# Tasks — add-packer-browser-core (Cluster A migration of `@suaveplan/packer-browser`)

> Every checkbox MUST reflect work actually done in this change. No retroactive ticking.

## 1. Spec authoring

- [x] 1.1 Read `../suaveplan/enterprise/packer-browser.md` end-to-end
- [x] 1.2 Read `openspec/specs/packer/spec.md` (sibling reference) and the
  archived `enterprise-packer-*` change deltas
- [x] 1.3 Read `openspec/AGENTS.md` §0a, §0c, §2b, §2c, §6a, §7, §13, §14
- [x] 1.4 Draft `proposal.md` from `openspec/templates/proposal.md` with
  `## Source mapping`, `## Out of scope`, `## Parity Checklist`, and
  `## Impact` populated
- [x] 1.5 Fill in `## Source mapping` table — every requirement cites
  enterprise-audit line ranges OR appears in the "no source line" table
- [x] 1.6 Draft `specs/packer-browser/spec.md` from
  `openspec/templates/spec-delta.md`
- [x] 1.7 Every requirement in the spec delta carries a `**Verified by:**`
  line naming concrete `it(...)` titles

## 2. Implementation

- [x] 2.1 Fix `scripts/folder-reorg/assignment.yml` — remove
  `- packer-browser` from `bitpacker:`, insert under `data:` between
  `packer` and `pagination`
- [x] 2.2 Author `package.json` (workspace deps via `workspace:^`,
  externals via `catalog:` keys, no React, no bare versions)
- [x] 2.3 Author `tsconfig.lib.json` (extends repo base, DOM + WebWorker
  libs)
- [x] 2.4 Author `vite.config.ts` (multi-entry build for the 5 subpaths)
- [x] 2.5 Author `vitest.config.ts` (via `createTestConfig` with
  `happy-dom`, `fileParallelism: false`)
- [x] 2.6 Author `playwright.config.ts` (Chromium project, no parallelism)
- [x] 2.7 `src/error-codes.ts` — `PACKER_BROWSER_CODES` (6 stable codes) +
  `PACKER_BROWSER_ERROR_METADATA` + `PackerBrowserError extends SuaveplanError`
- [x] 2.8 `src/i18n/messages.ts` + `messages.types.ts` — `PACKER_BROWSER_MESSAGES`
  catalog + `defaultPackerBrowserResolver` + `resolvePackerBrowserMessage`
- [x] 2.9 `src/runtime/runtime.ts` + `runtime.types.ts` — `defaultClock`,
  `defaultRng`, `resolveRuntime`, `elapsedMs`
- [x] 2.10 `src/observability/observability.ts` + `observability.types.ts`
  — `createPackerBrowserObservability` exposing 3 counters + 1 histogram
- [x] 2.11 `src/flags/flags.ts` — `resolveFlagsProvider` (`MemoryProvider`
  fallback)
- [x] 2.12 `src/signature/signature.ts` — `verifyArchiveSignature` wrapping
  `ed25519.verify`
- [x] 2.13 `src/cache/cache.ts` — `PackedResourceCache` (LRU + ref-count +
  Blob-URL bookkeeping, OTel-instrumented, Clock-driven timestamps)
- [x] 2.14 `src/loader/loader.ts` — `PackedResourceLoader` (fetch via
  `withRetry`, signature verification, `AbortSignal` at every yield,
  `Unpacker.unpack` integration, histogram observation)
- [x] 2.15 `src/manager/manager.ts` — `PackedResourceManager` lifecycle
  façade + `createPackedResourceManager` factory + event emitter; each
  file ≤ 300 LOC
- [x] 2.16 `src/service-worker/sw-shim.ts` — hand-rolled
  `createServiceWorkerShim()` implementing `ServiceWorkerGlobalScope`,
  `FetchEvent`, `ExtendableEvent`, `Cache`, `CacheStorage`, `Clients`
- [x] 2.17 `src/service-worker/service-worker.ts` —
  `runPackedResourceServiceWorker(scope)` registering install / activate /
  fetch / message handlers
- [x] 2.18 `src/utils/register-service-worker.ts` — register / unregister /
  clearCache / getCacheStatus helpers
- [x] 2.19 `src/singleton.ts` — module-singleton hosted at `/singleton`
  subpath
- [x] 2.20 `src/index.ts` — explicit named re-exports (no `export *`);
  default surface excludes `packedResourceManager`
- [x] 2.21 `README.md` — install / quick-start / modules

