './types.js';
+import type { CreatePrdOptions, PrdDocument, PrdSectionPatch } from './types.js';
 
 interface WizardAnswers {
   goals: string;
@@ -11,20 +11,41 @@ interface WizardAnswers {
   milestones: string;
 }
 
-function updateSectionField(doc: PrdDocument, sectionKeyword: string, value: string): void {
+/**
-  const section = doc.sections.find((candidate) => candidate.id.includes(sectionKeyword));
+ * Translate wizard answers into section patches using the same keyword
+ * matching the wizard always used (first section whose id contains the
+ * keyword, then first field whose name contains it, else first field).
+ */
+function buildWizardPatches(doc: PrdDocument, answers: WizardAnswers): PrdSectionPatch[] {
+  const bySection = new Map<string, PrdSectionPatch>();
 
-  if (section === undefined) {
+  const add = (keyword: string, value: string): void => {
-    return;
+    const section = doc.sections.find((candidate) => candidate.id.includes(keyword));
-  }
+    if (section === undefined) {
+      return;
+    }
 
-  const fieldName =
+    const fieldName =
-    Object.keys(section.fields).find((field) => field.toLowerCase().includes(sectionKeyword)) ??
+      Object.keys(section.fields).find((field) => field.toLowerCase().includes(keyword)) ??
-    Object.keys(section.fields)[0];
+      Object.keys(section.fields)[0];
 
-  if (fieldName !== undefined) {
+    if (fieldName === undefined || section.fields[fieldName] === value) {
-    section.fields[fieldName] = value;
+      return;
-  }
+    }
+
+    const existing = bySection.get(section.id);
+    if (existing === undefined) {
+      bySection.set(section.id, { id: section.id, fields: { [fieldName]: value } });
+    } else {
+      existing.fields[fieldName] = value;
+    }
+  };
+
+  add('goal', answers.goals);
+  add('constraint', answers.constraints);
+  add('milestone', answers.milestones);
+
+  return [...bySection.values()];
 }
 
 async function promptText(message: string, initialValue = ''): Promise<string> {
@@ -63,15 +84,10 @@ async function promptTemplate(template?: string): Promise<string> {
   return choice;
 }
 
-function applyWizardAnswers(doc: PrdDocument, answers: WizardAnswers): PrdDocument {
+/**
-  updateSectionField(doc, 'goal', answers.goals);
+ * Interactive PRD wizard. All writes go through PrdService — the wizard is a
-  updateSectionField(doc, 'constraint', answers.constraints);
+ * prompt layer, never a second writer path.
-  updateSectionField(doc, 'milestone', answers.milestones);
+ */
-
-  doc.updatedAt = new Date().toISOString();
-  return doc;
-}
-
 export async function runPrdWizard(options: CreatePrdOptions): Promise<PrdDocument> {
   intro('Mosaic PRD wizard');
 
@@ -82,20 +98,15 @@ export async function runPrdWizard(options: CreatePrdOptions): Promise<PrdDocume
   const constraints = await promptText('Key constraints');
   const milestones = await promptText('Planned milestones');
 
-  const doc = await createPrd({
+  const service = new PrdService({ projectPath: options.projectPath });
-    ...options,
+  const doc = await service.create({
     name,
     template,
-    interactive: true,
   });
 
-  const updated = applyWizardAnswers(doc, {
+  const patches = buildWizardPatches(doc, { goals, constraints, milestones });
-    goals,
+  const updated =
-    constraints,
+    patches.length > 0 ? await service.update({ id: doc.id, sections: patches }) : doc;
-    milestones,
-  });
-
-  await savePrd(updated);
 
   outro(`PRD created: ${path.join(updated.projectPath, 'docs', 'prdy', `${updated.id}.yaml`)}`);
 

