docs(12-06): complete Plan CLI Commands & Architect Decompose plan

- Add 12-06-SUMMARY.md documenting plan and architect CLI commands
- Update STATE.md position to plan 6/8 and 47 plans completed

.planning/STATE.md

@@ -10,18 +10,18 @@ See: .planning/PROJECT.md (updated 2026-01-31)
 ## Current Position
 
 Phase: 12 of 13 (Phase Task Decomposition)
-Plan: 5 of 8 in current phase
+Plan: 6 of 8 in current phase
 Status: In progress
-Last activity: 2026-02-01 — Completed 12-05-PLAN.md
+Last activity: 2026-02-01 — Completed 12-06-PLAN.md
 
-Progress: ██████░░░░ 64%
+Progress: ██████░░░░ 67%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 46
+- Total plans completed: 47
 - Average duration: 3 min
-- Total execution time: 148 min
+- Total execution time: 151 min
 
 **By Phase (v1.0):**
 
@@ -154,6 +154,8 @@ Recent decisions affecting current work:
 - 12-04: createTasksFromDecomposition maps task numbers to IDs for dependency creation
 - 12-05: buildDecomposePrompt takes Plan and Phase (not Initiative) to provide plan-level context
 - 12-05: spawnArchitectDecompose associates with planId (not initiativeId) matching decompose scope
+- 12-06: Architect decompose added as subcommand under existing architect group (consistent with discuss/breakdown)
+- 12-06: Plan commands follow same pattern as initiative commands for consistency
 
 ### Pending Todos
 
@@ -174,5 +176,5 @@ None.
 ## Session Continuity
 
 Last session: 2026-02-01
-Stopped at: Completed 12-05-PLAN.md (Decompose Prompts & Spawn Procedure)
+Stopped at: Completed 12-06-PLAN.md (Plan CLI Commands & Architect Decompose)
 Resume file: None

.planning/phases/12-phase-task-decomposition/12-06-SUMMARY.md

@@ -0,0 +1,96 @@
+---
+phase: 12-phase-task-decomposition
+plan: 06
+subsystem: cli
+tags: [commander, trpc-client, plan-management, architect, decompose]
+
+# Dependency graph
+requires:
+  - phase: 12-04
+    provides: Plan tRPC procedures (createPlan, listPlans, getPlan, updatePlan)
+  - phase: 12-05
+    provides: spawnArchitectDecompose tRPC procedure, buildDecomposePrompt
+  - phase: 11-06
+    provides: CLI command patterns (initiative, architect discuss, breakdown)
+provides:
+  - Plan CLI commands (list, create, get, tasks)
+  - Architect decompose CLI command
+affects: [decompose-workflow, user-cli, plan-execution]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - Plan CLI command group following initiative pattern
+    - Architect subcommand for decompose mode
+
+key-files:
+  created: []
+  modified:
+    - src/cli/index.ts
+
+key-decisions:
+  - "Architect decompose added as subcommand under existing architect group (consistent with discuss/breakdown)"
+  - "Plan commands follow same pattern as initiative commands for consistency"
+
+# Metrics
+duration: 3min
+completed: 2026-02-01
+---
+
+# Phase 12 Plan 06: Plan CLI Commands & Architect Decompose Summary
+
+**CLI commands for plan management (list, create, get, tasks) and architect decompose workflow**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-02-01T11:50:00Z
+- **Completed:** 2026-02-01T11:53:00Z
+- **Tasks:** 2
+- **Files modified:** 1
+
+## Accomplishments
+
+- Added plan command group with list, create, get, tasks subcommands
+- Added architect decompose command to spawn agent in decompose mode
+- Full CLI for plan management and decompose workflow
+
+## Task Commits
+
+Both tasks were in the same file, committed together:
+
+1. **Task 1: Add plan CLI commands** - `6a2b835` (feat)
+2. **Task 2: Add architect decompose command** - `6a2b835` (feat)
+
+## Files Created/Modified
+
+- `src/cli/index.ts` - Added plan command group and architect decompose command
+
+## Decisions Made
+
+1. **Architect decompose as subcommand** - Added under existing architect group for consistency with discuss and breakdown commands
+2. **Plan commands follow initiative pattern** - Used same structure (list, create, get, tasks) for consistency
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None - 12-05 (the dependency) was already completed and committed, all procedures available.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Full CLI available for plan management workflow
+- cw plan list, create, get, tasks ready for use
+- cw architect decompose ready to spawn decompose agents
+- Ready for 12-07-PLAN.md (Decompose Handler & E2E Tests)
+
+---
+*Phase: 12-phase-task-decomposition*
+*Completed: 2026-02-01*