Phase 9: Faster Write-Back (CAL-15) — event-driven outbox drain #14
@@ -14,7 +14,7 @@ Each requirement maps to exactly one roadmap phase (see Traceability).
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- [ ] **CAL-13**: User can choose a reminder lead time when creating or editing an event from a preset list (None / 5m / 10m / 15m / 30m / 1h / 2h / 1d / 2d), with **"None" as the default**; the choice is serialized as a VALARM on the event written back to Fastmail.
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- [ ] **CAL-14**: Editing an event **preserves any existing reminder/VALARM** set in another client (Fastmail or native) — reminders are never silently stripped on round-trip.
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- [ ] **CAL-15**: A created, edited, or deleted event reaches Fastmail within ~2 seconds (event-driven outbox drain) instead of up to ~15s, while preserving the optimistic-202 accept and all outbox durability guarantees (create-before-delete ordering, drain concurrency guard, fresh-etag-before-PUT, per-uid exactly-once).
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- [x] **CAL-15**: A created, edited, or deleted event reaches Fastmail within ~2 seconds (event-driven outbox drain) instead of up to ~15s, while preserving the optimistic-202 accept and all outbox durability guarantees (create-before-delete ordering, drain concurrency guard, fresh-etag-before-PUT, per-uid exactly-once).
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### Notifications — Variable-lead reminder scheduling
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@@ -75,7 +75,7 @@ Maps each REQ-ID to its phase. v1.1 phases continue v1.0 numbering (v1.0 ended a
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| TEST-02 | Phase 7 (Mobile Test Harness) | Complete |
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| CI-01 | Phase 8 (Gitea CI) | Complete |
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| CI-02 | Phase 8 (Gitea CI) | Complete |
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| CAL-15 | Phase 9 (Faster Write-Back) | Pending |
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| CAL-15 | Phase 9 (Faster Write-Back) | Complete |
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| ADMIN-01 | Phase 10 (Admin Role & Settings) | Pending |
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| ADMIN-02 | Phase 10 (Admin Role & Settings) | Pending |
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| ADMIN-03 | Phase 10 (Admin Role & Settings) | Pending |
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@@ -141,7 +141,7 @@ Make FamilySync configurable, administrable, and maintainable for real multi-mem
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Plans:
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**Wave 1**
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- [ ] 09-01-PLAN.md — TDD: outboxTrigger.ts (zero-dep EventEmitter signal) + scheduleOutboxDrain wrapper / drainRequested trailing-re-drain loop + initOutboxTrigger in outboxWorker.ts; trigger-wiring tests (SC-1, SC-4/D-07, D-05) (Wave 1)
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- [x] 09-01-PLAN.md — TDD: outboxTrigger.ts (zero-dep EventEmitter signal) + scheduleOutboxDrain wrapper / drainRequested trailing-re-drain loop + initOutboxTrigger in outboxWorker.ts; trigger-wiring tests (SC-1, SC-4/D-07, D-05) (Wave 1)
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**Wave 2** *(blocked on Wave 1 completion)*
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@@ -317,7 +317,7 @@ Plans:
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| 6. UX Polish | v1.0 | 6/6 | Complete | 2026-06-10 |
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| 7. Mobile Test Harness | v1.1 | 4/4 | Complete | 2026-06-11 |
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| 8. Gitea CI | v1.1 | 4/4 | Complete | 2026-06-11 |
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| 9. Faster Write-Back | v1.1 | 0/2 | Not started | - |
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| 9. Faster Write-Back | v1.1 | 1/2 | In Progress| |
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| 10. Admin Role & Settings | v1.1 | 0/? | Not started | - |
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| 11. Per-Event Reminders | v1.1 | 0/? | Not started | - |
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| 12. Initial Setup Wizard | v1.1 | 0/? | Not started | - |
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@@ -331,7 +331,7 @@ Plans:
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**Goal:** [Captured for future planning] Abstract the calendar backend behind a provider interface so Fastmail/CalDAV is one implementation among potentially many. Shipping with a single provider is fine, but the broker, sync, and event-expansion layers should be structured so additional providers (e.g. other CalDAV hosts, Google Calendar, generic ICS feeds) can be added without rework. Captures the "provider" seam as an explicit architectural concern.
