docs(11-05): complete agent prompts plan

Tasks completed: 3/3
- Update spawnAgent to support mode
- Create comprehensive agent prompts module
- Add spawnArchitect tRPC procedures

SUMMARY: .planning/phases/11-architect-agent/11-05-SUMMARY.md

.planning/ROADMAP.md

@@ -168,7 +168,7 @@ Plans:
 - [x] 11-02: Initiative & Phase Repositories
 - [x] 11-03: ClaudeAgentManager Mode Support
 - [x] 11-04: Initiative & Phase tRPC Procedures
-- [ ] 11-05: Architect Spawn Procedures
+- [x] 11-05: Architect Spawn Procedures
 - [ ] 11-06: CLI Commands
 - [ ] 11-07: Unit Tests
 - [ ] 11-08: E2E Tests
@@ -211,7 +211,7 @@ Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7
 | 8.1. Agent Output Schema | v1.1 | 2/2 | Complete | 2026-01-31 |
 | 9. Extended Scenarios | v1.1 | 2/2 | Complete | 2026-01-31 |
 | 10. Multi-Question Schema | v1.2 | 4/4 | Complete | 2026-01-31 |
-| 11. Architect Agent | v1.2 | 4/8 | In progress | - |
+| 11. Architect Agent | v1.2 | 5/8 | In progress | - |
 | 12. Phase-Task Decomposition | v1.2 | 0/? | Not started | - |
 | 13. Real Claude E2E Tests | v1.2 | 0/? | Not started | - |
 

.planning/STATE.md

@@ -10,11 +10,11 @@ See: .planning/PROJECT.md (updated 2026-01-31)
 ## Current Position
 
 Phase: 11 of 13 (Architect Agent)
-Plan: 4 of 8 in current phase
+Plan: 5 of 8 in current phase
 Status: In progress
-Last activity: 2026-01-31 — Completed 11-03-PLAN.md
+Last activity: 2026-01-31 — Completed 11-05-PLAN.md
 
-Progress: █████░░░░░ 45%
+Progress: █████░░░░░ 48%
 
 ## Performance Metrics
 
@@ -136,6 +136,9 @@ Recent decisions affecting current work:
 - 11-03: Resume uses mode-specific JSON schema for resumed sessions
 - 11-04: Repositories optional in tRPC context following existing pattern (agentManager, taskRepository)
 - 11-04: createPhasesFromBreakdown accepts pre-numbered phases for Architect breakdown output
+- 11-05: Prompts exported from dedicated module for reusability
+- 11-05: buildExecutePrompt takes taskDescription, not Initiative (worker agents work on tasks)
+- 11-05: Architect procedures validate initiative exists before spawning
 
 ### Pending Todos
 
@@ -156,5 +159,5 @@ None.
 ## Session Continuity
 
 Last session: 2026-01-31
-Stopped at: Completed 11-03-PLAN.md (Mode-Aware Agent Spawning)
+Stopped at: Completed 11-05-PLAN.md (Agent Prompts Module)
 Resume file: None

.planning/phases/11-architect-agent/11-05-SUMMARY.md

@@ -0,0 +1,106 @@
+---
+phase: 11-architect-agent
+plan: 05
+subsystem: agent
+tags: [agent-prompts, trpc, architect, discuss-mode, breakdown-mode, execute-mode]
+
+# Dependency graph
+requires:
+  - phase: 11-03
+    provides: Mode-aware agent spawning, mode-specific completion handlers
+  - phase: 11-04
+    provides: Initiative and Phase tRPC procedures, repository context injection
+provides:
+  - Comprehensive mode-specific agent prompts module
+  - spawnAgent procedure accepts mode parameter
+  - spawnArchitectDiscuss procedure for context gathering
+  - spawnArchitectBreakdown procedure for phase decomposition
+affects: [11-06, 11-07, 11-08, cli-commands]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "Prompt builder functions with Initiative context injection"
+    - "Architect spawn procedures with initiative validation"
+
+key-files:
+  created:
+    - src/agent/prompts.ts
+  modified:
+    - src/agent/index.ts
+    - src/trpc/router.ts
+
+key-decisions:
+  - "Prompts exported from dedicated module for reusability"
+  - "buildExecutePrompt takes taskDescription, not Initiative (worker agents work on tasks)"
+  - "Architect procedures validate initiative exists before spawning"
+
+patterns-established:
+  - "Prompt builder pattern: function(entity, context?) => comprehensive prompt string"
+
+# Metrics
+duration: 2min
+completed: 2026-01-31
+---
+
+# Phase 11 Plan 05: Agent Prompts Module Summary
+
+**Comprehensive mode-specific agent prompts with architect spawn procedures for discuss and breakdown modes**
+
+## Performance
+
+- **Duration:** 2 min
+- **Started:** 2026-01-31T18:14:36Z
+- **Completed:** 2026-01-31T18:16:56Z
+- **Tasks:** 3
+- **Files modified:** 3
+
+## Accomplishments
+
+- Created prompts module with buildDiscussPrompt, buildBreakdownPrompt, buildExecutePrompt
+- Updated spawnAgent procedure to accept mode parameter
+- Added spawnArchitectDiscuss procedure for context-gathering mode
+- Added spawnArchitectBreakdown procedure for phase decomposition mode
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Update spawnAgent to support mode** - `4843b95` (feat)
+2. **Task 2: Create comprehensive agent prompts module** - `773f6f9` (feat)
+3. **Task 3: Add spawnArchitect tRPC procedures** - `c139859` (feat)
+
+## Files Created/Modified
+
+- `src/agent/prompts.ts` - Comprehensive prompts for discuss, breakdown, and execute modes
+- `src/agent/index.ts` - Export prompts from module index
+- `src/trpc/router.ts` - Mode param on spawnAgent, architect spawn procedures
+
+## Decisions Made
+
+1. **Prompts in dedicated module** - Separate file for reusability across manager implementations
+2. **buildExecutePrompt takes task description** - Worker agents work on tasks, not initiatives
+3. **Architect spawn validates initiative** - Prevents orphaned agents with missing initiative
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Agent prompts module ready for use by CLI commands
+- Architect spawn procedures available via tRPC
+- Ready for 11-06 (Architect CLI Commands) or 11-07 (E2E Tests)
+
+---
+*Phase: 11-architect-agent*
+*Completed: 2026-01-31*