# wcag-accessibility-audit

Checks websites and web apps against WCAG 2.1 and 2.2, exposing accessibility barriers and reviewing A, AA, or AAA conformance.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 1600 installs · ★ 58
- Author: mastepanoski
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/mastepanoski/claude-skills/tree/HEAD/skills/wcag-accessibility-audit/SKILL.md
- Updated: 2026-10-10
- HTML: https://affpapa.org/en/nevibecode/skills/wcag-accessibility-audit

## What it does

This skill guides an accessibility review around the four WCAG principles: perceivable content, operable controls, understandable interaction, and compatibility with user agents. It covers conformance levels A, AA, and AAA, with attention to navigation, forms, media, dynamic content, and key user flows.

The audit needs an `interface_description`. Live URLs or screenshots are recommended, and you can add the target level, WCAG version, known complaints, and assistive technologies used for testing. The workflow includes checks with `axe DevTools`, `WAVE`, `Lighthouse`, an HTML validator, and a contrast analyzer, followed by keyboard and screen-reader testing.

Automated checks catch about 30-40% of accessibility issues, so manual testing remains necessary. A scan from `Lighthouse` or `axe DevTools` alone does not cover the audit.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add mastepanoski/claude-skills --skill wcag-accessibility-audit -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/wcag-accessibility-audit/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/wcag-accessibility-audit/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add mastepanoski/claude-skills --skill wcag-accessibility-audit -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/wcag-accessibility-audit/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add mastepanoski/claude-skills --skill wcag-accessibility-audit -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/wcag-accessibility-audit/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install mastepanoski/claude-skills wcag-accessibility-audit
```

2. **Manually: put the files in place**
- File: `.github/skills/wcag-accessibility-audit/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add mastepanoski/claude-skills --skill wcag-accessibility-audit -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/mastepanoski/claude-skills --path skills/wcag-accessibility-audit
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/wcag-accessibility-audit/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add mastepanoski/claude-skills --skill wcag-accessibility-audit -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/mastepanoski/claude-skills/tree/HEAD/skills/wcag-accessibility-audit/SKILL.md

## When to use it
- spot accessibility barriers across key pages
- test navigation with the keyboard alone
- check focus order, dialogs, and form controls
- map findings to WCAG success criteria
- review a product before launch

## Example prompts
- Audit this web app against WCAG 2.2 at level AA. Here is the interface description: `interface_description`.
- Review these URLs for keyboard navigation, focus visibility, forms, and modal dialogs.
- Create a WCAG 2.1 accessibility report using the known user complaints and the screen reader setup.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 2e07ae63fbf329a0.

BEGIN THIRD-PARTY FILE 2e07ae63fbf329a0
```text
---
name: wcag-accessibility-audit
description: Comprehensive web accessibility audit using WCAG 2.1/2.2 guidelines. Evaluate compliance across 4 POUR principles (Perceivable, Operable, Understandable, Robust) with A, AA, AAA conformance levels.
---

# WCAG Accessibility Audit

This skill enables AI agents to perform a comprehensive **web accessibility evaluation** using the **Web Content Accessibility Guidelines (WCAG) 2.1 and 2.2** standards, ensuring digital products are usable by people with disabilities.

WCAG is the international standard for web accessibility. WCAG 2.2 is a W3C Recommendation and was approved as ISO/IEC 40500:2025; WCAG 3 is still a working draft and should not be used as a conformance target.

Use this skill to identify accessibility barriers, ensure legal compliance, reach broader audiences, and build inclusive digital experiences.

Combine with "Nielsen Heuristics Audit" for comprehensive usability evaluation or "Don Norman Principles" for human-centered design assessment.

## When to Use This Skill

Invoke this skill when:
- Ensuring legal compliance with accessibility laws (ADA, Section 508, EAA)
- Auditing websites or apps for accessibility barriers
- Planning inclusive design improvements
- Preparing for accessibility certifications
- Evaluating vendor products for procurement
- Training teams on accessibility standards
- Conducting pre-launch accessibility reviews

## Inputs Required

When executing this audit, gather:

- **interface_description**: Detailed description (type: website/web app/mobile app, purpose, target users, key features) [REQUIRED]
- **urls_or_screenshots**: Live URLs (preferred) or screenshots of key pages/screens [OPTIONAL but highly recommended]
- **target_conformance_level**: A, AA (most common), or AAA [OPTIONAL, defaults to AA]
- **specific_concerns**: Known accessibility issues or user complaints [OPTIONAL]
- **assistive_technologies_used**: Screen readers, keyboard-only, voice control, etc. [OPTIONAL]
- **wcag_version**: 2.1 or 2.2 (defaults to 2.2, latest Recommendation) [OPTIONAL]

## The 4 POUR Principles

WCAG is organized around 4 core principles:

### 1. **Perceivable**
Information and user interface components must be presentable to users in ways they can perceive.

**Guidelines:**
- 1.1 Text Alternatives
- 1.2 Time-based Media
- 1.3 Adaptable
- 1.4 Distinguishable

### 2. **Operable**
User interface components and navigation must be operable.

**Guidelines:**
- 2.1 Keyboard Accessible
- 2.2 Enough Time
- 2.3 Seizures and Physical Reactions
- 2.4 Navigable
- 2.5 Input Modalities

### 3. **Understandable**
```
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