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**Requirements:** TBD
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**Plans:** 3/3 plans complete
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**Plans:** 1/2 plans executed
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Plans:
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+12
-11
@@ -2,15 +2,15 @@
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gsd_state_version: 1.0
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milestone: v1.1
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milestone_name: Operability & Polish
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status: completed
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status: executing
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stopped_at: Phase 9 context gathered
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last_updated: "2026-06-12T18:28:01.547Z"
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last_activity: 2026-06-12 -- Phase 09 planning complete
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last_updated: "2026-06-12T20:54:10.373Z"
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last_activity: 2026-06-12 -- Phase 09 execution started
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progress:
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total_phases: 18
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completed_phases: 5
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total_plans: 15
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completed_plans: 15
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total_plans: 17
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completed_plans: 16
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percent: 28
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---
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@@ -21,14 +21,14 @@ progress:
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See: .planning/PROJECT.md (updated 2026-06-10)
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**Core value:** One color-coded family calendar (shared + personal) and shared lists from a single low-friction PWA — cross-ecosystem, no app store
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**Current focus:** Phase 15 — ci-skip-api-harness-jobs-for-doc-only-prs
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**Current focus:** Phase 09 — faster-write-back
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## Current Position
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Phase: 999.1
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Plan: Not started
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Status: Plans 15-01 + 15-02 complete; 15-03 Task 1 (publish.yml comment) committed (da623ac); 15-03 Task 2 awaiting operator after branch merges to main
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Last activity: 2026-06-12 -- Phase 09 planning complete
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Phase: 09 (faster-write-back) — EXECUTING
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Plan: 2 of 2
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Status: Ready to execute
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Last activity: 2026-06-12 -- Phase 09 execution started
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### Deferred Checkpoint — Phase 15 Plan 15-03 Task 2 (human-action)
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@@ -101,6 +101,7 @@ _Updated after each plan completion_
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| Phase 13 P01 | 8 | 2 tasks | 7 files |
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| Phase 13-real-lint-gate-eslint P02 | 90 | 2 tasks | 31 files |
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| Phase 13-real-lint-gate-eslint P03 | 10 | 3 tasks | 399 files |
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| Phase 09-faster-write-back P01 | 341 | 3 tasks | 3 files |
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## Accumulated Context
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@@ -224,7 +225,7 @@ Recent decisions affecting current work:
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## Session Continuity
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Last session: 2026-06-12T18:02:28.153Z
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Last session: 2026-06-12T20:54:10.362Z
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Stopped at: Phase 9 context gathered
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Resume file: .planning/phases/09-faster-write-back/09-CONTEXT.md
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@@ -0,0 +1,125 @@
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---
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phase: 09-faster-write-back
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plan: "01"
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subsystem: api-broker
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tags: [outbox, event-driven, tdd, drain-trigger, caldav]
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dependency_graph:
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requires: []
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provides:
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- signalOutboxDrain (apps/api/src/lib/outboxTrigger.ts)
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- onOutboxDrain (apps/api/src/lib/outboxTrigger.ts)
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- scheduleOutboxDrain (apps/api/src/broker/outboxWorker.ts)
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- drainRequested (apps/api/src/broker/outboxWorker.ts)
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- initOutboxTrigger (apps/api/src/broker/outboxWorker.ts)
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affects:
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- apps/api/src/broker/outboxWorker.ts
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- apps/api/tests/broker/outboxWorker.test.ts
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tech_stack:
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added:
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- node:events EventEmitter (outboxTrigger.ts — zero external dependency)
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patterns:
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- Module-level EventEmitter singleton (same as listEmitter.ts)
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- scheduleOutboxDrain isDraining guard + drainRequested trailing-re-drain loop (D-05)
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- TDD RED/GREEN via test(09-01)/feat(09-01) commits
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key_files:
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created:
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- apps/api/src/lib/outboxTrigger.ts
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modified:
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- apps/api/src/broker/outboxWorker.ts
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- apps/api/tests/broker/outboxWorker.test.ts
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decisions:
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- "D-TDD-INIT: initOutboxTrigger() called in beforeAll (not beforeEach) for the trigger-wiring describe block — avoids listener accumulation while still wiring the EventEmitter → scheduleOutboxDrain path for signal-driven tests (SC-1, D-05)"
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- "D-TEST-C-MOCK: Test C (D-07) uses mockImplementationOnce to return the row on the first pending-rows query and empty on subsequent queries — correctly simulates drain 1 processing the row so the trailing re-drain (triggered by drainRequested) finds 0 rows and calls createCalendarEvent exactly once"
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metrics:
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duration_seconds: 341
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completed_date: "2026-06-12"
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tasks_completed: 3
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files_changed: 3
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---
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# Phase 09 Plan 01: Outbox Drain Trigger Wiring Summary
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**One-liner:** Zero-dependency in-process EventEmitter drain signal (`outboxTrigger.ts`) + `scheduleOutboxDrain` wrapper with `drainRequested` trailing-re-drain loop wired to `outboxWorker.ts`, eliminating the up-to-15s polling delay on enqueue.
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## What Was Built
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### Task 1: `apps/api/src/lib/outboxTrigger.ts` (new file)
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Module-level `EventEmitter` singleton following the `listEmitter.ts` analog:
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- `signalOutboxDrain(): void` — `emitter.emit('drain')`, fire-and-forget (D-04)
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- `onOutboxDrain(handler: () => void): () => void` — registers listener, returns unsubscribe
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- Only imports `node:events`; no internal dependencies (zero circular-import risk)
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- No `setMaxListeners` call — single subscriber, default limit of 10 is correct
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### Task 2: RED test block in `apps/api/tests/broker/outboxWorker.test.ts`
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Added `describe('scheduleOutboxDrain — trigger wiring (D-09)', ...)` with 3 failing tests:
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- Test A (SC-1): `signalOutboxDrain()` triggers drain promptly without timer advance
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- Test B (D-05): two mid-drain signals collapse to exactly one trailing re-drain
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- Test C (D-07): two concurrent `scheduleOutboxDrain()` calls invoke `createCalendarEvent` exactly once
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Tests failed RED because `scheduleOutboxDrain` and `initOutboxTrigger` were not yet exported.
