Accessibility Agents

WCAG 2.2 AA enforcement for agentic coding, as a set of Agent Skills. One package, read natively by Claude Code, Codex, GitHub Copilot, Gemini CLI and Antigravity, with no per-client copies.

Models forget accessibility while generating code. This package makes that harder: it routes the work to the right specialist, blocks edits to user-facing files until the accessibility lead has reviewed, and renders audit reports from structured findings rather than from memory.

Install

npm install
node scripts/install.mjs

That copies the skills to ~/.agents/skills, the shared location Codex, Copilot, Gemini and Antigravity read, and writes the hook manifest for whichever clients are present. It never overwrites a hooks file or a skill you have edited. Add --dry-run to see what it would do.

As a plugin, which wires the hooks for you:

Claude Code   /plugin marketplace add Community-Access/accessibility-agents
Copilot       copilot plugin install accessibility-agents
Codex         /plugins, then add this repository

How to use it

Describe the problem. Six entry points route the rest.

You are working on	Skill
HTML, JSX, TSX, Vue, Svelte, CSS, or a server template	accessibility-lead
A full site or app audit rather than one change	web-accessibility-wizard
Word, Excel, PowerPoint, PDF or ePub files	document-accessibility-wizard
Markdown documentation	markdown-a11y-assistant
Python, wxPython, desktop apps, NVDA add-ons, accessibility tooling	developer-hub
Issues, pull requests, releases, projects, actions, security, teams, wikis	github-hub

Those six dispatch a further 102 specialist, helper and reference skills by name. The other 102 are invisible to the model until a router names one, which is why the whole package costs about 1,100 tokens before you have said anything.

What it does

• Reviews web UI across ARIA, keyboard, focus, forms, contrast, modals, live regions, headings, tables, links, cognitive load, internationalisation, performance, mobile, email, data visualisation and web components.
• Scans documents for Office, PDF and ePub accessibility, one file or a whole tree, and generates remediation scripts.
• Audits markdown for link text, alt text, heading order, tables, emoji and diagrams.
• Blocks unreviewed edits. A hook refuses a write to a user-facing file until the accessibility lead completes, on every client that supports hooks.
• Renders reports. Findings are JSON; a script writes the report, computes the score, and shows the delta against the previous run.
• Supplies scanners over MCP. Thirty-nine tools: axe-core, Office, PDF, ePub, markdown, veraPDF, Playwright behavioural scans, audit history and report rendering.

Layout

AGENTS.md                the always-on contract, under 1,200 tokens
CLAUDE.md                one line, importing AGENTS.md
plugin.json              Agent Plugins 1.0 manifest
mcp.json                 MCP server registration
skills/                  108 skills
  a11y-core/             shared contract, findings schema, scripts
  <router>/              the six entry points
  <specialist>/          one domain each, dispatched by a router
  kb-<domain>/           reference data: rule tables, URL registries, formulas
hooks/                   one guard script, four client manifests
mcp-server/              the scanners
docs/                    conformance dossier, guides, release notes

Verify

npm run verify

Fifteen gates, each naming the standard it checks and what a failure would cost, including live sessions on Claude Code, Codex and Copilot. The evidence, measured results and the one documented deviation from the Agent Skills specification are in the conformance dossier.

npm run measure           # what the package costs, per client
npm run measure:dispatch  # what dispatching a specialist costs
npm run probe:mcp         # the MCP tool surface

Standards

Each standard, with what it governs.

Standard	Governs
Agent Skills	every skill
AGENTS.md	the always-on contract
Agent Plugins 1.0	packaging
Model Context Protocol	the scanners
WCAG 2.2	every criterion a finding cites

Contributing

Edit skills/<name>/SKILL.md, keep the body under 6 KiB, put the long tail in references/, and run npm run verify. Details in CONTRIBUTING.md.

History

Version 7.0 replaced six hand-maintained per-client trees with this one package. The plan, the phases and the measured impact are in the modernization record. What comes next is in ROADMAP.md.

Licence

MIT. See LICENSE.