feat: add ui_design_specialist (Phase 3 UI Design) v0.2.0

- New specialist: ui_design_specialist with iterative mockup dialog
- New Phase 3 (UI Design) between Architecture and Implementation
- Relay model: orchestrator passes responses verbatim in Phase 3
- Cost-control exception for UI Design phase (unlimited subagent calls)
- Webspace mockup workflow with cache-buster and obscure dirs
- UX states coverage (loading, empty, error, partial)
- WCAG 2.1 AA accessibility guidelines
- Design tokens (CSS custom properties) in design system
- Component states (hover, focus, active, disabled, loading, error)
- Sitemap/wireframe before mockups for complex UIs
- Real content strategy (no Lorem Ipsum)
- Form validation UX in mockups
- Dark mode and i18n support (optional)
- Design handoff support (specialist available during implementation)
- Skip mechanism for non-UI projects
- Mockup state file for context compression recovery
- Multi-page mockup strategy with index.html
- task_graph.json mockup references
- Plugin version: 0.1.14 -> 0.2.0
- 47 files changed across 7 implementation blocks
- 3 review rounds with 41 corrections integrated

default_config.yaml

@@ -51,6 +51,9 @@ cost_control:
   raw_logs_to_files: false
   release_auditor_every_n_blocks: 3
   summarize_long_outputs: true
+  # UI Design phase exception: iterative dialog needs unlimited subagent calls
+  ui_design_phase_exception: true
+  ui_design_phase_max_calls: 0  # 0 = unlimited
 external_tools:
   browser:
     enabled: true
@@ -123,6 +126,9 @@ model_routing:
     test_debug_engineer:
       preset: balanced-coding
       purpose: Tests, logs, debugging, root cause
+    ui_design_specialist:
+      preset: strong-reasoning
+      purpose: UI design planning, mockup creation, iterative user dialog, technology alignment, UX states, accessibility
 orchestrator:
   hide_subagent_details_from_user: true
   mode: core