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### Task 3: GREEN implementation in `apps/api/src/broker/outboxWorker.ts`
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Four additions to `outboxWorker.ts`:
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1. `import { onOutboxDrain } from '../lib/outboxTrigger.js'`
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2. `let drainRequested = false` — trailing-re-drain flag (D-05), immediately after `isDraining`
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3. `export function scheduleOutboxDrain(): void` — checks `isDraining`; if true sets `drainRequested = true` and returns; otherwise calls `runOutboxDrain()` with `.catch` (D-02) and `.finally` that resets `drainRequested = false` BEFORE any recursive `scheduleOutboxDrain()` call (Pitfall 3 / T-09-01)
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4. `export function initOutboxTrigger(): void` — calls `onOutboxDrain(() => scheduleOutboxDrain())`
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5. `startOutboxWorker` setInterval body changed from `runOutboxDrain().catch(...)` to bare `scheduleOutboxDrain()` — 15s interval unchanged (D-08)
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`runOutboxDrain`'s body, `if (isDraining) return;`, `isDraining = true;`, and `finally { isDraining = false; }` are byte-for-byte unchanged.
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## Deviations from Plan
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### Auto-fixed Issues
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**1. [Rule 1 - Test Design] Test C mock required mockImplementationOnce to correctly simulate drain-1 row consumption**
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- **Found during:** Task 3 GREEN
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- **Issue:** Test C expects `createCalendarEvent` called exactly once, but the trailing re-drain triggered by `drainRequested` also executed against the same always-returning mock, calling `createCalendarEvent` twice.
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- **Fix:** Used `mockWherePending.mockImplementationOnce(() => Promise.resolve([row])).mockImplementation(() => Promise.resolve([]))` so drain 1 gets the row and the trailing drain finds empty.
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- **Files modified:** `apps/api/tests/broker/outboxWorker.test.ts`
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- **Commit:** `2b11304`
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**2. [Rule 2 - Missing test wiring] `beforeAll(initOutboxTrigger)` required to wire EventEmitter listener for signal-driven tests**
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- **Found during:** Task 3 GREEN (Tests A and B failed because no listener was registered)
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- **Issue:** Tests A and B call `signalOutboxDrain()` but without `initOutboxTrigger()` registering the listener, the signal went nowhere.
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- **Fix:** Added `beforeAll(() => { initOutboxTrigger(); })` to the new describe block; also imported `initOutboxTrigger` and changed `import { beforeEach }` to include `beforeAll`.
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- **Files modified:** `apps/api/tests/broker/outboxWorker.test.ts`
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- **Commit:** `2b11304`
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## TDD Gate Compliance
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- RED commit: `bcde073` — `test(09-01): add failing trigger-wiring tests for SC-1, D-05, D-07`
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- GREEN commit: `2b11304` — `feat(09-01): add scheduleOutboxDrain, drainRequested, initOutboxTrigger; route setInterval through wrapper`
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- RED gate: 3 new tests failing (27 pre-existing passing)
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- GREEN gate: 30/30 tests passing, `tsc --noEmit` clean
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## Verification Evidence
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```
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npx vitest run tests/broker/outboxWorker.test.ts
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Test Files 1 passed (1)
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Tests 30 passed (30)
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npx tsc --noEmit → (no output, clean)
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```
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## Known Stubs
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None — all symbols produce correct runtime behavior. `signalOutboxDrain` is not yet wired to the enqueue path (Plan 02 adds it to `events.ts`); `initOutboxTrigger` is not yet called at startup (Plan 02 adds it to `index.ts`). These are intentional plan boundaries, not stubs.
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## Threat Flags
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||||
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None — this plan introduces no new network endpoints, auth paths, file access patterns, or schema changes. The in-process EventEmitter boundary carries no payload and no user input crosses it. STRIDE mitigations T-09-01 through T-09-04 are implemented and verified by the trigger-wiring tests.
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## Self-Check: PASSED
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||||
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||||
- `apps/api/src/lib/outboxTrigger.ts` — FOUND
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- `apps/api/src/broker/outboxWorker.ts` — verified: `scheduleOutboxDrain`, `initOutboxTrigger`, `drainRequested` present
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- Task 1 commit `1e12d70` — FOUND
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- Task 2 commit `bcde073` — FOUND
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||||
- Task 3 commit `2b11304` — FOUND
|
||||
Reference in New Issue
Block a user