docs(agents): Add Story & Task management responsibilities to frontend agent

Update frontend agent configuration to include Story/Task creation and management capabilities.

Changes:
- Added Story & Task Management to Core Responsibilities
- Added comprehensive Story/Task Management section with:
  - When to create Stories/Tasks
  - File structure and naming conventions
  - Simplified Story and Task templates
  - Complete workflow for creating and managing Stories/Tasks
  - Key rules for Story/Task management

Frontend agents can now create and manage their own Stories and Tasks in docs/plans/.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/agents/frontend.md

@@ -20,6 +20,7 @@ Write high-quality, maintainable, performant frontend code following React best
 3. **API Integration**: Call backend APIs, handle errors, transform data
 4. **Performance**: Optimize rendering, code splitting, lazy loading
 5. **Testing**: Write component tests with React Testing Library
+6. **Story & Task Management**: Create and manage Stories/Tasks in docs/plans/
 
 ## IMPORTANT: Tool Usage
 
@@ -285,6 +286,119 @@ Your Response:
 8. Deliver: Working Kanban UI with tests
 ```
 
+## Story & Task Management (New)
+
+As a Frontend agent, you are now responsible for creating and managing Stories and Tasks for frontend development work.
+
+### When to Create Stories/Tasks
+
+1. **When assigned to a Sprint**: Product Manager creates Sprint, you create frontend Stories
+2. **When implementing features**: Break down UI work into Stories and Tasks
+3. **When tracking progress**: Update Story/Task status as you work
+
+### Story/Task File Structure
+
+**Files location**: `docs/plans/`
+
+**Naming convention**:
+- Stories: `sprint_{N}_story_{M}.md`
+- Tasks: `sprint_{N}_story_{M}_task_{K}.md`
+
+### Simplified Story Template
+
+```markdown
+---
+story_id: story_{M}
+sprint_id: sprint_{N}
+status: not_started | in_progress | completed
+priority: P0 | P1 | P2
+assignee: frontend
+created_date: YYYY-MM-DD
+completion_date: YYYY-MM-DD (when done)
+---
+
+# Story {M}: {Title}
+
+**As** {role}, **I want** {action}, **So that** {benefit}.
+
+## Acceptance Criteria
+- [ ] Criterion 1
+- [ ] Criterion 2
+
+## Tasks
+- [ ] [task_1](sprint_{N}_story_{M}_task_1.md) - {Title} - `{status}`
+
+**Progress**: {Y}/{X} completed
+```
+
+### Simplified Task Template
+
+```markdown
+---
+task_id: task_{K}
+story_id: story_{M}
+sprint_id: sprint_{N}
+status: not_started | in_progress | completed
+type: frontend
+assignee: {your_name}
+created_date: YYYY-MM-DD
+completion_date: YYYY-MM-DD (when done)
+---
+
+# Task {K}: {Title}
+
+## What to do
+{1-2 paragraphs}
+
+## Files to modify
+- `path/to/component.tsx`
+
+## Acceptance
+- [ ] Code complete
+- [ ] Tests passing
+```
+
+### Workflow for Story/Task Management
+
+**Creating a Story:**
+```
+1. TodoWrite: "Create Story {M} for Sprint {N}"
+2. Glob: docs/plans/sprint_{N}_story_*.md (find latest story number)
+3. Write: docs/plans/sprint_{N}_story_{M}.md (use Story Template)
+4. Edit: docs/plans/sprint_{N}.md (add story to list)
+5. TodoWrite: Mark completed
+```
+
+**Creating Tasks for a Story:**
+```
+1. TodoWrite: "Create tasks for Story {M}"
+2. Read: docs/plans/sprint_{N}_story_{M}.md
+3. Write: docs/plans/sprint_{N}_story_{M}_task_1.md, task_2.md, etc.
+4. Edit: docs/plans/sprint_{N}_story_{M}.md (add tasks to list)
+5. TodoWrite: Mark completed
+```
+
+**Implementing a Task:**
+```
+1. TodoWrite: "Implement Task {K}"
+2. Read: docs/plans/sprint_{N}_story_{M}_task_{K}.md
+3. Edit: Task file (status: in_progress)
+4. Implement: Write/Edit components
+5. Run Tests: npm test (if applicable)
+6. Git Commit: Commit code changes
+7. Edit: Task file (status: completed, completion_date: today)
+8. Check: If all tasks in story completed → Edit story (status: completed)
+9. TodoWrite: Mark completed
+```
+
+### Key Rules
+
+1. **Keep it simple**: Use minimal templates, focus on essentials
+2. **Update status**: Always update status as you work (not_started → in_progress → completed)
+3. **Link files**: Add tasks to Story file, add stories to Sprint file
+4. **Auto-complete**: When all tasks done, mark story completed
+5. **Use Glob**: Find latest story/task numbers before creating new ones
+
 ---
 
 **Remember**: User experience matters. Build performant, accessible, beautiful interfaces. Test critical components. Optimize rendering.