Github A11y Scanner

This teaches Claude how to work with GitHub's official accessibility scanner action, which runs axe-core against live URLs in CI and files issues for each violation. You'd use this when a repo has the scanner configured and you want Claude to parse those auto-generated issues, correlate them with local scan results for confidence boosting, or track which ones Copilot has been assigned to fix. The skill maps scanner severity levels to agent scoring, explains the cache-based delta detection (new, fixed, persistent), and shows how to detect scanner presence by grepping workflows. Solid integration pattern if you're running accessibility checks in both CI and development.