Web Interface Guidelines Reviewer
vercel-labs/openreview
Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my…
Shared contract for the Accessibility Agents skills - dispatch, findings schema, report rules.
Install A11y Core
$ npx skills add Community-Access/accessibility-agents --skill a11y-core -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Community-Access/accessibility-agents a11y-core --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Community-Access/accessibility-agents.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/a11y-core .claude/skills/a11y-core && rm -rf skills-srcUse ~/.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/
Install the "a11y-core" agent skill from https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-core into .claude/skills/a11y-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "a11y-core", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-coreType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Community-Access/accessibility-agents --skill a11y-core -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Community-Access/accessibility-agents a11y-core --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Community-Access/accessibility-agents.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/a11y-core .agents/skills/a11y-core && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "a11y-core" agent skill from https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-core into .agents/skills/a11y-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "a11y-core", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Community-Access/accessibility-agents --skill a11y-core -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Community-Access/accessibility-agents a11y-core --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Community-Access/accessibility-agents.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/a11y-core .cursor/skills/a11y-core && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "a11y-core" agent skill from https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-core into .cursor/skills/a11y-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "a11y-core", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Community-Access/accessibility-agents.git --path skills/a11y-core--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Community-Access/accessibility-agents --skill a11y-core -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Community-Access/accessibility-agents a11y-core --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Community-Access/accessibility-agents.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/a11y-core .gemini/skills/a11y-core && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "a11y-core" agent skill from https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-core into .gemini/skills/a11y-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "a11y-core", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Community-Access/accessibility-agents a11y-coreInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Community-Access/accessibility-agents --skill a11y-core -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Community-Access/accessibility-agents.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/a11y-core .github/skills/a11y-core && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "a11y-core" agent skill from https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-core into .github/skills/a11y-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "a11y-core", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Community-Access/accessibility-agents --skill a11y-core -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Community-Access/accessibility-agents a11y-core --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Community-Access/accessibility-agents.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/a11y-core .opencode/skills/a11y-core && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "a11y-core" agent skill from https://github.com/Community-Access/accessibility-agents/tree/main/skills/a11y-core into .opencode/skills/a11y-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "a11y-core", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
a11y-core- GitHub stars
- 423
- Token cost
- ~1.2k tokens
- SKILL.md length
- 600 words
- Files
- 9 (incl. scripts, references)
- Skills in repo
- 108
- Repo updated
- First seen
- Licence
- MIT
At a glance
Shared contract for the Accessibility Agents skills - dispatch, findings schema, report rules.
- Works in 7 steps: Metadata: date, tool versions, scope,… → Executive summary: score out of 100, A-F… → Findings: rule ID, WCAG criterion,… → …
- Tasks that involve Accessibility
- SKILL.md covers Tiers, Dispatch contract, Output contract and Non-negotiable standards, plus 3 more sections
- Runs JavaScript scripts from its folder; calls node
What it does
A11y Core is an agent skill from Community-Access/accessibility-agents. Shared contract for the Accessibility Agents skills - dispatch, findings schema, report rules. Read by skills, never dispatched on its own.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 12 other files, including scripts and reference files (for example `agents/openai.yaml`, `references/sources.md` and `schemas/findings.schema.json`).
It sits in Frontend & Design, covering Accessibility. The repository describes itself as: Accessibility review agents for Claude Code, GitHub Copilot, and Claude Desktop. Eleven specialists that enforce WCAG 2.2 AA compliance so AI coding tools stop generating… The licence is MIT.
When your agent uses it
- Tasks that involve Accessibility
Example prompts
- “/a11y-core”
Requirements
- Node.js
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Metadata: date, tool versions, scope, scan configuration used
- Executive summary: score out of 100, A-F grade, counts by severity, verdict
- Findings: rule ID, WCAG criterion, severity, location, description, fix
- Severity breakdown by critical, serious, moderate, minor
- Remediation priorities, ordered by impact against effort
- Next steps and a re-scan timeline
- Delta against the previous report when one exists: fixed, new, persistent, regressed
What it can do on your machine
Read from SKILL.md and the folder at commit decf6ba. 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
Ships 4 files in scripts/ (JavaScript), which the agent can run.