scratchpads/ri-4-001-prd-authority.md

@@ -0,0 +1,37 @@
+# Scratchpad — RI-4-001 One transitional PRD authority (RI-N3, #1275)
+
+- Objective: single PrdService authority in `@mosaicstack/prdy`; `mosaic prdy` and
+  `mission --plan` become thin adapters; mission↔PRD linkage persisted on disk;
+  Markdown export is a labeled generated view (never read back); import is
+  validated/conflict-aware with typed refusals.
+- Budget: ~35K tokens (card cap). Baselines: prdy build/lint rc=0, 0 tests;
+  mosaic build rc=0 (after root turbo build), lint rc=0, 1548 tests pass;
+  root build rc=0.
+- Plan: (1) extend store schema (version, missions linkage) (2) PrdService +
+  typed errors (3) wizard/cli route through service (4) mosaic adapters
+  (5) contract specs both packages (6) gates (7) sabotage control (8) report
+  to /var/tmp/ri-050/ri-4-001-report.md.
+- Decisions:
+  - Linkage lives ON the PRD document (`missions` array) — one authority file,
+    survives restart, no sidecar sync problems.
+  - `version` = content revision of sections/status (bumped by update/import
+    accept). Linkage writes bump `updatedAt` only, so ids/versions stay stable
+    for the card's "stable ids/versions" contract.
+  - Mission version marker = `mission.updatedAt` (gateway MissionInfo has no
+    numeric version field).
+  - Import reads YAML documents only — never the exported Markdown (keeps the
+    "no code path reads exported Markdown" invariant).
+  - Import of an existing id with identical core content → `identical` no-op;
+    divergent → typed `PrdImportConflictError` carrying proposed successor
+    (existing.version + 1, status draft, linkages preserved). Original bytes
+    untouched until explicit `acceptSuccessor`.
+  - `requirementIds` default `[]` at the mission command (no requirement
+    selection UI yet) — service accepts ids when a caller has them.
+- Progress log:
+  - [16:35] baselines captured (prdy 0 tests; mosaic 1548 after root build; root build rc=0)
+  - [16:38] store schema v2 + PrdService + wizard/cli rerouted; prdy build/lint green
+  - [16:40] mosaic adapters done; prdy spec 20/20 (found+fixed: import project-path leak, empty-store typed error, YAML timestamp coercion)
+  - [16:44] mosaic specs 9/9 (fixed commander from:'user' argv, vi.mock hoisting, restoreAllMocks wiping factory mocks)
+  - [16:45] all gates green; 4 commits (e291bfb, 2c5d208, a23826c, 540d6f1)
+  - [16:46] sabotage: linkage write removed → prdy 3 fail / mosaic 2 fail, 1548/1548 pre-existing pass; restored byte-identically; re-green 20/20 + 1557/1557
+  - [16:47] report written to /var/tmp/ri-050/ri-4-001-report.md — card complete

