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Agent skill

Common Accessibility

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Enforce WCAG 2.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs.

MITAuto-check passedFrontend & Design

Install Common Accessibility

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill common-accessibility -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard common-accessibility --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/common/common-accessibility .claude/skills/common-accessibility && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
common-accessibility
GitHub stars
572
Token cost
~995 tokens
SKILL.md length
410 words
Files
3 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Enforce WCAG 2.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs.

  • Works in 5 steps: No ARIA > Bad ARIA: If native HTML… → Required attributes: Every role with… → Live Regions: Use aria-live="polite" for… → …
  • Building interactive components
  • SKILL.md covers Priority: P1 (HIGH), 🏗 Semantic HTML First, 🎭 ARIA — Use Sparingly and ⌨️ Keyboard Navigation, plus 6 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Common Accessibility is an agent skill from HoangNguyen0403/agent-skills-standard. 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.

Its SKILL.md is about 1000 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/REFERENCE.md`).

It sits in Frontend & Design, covering Accessibility. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Building interactive components
  • Adding form labels
  • Fixing focus traps
  • Auditing a11y compliance

Example prompts

  • “/common-accessibility”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  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…
  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 (, aria-label, or aria-labelledby`).
  5. Hidden content: Use aria-hidden="true" on decorative icons; never on focusable elements.

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • w3.org
    • dequeuniversity.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Common Accessibility loads about 995 tokens when it runs, and up to ~1.4k if it reads all its reference files. Until then it costs about 64 tokens; SKILL.md has 410 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~64
When it runs · the whole SKILL.md, loaded when a task matches
~995
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 410 words, ~995 tokens.

Download SKILL.mdSave it as .claude/skills/common-accessibility/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
common-accessibility
description
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.

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.
Show full SKILL.md (154 more words)Show less

📐 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

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/common/common-accessibility of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/REFERENCE.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Common Accessibility next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Common Accessibility compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Common Accessibility this skillHoangNguyen0403/agent-skills-standard572—~995Automated safety check: PassMIT
Web Interface Guidelines Reviewervercel-labs/openreview1.7k97 repos~308Automated safety check: PassNone
Accessibility Reviewmarkmead/hyperui12k1 repos~1.1kAutomated safety check: PassMIT
Web Animation DesignbaptisteArno/typebot.io11k2 repos~2.7kAutomated safety check: PassCustom licence
Accessibility Fixeribelick/ui-skills9.6k4 repos~1.2kAutomated safety check: PassMIT
Wcag Audit PatternsvmDeshpande/ai-agent-automation17811 repos~610Automated safety check: PassApache-2.0

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Categories

Questions about Common Accessibility

What does Common Accessibility do?

Enforce WCAG 2.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs. Common Accessibility is an agent skill from HoangNguyen0403/agent-skills-standard.2 AA compliance with semantic HTML, ARIA roles, keyboard navigation, and color contrast standards for web UIs.

When should I use Common Accessibility?

Common Accessibility fits situations like: building interactive components; adding form labels; fixing focus traps; auditing a11y compliance.

How do I install Common Accessibility in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-accessibility -a claude-code`. Or copy the skill folder (skills/common/common-accessibility in HoangNguyen0403/agent-skills-standard) into .claude/skills/common-accessibility in your project. Claude Code loads it when a task matches its description.

How do I install Common Accessibility in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-accessibility -a codex`. Or copy the skill folder (skills/common/common-accessibility in HoangNguyen0403/agent-skills-standard) into .agents/skills/common-accessibility in your project. Codex loads it when a task matches its description.

Can I use Common Accessibility in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill common-accessibility -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/common-accessibility, .gemini/skills/common-accessibility, .github/skills/common-accessibility and .opencode/skills/common-accessibility in your project.

What does Common Accessibility need to run?

SKILL.md names no scripts, command-line tools or credentials: Common Accessibility is instructions for the agent only.

Does Common Accessibility access the network?

SKILL.md names 2 domains. As links in the text: w3.org and dequeuniversity.com. This is read from the text; nothing was executed.

Is Common Accessibility safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Common Accessibility use?

Common Accessibility is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Common Accessibility use?

About 995 tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 409 tokens, read only when the agent opens those files.

What are the alternatives to Common Accessibility?

Skills that share tags, products or a category with Common Accessibility: Web Interface Guidelines Reviewer (vercel-labs/openreview, 1.7k stars), Accessibility Review (markmead/hyperui, 12k stars), Web Animation Design (baptisteArno/typebot.io, 11k stars) and Accessibility Fixer (ibelick/ui-skills, 9.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Common Accessibility?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.