---
phase: 12-phase-task-decomposition
plan: 04
subsystem: api
tags: [trpc, plan, task, bulk-create, dependencies, repository]

# Dependency graph
requires:
  - phase: 12-02
    provides: PlanRepository.getNextNumber, PlanRepository.findByPhaseId
  - phase: 11-04
    provides: tRPC procedure patterns, Initiative/Phase CRUD
provides:
  - PlanRepository in tRPC context
  - Plan CRUD tRPC procedures (createPlan, listPlans, getPlan, updatePlan)
  - createTasksFromDecomposition bulk task creation procedure
  - TaskRepository.createDependency method
affects: [decompose-agent, cli-commands, task-workflow]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - Bulk entity creation with dependency mapping
    - Number-to-ID mapping for reference resolution

key-files:
  created: []
  modified:
    - src/trpc/context.ts
    - src/trpc/router.ts
    - src/db/repositories/task-repository.ts
    - src/db/repositories/drizzle/task.ts

key-decisions:
  - "Extended TaskRepository with createDependency method for hexagonal architecture compliance"
  - "createTasksFromDecomposition maps task numbers to IDs for dependency creation"

# Metrics
duration: 4min
completed: 2026-02-01
---

# Phase 12 Plan 04: Plan & Task tRPC Procedures Summary

**Added tRPC procedures for Plan CRUD and bulk task creation from decomposition agent output with dependency mapping**

## Performance

- **Duration:** 4 min
- **Started:** 2026-02-01T10:43:59Z
- **Completed:** 2026-02-01T10:47:30Z
- **Tasks:** 3
- **Files modified:** 4

## Accomplishments

- Added PlanRepository to tRPC context with optional injection
- Implemented Plan CRUD procedures: createPlan (with auto-number), listPlans, getPlan, updatePlan
- Added createTasksFromDecomposition procedure for bulk task creation from decompose agent output
- Extended TaskRepository interface with createDependency method for task dependencies

## Task Commits

Each task was committed atomically:

1. **Task 1: Add PlanRepository to tRPC context** - `c98e9df` (feat)
2. **Task 2: Add Plan tRPC procedures** - `6127445` (feat)
3. **Task 3: Add createTasksFromDecomposition procedure** - `66ad2ec` (feat)

## Files Created/Modified

- `src/trpc/context.ts` - Added PlanRepository type to context
- `src/trpc/router.ts` - Added Plan CRUD procedures and createTasksFromDecomposition
- `src/db/repositories/task-repository.ts` - Added createDependency method to interface
- `src/db/repositories/drizzle/task.ts` - Implemented createDependency in Drizzle adapter

## Decisions Made

1. **Extended TaskRepository with createDependency** - Required for createTasksFromDecomposition to create task dependencies while maintaining hexagonal architecture (repositories as ports, not direct DB access in tRPC layer)
2. **Number-to-ID mapping for dependencies** - Decomposition output uses task numbers (1, 2, 3...) for dependencies, which get mapped to actual task IDs after creation

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Added createDependency to TaskRepository**
- **Found during:** Task 3 (createTasksFromDecomposition implementation)
- **Issue:** Plan required creating task_dependencies after tasks, but TaskRepository had no method for this
- **Fix:** Added createDependency(taskId, dependsOnTaskId) to TaskRepository interface and DrizzleTaskRepository
- **Files modified:** src/db/repositories/task-repository.ts, src/db/repositories/drizzle/task.ts
- **Verification:** Build passes, all 402 tests pass
- **Committed in:** 66ad2ec (Task 3 commit)

---

**Total deviations:** 1 (blocking - needed createDependency method)
**Impact on plan:** Essential addition for dependency creation. Maintains hexagonal architecture. No scope creep.

## Issues Encountered

None - all procedures implemented successfully, all 402 tests pass.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Full Plan and Task tRPC layer ready for CLI
- createPlan, listPlans, getPlan, updatePlan available
- createTasksFromDecomposition handles bulk task creation with dependencies
- Ready for 12-05-PLAN.md (Decompose Agent Handler)

---
*Phase: 12-phase-task-decomposition*
*Completed: 2026-02-01*
