Codewalkers/.planning/phases/01.1-hexagonal-architecture/01.1-03-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
01.1-hexagonal-architecture	03	process	vitest testing events process-lifecycle hexagonal	phase provides 01.1-01 EventBus port interface and domain event types	Comprehensive test coverage for ProcessRegistry and ProcessManager ProcessManager event emission via optional EventBus ProcessSpawned, ProcessStopped, ProcessCrashed events on process lifecycle	01.1-04 01.1-05 01.1-06	added patterns optional-dependency-injection mock-based-testing	created modified src/process/registry.test.ts src/process/manager.test.ts src/process/manager.ts	EventBus is optional parameter for backwards compatibility Events emitted inline (synchronous) - no async event handling needed Mock execa module in tests to avoid spawning real processes	Optional eventBus parameter pattern for event emission Exit handler emits appropriate event based on exit code (stopped vs crashed)	3min	2026-01-30

Phase 1.1 Plan 03: Process Module Testing and Events Summary

Comprehensive test coverage for ProcessRegistry and ProcessManager with domain event emission for process lifecycle coordination

Performance

• Duration: 3 min
• Started: 2026-01-30T13:01:08Z
• Completed: 2026-01-30T13:04:00Z
• Tasks: 2
• Files modified: 3

Accomplishments

• ProcessRegistry fully tested (15 tests covering register, get, getAll, updateStatus, unregister, getByPid, clear)
• ProcessManager fully tested (20 tests covering spawn, stop, stopAll, restart, isRunning, event emission)
• ProcessManager now accepts optional EventBus for domain event emission
• ProcessSpawned event emitted after successful spawn
• ProcessStopped event emitted on normal exit (code 0)
• ProcessCrashed event emitted on non-zero exit with signal

Task Commits

Each task was committed atomically:

1. Task 1: Write unit tests for ProcessRegistry and ProcessManager - b556c10 (test)
2. Task 2: Refactor ProcessManager to emit events via event bus - 3b24cf2 (feat)

Files Created/Modified

• src/process/registry.test.ts - 15 tests for ProcessRegistry CRUD operations
• src/process/manager.test.ts - 20 tests for ProcessManager lifecycle and events
• src/process/manager.ts - Added optional eventBus parameter and event emission

Decisions Made

1. Optional eventBus parameter - Backwards compatible; events only emitted if eventBus provided
2. Synchronous event emission - Events emitted inline during spawn/exit; no async handling needed for in-process bus
3. Mock execa in tests - Avoid spawning real processes; control subprocess behavior via mock

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Process module fully tested with 35 tests
• Event emission enables coordination between modules
• Ready for 01.1-04: Server Event Integration

---

Phase: 01.1-hexagonal-architecture Completed: 2026-01-30