Shell commands in SKILL.md call:
node
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
A11y Core loads about 1.2k tokens when it runs, and up to ~7.6k if it reads all its reference files. Until then it costs about 37 tokens; SKILL.md has 600 words of instructions outside code blocks.
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); the scripts in this folder are not scanned.
SKILL.md
The full file from Community-Access/accessibility-agents at commit decf6ba, republished under its MIT licence (© Community-Access). 600 words, ~1,225 tokens.
Download SKILL.mdSave it as
.claude/skills/a11y-core/SKILL.md (or your agent's skills folder). This skill also uses 8 other files; get the full folder from GitHub.- name
- a11y-core
- description
- Shared contract for the Accessibility Agents skills - dispatch, findings schema, report rules. Read by skills, never dispatched on its own.
- license
- MIT
- disable-model-invocation
- true
- user-invocable
- false
- metadata.tier
- reference
- metadata.domain
- cross-cutting
- metadata.output
- none
- metadata.effort
- low
- metadata.title
- Accessibility Agents Core
Shared rules for every skill in the Accessibility Agents package. Skills point here instead of repeating this text. Read the section you need.
Tiers
Every skill sits in one of four tiers. The tier decides who can start it and what it is allowed to cost.
| Tier | What it is | Who invokes it |
|---|---|---|
| router | The six entry points: accessibility-lead, web-accessibility-wizard, document-accessibility-wizard, markdown-a11y-assistant, developer-hub, github-hub | The model or the user |
| specialist | One accessibility domain, one checklist, one findings payload | A router, by pointer |
| helper | Mechanical work: inventory, scanning one file, CSV export, scan config | A router, by pointer |
| reference | Rule tables, URL registries, scoring formulas. kb- prefix | Cited by a skill that needs the data |
Only routers are model-invocable. Specialists and helpers stay out of every client's skill catalog so they cost nothing until a router names one.
Dispatch contract
A router dispatches a specialist with the client's own subagent primitive. Keep the prompt at this shape and this size. Never read a specialist's instructions into the router's own context, and never paste a specialist body into a prompt.
Activate the skill "aria-specialist". If skill activation is unavailable,
read skills/aria-specialist/SKILL.md and follow it.
Task: <one paragraph, what to check and why>
Scope: <file list or glob>
Rules: semantic HTML before ARIA; report, do not edit.
Return ONLY JSON matching skills/a11y-core/schemas/findings.schema.json.Per client: Claude Code uses the Agent tool, Codex spawns a worker subagent, Copilot uses a subagent or handoff, Gemini and Antigravity use the generalist agent. The prompt is the same in all four.
The specialist reads its own instructions inside its own context. The router receives JSON. Nothing else crosses the boundary.
Output contract
Skills declare metadata.output, and it decides what they return.
- findings - only JSON matching
schemas/findings.schema.json. No prose, no preamble, no restated instructions. - report - collect findings JSON from each dispatched skill, write them to
.a11y-history/<timestamp>/, then render withnode skills/a11y-core/scripts/render-report.mjs. Never type a report by hand. - artifact - produce the file or script asked for; report the paths written and what each changes.
- guidance - answer the question, cite the criterion or API by name, stop.
Severity is one of critical, serious, moderate, minor. Confidence is
high, medium or low. A finding without a location and a fix is not a
finding.
Show full SKILL.md (269 more words)Show less
Non-negotiable standards
These hold for every web skill in the package and do not need restating in a dispatch prompt.
- Semantic HTML before ARIA. A
buttonelement beatsdiv role="button". - One H1 per page. Never skip heading levels.
- Every interactive element reachable and operable by keyboard.
- Text contrast 4.5:1. UI component and graphical object contrast 3:1.
- No information carried by color alone.
- Focus managed on route change, dynamic content and deletion.
- Dialogs trap focus and return it on close.
- Dynamic content updates are announced.
Report requirements
Any audit report this package produces carries all of these, or it is a triage result and must say so in its opening line.
