docs: create milestone v2.0 Frontend (6 phases)

Phases:
- 16. frontend-scaffold: Vite project setup, tRPC client, shadcn/ui
- 17. initiative-dashboard: List view with status badges, progress bars
- 18. initiative-detail: Phase/task hierarchy accordion, queue actions
- 19. agent-inbox: Multi-question forms, answer submission, notifications
- 20. real-time-subscriptions: WebSocket transport, subscription hooks
- 21. polish-integration: Navigation, error/loading states, responsive layout

.planning/ROADMAP.md

@@ -14,6 +14,7 @@ None
 - ✅ **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 (shipped 2026-02-02)
+- 🚧 **v2.0 Frontend** - Phases 16-21 (in progress)
 
 ## Phases
 
@@ -243,10 +244,76 @@ Plans:
 
 </details>
 
+### 🚧 v2.0 Frontend (In Progress)
+
+**Milestone Goal:** Build the web UI from v1.3 wireframes using React + Vite with real-time tRPC subscriptions
+
+#### Phase 16: Frontend Scaffold
+
+**Goal**: Vite project setup, tRPC client wiring, router, shared type exports, shadcn/ui config
+**Depends on**: Phase 15 (v1.3 complete)
+**Research**: Likely (new tech stack setup)
+**Research topics**: Vite monorepo setup, @trpc/react-query client configuration, shadcn/ui installation
+**Plans**: TBD
+
+Plans:
+- [ ] 16-01: TBD (run /gsd:plan-phase 16 to break down)
+
+#### Phase 17: Initiative Dashboard
+
+**Goal**: List view with status badges, progress bars, filtering, architect spawn dropdown
+**Depends on**: Phase 16
+**Research**: Unlikely (internal patterns, components from wireframes)
+**Plans**: TBD
+
+Plans:
+- [ ] 17-01: TBD (run /gsd:plan-phase 17 to break down)
+
+#### Phase 18: Initiative Detail
+
+**Goal**: Phase/task hierarchy accordion, dependency indicators, agent assignments, queue actions
+**Depends on**: Phase 17
+**Research**: Unlikely (internal patterns, components from wireframes)
+**Plans**: TBD
+
+Plans:
+- [ ] 18-01: TBD (run /gsd:plan-phase 18 to break down)
+
+#### Phase 19: Agent Inbox
+
+**Goal**: Message list, multi-question forms (radio/checkbox/free-text), answer submission, notifications
+**Depends on**: Phase 18
+**Research**: Unlikely (internal patterns, form handling from wireframes)
+**Plans**: TBD
+
+Plans:
+- [ ] 19-01: TBD (run /gsd:plan-phase 19 to break down)
+
+#### Phase 20: Real-time Subscriptions
+
+**Goal**: WebSocket transport on tRPC server, subscription hooks, live status updates
+**Depends on**: Phase 19
+**Research**: Likely (tRPC WebSocket subscriptions)
+**Research topics**: @trpc/server WebSocket adapter, subscription patterns, reconnection handling
+**Plans**: TBD
+
+Plans:
+- [ ] 20-01: TBD (run /gsd:plan-phase 20 to break down)
+
+#### Phase 21: Polish & Integration
+
+**Goal**: Cross-screen navigation, error states, loading states, responsive layout, integration testing
+**Depends on**: Phase 20
+**Research**: Unlikely (polish and integration of existing screens)
+**Plans**: TBD
+
+Plans:
+- [ ] 21-01: TBD (run /gsd:plan-phase 21 to break down)
+
 ## Progress
 
 **Execution Order:**
-Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 8.1 → 9 → 10 → 11 → 12 → 13 → 14 → 15
+Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 8.1 → 9 → 10 → 11 → 12 → 13 → 14 → 15 → 16 → 17 → 18 → 19 → 20 → 21
 
 | Phase | Milestone | Plans Complete | Status | Completed |
 |-------|-----------|----------------|--------|-----------|
@@ -267,6 +334,12 @@ Phases execute in numeric order: 1 → 1.1 → 2 → 3 → 4 → 5 → 6 → 7
 | 13. Real Claude E2E Tests | v1.2 | 1/1 | Complete | 2026-02-02 |
 | 14. Parallel Phase Execution | v1.3 | 8/8 | Complete | 2026-02-02 |
 | 15. Frontend Wireframes | v1.3 | 3/3 | Complete | 2026-02-02 |
+| 16. Frontend Scaffold | v2.0 | 0/? | Not started | - |
+| 17. Initiative Dashboard | v2.0 | 0/? | Not started | - |
+| 18. Initiative Detail | v2.0 | 0/? | Not started | - |
+| 19. Agent Inbox | v2.0 | 0/? | Not started | - |
+| 20. Real-time Subscriptions | v2.0 | 0/? | Not started | - |
+| 21. Polish & Integration | v2.0 | 0/? | Not started | - |
 
 ---
 *Roadmap created: 2026-01-30*

.planning/STATE.md

@@ -5,16 +5,16 @@
 See: .planning/PROJECT.md (updated 2026-02-04)
 
 **Core value:** Coordinate multiple Claude Code agents without losing track or stepping on each other.
-**Current focus:** Planning next milestone
+**Current focus:** v2.0 Frontend — Build web UI from wireframes
 
 ## Current Position
 
-Phase: All milestones complete (v1.0-v1.3)
-Plan: None active
-Status: Ready for next milestone
-Last activity: 2026-02-04 — v1.3 milestone archived
+Phase: 16 of 21 (Frontend Scaffold)
+Plan: Not started
+Status: Ready to plan
+Last activity: 2026-02-04 - Milestone v2.0 Frontend created
 
-Progress: ██████████ 100% (61 plans across 15 phases)
+Progress: ░░░░░░░░░░ 0%
 
 ## Performance Metrics
 
@@ -191,6 +191,7 @@ None yet.
 - 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)
+- Milestone v2.0 created: Frontend, 6 phases (Phase 16-21)
 
 ### Blockers/Concerns
 
@@ -199,5 +200,5 @@ None.
 ## Session Continuity
 
 Last session: 2026-02-04
-Stopped at: v1.3 archived, ready for next milestone
+Stopped at: Milestone v2.0 Frontend initialization
 Resume file: None