docs(04-01): complete agent schema & repository plan

Tasks completed: 3/3
- Add agents table to database schema
- Create AgentRepository port interface
- Create DrizzleAgentRepository adapter with tests

SUMMARY: .planning/phases/04-agent-lifecycle/04-01-SUMMARY.md

.planning/ROADMAP.md

@@ -90,7 +90,7 @@ Plans:
 **Plans**: TBD
 
 Plans:
-- [ ] 04-01: Agent Schema & Repository (Wave 1)
+- [x] 04-01: Agent Schema & Repository (Wave 1)
 - [x] 04-02: AgentManager Port & Events (Wave 1)
 - [ ] 04-03: AgentManager Adapter (Wave 2)
 - [ ] 04-04: tRPC Integration & CLI Commands (Wave 3)
@@ -139,7 +139,7 @@ Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7
 | 1.1. Hexagonal Architecture | 6/6 | Complete | 2026-01-30 |
 | 2. Data Layer | 2/2 | Complete | 2026-01-30 |
 | 3. Git Integration | 2/2 | Complete | 2026-01-30 |
-| 4. Agent Lifecycle | 1/4 | In progress | - |
+| 4. Agent Lifecycle | 2/4 | In progress | - |
 | 5. Task Dispatch | 0/? | Not started | - |
 | 6. Coordination | 0/? | Not started | - |
 | 7. File System UI | 0/? | Not started | - |

.planning/STATE.md

@@ -10,18 +10,18 @@ See: .planning/PROJECT.md (updated 2026-01-30)
 ## Current Position
 
 Phase: 4 of 8 (Agent Lifecycle)
-Plan: 1 of 4 in current phase
+Plan: 2 of 4 in current phase
 Status: In progress
-Last activity: 2026-01-30 — Completed 04-02-PLAN.md
+Last activity: 2026-01-30 — Completed 04-01-PLAN.md
 
-Progress: ███████░ 57%
+Progress: ████████░ 61%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 16
+- Total plans completed: 17
 - Average duration: 3 min
-- Total execution time: 47 min
+- Total execution time: 50 min
 
 **By Phase:**
 
@@ -31,10 +31,10 @@ Progress: ███████░ 57%
 | 1.1 | 6/6 | 15 min | 3 min |
 | 2 | 2/2 | 8 min | 4 min |
 | 3 | 2/2 | 7 min | 4 min |
-| 4 | 1/4 (04-02) | 2 min | 2 min |
+| 4 | 2/4 | 5 min | 3 min |
 
 **Recent Trend:**
-- Last 5 plans: 02-02 (5 min), 03-01 (2 min), 03-02 (5 min), 04-02 (2 min)
+- Last 5 plans: 03-01 (2 min), 03-02 (5 min), 04-02 (2 min), 04-01 (3 min)
 - Trend: Steady
 
 ## Accumulated Context
@@ -68,6 +68,10 @@ Recent decisions affecting current work:
 - 04-02: Human-readable agent names (gastown, chinatown) in addition to IDs
 - 04-02: AgentStatus includes 'waiting_for_input' for AskUserQuestion pauses
 - 04-02: Five agent events covering full lifecycle
+- 04-01: Agent name unique human-readable identifier
+- 04-01: taskId nullable with SET NULL (agent may outlive task)
+- 04-01: sessionId nullable - populated from CLI JSON after first run
+- 04-01: CreateAgentData interface for explicit optional fields
 
 ### Pending Todos
 
@@ -86,5 +90,5 @@ None yet.
 ## Session Continuity
 
 Last session: 2026-01-30
-Stopped at: Completed 04-02-PLAN.md — AgentManager port interface and events
+Stopped at: Completed 04-01-PLAN.md — Agent schema and repository
 Resume file: None

