Add subagents for discussion, document generation, and code exploration

- Introduced Discuss Subagent for lightweight multi-perspective critique, reducing overhead from ~60-90s to ~5s.
- Added Doc Generation Subagent for generating documents with CLI analysis and template filling.
- Implemented Explore Subagent for centralized codebase exploration with caching, replacing the standalone explorer role.
- Created templates for architecture documents, epics, product briefs, and requirements PRD to standardize outputs.
- Added a review file for tracking changes and discussions.

.claude/skills/team-lifecycle/role-specs/fe-developer.md

@@ -0,0 +1,79 @@
+---
+role: fe-developer
+prefix: DEV-FE
+inner_loop: false
+discuss_rounds: []
+subagents: []
+message_types:
+  success: dev_fe_complete
+  progress: dev_fe_progress
+  error: error
+---
+
+# FE Developer — Phase 2-4
+
+## Phase 2: Context Loading
+
+**Inputs to load**:
+- Plan: `<session-folder>/plan/plan.json`
+- Design tokens: `<session-folder>/architecture/design-tokens.json` (optional)
+- Design intelligence: `<session-folder>/analysis/design-intelligence.json` (optional)
+- Component specs: `<session-folder>/architecture/component-specs/*.md` (optional)
+- Shared memory, wisdom
+
+**Tech stack detection**:
+
+| Signal | Framework | Styling |
+|--------|-----------|---------|
+| react/react-dom in deps | react | - |
+| vue in deps | vue | - |
+| next in deps | nextjs | - |
+| tailwindcss in deps | - | tailwind |
+| @shadcn/ui in deps | - | shadcn |
+
+## Phase 3: Frontend Implementation
+
+**Step 1**: Generate design token CSS (if tokens available)
+- Convert design-tokens.json → CSS custom properties (`:root { --color-*, --space-*, --text-* }`)
+- Include dark mode overrides via `@media (prefers-color-scheme: dark)`
+- Write to `src/styles/tokens.css`
+
+**Step 2**: Implement components
+
+| Task Size | Strategy |
+|-----------|----------|
+| Simple (<= 3 files, single component) | `Task({ subagent_type: "code-developer", run_in_background: false })` |
+| Complex (system, multi-component) | `ccw cli --tool gemini --mode write` (background) |
+
+**Coding standards** (include in agent/CLI prompt):
+- Use design token CSS variables, never hardcode colors/spacing
+- Interactive elements: cursor: pointer
+- Transitions: 150-300ms
+- Text contrast: minimum 4.5:1
+- Include focus-visible styles
+- Support prefers-reduced-motion
+- Responsive: mobile-first
+- No emoji as functional icons
+
+## Phase 4: Self-Validation
+
+| Check | What |
+|-------|------|
+| hardcoded-color | No #hex outside tokens.css |
+| cursor-pointer | Interactive elements have cursor: pointer |
+| focus-styles | Interactive elements have focus styles |
+| responsive | Has responsive breakpoints |
+| reduced-motion | Animations respect prefers-reduced-motion |
+| emoji-icon | No emoji as functional icons |
+
+Contribute to wisdom/conventions.md. Update shared-memory.json with component inventory.
+
+**Report**: file count, framework, design token usage, self-validation results.
+
+## Error Handling
+
+| Scenario | Resolution |
+|----------|------------|
+| Design tokens not found | Use project defaults |
+| Tech stack undetected | Default HTML + CSS |
+| Subagent failure | Fallback to CLI write mode |