---
phase: 03-git-integration
plan: 01
subsystem: git
tags: [git, worktree, hexagonal, port-adapter, events]

# Dependency graph
requires:
  - phase: 01.1-01
    provides: EventBus port interface and DomainEvent pattern
provides:
  - Git domain events (WorktreeCreated, WorktreeRemoved, WorktreeMerged, WorktreeConflict)
  - WorktreeManager port interface
  - Worktree, WorktreeDiff, MergeResult types
affects: [03-02-worktree-adapter, 04-agent-lifecycle, 06-coordination]

# Tech tracking
tech-stack:
  added: []
  patterns: [port-adapter for git operations]

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

key-decisions:
  - "WorktreeManager as PORT interface - same pattern as EventBus"
  - "Four git events cover full worktree lifecycle: create, remove, merge, conflict"
  - "MergeResult includes conflicts array for conflict bounce-back to agents"

patterns-established:
  - "Port-adapter for git: WorktreeManager interface defines contract, adapter implements via git CLI"
  - "Git events extend DomainEvent: consistent with existing event patterns"

# Metrics
duration: 2min
completed: 2026-01-30
---

# Phase 3 Plan 1: Git Events and WorktreeManager Port Summary

**Git domain events and WorktreeManager port interface following hexagonal architecture**

## Performance

- **Duration:** 2 min
- **Started:** 2026-01-30T18:22:41Z
- **Completed:** 2026-01-30T18:24:08Z
- **Tasks:** 2
- **Files modified:** 4

## Accomplishments

- Added 4 git worktree events to the event system (created, removed, merged, conflict)
- Created WorktreeManager port interface with 6 methods covering all GIT requirements
- Established src/git module following same patterns as src/events
- Full JSDoc documentation for all types and methods

## Task Commits

Each task was committed atomically:

1. **Task 1: Add git domain events to event types** - `9d7b90b` (feat)
2. **Task 2: Create WorktreeManager port interface** - `99e4442` (feat)

## Files Created/Modified

**Created:**
- `src/git/types.ts` - Worktree, WorktreeDiff, MergeResult types and WorktreeManager port interface
- `src/git/index.ts` - Module exports

**Modified:**
- `src/events/types.ts` - Added WorktreeCreatedEvent, WorktreeRemovedEvent, WorktreeMergedEvent, WorktreeConflictEvent
- `src/events/index.ts` - Added exports for new git events

## Decisions Made

- **WorktreeManager as PORT:** Same pattern as EventBus - interface defines contract, implementations (adapters) can be swapped
- **Four event types:** Cover full lifecycle - create for setup, remove for cleanup, merged for success, conflict for bounce-back
- **MergeResult.conflicts array:** Enables coordination layer to bounce conflicts back to agents for resolution

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Git events integrated into existing event system
- WorktreeManager port interface ready for adapter implementation (03-02)
- Types provide foundation for agent worktree isolation
- No blockers for continuing

---
*Phase: 03-git-integration*
*Completed: 2026-01-30*
