Common Accessibility logo

Common Accessibility

Community
HoangNguyen0403
common-accessibility

Enforce WCAG 2.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs. Use when building interactive components, adding form labels, fixing focus traps, or auditing a11y compliance.

Overview

PublisherHoangNguyen0403
Repositoryagent-skills-standard
Skill namecommon-accessibility
Stars
569
Forks
164
Bundled files
2
LicenseMIT
Links
Skill sourceRepositoryHomepage
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 2 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by HoangNguyen0403 on GitHub. Read the source before you install it.

Installation

Install the Common Accessibility AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git /tmp/agent-skills-standard
mkdir -p .claude/skills
cp -r /tmp/agent-skills-standard/skills/common/common-accessibility .claude/skills/common-accessibility
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Common Accessibility in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Common Accessibility on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Common Accessibility is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Common Accessibility (a11y) Standards

Priority: P1 (HIGH)

Legal req: EU (Web Accessibility Directive), USA (ADA/Section 508). Non-compliance = litigation risk. Minimum: WCAG 2.2 Level AA.

🏗 Semantic HTML First

  • Use native HTML before ARIA. <button>, <a>, <nav>, <main>, <section>, <form>, <label> convey semantics natively.

  • Never <div>/<span> for interactive elements — no keyboard role by default.

  • Headings (h1–h6) must form logical outline. One h1 per page.

  • <button> not <div onClick>, <a> not <span onClick>.

🎭 ARIA — Use Sparingly

ARIA supplements native HTML when insufficient (e.g., custom widgets). Rules:

  1. No ARIA > Bad ARIA: If native HTML works, use it. ARIA only adds roles, not behavior.
  2. Required attributes: Every role with required properties must include them (e.g., role="slider" needs aria-valuenow, aria-valuemin, aria-valuemax).
  3. Live Regions: Use aria-live="polite" for status messages; aria-live="assertive" only for critical alerts.
  4. Labels: Every form control needs programmatic label (<label>, aria-label, or aria-labelledby).
  5. Hidden content: Use aria-hidden="true" on decorative icons; never on focusable elements.

⌨️ Keyboard Navigation

  • All interactive elements MUST reachable and operable via keyboard.
  • Tab order must follow visual reading order. No positive tabindex (tabindex="1" breaks natural order).
  • Visible focus indicators required (see Focus style rule below).
  • Modals/Dialogs: Trap focus inside when open. Return focus to trigger element on close.
  • Escape key: Must close modals, dropdowns, and tooltips.
  • Focus style: Never outline: none without visible replacement (min 2px solid, 3:1 contrast).

🎨 Color & Contrast

  • Normal text: ≥ 4.5:1 ratio. Large text (≥ 18pt or 14pt bold): ≥ 3:1. UI components: ≥ 3:1.
  • Never convey information through color alone — add icon, pattern, or text label.
  • Test with: axe DevTools, WAVE, Lighthouse.

📐 Touch & Pointer Targets

  • Minimum interactive target size: 44×44px (WCAG 2.5.5 AAA) / 24×24px minimum (WCAG 2.2 AA).
  • Sufficient spacing between adjacent targets — prevent mis-taps.

🖼 Images & Media

  • Decorative images: alt=" (empty, not missing).
  • Informative images: descriptive alt — what image conveys, not "image of…".
  • Complex charts/graphs: text summary or data table alternative.
  • Video: Captions mandatory. Audio descriptions for visual-only content.

🧪 Testing Minimum

  • CI gate: axe-core zero critical violations.
  • Manual: keyboard-only full flow + screen reader (NVDA/VoiceOver) + 200% zoom.

Anti-Patterns

  • No onClick on <div>: Use <button> or add role, tabindex, and keyboard handlers.
  • No missing alt: Every <img> must alt attribute (empty string if decorative).
  • No color-only status: Red = error must also show icon or text.
  • No outline: none without replacement focus style.
  • No auto-playing media: Users with vestibular disorders may harmed.
  • No dynamic content without announcement: Use aria-live for async status updates.

References

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Common Accessibility AI skill do?

Enforce WCAG 2.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs. Use when building interactive components, adding form labels, fixing focus traps, or auditing a11y compliance.

Why use Common Accessibility on TypingMind?

Because you install it once and use it with any model. Common Accessibility is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Common Accessibility in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/HoangNguyen0403/agent-skills-standard/tree/develop/skills/common/common-accessibility. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Common Accessibility?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Common Accessibility?

As many as you like. As long as a model supports skills, you can use Common Accessibility with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Common Accessibility AI skill free?

Yes. It is published on GitHub by HoangNguyen0403 under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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