scripts/verify-release.mjs

@@ -1,166 +0,0 @@
-#!/usr/bin/env node
-// verify-release.mjs — the ONE canonical terminal verification command
-// (SDLC-D-034, `pnpm verify:release`).
-//
-// Publication (.woodpecker/publish.yml `verify` step) is bound to terminal
-// verification of the exact commit through this command, which is composed
-// from the SAME commands the PR CI pipeline (.woodpecker/ci.yml) runs — CI and
-// publish share one semantic checklist:
-//
-//   stage         | mirrors ci.yml step | commands
-//   --------------|---------------------|------------------------------------------
-//   sanitization  | sanitization        | verify-sanitized.sh, check-resident-
-//                |                     | budget.sh (--self-test + run),
-//                |                     | check-test-enumeration.sh
-//   upgrade-guard | upgrade-guard       | test-upgrade-manifest-guard.sh,
-//                |                     | test-upgrade-rollback.sh,
-//                |                     | test-upgrade-durable-snapshot.sh,
-//                |                     | test-install-migration.sh
-//   typecheck     | typecheck           | pnpm typecheck (runs the checkout
-//                |                     | preflight, then turbo typecheck)
-//   lint          | lint                | pnpm lint
-//   format        | format              | pnpm format:check
-//   test          | test                | pnpm test
-//   build         | publish.yml build   | pnpm build
-//
-// Caller-provided prerequisites (kept at the pipeline level — see the comments
-// in .woodpecker/ci.yml): `bash` + `rsync` for the guard stages, `openssl` and
-// the pinned @earendil-works/pi-coding-agent for the test stage, and — on the
-// postgres path only — the ci-postgres service plus
-// `pnpm --filter @mosaicstack/db run db:migrate` before the test stage.
-//
-// This command works with DATABASE_URL set (CI postgres path) or unset (local
-// PGlite path); it never sets, exports, or requires a database itself.
-//
-// scripts/verify-release.test.mjs enforces that this stage table keeps
-// matching .woodpecker/ci.yml step-for-step, so the two surfaces cannot drift
-// apart silently.
-
-import { spawnSync } from 'node:child_process';
-import path from 'node:path';
-import { fileURLToPath } from 'node:url';
-
-export const STAGES = [
-  {
-    name: 'sanitization',
-    // Mirror of the .woodpecker/ci.yml `sanitization` step (minus its
-    // `apk add` environment prep). Kept as direct command strings here: the
-    // #1017 test-enumeration guard audits these paths through the ci.yml
-    // surface, so indirection from ci.yml into this file is not possible.
-    commands: [
-      'bash packages/mosaic/framework/tools/quality/scripts/verify-sanitized.sh',
-      'bash packages/mosaic/framework/tools/quality/scripts/check-resident-budget.sh --self-test',
-      'bash packages/mosaic/framework/tools/quality/scripts/check-resident-budget.sh',
-      'bash packages/mosaic/framework/tools/quality/scripts/check-test-enumeration.sh',
-    ],
-  },
-  {
-    name: 'upgrade-guard',
-    // Mirror of the .woodpecker/ci.yml `upgrade-guard` step (minus its
-    // `apk add` environment prep).
-    commands: [
-      'bash packages/mosaic/framework/tools/quality/scripts/test-upgrade-manifest-guard.sh',
-      'bash packages/mosaic/framework/tools/quality/scripts/test-upgrade-rollback.sh',
