a11y-audit

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SKILL.md (first lines)

# Accessibility Audit

WCAG 2.2 Accessibility Audit and Remediation Skill

## Description

The a11y-audit skill provides a complete accessibility audit pipeline for modern web applications. It implements a three-phase workflow -- Scan, Fix, Verify -- that identifies WCAG 2.2 Level A and AA violations, generates exact fix code per framework, and produces stakeholder-ready compliance reports.

For every violation it finds, it provides the precise before/after code fix tailored to your framework (React, Next.js, Vue, Angular, Svelte, or plain HTML).

**What this skill does:**

1. **Scans** your codebase for every WCAG 2.2 Level A and AA violation, categorized by severity (Critical, Major, Minor)
2. **Fixes** each violation with framework-specific before/after code patterns
3. **Verifies** that fixes resolve the original violations and introduces no regressions
4. **Reports** findings in a structured format suitable for developers, PMs, and compliance stakeholders
5. **Integrates** into CI/CD pipelines to prevent accessibility regressions

## Features

| Feature | Description |
|---------|-------------|
| **Full WCAG 2.2 Scan** | Checks all Level A and AA success criteria across your codebase |
| **Framework Detection** | Auto-detects React, Next.js, Vue, Angular, Svelte, or plain HTML |
| **Severity Classification** | Categorizes each violation as Critical, Major, or Minor |
| **Fix Code Generation** | Produces before/after code diffs for every issue |
| **Color Contrast Checker** | Validates foreground/background pairs against AA and AAA ratios |
| **Compliance Reporting** | Generates stakeholder reports with pass/fail summaries |
| **CI/CD Integration** | GitHub Actions, GitLab CI, Azure DevOps pipeline configs |
| **Keyboard Navigation Audit** | Detects missing focus management and tab order issues |
| **ARIA Validation** | Checks for incorrect, redundant, or missing ARIA attributes |

### Severity Definitions

| Severity | Definition | Example | SLA |
|----------|-----------|---------|-----|
| **Critical** | Blocks access for entire user groups | Missing alt text, no keyboard access to navigation | Fix before release |
| **Major** | Significant barrier that degrades experience | Insufficient color contrast, missing form labels | Fix within current sprint |
| **Minor** | Usability issue that causes friction | Redundant ARIA roles, suboptimal heading hierarchy | Fix within next 2 sprints |

## Usage

### Quick Start

```bash
# Scan entire project
python scripts/a11y_scanner.py /path/to/project

# Scan with JSON output for tooling
python scripts/a11y_scanner.py /path/to/project --json

# Check color contrast for specific values
python scripts/contrast_checker.py --fg "#777777" --bg "#ffffff"

# Check contrast across a CSS/Tailwind file
python scripts/contrast_checker.py --file /path/to/styles.css
```

### Slash Command

```
/a11y-audit                    # Audit current project
/a11y-audit --scope src/       # Audit specific directory
/a11y-audit --fix              # Audit and auto-apply fixes
/a11y-audit --report           # Generate stakeholder report
/a11y-audit --ci               # Output CI-compatible results
```

### Three-Phase Workflow

**Phase 1: Scan** -- Walk the source tree, detect framework, apply rule set.

```bash
python scripts/a11y_scanner.py /path/to/project --format table
```

**Phase 2: Fix** -- Apply framework-specific fixes for each violation.

> See [references/framework-a11y-patterns.md](references/framework-a11y-patterns.md) for the complete fix patterns catalog.

**Phase 3: Verify** -- Re-run the scanner to confirm fixes and check for regressions.

```bash
python scripts/a11y_scanner.py /path/to/project --baseline audit-baseline.json
```

## Example: React Component Audit

```tsx
// BEFORE: src/components/ProductCard.tsx
function ProductCard({ product }) {
  return (
    <div onClick={() => navigate(`/product/${product.id}`)}>
      <img src={product.image} />
      <div style={{ color: '#aaa', fontSize: '12px' }}>{product.name}</div>
      <span style={{ color: '#999' }}>${product.price}</span>
    </div>
  );
}
```

| # | WCAG | Severity | Issue |
|---|------|----------|-------|
| 1 | 1.1.1 | Critical | `<img>` missing `alt` attribute |
| 2 | 2.1.1 | Critical | `<div onClick>` not keyboard accessible |
| 3 | 1.4.3 | Major | Color `#aaa` on white fails contrast (2.32:1, needs 4.5:1) |
| 4 | 1.4.3 | Major | Color `#999` on white fails contrast (2.85:1, needs 4.5:1) |
| 5 | 4.1.2 | Major | Interactive element missing role and accessible name |

```tsx
// AFTER: src/components/ProductCard.tsx
function ProductCard({ product }) {
  return (
    <a href={`/product/${product.id}`} className="product-card"
       aria-label={`View ${product.name} - $${product.price}`}>
      <img src={product.image} alt={product.imageAlt || product.name} />
      <div style={{ color: '#595959', fontSize: '12px' }}>{product.name}</div>
      <span style={{ color: '#767676' }}>${product.price}</span>
    </a>

From agisota/old-one, MIT.

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