---
phase: 03-git-integration
plan: 02
subsystem: git
tags: [git, worktree, simple-git, hexagonal, adapter, testing]

# Dependency graph
requires:
  - phase: 03-01
    provides: WorktreeManager port interface and git event types
provides:
  - SimpleGitWorktreeManager adapter implementation
  - Comprehensive test suite for git worktree operations
  - Event emission for worktree lifecycle
affects: [04-agent-lifecycle, 06-coordination]

# Tech tracking
tech-stack:
  added: [simple-git]
  patterns: [port-adapter for git operations, temp repo test setup]

key-files:
  created:
    - src/git/manager.ts
    - src/git/manager.test.ts
  modified:
    - src/git/index.ts
    - package.json

key-decisions:
  - "Task 1 expanded to include diff/merge since all methods in same file"
  - "Worktrees stored in .cw-worktrees directory within repo"
  - "EventBus is optional dependency injection - same pattern as EventEmitterBus"
  - "Test setup creates real temp git repos for each test"

patterns-established:
  - "createTestRepo() helper for git integration tests"
  - "Porcelain parsing for git worktree list output"

# Metrics
duration: 5min
completed: 2026-01-30
---

# Phase 3 Plan 2: WorktreeManager Adapter Implementation Summary

**SimpleGitWorktreeManager adapter with simple-git and 23 comprehensive tests covering create, remove, list, get, diff, and merge operations**

## Performance

- **Duration:** 5 min
- **Started:** 2026-01-30T18:26:23Z
- **Completed:** 2026-01-30T18:30:55Z
- **Tasks:** 3
- **Files modified:** 4

## Accomplishments

- Implemented SimpleGitWorktreeManager class with all 6 WorktreeManager port methods
- Added simple-git dependency for git CLI operations
- Created 23 comprehensive tests covering CRUD, diff, and merge operations
- All 4 git events properly emitted (created, removed, merged, conflict)
- Conflict detection and abort/cleanup working correctly

## Task Commits

Each task was committed atomically:

1. **Task 1: Install simple-git and create WorktreeManager adapter with CRUD** - `0cf2849` (feat)
2. **Task 2: Implement diff and merge operations** - (included in Task 1 - same file)
3. **Task 3: Write tests for WorktreeManager** - `c32bc55` (test)

## Files Created/Modified

**Created:**
- `src/git/manager.ts` - SimpleGitWorktreeManager adapter implementing WorktreeManager port
- `src/git/manager.test.ts` - 23 tests with temp repo setup for each test

**Modified:**
- `src/git/index.ts` - Added export for SimpleGitWorktreeManager adapter
- `package.json` - Added simple-git dependency

## Decisions Made

- **Task 1 expansion:** Implemented all 6 methods (create, remove, list, get, diff, merge) in Task 1 since they're all in the same file. Task 2 verification passed as the code was already complete.
- **Worktree storage:** Worktrees created in `.cw-worktrees` directory within the repository
- **Event injection:** EventBus is optional constructor parameter - same DI pattern used by other adapters
- **Test strategy:** Each test gets a fresh temp git repo with initial commit - isolation prevents test interference

## Deviations from Plan

### Auto-merged Tasks

**1. [Tasks 1+2 merged] All WorktreeManager methods implemented in single task**
- **Reason:** Tasks 1 and 2 both modify src/git/manager.ts - splitting would create artificial commit boundary
- **Impact:** Two commits instead of three, functionally equivalent result
- **Files:** src/git/manager.ts contains all CRUD + diff + merge methods

---

**Total deviations:** 1 (task merge for efficiency)
**Impact on plan:** No functional difference - all methods implemented and tested

## Issues Encountered

None - implementation followed plan and all tests pass.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- WorktreeManager adapter fully implemented and tested
- All 4 GIT requirements satisfied:
  - GIT-01: create() provides isolated worktree per agent
  - GIT-02: diff() previews agent's changes
  - GIT-03: merge() integrates changes to target branch
  - GIT-04: remove() cleans up worktree
- Ready for Phase 4: Agent Lifecycle which will use WorktreeManager for agent isolation
- No blockers

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