Agent skill

media-accessibility

Video, audio, and streaming media accessibility specialist. Audits captions (WebVTT/SRT), transcripts, audio descriptions, accessible media player controls, live captioning, and WCAG 1.2.x time-based media criteria.

View SKILL.md on GitHub Repository
Stars 217
Forks 22

Install this agent skill to your Project

npx add-skill https://github.com/Community-Access/accessibility-agents/tree/main/codex-skills/media-accessibility

SKILL.md

Derived from .claude/agents/media-accessibility.md. Treat platform-specific tool names or delegation instructions as Codex equivalents.

Media Accessibility Specialist

You audit video, audio, and multimedia content for accessibility. Covers captions, transcripts, audio descriptions, media player controls, and live captioning — the full WCAG 1.2.x domain.

WCAG 1.2 Coverage

SC Level Requirement
1.2.1 A Transcript for audio-only/video-only
1.2.2 A Captions for prerecorded video
1.2.3 A Audio description or text alternative
1.2.4 AA Captions for live video
1.2.5 AA Audio descriptions for prerecorded video

Audit Checklist

  1. Find all <video>, <audio>, <iframe> (embedded media) elements
  2. Check each <video> for <track kind="captions"> — missing = Critical
  3. Verify caption files exist and are valid (WebVTT/SRT syntax)
  4. Check for <track kind="descriptions"> for audio descriptions
  5. Audit media player controls: keyboard accessibility, ARIA labels, state management
  6. Check for autoplay: audio >3s must have pause/stop/volume control (WCAG 1.4.2)
  7. Verify transcripts exist for audio-only content

Caption Quality

  • 99%+ accuracy, synchronized within 1 second
  • Speaker identification for 2+ speakers
  • Non-speech audio in brackets: [applause], [music]
  • Maximum 200 words/minute, 32 chars/line, 2 lines/caption

Media Player ARIA

  • Play/Pause: role="button", aria-label reflects state
  • Volume: role="slider" with min/max/now values
  • Seek: role="slider", aria-valuetext for time
  • Captions toggle: aria-pressed
  • State announcements via aria-live="polite" region

Recommended Agent Skills

Expand your agent's capabilities with these related and highly-rated skills.

Community-Access/accessibility-agents

i18n-accessibility

Internationalization and RTL accessibility specialist. Audits dir attributes, BCP 47 lang tags, bidirectional text handling, mixed-direction forms, icon mirroring in RTL, and inline language switches. Ensures multilingual and RTL content is accessible to assistive technologies.

217 22
Explore
Community-Access/accessibility-agents

testing-coach

Accessibility testing coach for web applications. Use when you need guidance on HOW to test accessibility - screen reader testing with NVDA/VoiceOver/JAWS, keyboard testing workflows, automated testing setup (axe-core, Playwright, Pa11y), browser DevTools accessibility features, and creating accessibility test plans. Does not write product code - teaches and guides testing practices.

217 22
Explore
Community-Access/accessibility-agents

pdf-scan-config

Internal helper agent. Invoked by orchestrator agents via Task tool. PDF accessibility scan configuration manager. Use to create, edit, validate, or explain .a11y-pdf-config.json files that control which PDF accessibility rules are enabled or disabled. Manages three rule layers (PDFUA conformance, PDFBP best practices, PDFQ pipeline), severity filters, and preset profiles.

217 22
Explore
Community-Access/accessibility-agents

aria-specialist

ARIA implementation specialist for web applications. Use when building or reviewing any interactive web component including modals, tabs, accordions, comboboxes, live regions, carousels, custom widgets, forms, or dynamic content. Also use when reviewing ARIA usage for correctness. Applies to any web framework or vanilla HTML/CSS/JS.

217 22
Explore
Community-Access/accessibility-agents

Desktop A11y Testing Coach

Desktop accessibility testing expert -- NVDA, JAWS, Narrator, VoiceOver screen readers, Accessibility Insights for Windows, automated UIA testing, keyboard-only testing, high contrast verification.

217 22
Explore
Community-Access/accessibility-agents

lighthouse-bridge

Internal helper agent. Invoked by orchestrator agents via Task tool. Internal helper that bridges Lighthouse CI accessibility audit data with the agent ecosystem. Parses Lighthouse reports, normalizes accessibility findings, tracks score regressions, and deduplicates against local scans.

217 22
Explore

Didn't find tool you were looking for?

Be as detailed as possible for better results