---
phase: 04-agent-lifecycle
plan: 03
subsystem: agent
tags: [claude-cli, execa, agent-manager, adapter, subprocess]

# Dependency graph
requires:
  - phase: 04-01
    provides: Agent schema and DrizzleAgentRepository
  - phase: 04-02
    provides: AgentManager port interface and lifecycle events
provides:
  - ClaudeAgentManager adapter implementation
  - CLI-based agent spawning with JSON output
  - Session ID extraction for resume capability
affects: [04-agent-lifecycle, 05-task-dispatch, tRPC-integration]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Adapter implementation for AgentManager port using Claude CLI"
    - "JSON output mode for structured CLI results"
    - "Subprocess tracking via in-memory Map for active agents"

key-files:
  created:
    - src/agent/manager.ts
    - src/agent/manager.test.ts
  modified:
    - src/agent/index.ts

key-decisions:
  - "Use Claude CLI with --output-format json (not SDK streaming)"
  - "Extract session_id from JSON result for resume capability"
  - "Use agent.id from repository for activeAgents tracking (not local UUID)"
  - "Handle waiting_for_input status for AskUserQuestion pauses"

# Metrics
duration: 4 min
completed: 2026-01-30
---

# Phase 04 Plan 03: ClaudeAgentManager Adapter Summary

**ClaudeAgentManager adapter using Claude CLI with JSON output for agent spawning and lifecycle management**

## Performance

- **Duration:** 4 min
- **Started:** 2026-01-30T20:03:52Z
- **Completed:** 2026-01-30T20:07:57Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments

- Implemented ClaudeAgentManager adapter with Claude CLI in JSON mode
- Session ID extraction from CLI JSON output for resume capability
- Full lifecycle event emission: spawned, stopped, crashed, resumed, waiting
- Comprehensive test suite with 19 tests mocking execa

## Task Commits

Each task was committed atomically:

1. **Task 1: Implement ClaudeAgentManager adapter** - `8193423` (feat)
2. **Task 2: Write tests for AgentManager** - `b718d59` (test)

## Files Created/Modified

- `src/agent/manager.ts` - ClaudeAgentManager implementation
- `src/agent/manager.test.ts` - 19 unit tests with execa mocking
- `src/agent/index.ts` - Export ClaudeAgentManager

## Decisions Made

1. **Use Claude CLI with --output-format json** - Not SDK streaming, simpler subprocess model
2. **Extract session_id from JSON result** - Enables `--resume` for continuing agent sessions
3. **Use agent.id from repository** - Consistent tracking after repository.create() returns
4. **Handle waiting_for_input status** - Distinct status for AskUserQuestion pauses

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Fixed agent ID tracking consistency**
- **Found during:** Task 2 (test for stop killing subprocess)
- **Issue:** Manager generated local UUID for activeAgents but returned agent.id from repository
- **Fix:** Changed to use agent.id from repository.create() for all tracking
- **Files modified:** src/agent/manager.ts
- **Verification:** All 19 tests pass
- **Committed in:** b718d59 (combined with Task 2)

---

**Total deviations:** 1 auto-fixed (blocking)
**Impact on plan:** Design consistency fix required for correct subprocess tracking. No scope creep.

## Issues Encountered

None

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- AgentManager adapter ready for tRPC integration (04-04)
- All verification checks pass:
  - npm run build succeeds
  - npm test passes 240 tests (19 new for agent manager)
  - ClaudeAgentManager uses CLI with --output-format json
  - Session ID extracted from CLI JSON output
  - Agent names enforced (unique, used for branches)
  - waiting_for_input status handled for AskUserQuestion scenarios
  - Events include agent name

---
*Phase: 04-agent-lifecycle*
*Completed: 2026-01-30*
