suaveplan/openspec/archive/2026-05-26-api-events-in-memory/tasks.md

Tasks — @suaveplan/api-events-in-memory

Every checkbox MUST reflect work actually done in this change.

0. Pre-flight (non-negotiable)

• 0.1 Confirm clean working tree (git status reports nothing) and no in-flight worktrees with uncommitted work (git worktree list then git status in each)
• 0.2 If any worktrees exist under .claude/worktrees/, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (git worktree remove) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
• 0.3 Confirm the package set in MANIFEST.md matches find packages -maxdepth 3 -name package.json count. Drift here means a prior change archived without regenerating the manifest.

1. Spec authoring

• 1.1 Read design doc (§13.2, §15 Stage 5)
• 1.2 Read openspec/changes/api-events-worker-proxy/ and @suaveplan/events README for upstream contracts
• 1.3 Read openspec/AGENTS.md Sections 13 and 14
• 1.4 Draft proposal.md
• 1.5 Draft specs/api-events-in-memory/spec.md
• 1.6 Every requirement carries **Verified by:**

2. Implementation

• 2.1 Scaffold packages/api/api-events-in-memory/ (deps: api-events, api-types, events, error, zod)
• 2.2 src/options/in-memory-events-bus-options.ts — Zod schema
• 2.3 src/factory/create-in-memory-events-bus.ts — wraps createEventBus from @suaveplan/events
• 2.4 src/history/history.ts — per-topic ring buffer with maxHistoryPerTopic cap
• 2.5 src/error-codes.ts — EVENTS_IN_MEMORY_* codes via defineCodes
• 2.6 src/index.ts — explicit named re-exports
• 2.7 Register this adapter in @suaveplan/api-host/testing's adapter table under events: "in-memory"

3. Tests

• 3.1 src/factory/create-in-memory-events-bus.test.ts
• 3.2 src/factory/create-in-memory-events-bus.spec-conformance.test.ts — conformance
• 3.3 src/history/history.test.ts — overflow protection
• 3.4 tests/integration/integration.test.ts — via createTestHost
• 3.5 Every it(...) carries { timeout: 5000 }

4. Documentation

• 4.1 Sibling .md per implementation .ts
• 4.2 README copies the host.events.published example verbatim from §13.2

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

• 5.1 bun run check — clean
• 5.2 bunx turbo lint typecheck test --filter=@suaveplan/api-events-in-memory — green
• 5.3 bunx turbo test:coverage --filter=@suaveplan/api-events-in-memory — 100/100/100/100
• 5.4 bun scripts/openspec-conformance.ts @suaveplan/api-events-in-memory — exit 0
• 5.5 bunx turbo build --filter=@suaveplan/api-events-in-memory — green

6. Pre-archive 7-row checklist

• 6.1 expectTypeOf asserts published(topic) returns unknown[] (or the declared payload type when generic)
• 6.2 Zod schema at options boundary
• 6.3 Every EVENTS_IN_MEMORY_* code thrown by at least one production path
• 6.4 Strict-mode (history-overflow throws vs drops oldest — pin one) tested both ways
• 6.5 OTel instruments inherited from @suaveplan/events asserted with in-memory MeterProvider
• 6.6 Subscriber-idempotency dedup tested (re-publishing same payload-id calls subscriber once)
• 6.7 No retroactive tick

7. Archive

• 7.1 Fold into openspec/specs/api-events-in-memory/spec.md
• 7.2 Move to openspec/archive/<yyyy-mm-dd>-api-events-in-memory/
• 7.3 Tick Stage 5 box in umbrella tasks
• 7.4 Refresh MANIFEST.md