-      'bash packages/mosaic/framework/tools/quality/scripts/test-upgrade-durable-snapshot.sh',
-      'bash packages/mosaic/framework/tools/quality/scripts/test-install-migration.sh',
-    ],
-  },
-  {
-    // `pnpm typecheck` is `pnpm preflight && turbo run typecheck`, so the
-    // checkout preflight (scripts/preflight.mjs) is part of this stage exactly
-    // as it is part of the ci.yml `typecheck` step.
-    name: 'typecheck',
-    commands: ['pnpm typecheck'],
-  },
-  {
-    name: 'lint',
-    commands: ['pnpm lint'],
-  },
-  {
-    name: 'format',
-    commands: ['pnpm format:check'],
-  },
-  {
-    // Requires `openssl` and the pinned `pi` binary on the pipeline path; see
-    // the caller-provided prerequisites above.
-    name: 'test',
-    commands: ['pnpm test'],
-  },
-  {
-    name: 'build',
-    commands: ['pnpm build'],
-  },
-];
-
-export function stageByName(name) {
-  return STAGES.find((stage) => stage.name === name);
-}
-
-function missingBinaries(bins) {
-  return bins.filter(
-    (bin) => spawnSync('sh', ['-c', `command -v ${bin} >/dev/null 2>&1`]).status !== 0,
-  );
-}
-
-function runCommand(command) {
-  const result = spawnSync(command, { shell: true, stdio: 'inherit' });
-  if (result.error) {
-    console.error(`[verify:release] failed to launch '${command}': ${result.error.message}`);
-    return false;
-  }
-  if (result.status !== 0) {
-    const reason = result.signal ? `terminated by ${result.signal}` : `exited ${result.status}`;
-    console.error(`[verify:release] command '${command}' ${reason}`);
-    return false;
-  }
-  return true;
-}
-
-// Runs the complete mandatory verification set (or, with --stage <name>, the
-// single named stage — used for wiring/smoke-testing, not for gating: only a
-// run of every stage is a terminal verification). Fails fast: the first
-// failing command aborts with a non-zero exit code. Returns the exit code.
-export function verifyRelease({ stages = STAGES } = {}) {
-  const missing = missingBinaries(['bash', 'rsync']);
-  if (missing.length > 0) {
-    console.error(
-      `[verify:release] FATAL: required binaries missing from PATH: ${missing.join(', ')}. ` +
-        'The caller provides them (ci-base bakes bash; pipelines apk add rsync).',
-    );
-    return 1;
-  }
-  for (const stage of stages) {
-    console.log(`\n[verify:release] === stage: ${stage.name} ===`);
-    for (const command of stage.commands) {
-      console.log(`[verify:release] $ ${command}`);
-      if (!runCommand(command)) {
-        console.error(
-          `[verify:release] FATAL: stage '${stage.name}' failed — verification inconclusive`,
-        );
-        return 1;
-      }
-    }
-  }
-  console.log(`\n[verify:release] all ${stages.length} stage(s) passed`);
-  return 0;
-}
-
-function main(argv) {
-  const stageFlagIndex = argv.indexOf('--stage');
-  if (stageFlagIndex !== -1) {
-    const name = argv[stageFlagIndex + 1];
-    const stage = stageByName(name);
-    if (!stage) {
-      console.error(
-        `[verify:release] unknown stage '${name ?? ''}' — expected one of: ${STAGES.map((entry) => entry.name).join(', ')}`,
-      );
-      process.exit(2);
-    }
-    process.exit(verifyRelease({ stages: [stage] }));
-  }
-  process.exit(verifyRelease());
-}
-
-if (process.argv[1] && path.resolve(process.argv[1]) === fileURLToPath(import.meta.url)) {
-  main(process.argv.slice(2));
-}

