Alexander Whitestone
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837c62945e
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feat: Visual Accessibility Audit of Foundation Web #492
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Replaces 12-line stub with full WCAG 2.1 AA compliance auditor.
Programmatic checks + optional Gemma 3 vision model analysis.
WCAG checks implemented:
- 1.1.1 Non-text Content (alt text on images)
- 1.3.1 Info and Relationships (heading hierarchy, landmarks)
- 1.4.3 Contrast (Minimum) — color contrast ratio calculation
- 2.4.1 Bypass Blocks (skip navigation link)
- 2.4.2 Page Titled (meaningful <title>)
- 2.4.4 Link Purpose (descriptive link text)
- 3.1.1 Language of Page (lang attribute)
- 4.1.2 Name, Role, Value (form labels, ARIA)
Features:
- Full HTML parser extracting images, headings, links, forms, landmarks
- WCAG contrast ratio calculation (relative luminance, sRGB)
- Vision model analysis (Gemma 3) for visual contrast/layout issues
- Multi-page site audit with per-page scoring
- JSON + human-readable text reports
- CLI with --url, --pages, --vision, --format flags
- Severity classification: critical/major/minor
Tests: 29/29 passing.
Closes #492
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2026-04-13 20:51:22 -04:00 |
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