---
phase: 14-parallel-phase-execution
plan: 02
subsystem: events
tags: [events, domain-events, phase-lifecycle]

# Dependency graph
requires:
  - phase: 01.1-hexagonal
    provides: EventBus port and DomainEvent patterns
provides:
  - Phase lifecycle events for parallel execution coordination
affects: [14-parallel-phase-execution]

# Tech tracking
tech-stack:
  added: []
  patterns: [phase-events-follow-task-event-pattern]

key-files:
  created: []
  modified:
    - src/events/types.ts
    - src/events/index.ts

key-decisions:
  - "Phase events follow task event naming pattern (phase:queued, phase:started, etc.)"
  - "PhaseBlockedEvent has reason string (not blockedBy array) matching existing convention"

patterns-established:
  - "Phase events mirror task events for consistency"

# Metrics
duration: 3min
completed: 2026-02-02
---

# Phase 14 Plan 02: Phase Lifecycle Events Summary

**Four phase domain events (queued, started, completed, blocked) for parallel phase execution coordination**

## Performance

- **Duration:** 3 min
- **Started:** 2026-02-02T13:32:00Z
- **Completed:** 2026-02-02T13:35:00Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments

- Added PhaseQueuedEvent for tracking phases awaiting execution with dependsOn array
- Added PhaseStartedEvent for phase execution start notifications
- Added PhaseCompletedEvent with success flag and optional message
- Added PhaseBlockedEvent for blocked phases with reason string
- All events follow existing task event patterns for consistency

## Task Commits

Each task was committed atomically:

1. **Task 1: Add phase domain events** - `cd02439` (feat)
2. **Task 2: Export phase events** - `e8ee7f3` (feat)

## Files Created/Modified

- `src/events/types.ts` - Added four phase event interfaces and added them to DomainEventMap union
- `src/events/index.ts` - Added exports for PhaseQueuedEvent, PhaseStartedEvent, PhaseCompletedEvent, PhaseBlockedEvent

## Decisions Made

- Phase events follow the exact naming pattern of task events (phase:queued mirrors task:queued, etc.)
- PhaseBlockedEvent uses a simple reason string rather than blockedBy array, matching the simpler pattern appropriate for phase-level blocking

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Phase events ready for use in parallel execution coordination
- Events follow established patterns and are fully type-safe
- Ready for 14-03-PLAN.md

---
*Phase: 14-parallel-phase-execution*
*Completed: 2026-02-02*
