Frontend Debug Team

Dual-mode frontend debugging: feature-list testing or bug-report debugging, powered by Chrome DevTools MCP.

Architecture

Skill(skill="team-frontend-debug", args="feature list or bug description")
                    |
         SKILL.md (this file) = Router
                    |
     +--------------+--------------+
     |                             |
  no --role flag              --role <name>
     |                             |
  Coordinator                  Worker
  roles/coordinator/role.md    roles/<name>/role.md
     |
     +-- analyze input → select pipeline → dispatch → spawn → STOP
                                    |
         ┌──────────────────────────┼──────────────────────┐
         v                         v                       v
    [test-pipeline]          [debug-pipeline]          [shared]
     tester(DevTools)        reproducer(DevTools)      analyzer
                                                       fixer
                                                       verifier

Pipeline Modes

| Input | Pipeline | Flow | |-------|----------|------| | Feature list / 功能清单 | test-pipeline | TEST → ANALYZE → FIX → VERIFY | | Bug report / 错误描述 | debug-pipeline | REPRODUCE → ANALYZE → FIX → VERIFY |

Role Registry

| Role | Path | Prefix | Inner Loop | |------|------|--------|------------| | coordinator | roles/coordinator/role.md | — | — | | tester | roles/tester/role.md | TEST- | true | | reproducer | [roles/reproducer/role.md](roles/reproducer/role.md) | REPRODUCE- | false | | analyzer | roles/analyzer/role.md | ANALYZE- | false | | fixer | [roles/fixer/role.md](roles/fixer/role.md) | FIX- | true | | verifier | roles/verifier/role.md | VERIFY- | false |

Role Router

Parse $ARGUMENTS:

• Has --role <name> → Read roles/<name>/role.md, execute Phase 2-4
• No --role → @roles/coordinator/role.md, execute entry router

Shared Constants

• Session prefix: TFD
• Session path: .workflow/.team/TFD-<slug>-<date>/
• CLI tools: ccw cli --mode analysis (read-only), ccw cli --mode write (modifications)
• Message bus: mcp__ccw-tools__team_msg(session_id=<session-id>, ...)

Workspace Resolution

Coordinator MUST resolve paths at Phase 2 before TeamCreate:

1. Run Bash({ command: "pwd" }) → capture project_root (absolute path)
2. skill_root = <project_root>/.claude/skills/team-frontend-debug
3. Store in team-session.json:

json { "project_root": "/abs/path/to/project", "skill_root": "/abs/path/to/skill" }

1. All worker role_spec values MUST use <skill_root>/roles/<role>/role.md (absolute)

This ensures workers spawned with run_in_background: true always receive an absolute, resolvable path regardless of their working directory.

Chrome DevTools MCP Tools

All browser inspection operations use Chrome DevTools MCP. Reproducer and Verifier are primary consumers.

| Tool | Purpose | |------|---------| | mcp__chrome-devtools__navigate_page | Navigate to target URL | | mcp__chrome-devtools__take_screenshot | Capture visual state | | mcp__chrome-devtools__take_snapshot | Capture DOM/a11y tree | | mcp__chrome-devtools__list_console_messages | Read console logs | | mcp__chrome-devtools__get_console_message | Get specific console message | | mcp__chrome-devtools__list_network_requests | Monitor network activity | | mcp__chrome-devtools__get_network_request | Inspect request/response detail | | mcp__chrome-devtools__performance_start_trace | Start performance recording | | mcp__chrome-devtools__performance_stop_trace | Stop and analyze trace | | mcp__chrome-devtools__click | Simulate user click | | mcp__chrome-devtools__fill | Fill form inputs | | mcp__chrome-devtools__hover | Hover over elements | | mcp__chrome-devtools__evaluate_script | Execute JavaScript in page | | mcp__chrome-devtools__wait_for | Wait for element/text | | mcp__chrome-devtools__list_pages | List open browser tabs | | mcp__chrome-devtools__select_page | Switch active tab |

Worker Spawn Template

Coordinator spawns workers using this template:

Agent({
  subagent_type: "team-worker",
  description: "Spawn <role> worker",
  team_name: <team-name>,
  name: "<role>",
  run_in_background: true,
  prompt: `## Role Assignment
role: <role>
role_spec: <skill_root>/roles/<role>/role.md
session: <session-folder>
session_id: <session-id>
team_name: <team-name>
requirement: <task-description>
inner_loop: <true|false>

## Progress Milestones
session_id: <session-id>
Report progress via team_msg at natural phase boundaries (context loaded -> core work done -> verification).
Report blockers immediately via team_msg type="blocker".
Report completion via team_msg type="task_complete" after final SendMessage.

Read role_spec file (@<skill_root>/roles/<role>/role.md) to load Phase 2-4 domain instructions.
Execute built-in Phase 1 (task discovery) -> role Phase 2-4 -> built-in Phase 5 (report).`
})

User Commands

| Command | Action | |---------|--------| | check / status | View execution status graph | | resume / continue | Advance to next step | | revise <TASK-ID> [feedback] | Revise specific task | | feedback <text> | Inject feedback for revision | | retry <TASK-ID> | Re-run a failed task |

Completion Action

When pipeline completes, coordinator presents:

AskUserQuestion({
  questions: [{
    question: "Pipeline complete. What would you like to do?",
    header: "Completion",
    multiSelect: false,
    options: [
      { label: "Archive & Clean (Recommended)", description: "Archive session, clean up team" },
      { label: "Keep Active", description: "Keep session for follow-up debugging" },
      { label: "Export Results", description: "Export debug report and patches" }
    ]
  }]
})

Specs Reference

• specs/pipelines.md — Pipeline definitions and task registry
• specs/debug-tools.md — Chrome DevTools MCP usage patterns and evidence collection

Session Directory

.workflow/.team/TFD-<slug>-<date>/
├── team-session.json           # Session state + role registry
├── evidence/                   # Screenshots, snapshots, network logs
├── artifacts/                  # Test reports, RCA reports, patches, verification reports
├── wisdom/                     # Cross-task debug knowledge
└── .msg/                       # Team message bus

Error Handling

| Scenario | Resolution | |----------|------------| | All features pass test | Report success, pipeline completes without ANALYZE/FIX/VERIFY | | Bug not reproducible | Reproducer reports failure, coordinator asks user for more details | | Browser not available | Report error, suggest manual reproduction steps | | Analysis inconclusive | Analyzer requests more evidence via iteration loop | | Fix introduces regression | Verifier reports fail, coordinator dispatches re-fix | | No issues found in test | Skip downstream tasks, report all-pass | | Unknown command | Error with available command list | | Role not found | Error with role registry |