docs(19-01): complete backend API for agent questions plan

Tasks completed: 2/2
- Add getAgentQuestions and listWaitingAgents tRPC procedures
- Export PendingQuestions and QuestionItem types from shared package

SUMMARY: .planning/phases/19-agent-inbox/19-01-SUMMARY.md

.planning/ROADMAP.md

@@ -297,7 +297,7 @@ Plans:
 **Plans**: 4 plans
 
 Plans:
-- [ ] 19-01: Backend API for Agent Questions
+- [x] 19-01: Backend API for Agent Questions
 - [ ] 19-02: InboxList & MessageCard Components
 - [ ] 19-03: QuestionForm & Input Components
 - [ ] 19-04: Inbox Page Assembly
@@ -350,7 +350,7 @@ Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7
 | 16. Frontend Scaffold | v2.0 | 5/5 | Complete | 2026-02-04 |
 | 17. Initiative Dashboard | v2.0 | 4/4 | Complete | 2026-02-04 |
 | 18. Initiative Detail | v2.0 | 4/4 | Complete | 2026-02-04 |
-| 19. Agent Inbox | v2.0 | 0/? | Not started | - |
+| 19. Agent Inbox | v2.0 | 1/4 | In progress | - |
 | 20. Real-time Subscriptions | v2.0 | 0/? | Not started | - |
 | 21. Polish & Integration | v2.0 | 0/? | Not started | - |
 

.planning/STATE.md

@@ -10,9 +10,9 @@ See: .planning/PROJECT.md (updated 2026-02-04)
 ## Current Position
 
 Phase: 19 of 21 (Agent Inbox) - IN PROGRESS
-Plan: 2 of 4 in current phase
-Status: Plan 19-02 complete
-Last activity: 2026-02-04 - Completed 19-02-PLAN.md (InboxList and MessageCard components)
+Plan: 3 of 4 in current phase
+Status: Plan 19-03 complete
+Last activity: 2026-02-04 - Completed 19-03-PLAN.md (QuestionForm & Input Components)
 
 Progress: █████████░ 98%
 
@@ -213,10 +213,15 @@ Recent decisions affecting current work:
 - 18-04: Task counts aggregated via callback from PhaseWithTasks to page-level state
 - 18-04: DecisionList passed empty array — no backend endpoint for decisions yet
 - 18-04: Phase/task dependencies simplified (empty arrays) for v1 — full dependency resolution deferred
+- 19-01: Re-export PendingQuestions/QuestionItem from agent/types.ts via shared package (rootDir=../.. path)
+- 19-01: listWaitingAgents filters agentManager.list() in-memory (agents are in-memory, no DB query needed)
 - 19-02: Inline formatRelativeTime helper in MessageCard (no separate utils file per plan spec)
 - 19-02: Filter/sort as button groups (not dropdowns) for simplicity per plan spec
 - 19-02: Count badge shows total joined entries (not filtered count) to match wireframe "Agent Inbox (3)"
 - 19-02: cn() import from @/lib/utils for className merging (consistent with all other components)
+- 19-03: OptionGroup value is always string (comma-joined for multi-select) for consistent interface
+- 19-03: QuestionForm owns answer state internally via useState (self-contained component)
+- 19-03: allowOther defaults to true per plan spec
 
 ### Pending Todos
 

.planning/phases/19-agent-inbox/19-01-SUMMARY.md

@@ -0,0 +1,88 @@
+---
+phase: 19-agent-inbox
+plan: 01
+subsystem: api
+tags: [trpc, agent-questions, shared-types]
+
+# Dependency graph
+requires:
+  - phase: 18-initiative-detail
+    provides: Frontend scaffold and tRPC client wiring
+provides:
+  - getAgentQuestions tRPC procedure for structured question data
+  - listWaitingAgents tRPC procedure for inbox filtering
+  - PendingQuestions/QuestionItem shared types for frontend
+affects: [19-02-inbox-list, 19-03-question-form, 19-04-inbox-page]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: []
+
+key-files:
+  created: []
+  modified:
+    - src/trpc/router.ts
+    - packages/shared/src/types.ts
+    - packages/shared/src/index.ts
+
+key-decisions:
+  - "Re-export from agent/types.ts (rootDir=../.. allows cross-package import)"
+  - "listWaitingAgents filters in-memory via agentManager.list() (no new DB query needed)"
+
+# Metrics
+duration: 3min
+completed: 2026-02-04
+---
+
+# Phase 19 Plan 01: Backend API for Agent Questions Summary
+
+**Two tRPC procedures (getAgentQuestions, listWaitingAgents) and shared PendingQuestions/QuestionItem type exports for frontend inbox**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-02-04
+- **Completed:** 2026-02-04
+- **Tasks:** 2
+- **Files modified:** 3
+
+## Accomplishments
+- Added `getAgentQuestions` procedure exposing structured question data from AgentManager
+- Added `listWaitingAgents` procedure filtering to `waiting_for_input` status
+- Exported `PendingQuestions` and `QuestionItem` types from `@codewalk-district/shared`
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Add getAgentQuestions and listWaitingAgents tRPC procedures** - `004140e` (feat)
+2. **Task 2: Export PendingQuestions and QuestionItem from shared package** - `47a2bb3` (feat)
+
+## Files Created/Modified
+- `src/trpc/router.ts` - Added getAgentQuestions and listWaitingAgents procedures, updated JSDoc
+- `packages/shared/src/types.ts` - Re-export PendingQuestions and QuestionItem from agent types
+- `packages/shared/src/index.ts` - Added PendingQuestions and QuestionItem to public exports
+
+## Decisions Made
+- Re-export from `../../../src/agent/types.js` works because shared tsconfig has `rootDir: "../.."`
+- `listWaitingAgents` filters `agentManager.list()` in-memory rather than adding a new DB query (agents are in-memory anyway)
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- Both procedures available for frontend consumption via tRPC client
+- Shared types ready for import in inbox components
+- Ready for 19-02-PLAN.md (InboxList & MessageCard Components)
+
+---
+*Phase: 19-agent-inbox*
+*Completed: 2026-02-04*