a11y-audit

---
name: a11y-audit
description: Audit a UI or design against WCAG 2.2 AA/AAA and ARIA patterns, returning criterion-referenced findings with severity and specific fixes. Use when the user wants an accessibility check, contrast verification, keyboard/screen-reader review, or wants to confirm a component meets POUR.
---

# Skill: Accessibility Audit

## Requirements

This skill needs the full UX/UI Agent Skills kit: the gates, the references and
the design-system library. Install it with `npx ux-ui-agent-skills@3.1.0 init`
or as the Claude Code plugin. `npx skills@1.7.6 add` copies the skill folder and
nothing else. Installed that way, this skill runs in **guidance-only mode**: no gate
runs, so it gives no verdict.

> **Step 0: is the kit here?** Check once:
> `ls ${CLAUDE_SKILL_DIR}/../../../tokens >/dev/null 2>&1 && echo KIT_OK || echo KIT_MISSING`
> On `KIT_MISSING`, open your reply with: "Guidance-only mode: the UX/UI Agent
> Skills kit is not installed here, so no gate ran and nothing below is
> measured." Then work from this file and general practice, under three rules.
> Do not guess or cite the contents of a kit file you could not open. State no
> measured number (no contrast ratio, no N/N, no "passes WCAG"): write "not
> verified" where one would go. End with a line `Skipped (kit not installed):`
> that names every gate script this file tells you to run, then the install
> command above.

Evaluate against WCAG 2.2 and the project's ARIA patterns.

## Steps
1. Read `${CLAUDE_SKILL_DIR}/../../../accessibility/wcag-checklist.md` (POUR-organized, P0/P1/P2) and `${CLAUDE_SKILL_DIR}/../../../accessibility/aria-patterns.md`.
2. Check the mandatory P0 set per component: keyboard navigable, focus visible (≥3:1), screen-reader name/role/state, contrast (4.5:1 text / 3:1 UI), target size ≥24×24, no color-only signaling.
3. Verify WCAG 2.2 additions: Focus Not Obscured (2.4.11), Target Size (2.5.8), Accessible Authentication (3.3.8).
4. **Contrast: measure, don't eyeball.** For rendered HTML, RUN the real-render gates and report their actual output (CLAUDE.md → Verification Protocol): `node ${CLAUDE_SKILL_DIR}/../../../scripts/gate.mjs measure_render.mjs <file> [--dark]` (every text element) AND `node ${CLAUDE_SKILL_DIR}/../../../scripts/gate.mjs verify_states.mjs <file> [--dark]` (every interactive element in default/hover/focus; catches hover-state failures). For loose color pairs, `python3 ${CLAUDE_SKILL_DIR}/../../../scripts/contrast.py "<fg>" "<bg>"`. Never state a ratio you did not measure.
5. Check reduced-motion handling (`${CLAUDE_SKILL_DIR}/../../../taste/motion-choreography.md`).

## Output
A findings table: WCAG criterion (e.g. 1.4.3) · severity (P0/P1/P2) · what fails · specific fix. Confirm passes explicitly. Accessibility may never be traded for aesthetics.