Accessibility Skill | Agent Skills

Accessibility

Comprehensive patterns for building accessible web applications: WCAG 2.2 AA compliance, keyboard focus management, React Aria component patterns, native HTML-first philosophy, cognitive inclusion, and user preference honoring. Each category has individual rule files in rules/ loaded on-demand.

Quick Reference

| Category | Rules | Impact | When to Use | |----------|-------|--------|-------------| | WCAG Compliance | 3 | CRITICAL | Color contrast, semantic HTML, automated testing | | POUR Exit Criteria | 1 | CRITICAL | Falsifiable pass/fail thresholds for each WCAG 2.2 AA criterion | | Static Anti-Patterns | 1 | HIGH | Grep-able patterns detectable without a browser | | Focus Management | 3 | HIGH | Focus traps, focus restoration, keyboard navigation | | React Aria | 3 | HIGH | Accessible components, form hooks, overlay patterns | | Modern Web Accessibility | 3 | CRITICAL/HIGH | Native HTML first, cognitive inclusion, user preferences |

Total: 14 rules across 6 categories

Quick Start

// Semantic HTML with ARIA
<main>
  <article>
    <header><h1>Page Title</h1></header>
    <section aria-labelledby="features-heading">
      <h2 id="features-heading">Features</h2>
    </section>
  </article>
</main>

// Focus trap with React Aria
import { FocusScope } from 'react-aria';

<FocusScope contain restoreFocus autoFocus>
  <div role="dialog" aria-modal="true">
    {children}
  </div>
</FocusScope>

WCAG Compliance

WCAG 2.2 AA implementation for inclusive, legally compliant web applications.

| Rule | File | Key Pattern | |------|------|-------------| | Color Contrast | ${CLAUDE_SKILL_DIR}/rules/wcag-color-contrast.md | 4.5:1 text, 3:1 UI components, focus indicators | | Semantic HTML | ${CLAUDE_SKILL_DIR}/rules/wcag-semantic-html.md | Landmarks, headings, ARIA labels, form structure | | Testing | ${CLAUDE_SKILL_DIR}/rules/wcag-testing.md | axe-core, Playwright a11y, screen reader testing |

POUR Exit Criteria

Concrete pass/fail thresholds for each WCAG 2.2 AA criterion — replaces vague "meets requirements" checks.

| Rule | File | Key Pattern | |------|------|-------------| | POUR Exit Criteria | ${CLAUDE_SKILL_DIR}/rules/pour-exit-criteria.md | Falsifiable checklist: image alt, contrast ratios, focus indicators, touch targets, ARIA states |

Static Anti-Patterns

Grep-able anti-patterns detectable via static analysis or code review — no browser needed.

| Rule | File | Key Pattern | |------|------|-------------| | A11y Anti-Patterns (Static) | ${CLAUDE_SKILL_DIR}/rules/a11y-antipatterns-static.md | Focus removal, missing labels, autoplay, icon-only buttons, div-click handlers |

Focus Management

Keyboard focus management patterns for accessible interactive widgets.

| Rule | File | Key Pattern | |------|------|-------------| | Focus Trap | ${CLAUDE_SKILL_DIR}/rules/focus-trap.md | Modal focus trapping, FocusScope, Escape key | | Focus Restoration | ${CLAUDE_SKILL_DIR}/rules/focus-restoration.md | Return focus to trigger, focus first error | | Keyboard Navigation | ${CLAUDE_SKILL_DIR}/rules/focus-keyboard-nav.md | Roving tabindex, skip links, arrow keys |

React Aria

Adobe React Aria hooks for building WCAG-compliant interactive UI.

| Rule | File | Key Pattern | |------|------|-------------| | Components | ${CLAUDE_SKILL_DIR}/rules/aria-components.md | useButton, useDialog, useMenu, FocusScope | | Forms | ${CLAUDE_SKILL_DIR}/rules/aria-forms.md | useComboBox, useTextField, useListBox | | Overlays | ${CLAUDE_SKILL_DIR}/rules/aria-overlays.md | useModalOverlay, useTooltip, usePopover |

Modern Web Accessibility

2026 best practices: native HTML first, cognitive inclusion, and honoring user preferences.

| Rule | File | Key Pattern | |------|------|-------------| | Native HTML First | ${CLAUDE_SKILL_DIR}/rules/wcag-native-html-first.md | <dialog>, <details>, native over custom ARIA | | Cognitive Inclusion | ${CLAUDE_SKILL_DIR}/rules/wcag-cognitive-inclusion.md | ADHD/autism/dyslexia support, chunked content, notification management | | User Preferences | ${CLAUDE_SKILL_DIR}/rules/wcag-user-preferences.md | prefers-reduced-motion, forced-colors, prefers-contrast, zoom |

Key Decisions

| Decision | Recommendation | |----------|----------------| | Conformance level | WCAG 2.2 AA (legal standard: ADA, Section 508) | | Contrast ratio | 4.5:1 normal text, 3:1 large text and UI components | | Target size | 24px min (WCAG 2.5.8), 44px for touch | | Focus indicator | 3px solid outline, 3:1 contrast | | Component library | React Aria hooks for control, react-aria-components for speed | | State management | react-stately hooks (designed for a11y) | | Focus management | FocusScope for modals, roving tabindex for widgets | | Testing | jest-axe (unit) + Playwright axe-core (E2E) |

Anti-Patterns (FORBIDDEN)

Div soup: Using <div> instead of semantic elements (<nav>, <main>, <article>)
Color-only information: Status indicated only by color without icon/text
Missing labels: Form inputs without associated <label> or aria-label
Keyboard traps: Focus that cannot escape without Escape key
Removing focus outline: outline: none without replacement indicator
Positive tabindex: Using tabindex > 0 (disrupts natural order)
Div with onClick: Using <div onClick> instead of <button> or useButton
Manual focus in modals: Using useEffect + ref.focus() instead of FocusScope
Auto-playing media: Audio/video that plays without user action
ARIA overuse: Using ARIA when semantic HTML suffices

Detailed Documentation

| Resource | Description | |----------|-------------| | ${CLAUDE_SKILL_DIR}/scripts/ | Templates: accessible form, focus trap, React Aria components | | ${CLAUDE_SKILL_DIR}/checklists/ | WCAG audit, focus management, React Aria component checklists | | ${CLAUDE_SKILL_DIR}/references/ | WCAG criteria reference, focus patterns, React Aria hooks API | | ${CLAUDE_SKILL_DIR}/references/ux-thresholds-quick.md | UI/UX thresholds quick reference: contrast, touch targets, cognitive load, typography, forms | | ${CLAUDE_SKILL_DIR}/examples/ | Complete accessible component examples |

Related Skills

ork:testing-e2e - E2E testing patterns including accessibility testing
design-system-starter - Accessible component library patterns
ork:i18n-date-patterns - RTL layout and locale-aware formatting
motion-animation-patterns - Reduced motion and animation accessibility

Agent Skills: Accessibility

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