docs: create milestone v1.3 Parallel Execution & UI Design (2 phases)

Phases:
- 14. Parallel Phase Execution: add phase dependencies, concurrent execution
- 15. Frontend Wireframes: markdown diagrams for UI screens

.planning/ROADMAP.md

@@ -13,6 +13,7 @@ None
 - ✅ **v1.0 Core System** - Phases 1-6 (shipped 2026-01-30)
 - ✅ **v1.1 Test Infrastructure** - Phases 7-9 (shipped 2026-01-31)
 - ✅ **v1.2 Architect & Multi-Question** - Phases 10-13 (shipped 2026-02-02)
+- 🚧 **v1.3 Parallel Execution & UI Design** - Phases 14-15 (in progress)
 
 ## Phases
 
@@ -206,10 +207,34 @@ Plans:
 
 </details>
 
+### 🚧 v1.3 Parallel Execution & UI Design (In Progress)
+
+**Milestone Goal:** Enable parallel phase execution and design the frontend UI with markdown wireframes
+
+#### Phase 14: Parallel Phase Execution
+
+**Goal**: Add dependencies to phases (same pattern as tasks), enable concurrent execution of independent phases
+**Depends on**: Phase 13 (v1.2 complete)
+**Research**: Unlikely (extends existing task dependency patterns)
+**Plans**: TBD
+
+Plans:
+- [ ] 14-01: TBD (run /gsd:plan-phase 14 to break down)
+
+#### Phase 15: Frontend Wireframes
+
+**Goal**: Markdown diagrams for initiative dashboard, phase/task breakdown, and agent inbox UI screens
+**Depends on**: Phase 14
+**Research**: Unlikely (markdown documentation)
+**Plans**: TBD
+
+Plans:
+- [ ] 15-01: TBD (run /gsd:plan-phase 15 to break down)
+
 ## Progress
 
 **Execution Order:**
-Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 8.1 → 9
+Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 8.1 → 9 → 10 → 11 → 12 → 13 → 14 → 15
 
 | Phase | Milestone | Plans Complete | Status | Completed |
 |-------|-----------|----------------|--------|-----------|
@@ -228,6 +253,8 @@ Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7
 | 11. Architect Agent | v1.2 | 8/8 | Complete | 2026-01-31 |
 | 12. Phase-Task Decomposition | v1.2 | 8/8 | Complete | 2026-02-01 |
 | 13. Real Claude E2E Tests | v1.2 | 1/1 | Complete | 2026-02-02 |
+| 14. Parallel Phase Execution | v1.3 | 0/? | Not started | - |
+| 15. Frontend Wireframes | v1.3 | 0/? | Not started | - |
 
 ---
 *Roadmap created: 2026-01-30*

.planning/STATE.md

@@ -9,12 +9,12 @@ See: .planning/PROJECT.md (updated 2026-02-02)
 
 ## Current Position
 
-Phase: v1.2 complete
-Plan: N/A
-Status: Ready to plan next milestone
-Last activity: 2026-02-02 — v1.2 milestone archived
+Phase: 14 of 15 (Parallel Phase Execution)
+Plan: Not started
+Status: Ready to plan
+Last activity: 2026-02-02 — Milestone v1.3 created
 
-Progress: ██████████ 100% (v1.2)
+Progress: ░░░░░░░░░░ 0%
 
 ## Performance Metrics
 
@@ -173,6 +173,7 @@ None yet.
   - Establishes architectural foundation for rest of project
 - Milestone v1.1 created: Test infrastructure, 3 phases (Phase 7-9)
 - Milestone v1.2 created: Architect & Multi-Question, 4 phases (Phase 10-13)
+- Milestone v1.3 created: Parallel Execution & UI Design, 2 phases (Phase 14-15)
 
 ### Blockers/Concerns
 
@@ -181,5 +182,5 @@ None.
 ## Session Continuity
 
 Last session: 2026-02-02
-Stopped at: Archived v1.2 milestone
+Stopped at: Milestone v1.3 initialization
 Resume file: None