.planning/phases/04-agent-lifecycle/04-01-SUMMARY.md

@@ -0,0 +1,128 @@
+---
+phase: 04-agent-lifecycle
+plan: 01
+subsystem: database
+tags: [drizzle, sqlite, agents, repository, persistence]
+
+# Dependency graph
+requires:
+  - phase: 02-data-layer
+    provides: Database setup, Drizzle ORM, repository patterns
+provides:
+  - agents table in database schema
+  - AgentRepository port interface
+  - DrizzleAgentRepository adapter
+affects: [04-agent-lifecycle, agent-manager]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "Port-adapter pattern for AgentRepository (same as TaskRepository)"
+    - "CreateAgentData interface for explicit optional fields"
+
+key-files:
+  created:
+    - src/db/repositories/agent-repository.ts
+    - src/db/repositories/drizzle/agent.ts
+    - src/db/repositories/drizzle/agent.test.ts
+  modified:
+    - src/db/schema.ts
+    - src/db/repositories/index.ts
+    - src/db/repositories/drizzle/index.ts
+    - src/db/repositories/drizzle/test-helpers.ts
+
+key-decisions:
+  - "Agent name is unique human-readable identifier"
+  - "taskId nullable with onDelete: 'set null' (agent may outlive task)"
+  - "sessionId nullable - populated from CLI JSON output after first run"
+  - "waiting_for_input status for agents paused on AskUserQuestion"
+
+# Metrics
+duration: 3 min
+completed: 2026-01-30
+---
+
+# Phase 04 Plan 01: Agent Schema & Repository Summary
+
+**Agents table with AgentRepository port and DrizzleAgentRepository adapter for agent state persistence**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-01-30T18:58:15Z
+- **Completed:** 2026-01-30T19:01:08Z
+- **Tasks:** 3
+- **Files modified:** 7
+
+## Accomplishments
+
+- Added agents table to database schema with full lifecycle status tracking
+- Created AgentRepository port interface with comprehensive lookup methods
+- Implemented DrizzleAgentRepository adapter with 22 passing tests
+- Established CreateAgentData interface pattern for explicit optional fields
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Add agents table to database schema** - `dfaa510` (feat)
+2. **Task 2: Create AgentRepository port interface** - `eec5f13` (feat)
+3. **Task 3: Create DrizzleAgentRepository adapter with tests** - `25f98fc` (feat)
+
+## Files Created/Modified
+
+- `src/db/schema.ts` - Added agents table, agentsRelations, Agent/NewAgent types
+- `src/db/repositories/agent-repository.ts` - AgentRepository port interface with CreateAgentData
+- `src/db/repositories/drizzle/agent.ts` - DrizzleAgentRepository implementation
+- `src/db/repositories/drizzle/agent.test.ts` - 22 tests covering all operations
+- `src/db/repositories/index.ts` - Export AgentRepository, AgentStatus, CreateAgentData
+- `src/db/repositories/drizzle/index.ts` - Export DrizzleAgentRepository
+- `src/db/repositories/drizzle/test-helpers.ts` - Added agents table SQL
+
+## Decisions Made
+
+- **Agent name unique:** Human-readable identifier (e.g., 'gastown', 'chinatown')
+- **taskId nullable with SET NULL:** Agent may outlive the task it was assigned to
+- **sessionId nullable:** Populated from Claude CLI JSON output after first run
+- **waiting_for_input status:** For agents paused on AskUserQuestion checkpoints
+- **CreateAgentData interface:** Explicit optional fields instead of Omit<> for cleaner API
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 3 - Blocking] Fixed CreateAgentData type definition**
+- **Found during:** Task 3 (DrizzleAgentRepository tests)
+- **Issue:** Using `Omit<Agent, ...>` made optional fields required in TypeScript
+- **Fix:** Created explicit `CreateAgentData` interface with optional fields
+- **Files modified:** src/db/repositories/agent-repository.ts, src/db/repositories/index.ts
+- **Verification:** Build succeeds, 22 tests pass
+- **Committed in:** 25f98fc (combined with Task 3)
+
+---
+
+**Total deviations:** 1 auto-fixed (blocking)
+**Impact on plan:** Type system fix required for usable API. No scope creep.
+
+## Issues Encountered
+
+None
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Agent persistence layer ready for AgentManager adapter (04-03)
+- All verification checks pass:
+  - npm run build succeeds
+  - npm test passes 221 tests (22 new for agent repository)
+  - agents table has correct columns and relations
+  - AgentRepository interface exported
+  - DrizzleAgentRepository exported from drizzle/index.ts
+
+---
+*Phase: 04-agent-lifecycle*
+*Completed: 2026-01-30*