team-visual-a11y

# Team Visual Accessibility Deep visual accessibility QA: OKLCH-based perceptual color contrast, typography readability at all viewports, focus-visible completeness, WCAG AA/AAA audit at rendered level. Built on **team-worker agent architecture** -- all worker roles share a single agent definition with role-specific Phase 2-4 loaded from `roles/<role>/role.md`. ## Architecture ``` Skill(skill="team-visual-a11y", args="task description") | SKILL.md (this file) = Router | +--------------+--------------+ | | no --role flag --role <name> | | Coordinator Worker roles/coordinator/role.md roles/<name>/role.md | +-- analyze -> dispatch -> spawn workers -> STOP | +-------+-------+-------+ v v v | [3 auditors spawn in PARALLEL] | color-auditor typo-auditor focus-auditor | | | +---+---+---+---+ v remediation-planner | v fix-implementer (inner_loop) | v [re-audit: color + focus in PARALLEL] ``` ## Role Registry | Role | Path | Prefix | Inner Loop | |------|------|--------|------------| | coordinator | [roles/coordinator/role.md](roles/coordinator/role.md) | -- | -- | | color-auditor | [roles/color-auditor/role.md](roles/color-auditor/role.md) | COLOR-* | false | | typo-auditor | [roles/typo-auditor/role.md](roles/typo-auditor/role.md) | TYPO-* | false | | focus-auditor | [roles/focus-auditor/role.md](roles/focus-auditor/role.md) | FOCUS-* | false | | remediation-planner | [roles/remediation-planner/role.md](roles/remediation-planner/role.md) | REMED-* | false | | fix-implementer | [roles/fix-implementer/role.md](roles/fix-implementer/role.md) | FIX-* | true | ## 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 ## Delegation Lock **Coordinator is a PURE ORCHESTRATOR. It coordinates, it does NOT do.** Before calling ANY tool, apply this check: | Tool Call | Verdict | Reason | |-----------|---------|--------| | `spawn_agent`, `wait_agent`, `close_agent`, `send_message`, `followup_task` | ALLOWED | Orchestration | | `list_agents` | ALLOWED | Agent health check | | `request_user_input` | ALLOWED | User interaction | | `mcp__ccw-tools__team_msg` | ALLOWED | Message bus | | `Read/Write` on `.workflow/.team/` files | ALLOWED | Session state | | `Read` on `roles/`, `commands/`, `specs/` | ALLOWED | Loading own instructions | | `Read/Grep/Glob` on project source code | BLOCKED | Delegate to worker | | `Edit` on any file outside `.workflow/` | BLOCKED | Delegate to worker | | `Bash("ccw cli ...")` | BLOCKED | Only workers call CLI | | `Bash` running build/test/lint commands | BLOCKED | Delegate to worker | **If a tool call is BLOCKED**: STOP. Create a task, spawn a worker. **No exceptions for "simple" tasks.** Even a single-file read-and-report MUST go through spawn_agent. --- ## Shared Constants - **Session prefix**: `VA` - **Session path**: `.workflow/.team/VA-<date>-<slug>/` - **team_name**: `visual-a11y` - **CLI tools**: `ccw cli --mode analysis` (read-only), `ccw cli --mode write` (modifications) - **Message bus**: `mcp__ccw-tools__team_msg(session_id=<session-id>, ...)` - **Max GC rounds**: 2 ## Worker Spawn Template Coordinator spawns workers using this template: ``` spawn_agent({ agent_type: "team_worker", task_name: "<task-id>", fork_turns: "none", message: `## Role Assignment role: <role> role_spec: <skill_root>/roles/<role>/role.md session: <session-folder> session_id: <session-id> requirement: <task-description> inner_loop: <true|false> Read role_spec file (<skill_root>/roles/<role>/role.md) to load Phase 2-4 domain instructions. ## Task Context task_id: <task-id> title: <task-title> description: <task-description> pipeline_phase: <pipeline-phase> ## Upstream Context <prev_context>` }) ``` ### Parallel Fan-in Spawn (3 Auditors) The 3 auditors run in parallel. Spawn all 3, then wait for all 3: ```javascript // Spawn 3 auditors in parallel spawn_agent({ agent_type: "team_worker", task_name: "COLOR-001", fork_turns: "none", message: `## Role Assignment role: color-auditor role_spec: ${skillRoot}/roles/color-auditor/role.md session: ${sessionFolder} session_id: ${sessionId} requirement: ${colorTaskDescription} inner_loop: false Read role_spec file to load Phase 2-4 domain instructions. ## Task Context task_id: COLOR-001 title: OKLCH Color Contrast Audit description: ${colorTaskDescription} pipeline_phase: audit` }) spawn_agent({ agent_type: "team_worker", task_name: "TYPO-001", fork_turns: "none", message: `## Role Assignment role: typo-auditor role_spec: ${skillRoot}/roles/typo-auditor/role.md session: ${sessionFolder} session_id: ${sessionId} requirement: ${typoTaskDescription} inner_loop: false Read role_spec file to load Phase 2-4 domain instructions. ## Task Context task_id: TYPO-001 title: Typography Readability Audit description: ${typoTaskDescription} pipeline_phase: audit` }) spawn_agent({ agent_type: "team_worker", task_name: "FOCUS-001", fork_turns: "none", message: `## Role Assignment role: