The most citation-dense accessibility reference in this gallery: fourteen numbered principles (focus-visible over bare focus, roving tabindex on composite widgets, aria-describedby wiring for form errors, minimum 24×24px hit targets per WCAG 2.5.8) each paired with a “common mistakes” table of real before/after code, not just prose rules.
It’s structured to be skimmed under pressure — a quick-reference table routes to per-topic files (focus-and-keyboard, semantics-and-aria, forms, screen-readers, hit-areas, motion-and-zoom) so a review doesn’t have to load everything at once. The review output format itself is opinionated: findings grouped by principle, a Block/Needs-changes/Approve verdict gated strictly on whether any HIGH-severity finding survives.
Install: jakubkrehel/skills ships a .claude-plugin manifest — install as a plugin, or copy skills/better-accessibility/ (with its reference files) manually.
Gotcha: several principles explicitly hand off to sibling skills in the same repo (contrast math to better-colors, input-zoom sizing to better-typography) — install those alongside it if you want the cross-references to resolve to real skills rather than dead ends.