docs(10-03): complete execute-phase command plan

Tasks completed: 3/3
- Create execute-phase command
- Add parallelization config to config.json template
- Update documentation

SUMMARY: .planning/phases/10-parallel-phase-execution/10-03-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 | 2/4 | In Progress | - |
+| 10. Parallel Phase Execution | 3/4 | In Progress | - |

.planning/STATE.md

@@ -20,18 +20,18 @@
 ## Current Position
 
 Phase: 10 of 10 (Parallel Phase Execution)
-Plan: 2 of 4 in current phase
+Plan: 3 of 4 in current phase
 Status: In progress
-Last activity: 2026-01-12 - Completed 10-02-PLAN.md
+Last activity: 2026-01-12 - Completed 10-03-PLAN.md
 
-Progress: ████████████░ 94% (17 of 18+ plans)
+Progress: ████████████░ 95% (18 of 19 plans)
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 17
+- Total plans completed: 18
 - Average duration: 3.9 min
-- Total execution time: 66 min
+- Total execution time: 70 min
 
 **By Phase:**
 
@@ -46,11 +46,11 @@ Progress: ████████████░ 94% (17 of 18+ plans)
 | 7 | 1 | 4 min | 4 min |
 | 8 | 1 | 1 min | 1 min |
 | 9 | 1 | 3 min | 3 min |
-| 10 | 2 | 26 min | 13 min |
+| 10 | 3 | 30 min | 10 min |
 
 **Recent Trend:**
-- 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)
+- Last 5 plans: 09-01 (3m), 10-01 (11m), 10-02 (15m), 10-03 (4m)
+- Trend: 10-03 faster (command + config + docs, no workflow logic)
 
 *Updated after each plan completion*
 
@@ -99,5 +99,5 @@ Drift notes: None
 ## Session Continuity
 
 Last session: 2026-01-12
-Stopped at: Completed 10-02-PLAN.md
+Stopped at: Completed 10-03-PLAN.md
 Resume file: None

.planning/phases/10-parallel-phase-execution/10-03-SUMMARY.md

@@ -0,0 +1,98 @@
+---
+phase: 10-parallel-phase-execution
+plan: 03
+subsystem: commands
+tags: [slash-command, parallelization, config, documentation]
+
+requires:
+  - phase: 10-01
+    provides: renamed execute-plan workflow
+  - phase: 10-02
+    provides: execute-phase.md parallel workflow
+
+provides:
+  - /gsd:execute-phase slash command
+  - parallelization config schema in config.json
+  - command documentation in README.md and help.md
+
+affects: [users, config, workflow]
+
+tech-stack:
+  added: []
+  patterns: [config-schema-extension, command-workflow-separation]
+
+key-files:
+  created:
+    - commands/gsd/execute-phase.md
+  modified:
+    - get-shit-done/templates/config.json
+    - README.md
+    - commands/gsd/help.md
+
+key-decisions:
+  - "Config schema uses parallelization section with plan_level/task_level for future extensibility"
+  - "Documentation explains when to use execute-plan vs execute-phase"
+
+patterns-established:
+  - "Command files delegate to workflow files for execution logic"
+
+issues-created: []
+
+duration: 4min
+completed: 2026-01-12
+---
+
+# Phase 10 Plan 03: Create Execute-Phase Command Summary
+
+**New /gsd:execute-phase command with parallelization config and documentation for parallel "walk away" phase execution.**
+
+## Performance
+
+- **Duration:** 4 min
+- **Started:** 2026-01-12T19:45:00Z
+- **Completed:** 2026-01-12T19:49:00Z
+- **Tasks:** 3
+- **Files modified:** 4
+
+## Accomplishments
+
+- Created /gsd:execute-phase slash command that references execute-phase.md workflow
+- Added parallelization configuration section to config.json template
+- Updated README.md and help.md with new command documentation
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create execute-phase command** - `18a1fd1` (feat)
+2. **Task 2: Add parallelization config to config.json template** - `8b8b5d6` (feat)
+3. **Task 3: Update documentation** - `b372905` (docs)
+
+## Files Created/Modified
+
+- `commands/gsd/execute-phase.md` - New slash command for parallel phase execution
+- `get-shit-done/templates/config.json` - Added parallelization section with 6 config options
+- `README.md` - Added execute-phase to command table and explained when to use each
+- `commands/gsd/help.md` - Added full usage entry with config options
+
+## Decisions Made
+
+- Config schema uses dedicated `parallelization` section with `plan_level`/`task_level` flags for future extensibility
+- Documentation explicitly explains when to use `/gsd:execute-plan` vs `/gsd:execute-phase`
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## Next Phase Readiness
+
+- Execute-phase command available for parallel phase execution
+- Ready for 10-04: agent-history schema extension
+
+---
+*Phase: 10-parallel-phase-execution*
+*Completed: 2026-01-12*