docs(16-02): complete shared types package plan

Tasks completed: 1/1
- Create shared types package (@codewalk-district/shared)

SUMMARY: .planning/phases/16-frontend-scaffold/16-02-SUMMARY.md

.planning/ROADMAP.md

@@ -254,10 +254,14 @@ Plans:
 **Depends on**: Phase 15 (v1.3 complete)
 **Research**: Likely (new tech stack setup)
 **Research topics**: Vite monorepo setup, @trpc/react-query client configuration, shadcn/ui installation
-**Plans**: TBD
+**Plans**: 5 plans
 
 Plans:
-- [ ] 16-01: TBD (run /gsd:plan-phase 16 to break down)
+- [ ] 16-01: Vite + React + Tailwind + shadcn/ui
+- [x] 16-02: Shared Types Package
+- [ ] 16-03: tRPC Client Wiring
+- [ ] 16-04: React Router Setup
+- [ ] 16-05: Dev Server Integration
 
 #### Phase 17: Initiative Dashboard
 
@@ -334,7 +338,7 @@ Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7
 | 13. Real Claude E2E Tests | v1.2 | 1/1 | Complete | 2026-02-02 |
 | 14. Parallel Phase Execution | v1.3 | 8/8 | Complete | 2026-02-02 |
 | 15. Frontend Wireframes | v1.3 | 3/3 | Complete | 2026-02-02 |
-| 16. Frontend Scaffold | v2.0 | 0/? | Not started | - |
+| 16. Frontend Scaffold | v2.0 | 1/5 | In progress | - |
 | 17. Initiative Dashboard | v2.0 | 0/? | Not started | - |
 | 18. Initiative Detail | v2.0 | 0/? | Not started | - |
 | 19. Agent Inbox | v2.0 | 0/? | Not started | - |

.planning/STATE.md

@@ -10,11 +10,11 @@ See: .planning/PROJECT.md (updated 2026-02-04)
 ## Current Position
 
 Phase: 16 of 21 (Frontend Scaffold)
-Plan: Not started
+Plan: 2 of 5 in current phase
-Status: Ready to plan
+Status: In progress
-Last activity: 2026-02-04 - Milestone v2.0 Frontend created
+Last activity: 2026-02-04 - Completed 16-02-PLAN.md
 
-Progress: ░░░░░░░░░░ 0%
+Progress: █████████░ 94%
 
 ## Performance Metrics
 
@@ -178,6 +178,8 @@ Recent decisions affecting current work:
 - 14-06: Commands use inline definition pattern (same as all other CLI commands in index.ts)
 - 14-08: PhaseDispatchManager wired into TestHarness following DispatchManager pattern
 - 14-08: E2E tests cover 4 core scenarios: independent, sequential, diamond, blocked
+- 16-02: Shared types package uses rootDir=../.. (no composite) for relative imports into backend
+- 16-02: skipLibCheck avoids drizzle-orm third-party declaration errors in shared package
 
 ### Pending Todos
 
@@ -200,5 +202,5 @@ None.
 ## Session Continuity
 
 Last session: 2026-02-04
-Stopped at: Milestone v2.0 Frontend initialization
+Stopped at: Completed 16-02-PLAN.md
 Resume file: None

.planning/phases/16-frontend-scaffold/16-02-SUMMARY.md

@@ -0,0 +1,110 @@
+---
+phase: 16-frontend-scaffold
+plan: 02
+subsystem: infra
+tags: [typescript, trpc, monorepo, shared-types]
+
+# Dependency graph
+requires:
+  - phase: 02-data-layer
+    provides: DB entity types (Initiative, Phase, Plan, Task, Agent, Message)
+  - phase: 01.1-hexagonal-architecture
+    provides: tRPC AppRouter type
+provides:
+  - "@codewalk-district/shared package exporting AppRouter and entity types"
+  - "Type-safe imports for frontend consumers"
+affects: [17-initiative-dashboard, 18-initiative-detail, 19-agent-inbox, 16-03-trpc-client]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: ["shared types package for monorepo type sharing via relative re-exports"]
+
+key-files:
+  created:
+    - packages/shared/package.json
+    - packages/shared/tsconfig.json
+    - packages/shared/src/index.ts
+    - packages/shared/src/trpc.ts
+    - packages/shared/src/types.ts
+  modified:
+    - package-lock.json
+
+key-decisions:
+  - "Dropped composite from tsconfig — no build step, consumed directly via TypeScript"
+  - "Set rootDir to ../.. so tsc resolves relative imports into backend source without rootDir violations"
+  - "Added skipLibCheck to avoid drizzle-orm third-party type errors in gel/mysql modules"
+
+# Metrics
+duration: 3min
+completed: 2026-02-04
+---
+
+# Phase 16 Plan 02: Shared Types Package Summary
+
+**@codewalk-district/shared package exporting AppRouter and entity types via relative re-exports for frontend consumption**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-02-04T17:54:00Z
+- **Completed:** 2026-02-04T17:57:00Z
+- **Tasks:** 1
+- **Files modified:** 6
+
+## Accomplishments
+- Created packages/shared/ with type-only re-exports for AppRouter and DB entity types
+- Frontend can now import types from @codewalk-district/shared instead of reaching into backend internals
+- TypeScript compiles cleanly in both shared package and root project
+- All 452 existing tests pass with no regressions
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create shared types package** - `4a37371` (feat)
+
+## Files Created/Modified
+- `packages/shared/package.json` - Package manifest for @codewalk-district/shared
+- `packages/shared/tsconfig.json` - TypeScript config with rootDir set to repo root for relative imports
+- `packages/shared/src/index.ts` - Barrel export of AppRouter and entity types
+- `packages/shared/src/trpc.ts` - Re-exports AppRouter from backend router
+- `packages/shared/src/types.ts` - Re-exports Initiative, Phase, Plan, Task, Agent, Message from schema
+- `package-lock.json` - Updated with workspace linking
+
+## Decisions Made
+- 16-02: Dropped `composite: true` from tsconfig since package has no build step (consumed directly via TypeScript)
+- 16-02: Set `rootDir: "../.."` to allow TypeScript to resolve relative imports into backend source without rootDir violations
+- 16-02: Added `skipLibCheck: true` to avoid drizzle-orm third-party declaration errors (gel/mysql modules)
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 3 - Blocking] Fixed TypeScript rootDir and composite configuration**
+- **Found during:** Task 1 (TypeScript compilation verification)
+- **Issue:** Plan specified `composite: true` but tsc with composite requires all referenced files under rootDir. Relative imports into `../../src/` caused rootDir violations and file-not-in-project errors.
+- **Fix:** Removed `composite`, set `rootDir: "../.."`, added `skipLibCheck: true`
+- **Files modified:** packages/shared/tsconfig.json
+- **Verification:** `npx tsc --noEmit` passes in both shared package and root project
+- **Committed in:** 4a37371 (part of task commit)
+
+---
+
+**Total deviations:** 1 auto-fixed (1 blocking)
+**Impact on plan:** Auto-fix necessary for TypeScript compilation. No scope creep.
+
+## Issues Encountered
+None
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- Shared types package ready for tRPC client wiring in Plan 03
+- AppRouter type importable from @codewalk-district/shared
+- Entity types importable for component props
+
+---
+*Phase: 16-frontend-scaffold*
+*Completed: 2026-02-04*