focus-auditor role_spec: ${skillRoot}/roles/focus-auditor/role.md session: ${sessionFolder} session_id: ${sessionId} requirement: ${focusTaskDescription} inner_loop: false Read role_spec file to load Phase 2-4 domain instructions. ## Task Context task_id: FOCUS-001 title: Focus & Keyboard Accessibility Audit description: ${focusTaskDescription} pipeline_phase: audit` }) // Wait for ALL 3 auditors to complete wait_agent({ timeout_ms: 1800000 }) // 30 min — apply timeout cascade if timed_out // Close all 3 close_agent({ target: "COLOR-001" }) close_agent({ target: "TYPO-001" }) close_agent({ target: "FOCUS-001" }) // Then spawn remediation-planner with all 3 audit results as upstream context ``` After spawning, use `wait_agent({ timeout_ms: 1800000 })` to collect results. If `result.timed_out`, send STATUS_CHECK via followup_task (wait 3 min), then FINALIZE with interrupt (wait 3 min), then mark timed_out and close agents. Use `close_agent({ target })` each worker. ### Model Selection Guide Visual accessibility is a precision pipeline where auditors need thorough analysis and fix-implementer needs careful code changes. | Role | reasoning_effort | Rationale | |------|-------------------|-----------| | color-auditor | high | OKLCH calculations, contrast ratio precision | | typo-auditor | high | Multi-breakpoint analysis, clamp() validation | | focus-auditor | high | ARIA patterns, keyboard navigation completeness | | remediation-planner | high | Synthesize 3 audit reports into actionable plan | | fix-implementer | medium | Implementation follows defined remediation plan | ### Audit-to-Remediation Context Flow All 3 audit findings must reach remediation-planner via coordinator's upstream context: ``` // After COLOR-001 + TYPO-001 + FOCUS-001 all complete, coordinator sends findings to planner spawn_agent({ agent_type: "team_worker", task_name: "REMED-001", fork_turns: "none", message: `## Upstream Context Color audit: <session>/audits/color/color-audit-001.md Typography audit: <session>/audits/typography/typo-audit-001.md Focus audit: <session>/audits/focus/focus-audit-001.md` }) ``` ## User Commands | Command | Action | |---------|--------| | `check` / `status` | View execution status graph | | `resume` / `continue` | Advance to next step | ## Specs Reference - [specs/pipelines.md](specs/pipelines.md) -- Pipeline definitions and task registry - [specs/oklch-standards.md](specs/oklch-standards.md) -- OKLCH color accessibility rules - [specs/wcag-matrix.md](specs/wcag-matrix.md) -- WCAG 2.1 criteria matrix - [specs/typography-scale.md](specs/typography-scale.md) -- Typography accessibility rules - [specs/focus-patterns.md](specs/focus-patterns.md) -- Focus management patterns ## Session Directory ``` .workflow/.team/VA-<date>-<slug>/ +-- .msg/ | +-- messages.jsonl # Team message bus | +-- meta.json # Pipeline config + GC state +-- audits/ | +-- color/ # Color auditor output | | +-- color-audit-001.md | +-- typography/ # Typography auditor output | | +-- typo-audit-001.md | +-- focus/ # Focus auditor output | +-- focus-audit-001.md +-- remediation/ # Remediation planner output | +-- remediation-plan.md +-- fixes/ # Fix implementer output | +-- fix-summary-001.md +-- re-audit/ # Re-audit output (GC loop) | +-- color-audit-002.md | +-- focus-audit-002.md +-- evidence/ # Screenshots, traces ``` ## v4 Agent Coordination ### Message Semantics | Intent | API | Example | |--------|-----|---------| | Queue supplementary info (don't interrupt) | `send_message` | Send audit findings to running remediation-planner | | Assign new work from reviewed plan | `followup_task` | Assign FIX task after remediation plan ready | | Check running agents | `list_agents` | Verify agent health during resume | ### Agent Health Check Use `list_agents({})` in handleResume and handleComplete: ``` // Reconcile session state with actual running agents const running = list_agents({}) // Compare with tasks.json active tasks // Reset orphaned tasks (in_progress but agent gone) to pending ``` ### Named Agent Targeting Workers are spawned with `task_name: "<task-id>"` enabling direct addressing: - `send_message({ target: "REMED-001", message: "..." })` -- send additional audit findings to remediation-planner - `followup_task({ target: "FIX-001", message: "..." })` -- assign implementation from remediation plan - `close_agent({ target: "COLOR-001" })` -- cleanup after color audit ## Error Handling | Scenario | Resolution | |----------|------------| | Unknown command | Error with available command list | | Role not found | Error with role registry | | Session corruption | Attempt recovery, fallback to manual | | Fast-advance conflict | Coordinator reconciles on next callback | | Completion action fails | Default to Keep Active | | GC loop stuck > 2 rounds | Escalate to user: accept / retry / terminate | | Chrome DevTools unavailable | Degrade to static analysis only |