Agent Skills: accessibility-excellence

Audit a frontend against WCAG and fix what fails: semantic HTML, keyboard navigation, focus management, screen-reader support (ARIA), color contrast, forms, and media alternatives. Use when the user asks 'is this accessible', 'make this WCAG/AA compliant', 'add keyboard navigation', 'fix screen reader support', 'a11y audit', 'we got an accessibility complaint/legal notice', or whenever building/reviewing UI components with interactive behavior — even if accessibility isn't mentioned. Produces a prioritized accessibility audit (issue × WCAG criterion × severity × fix) plus the implemented fixes in code.