scripts/verify-release.test.mjs

@@ -1,277 +0,0 @@
-import assert from 'node:assert/strict';
-import { readFile } from 'node:fs/promises';
-import { createRequire } from 'node:module';
-import path from 'node:path';
-import test from 'node:test';
-
-import { STAGES } from './verify-release.mjs';
-
-// SDLC-D-034 checkout invariant: publication in .woodpecker/publish.yml is
-// bound to exact-commit terminal verification. This suite parses the real
-// pipeline files and fails red when the gate is bypassed, weakened, or drifts
-// out of sync with the canonical `pnpm verify:release` command.
-
-// Reuse the monorepo's existing YAML parser (@mosaicstack/mosaic's direct
-// dependency) instead of adding a root dependency or vendoring a parser.
-const mosaicRequire = createRequire(
-  path.resolve(process.cwd(), 'packages', 'mosaic', 'package.json'),
-);
-const { parse: parseYaml } = mosaicRequire('yaml');
-
-const publishYmlPath = path.join(process.cwd(), '.woodpecker', 'publish.yml');
-const ciYmlPath = path.join(process.cwd(), '.woodpecker', 'ci.yml');
-
-async function readPublishPipeline() {
-  return parseYaml(await readFile(publishYmlPath, 'utf8'));
-}
-
-// A step has an external publication effect when its name starts with
-// `publish` or when any command pushes an image to a registry.
-function pushesImage(step) {
-  return (step.commands ?? []).some((command) =>
-    /(^|\s)(\/kaniko\/executor|docker push)\b|--destination/.test(command),
-  );
-}
-
-function publishEffectSteps(pipeline) {
-  return Object.entries(pipeline.steps ?? {})
-    .filter(([name, step]) => name.startsWith('publish') || pushesImage(step))
-    .map(([name]) => name);
-}
-
-// Transitive closure of a step's depends_on graph.
-function dependencyClosure(pipeline, stepName, seen = new Set()) {
-  const dependencies = pipeline.steps?.[stepName]?.depends_on ?? [];
-  for (const dependency of dependencies) {
-    if (seen.has(dependency)) continue;
-    seen.add(dependency);
-    dependencyClosure(pipeline, dependency, seen);
-  }
-  return seen;
-}
-
-function verifyCommands(pipeline) {
-  const verify = pipeline.steps?.verify;
-  assert.ok(verify, 'publish pipeline must define a `verify` step');
-  assert.ok(Array.isArray(verify.commands), '`verify` step must have commands');
-  return verify.commands;
-}
-
-function assertCommitIdentityAssertion(commands) {
-  const text = commands.join('\n');
-  assert.match(
-    text,
-    /CI_COMMIT_SHA/,
-    '`verify` must compare the provider commit identity (CI_COMMIT_SHA)',
-  );
-  assert.match(text, /git rev-parse HEAD/, '`verify` must compare against git rev-parse HEAD');
-  assert.match(
-    text,
-    /exit 1/,
-    '`verify` must fail closed (exit 1) on identity mismatch or emptiness',
-  );
-}
-
-function assertCanonicalCommand(commands) {
-  assert.ok(
-    commands.some((command) => /^pnpm verify:release\b/.test(command.trim())),
-    '`verify` must run the canonical terminal verification command `pnpm verify:release`',
-  );
-}
-
-function assertPublishGate(pipeline) {
-  assert.ok(pipeline.steps, 'publish pipeline must define steps');
-
-  const commands = verifyCommands(pipeline);
-  assertCommitIdentityAssertion(commands);
-  assertCanonicalCommand(commands);
-
-  const effects = publishEffectSteps(pipeline);
-  assert.ok(effects.length > 0, 'publish pipeline must contain publish effect steps to guard');
-
-  for (const stepName of effects) {
-    const step = pipeline.steps[stepName];
-    assert.ok(
-      Array.isArray(step.depends_on) && step.depends_on.includes('verify'),
-      `publish effect '${stepName}' must depend DIRECTLY on the verify step (SDLC-D-034: transitively through build is not enough)`,
-    );
-    assert.ok(
-      dependencyClosure(pipeline, stepName).has('verify'),
-      `publish effect '${stepName}' must depend on a chain that includes verify`,
-    );
-  }
-  return effects;
-}
-
-test('the publish pipeline gates every publish effect behind exact-commit verification', async () => {
-  const pipeline = await readPublishPipeline();
-  const effects = assertPublishGate(pipeline);
-  assert.deepEqual(effects.sort(), [
-    'build-appservice',
-    'build-gateway',
-    'build-web',
-    'publish-next-npm',
-    'publish-npm',
-  ]);
-});
-
-test('the verify step carries no path/event short-circuit of its own', async () => {
-  const pipeline = await readPublishPipeline();
-  // A `when` filter on `verify` would let a publish effect fire on an event
-  // class that skipped verification — the gate must be unconditional.
-  assert.equal(pipeline.steps.verify.when, undefined);
-});
-
-test('a publish step that bypasses verify fails the gate checker', () => {
-  // Negative fixture: a plausible publish pipeline where `publish-npm` hangs
