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 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:

spawn_agent

wait_agent

close_agent

send_message

followup_task

list_agents

request_user_input

mcp__ccw-tools__team_msg

Read/Write

.workflow/.team/

Read

roles/

commands/

specs/

Read/Grep/Glob

Edit

.workflow/

Bash("ccw cli ...")

Bash

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:

// 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 })

result.timed_out

close_agent({ target })

Model Selection Guide

Visual accessibility is a precision pipeline where auditors need thorough analysis and fix-implementer needs careful code changes.

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

check

status

resume

continue

Specs Reference

• specs/pipelines.md -- Pipeline definitions and task registry
• specs/oklch-standards.md -- OKLCH color accessibility rules
• specs/wcag-matrix.md -- WCAG 2.1 criteria matrix
• specs/typography-scale.md -- Typography accessibility rules
• 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

send_message

followup_task

list_agents

Agent Health Check

Use

list_agents({})

// 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>"

• 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