docs(10-02): complete parallel execution workflow plan

Tasks completed: 3/3
- Create execute-phase.md workflow structure
- Implement dependency analysis step
- Implement parallel spawning and monitoring

SUMMARY: .planning/phases/10-parallel-phase-execution/10-02-SUMMARY.md

.planning/ROADMAP.md

@@ -183,4 +183,4 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6
 | 7. Backfill Existing Summaries | 1/1 | Complete | 2026-01-05 |
 | 8. Improve Roadmap System | 1/1 | Complete | 2026-01-05 |
 | 9. Integrate Verify-Work | 1/1 | Complete | 2026-01-08 |
-| 10. Parallel Phase Execution | 1/4 | In Progress | - |
+| 10. Parallel Phase Execution | 2/4 | In Progress | - |

.planning/STATE.md

@@ -20,18 +20,18 @@
 ## Current Position
 
 Phase: 10 of 10 (Parallel Phase Execution)
-Plan: 1 of 4 in current phase
+Plan: 2 of 4 in current phase
 Status: In progress
-Last activity: 2026-01-12 - Completed 10-01-PLAN.md
+Last activity: 2026-01-12 - Completed 10-02-PLAN.md
 
-Progress: ████████████░ 94% (16 of 17+ plans)
+Progress: ████████████░ 94% (17 of 18+ plans)
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 16
-- Average duration: 3.2 min
-- Total execution time: 51 min
+- Total plans completed: 17
+- Average duration: 3.9 min
+- Total execution time: 66 min
 
 **By Phase:**
 
@@ -46,11 +46,11 @@ Progress: ████████████░ 94% (16 of 17+ plans)
 | 7 | 1 | 4 min | 4 min |
 | 8 | 1 | 1 min | 1 min |
 | 9 | 1 | 3 min | 3 min |
-| 10 | 1 | 11 min | 11 min |
+| 10 | 2 | 26 min | 13 min |
 
 **Recent Trend:**
-- Last 5 plans: 07-01 (4m), 08-01 (1m), 09-01 (3m), 10-01 (11m)
-- Trend: 10-01 longer due to many file updates
+- Last 5 plans: 08-01 (1m), 09-01 (3m), 10-01 (11m), 10-02 (15m)
+- Trend: 10-02 longer due to workflow complexity (956 lines)
 
 *Updated after each plan completion*
 
@@ -99,5 +99,5 @@ Drift notes: None
 ## Session Continuity
 
 Last session: 2026-01-12
-Stopped at: Completed 10-01-PLAN.md
+Stopped at: Completed 10-02-PLAN.md
 Resume file: None

.planning/phases/10-parallel-phase-execution/10-02-SUMMARY.md

@@ -0,0 +1,97 @@
+---
+phase: 10-parallel-phase-execution
+plan: 02
+subsystem: infra
+tags: [workflow, parallel-execution, subagent, Task-tool, orchestrator]
+
+# Dependency graph
+requires:
+  - phase: 10-parallel-phase-execution
+    provides: execute-plan.md renamed from execute-phase.md
+provides:
+  - execute-phase.md workflow for parallel phase execution
+  - Dependency analysis with topological sort wave calculation
+  - Parallel agent spawning with Task tool
+  - Orchestrator commit handling with merge conflict detection
+affects: [10-03, 10-04, execute-phase]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: [parallel-agent-orchestration, wave-based-execution, orchestrator-commits]
+
+key-files:
+  created: [get-shit-done/workflows/execute-phase.md]
+  modified: []
+
+key-decisions:
+  - "Agents don't commit - orchestrator batches commits"
+  - "Wave-based execution with topological sort"
+  - "Merge conflict detection as failsafe"
+
+patterns-established:
+  - "Parallel agent spawn prompt with PARALLEL_AGENT_COMPLETE report format"
+  - "TaskOutput polling loop for monitoring"
+  - "check_and_spawn_dependents for wave progression"
+
+issues-created: []
+
+# Metrics
+duration: 15min
+completed: 2026-01-12
+---
+
+# Phase 10 Plan 02: Create Parallel Execution Workflow Summary
+
+**Created execute-phase.md workflow with 9 steps for intelligent parallelization: dependency analysis, wave calculation, parallel agent spawning via Task tool, and orchestrator commit handling**
+
+## Performance
+
+- **Duration:** 15 min
+- **Started:** 2026-01-12T18:51:58Z
+- **Completed:** 2026-01-12T19:07:23Z
+- **Tasks:** 3
+- **Files modified:** 1 (created)
+
+## Accomplishments
+- Created 956-line execute-phase.md workflow with complete parallel execution logic
+- Implemented dependency analysis with frontmatter + `<files>` extraction and topological sort
+- Built wave-based execution model (Wave 1 parallel, Wave 2+ waits for dependencies)
+- Added parallel agent spawning with Task tool run_in_background, XML prompt format
+- Implemented monitor_parallel_completion with TaskOutput polling and dependent spawning
+- Added orchestrator_commit with merge conflict detection failsafe
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create execute-phase.md workflow structure** - `af7720c` (feat)
+2. **Task 2: Implement dependency analysis step** - `caf2810` (feat)
+3. **Task 3: Implement parallel spawning and monitoring** - `511def7` (feat)
+
+**Plan metadata:** TBD (docs: complete plan)
+
+## Files Created/Modified
+- `get-shit-done/workflows/execute-phase.md` - New workflow for parallel phase execution (956 lines)
+
+## Decisions Made
+- Agents don't commit - orchestrator collects all changes and commits per-plan in order
+- Wave-based topological sort for dependency ordering
+- Merge conflict detection as failsafe (dependency analysis should prevent, but edge cases exist)
+- PARALLEL_AGENT_COMPLETE report format for structured agent output parsing
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+None
+
+## Next Phase Readiness
+- Ready for 10-03-PLAN.md (create execute-phase command + config)
+- execute-phase.md workflow complete with all 9 steps
+- Parallelization config schema defined in workflow (to be formalized in templates/config.json)
+
+---
+*Phase: 10-parallel-phase-execution*
+*Completed: 2026-01-12*