SKILL.md
540 lines · 2,123 words
Accessibility Auditor
Purpose
Guide comprehensive accessibility implementation and auditing for web applications. This skill covers WCAG 2.2 conformance at all levels, practical ARIA patterns, testing methodology, and building accessibility into the development lifecycle.
WCAG 2.2 Conformance Levels
Level A (Minimum):
- All non-text content has text alternatives
- Captions for prerecorded audio
- Content is meaningful without color alone
- Keyboard accessible (no keyboard traps)
- No content that flashes more than 3 times/second
- Pages have descriptive titles
- Focus order is logical
- Link purpose is determinable
Level AA (Standard -- target for most projects):
- Everything in A, plus:
- Captions for live audio
- Color contrast 4.5:1 (text), 3:1 (large text)
- Text resizable to 200% without loss
- Images of text avoided (use real text)
- Multiple ways to find pages (nav, search, sitemap)
- Headings and labels are descriptive
- Focus visible
- Consistent navigation and identification
- Error suggestion and prevention on forms
Level AAA (Enhanced):
- Everything in AA, plus:
- Sign language for prerecorded audio
- Color contrast 7:1 (text), 4.5:1 (large text)
- No timing limits
- No interruptions (user controls all)
- Re-authentication without data loss