## 3. Tests (100% coverage, runner-neutral imports)

- [x] 3.1 `src/error-codes.test.ts` covering PACKER-BROWSER-6
- [x] 3.2 `src/i18n/messages.test.ts` covering PACKER-BROWSER-8
- [x] 3.3 `src/runtime/runtime.test.ts` covering PACKER-BROWSER-9
- [x] 3.4 `src/observability/observability.test.ts` covering PACKER-BROWSER-4
- [x] 3.5 `src/flags/flags.test.ts` covering PACKER-BROWSER-11
- [x] 3.6 `src/signature/signature.test.ts` covering PACKER-BROWSER-3
- [x] 3.7 `src/cache/cache.test.ts` covering PACKER-BROWSER-1, -4, -9
- [x] 3.8 `src/loader/loader.test.ts` covering PACKER-BROWSER-1, -3, -4,
  -6, -7, -10
- [x] 3.9 `src/manager/manager.test.ts` covering PACKER-BROWSER-1, -5, -7,
  -11
- [x] 3.10 `src/singleton.test.ts` covering PACKER-BROWSER-5
- [x] 3.11 `src/service-worker/sw-shim.test.ts` covering PACKER-BROWSER-2
- [x] 3.12 `src/service-worker/service-worker.test.ts` covering
  PACKER-BROWSER-2
- [x] 3.13 `src/utils/register-service-worker.test.ts` covering
  PACKER-BROWSER-2
- [x] 3.14 `src/index.test.ts` covering PACKER-BROWSER-12
- [x] 3.15 Every `it(...)` carries `{ timeout: 5000 }`; async-IO suites
  use `{ timeout: 30_000 }`
- [x] 3.16 Every test file imports from `@suaveplan/testing/runner` only
  (no direct `vitest` / `bun:test` imports)
- [x] 3.17 `tests/e2e/sw.spec.ts` Playwright happy-path

## 4. Documentation

- [x] 4.1 Sibling `.md` for every implementation `.ts` (≥200 words,
  Purpose / Features / Basic / Advanced / API Reference /
  Implementation Notes)
- [x] 4.2 `README.md` links every co-located `.md` under `## Modules`
- [x] 4.3 Update root `CLAUDE.md` package listing to add the new package
- [x] 4.4 Update `STATUS.md` — flip the `packer-browser` row to ✅ and
  move it into the `data` section table
- [x] 4.5 Refresh `MANIFEST.md` via
  `bun scripts/folder-reorg/generate-manifest.ts`

## 5. Pre-archive verification (the 5-gate triple)

- [x] 5.1 `bun run check` — Biome 0 errors / 0 warnings / 0 info
- [x] 5.2 `bunx turbo lint typecheck test --filter=@suaveplan/packer-browser`
  — green
- [x] 5.3 `bunx turbo test:coverage --filter=@suaveplan/packer-browser` —
  100/100/100/100
- [x] 5.4 `bun scripts/openspec-conformance.ts @suaveplan/packer-browser`
  — exit 0
- [x] 5.5 `bunx turbo build --filter=@suaveplan/packer-browser` — green

## 6. Pre-archive 7-row checklist (AGENTS.md §13)

- [x] 6.1 Generics threaded; `expectTypeOf` assertions on every literal-type
  claim that affects the public surface
- [x] 6.2 Zod schemas wired at every declared boundary (option-bundle
  validation deferred to Cluster B per audit; flagged in proposal)
- [x] 6.3 Every error code in `error-codes.ts` thrown by at least one
  production path
- [x] 6.4 Strict-mode behaviors tested both on and off (signature verify
  on / off; retry on / off; cache on / off)
- [x] 6.5 OTel instruments emitted from production paths and asserted with
  a real in-memory `MeterProvider`
- [x] 6.6 Lifecycle dedup tested where claimed (factory returns fresh
  instances; singleton returns stable reference)
- [x] 6.7 No retroactive tick — every box above reflects work done in this
  change

## 7. Archive

- [x] 7.1 Fold spec delta into `openspec/specs/packer-browser/spec.md`
- [x] 7.2 Move `openspec/changes/add-packer-browser-core/` →
  `openspec/archive/<yyyy-mm-dd>-add-packer-browser-core/`
- [x] 7.3 Refresh `MANIFEST.md` after the move