---
phase: 05-task-dispatch
plan: 04
subsystem: dispatch
tags: [dispatch, queue, events, dependency, hexagonal]

# Dependency graph
requires:
  - phase: 05-01
    provides: MessageRepository for agent-user communication
  - phase: 05-03
    provides: DispatchManager port interface
provides:
  - DefaultDispatchManager adapter implementation
  - In-memory task queue with priority ordering
  - Dependency-checking dispatch algorithm
  - Task lifecycle event emission
affects: [05-05]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "In-memory queue for task dispatch management"
    - "Priority-first, FIFO-secondary ordering"
    - "Port-adapter pattern for DispatchManager"

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

key-decisions:
  - "In-memory Map for queue (no persistent queue needed for v1)"
  - "Dependency checking via taskRepository.findById status check"
  - "Agent name generated from taskId prefix"

patterns-established:
  - "Task dispatch via priority then FIFO ordering"
  - "Event emission for all task state transitions"

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

# Phase 5 Plan 04: DispatchManager Adapter Summary

**DefaultDispatchManager adapter with dependency checking, priority-ordered dispatch, and 14 comprehensive tests**

## Performance

- **Duration:** 4 min
- **Started:** 2026-01-30T20:38:00Z
- **Completed:** 2026-01-30T20:43:00Z
- **Tasks:** 3
- **Files modified:** 3

## Accomplishments

- Implemented DefaultDispatchManager adapter implementing DispatchManager interface
- Built in-memory task queue with priority (high > medium > low) and FIFO ordering
- Implemented dependency checking algorithm for dispatch readiness
- Added all four task lifecycle events (queued, dispatched, completed, blocked)
- Created 14 comprehensive tests covering all dispatch scenarios

## Task Commits

Each task was committed atomically:

1. **Task 1: Implement dependency checking algorithm** - `e924fb6` (feat)
2. **Task 2: Implement dispatchNext and queue state** - `e924fb6` (included in Task 1 - single file implementation)
3. **Task 3: Add tests and wire up exports** - `364ffc3` (test)

## Files Created/Modified

- `src/dispatch/manager.ts` - DefaultDispatchManager implementation with queue management
- `src/dispatch/manager.test.ts` - 14 tests for queue, dispatch, and dependency scenarios
- `src/dispatch/index.ts` - Export DefaultDispatchManager from dispatch module

## Decisions Made

1. **In-memory Map for queue**: Simple Map-based queue is sufficient for v1. Persistent queue can be added later if needed.
2. **Dependency checking via repository**: Check task status via taskRepository.findById rather than maintaining separate state.
3. **Agent name from taskId**: Generate agent names like `agent-{taskId.slice(0,6)}` for simple identification.
4. **Tasks 1 & 2 combined**: dispatchNext and queue state are tightly coupled to the core algorithm, implemented in single file.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- DefaultDispatchManager ready for integration with server and CLI
- All dispatch events available for coordination workflows
- Queue state visibility enables dispatch monitoring
- Ready for 05-05 (Message & Dispatch CLI commands)

---
*Phase: 05-task-dispatch*
*Completed: 2026-01-30*