-  // off `build` only and `build` never chains to `verify` — the exact bypass
-  // class SDLC-D-034 closes. The checker must go red on it.
-  const bypassingPipeline = `
-steps:
-  install:
-    image: node:24-alpine
-    commands:
-      - pnpm install --frozen-lockfile
-  verify:
-    image: node:24-alpine
-    commands:
-      - |
-        if [ -z "$CI_COMMIT_SHA" ] || [ "$CI_COMMIT_SHA" != "$(git rev-parse HEAD)" ]; then
-          echo "identity mismatch" >&2
-          exit 1
-        fi
-      - pnpm verify:release
-    depends_on:
-      - install
-  build:
-    image: node:24-alpine
-    commands:
-      - pnpm build
-    depends_on:
-      - install
-  publish-npm:
-    image: node:24-alpine
-    commands:
-      - pnpm publish
-    depends_on:
-      - build
-`;
-  assert.throws(
-    () => assertPublishGate(parseYaml(bypassingPipeline)),
-    /publish-npm.*DIRECTLY.*verify/s,
-  );
-});
-
-test('a publish step chained to verify only transitively fails the gate checker', () => {
-  // Negative fixture: `build` depends on verify but `publish-npm` does not
-  // carry the direct edge — weaker than SDLC-D-034 requires of the real DAG.
-  const transitiveOnlyPipeline = `
-steps:
-  install:
-    image: node:24-alpine
-    commands:
-      - pnpm install --frozen-lockfile
-  verify:
-    image: node:24-alpine
-    commands:
-      - |
-        if [ -z "$CI_COMMIT_SHA" ] || [ "$CI_COMMIT_SHA" != "$(git rev-parse HEAD)" ]; then
-          echo "identity mismatch" >&2
-          exit 1
-        fi
-      - pnpm verify:release
-    depends_on:
-      - install
-  build:
-    image: node:24-alpine
-    commands:
-      - pnpm build
-    depends_on:
-      - install
-      - verify
-  publish-npm:
-    image: node:24-alpine
-    commands:
-      - pnpm publish
-    depends_on:
-      - build
-`;
-  assert.throws(
-    () => assertPublishGate(parseYaml(transitiveOnlyPipeline)),
-    /publish-npm.*DIRECTLY.*verify/s,
-  );
-});
-
-test('a verify step without the commit-identity assertion fails the gate checker', () => {
-  const noIdentityPipeline = `
-steps:
-  verify:
-    image: node:24-alpine
-    commands:
-      - pnpm verify:release
-  publish-npm:
-    image: node:24-alpine
-    commands:
-      - pnpm publish
-    depends_on:
-      - verify
-`;
-  assert.throws(() => assertPublishGate(parseYaml(noIdentityPipeline)), /CI_COMMIT_SHA/);
-});
-
-test('the canonical verify:release stages mirror the PR CI pipeline one-for-one', async () => {
-  const ci = parseYaml(await readFile(ciYmlPath, 'utf8'));
-  const canonical = Object.fromEntries(STAGES.map((stage) => [stage.name, stage.commands]));
-
-  // The complete mandatory set, in gate order.
-  assert.deepEqual(
-    STAGES.map((stage) => stage.name),
-    ['sanitization', 'upgrade-guard', 'typecheck', 'lint', 'format', 'test', 'build'],
-  );
-
-  // Guard stages: ci.yml commands minus its `apk add` environment prep must be
-  // exactly the canonical stage commands (order included).
-  for (const stageName of ['sanitization', 'upgrade-guard']) {
-    assert.deepEqual(
-      ci.steps[stageName].commands.filter((command) => !command.startsWith('apk add')),
-      canonical[stageName],
-      `canonical '${stageName}' stage must match the ci.yml step`,
-    );
-  }
-
-  // pnpm stages: ci.yml commands minus `corepack enable` must be exactly the
-  // canonical stage commands.
-  for (const stepName of ['typecheck', 'lint', 'format']) {
-    assert.deepEqual(
-      ci.steps[stepName].commands.filter((command) => command !== 'corepack enable'),
-      canonical[stepName],
-      `canonical '${stepName}' stage must match the ci.yml step`,
-    );
-  }
-
-  // The test stage is shared, but ci.yml wraps it in pipeline-level
-  // prerequisites the canonical command expects its caller to provide
-  // (SDLC-D-034): the postgres service + readiness wait + db:migrate, openssl,
-  // and the pinned pi runtime. None of those may be dropped silently.
-  for (const command of canonical.test) {
-    assert.ok(
-      ci.steps.test.commands.includes(command),
-      `ci.yml test step must run the canonical test stage command '${command}'`,
-    );
-  }
-  for (const fragment of [
-    'pg_isready -h ci-postgres',
-    'pnpm --filter @mosaicstack/db run db:migrate',
-    'npm install -g @earendil-works/[email protected]',
-  ]) {
-    assert.ok(
-      ci.steps.test.commands.some((command) => command.includes(fragment)),
-      `ci.yml test step must keep its pipeline-level prerequisite '${fragment}'`,
-    );
-  }
-});
-
-test('the root package.json exposes verify:release as the canonical command', async () => {
-  const packageJson = JSON.parse(await readFile(path.join(process.cwd(), 'package.json'), 'utf8'));
-  assert.match(packageJson.scripts['verify:release'], /scripts\/verify-release\.mjs/);
-});