---
phase: 16-integration--reliability
plan: 01
subsystem: notification-pipeline
tags: [dedup, rate-limiting, swift, reliability, notification-processing]

requires:
  - phase: 11-notification-formatting
    provides: "Telegram notification pipeline and formatting"
  - phase: 13-auto-continue
    provides: "AutoContinueEvaluator and CircuitBreaker"
provides:
  - "NotificationProcessor with session dedup (15-min TTL, transcript size tracking)"
  - "Rate limiting (5s minimum interval, mutex gate) for notification pipeline"
  - "Config constants for dedup TTL and rate limit interval"
affects: []

tech-stack:
  added: []
  patterns: ["NSLock-based thread-safe processor with dedup + rate limiting"]

key-files:
  created:
    - plugins/claude-tts-companion/Sources/claude-tts-companion/NotificationProcessor.swift
  modified:
    - plugins/claude-tts-companion/Sources/claude-tts-companion/main.swift
    - plugins/claude-tts-companion/Sources/claude-tts-companion/Config.swift

key-decisions:
  - "Ported dedup/rate-limit logic directly from legacy TypeScript notification-watcher.ts"
  - "Used NSLock (not actors) for thread safety -- consistent with existing codebase patterns"

patterns-established:
  - "NotificationProcessor gates all notification callbacks via processIfReady"
  - "Dedup uses session ID + transcript file size comparison within 15-min TTL"

requirements-completed: [REL-01, REL-02, REL-03, REL-04, REL-05]

duration: 2min
completed: 2026-03-27
---

# Phase 16 Plan 01: Integration Reliability Summary

**NotificationProcessor with session dedup (15-min TTL, transcript size tracking) and 5s rate limiting ported from legacy TypeScript**

## Performance

- **Duration:** 2 min
- **Started:** 2026-03-27T00:51:26Z
- **Completed:** 2026-03-27T00:53:29Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments

- NotificationProcessor.swift created with session-level dedup (DedupEntry struct, 15-min TTL, transcript size comparison)
- Rate limiting with 5s minimum interval, mutex gate, and pending file queue
- Automatic pruning of expired dedup entries (TTL \* 2 = 30 min cutoff)
- main.swift notification callback wrapped with processIfReady + shouldSkipDedup + recordProcessed
- REL-03/04/05 confirmed already working (CircuitBreaker, stop hook fields, tool breakdown)

## Task Commits

Each task was committed atomically:

1. **Task 1: Create NotificationProcessor with dedup and rate limiting** - `0bc2ba1b` (feat)
2. **Task 2: Wire NotificationProcessor into main.swift and verify build** - `73aaa33e` (feat)

## Files Created/Modified

- `plugins/claude-tts-companion/Sources/claude-tts-companion/NotificationProcessor.swift` - Dedup + rate limiting processor (150 lines)
- `plugins/claude-tts-companion/Sources/claude-tts-companion/main.swift` - Wired NotificationProcessor into notification callback
- `plugins/claude-tts-companion/Sources/claude-tts-companion/Config.swift` - Added notificationDedupTTL and notificationMinInterval constants

## Decisions Made

- Ported dedup/rate-limit logic directly from legacy TypeScript notification-watcher.ts for feature parity
- Used NSLock (not actors) for thread safety -- consistent with existing codebase patterns (FileWatcher, CircuitBreaker)

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Notification pipeline now has production reliability (dedup + rate limiting)
- All REL-01 through REL-05 requirements satisfied
- Ready for next phase execution

---

_Phase: 16-integration--reliability_
_Completed: 2026-03-27_
