Agent-Skills.md

Agent Skills: Accessibility

Accessibility patterns for WCAG 2.2 compliance, keyboard focus management, React Aria component patterns, cognitive inclusion, native HTML-first philosophy, and user preference honoring. Use when implementing screen reader support, keyboard navigation, ARIA patterns, focus traps, accessible component libraries, reduced motion, or cognitive accessibility.

document-asset-creationID: yonatangross/orchestkit/accessibility

Repository

yonatangross/orchestkit
yonatangrossLicense: MIT
13314

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pnpm dlx add-skill https://github.com/yonatangross/orchestkit/tree/HEAD/src/skills/accessibility

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src/skills/accessibility/SKILL.md

Skill Metadata

Name
accessibility
Description
Accessibility patterns for WCAG 2.2 compliance, keyboard focus management, React Aria component patterns, cognitive inclusion, native HTML-first philosophy, and user preference honoring. Use when implementing screen reader support, keyboard navigation, ARIA patterns, focus traps, accessible component libraries, reduced motion, or cognitive accessibility.

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 | 1 | HIGH | Keyboard navigation; trap/restoration mechanics live upstream | | React Aria | 2 | HIGH | Accessible components and form hooks; overlay APIs live upstream | | Modern Web Accessibility | 2 | CRITICAL/HIGH | Native HTML first, user preferences; cognitive ceilings in references/ork-delta.md |

Total: 10 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_PLUGIN_ROOT}/skills/accessibility/rules/wcag-color-contrast.md | 4.5:1 text, 3:1 UI components, focus indicators | | Semantic HTML | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/rules/wcag-semantic-html.md | Landmarks, headings, ARIA labels, form structure | | Testing | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/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_PLUGIN_ROOT}/skills/accessibility/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_PLUGIN_ROOT}/skills/accessibility/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 | |------|------|-------------| | Keyboard Navigation | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/rules/focus-keyboard-nav.md | Roving tabindex, skip links, arrow keys |

Focus trap and restoration mechanics are upstream's job: use React Aria <FocusScope contain restoreFocus autoFocus> (see Upstream coverage). When React Aria is unavailable, copy ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/scripts/focus-trap-template.tsx; the house rules for both live in ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/references/ork-delta.md.

React Aria

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

| Rule | File | Key Pattern | |------|------|-------------| | Components | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/rules/aria-components.md | useButton, useDialog, useMenu, FocusScope | | Forms | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/rules/aria-forms.md | useComboBox, useTextField, useListBox |

Overlay hook APIs (useModalOverlay, useTooltip, usePopover) are documented upstream (see Upstream coverage); the house overlay recipe (FocusScope plus shared motion presets) is in ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/references/ork-delta.md.

Modern Web Accessibility

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

| Rule | File | Key Pattern | |------|------|-------------| | Native HTML First | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/rules/wcag-native-html-first.md | <dialog>, <details>, native over custom ARIA | | User Preferences | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/rules/wcag-user-preferences.md | prefers-reduced-motion, forced-colors, prefers-contrast, zoom |

Cognitive inclusion (ADHD/autism/dyslexia support) is covered upstream by W3C COGA (see Upstream coverage); the house cognitive-load ceilings (notification cap, nav-item cap, reading-level targets) are in ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/references/ork-delta.md.

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

Upstream coverage (do not restate)

Vendor tutorials, API references, and criterion walkthroughs removed in the 2026-07-31 wrap-plus-delta thinning. Consult the first-party source; only the ork delta (floors, scars, house decisions) lives in ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/references/ork-delta.md.

| Topic | First-party source | |-------|--------------------| | WCAG 2.2 success-criterion walkthroughs and audit checklists | WCAG 2.2 quick reference and WCAG 2.2 spec | | ARIA widget patterns and keyboard interaction models | WAI-ARIA Authoring Practices Guide | | React Aria hook APIs (useButton, useMenu, useComboBox, useModalOverlay, useTooltip, usePopover), component checklists, worked examples | React Aria docs | | Focus trap, focus restoration, roving tabindex, and skip-link algorithms | React Aria FocusScope and APG patterns | | Cognitive accessibility guidance (COGA) | W3C Making Content Usable | | Screen reader testing walkthroughs (NVDA, JAWS, VoiceOver, TalkBack) | WebAIM screen reader testing |

Detailed Documentation

| Resource | Description | |----------|-------------| | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/scripts | Templates: accessible form, focus trap, React Aria components | | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/references/ork-delta.md | Ork-specific floors, scars, and house decisions (cognitive ceilings, overlay recipe, canonical focus-trap selector) | | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/references/ux-thresholds-quick.md | UI/UX thresholds quick reference: contrast, touch targets, cognitive load, typography, forms | | ${CLAUDE_PLUGIN_ROOT}/skills/accessibility/examples/wcag-examples.md | Complete accessible form, modal, and navigation 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