- Metadata: date, tool versions, scope, scan configuration used
- Executive summary: score out of 100, A-F grade, counts by severity, verdict
- Findings: rule ID, WCAG criterion, severity, location, description, fix
- Severity breakdown by critical, serious, moderate, minor
- Remediation priorities, ordered by impact against effort
- Next steps and a re-scan timeline
- Delta against the previous report when one exists: fixed, new, persistent, regressed
The renderer emits all seven from findings JSON and embeds the merged JSON in a fenced block at the end of the report, which is what makes the next delta cheap.
Files here
schemas/findings.schema.json- the one findings shapereferences/sources.md- every specification the skills cite, grouped by skillscripts/measure-context.mjs- context cost accounting and budget check
Scan configuration
If the workspace root holds .a11y-office-config.json, .a11y-pdf-config.json,
.a11y-epub-config.json or .a11y-web-config.json, read it and honour it. Do
not fall back to defaults when a config file exists. Profiles for strict,
moderate and minimal live in templates/.
© Community-Access, 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 8 other files (scripts, references) in skills/a11y-core of Community-Access/accessibility-agents.
- SKILL.md
- agents/openai.yaml
- references/sources.md
- schemas/findings.schema.json
- schemas/wcag22-criteria.json
- scripts/measure-context.mjs
- scripts/merge-findings.mjs
- scripts/render-report.mjs
- scripts/test-findings-contract.mjs
Open the folder on GitHubat commit decf6ba
Compare with similar skills
A11y Core 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| A11y Core this skillCommunity-Access/accessibility-agents | 423 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Web Interface Guidelines Reviewervercel-labs/openreview | 1.7k | 97 repos | ~308 | Automated safety check: Pass | None | |
| Accessibility Reviewmarkmead/hyperui | 12k | 1 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Web Animation DesignbaptisteArno/typebot.io | 11k | 2 repos | ~2.7k | Automated safety check: Pass | Custom licence | |
| Accessibility Fixeribelick/ui-skills | 9.5k | 4 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Wcag Audit PatternsvmDeshpande/ai-agent-automation | 178 | 11 repos | ~610 | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
Accessibility Review
markmead/hyperui
Run a WCAG 2.1 AA accessibility audit on a design or page. An agent skill from markmead/hyperui.
Web Animation Design
baptisteArno/typebot.io
Guides easing, timing and animation choices for UI motion, based on a web animation course, and reviews existing animations in a before-and-after table.
Accessibility Fixer
ibelick/ui-skills
Audits and fixes HTML accessibility problems such as ARIA labels, keyboard navigation, focus management, contrast and form errors with minimal changes.
Wcag Audit Patterns
vmDeshpande/ai-agent-automation
Conduct WCAG 2.2 accessibility audits with automated testing, manual verification, and remediation guidance.
Baseline UI
ibelick/ui-skills
Applies a fixed set of UI rules for stack, components, interaction, animation, typography and layout, or reviews a file against them with concrete fixes.
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Related
Categories
Questions about A11y Core
What does A11y Core do?
Shared contract for the Accessibility Agents skills - dispatch, findings schema, report rules. A11y Core is an agent skill from Community-Access/accessibility-agents. Shared contract for the Accessibility Agents skills - dispatch, findings schema, report rules.
When should I use A11y Core?
A11y Core fits situations like: tasks that involve Accessibility.
How do I install A11y Core in Claude Code?
Run `npx skills add Community-Access/accessibility-agents --skill a11y-core -a claude-code`. Or copy the skill folder (skills/a11y-core in Community-Access/accessibility-agents) into .claude/skills/a11y-core in your project. Claude Code loads it when a task matches its description.
How do I install A11y Core in Codex?
Run `npx skills add Community-Access/accessibility-agents --skill a11y-core -a codex`. Or copy the skill folder (skills/a11y-core in Community-Access/accessibility-agents) into .agents/skills/a11y-core in your project. Codex loads it when a task matches its description.
Can I use A11y Core 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 Community-Access/accessibility-agents --skill a11y-core -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/a11y-core, .gemini/skills/a11y-core, .github/skills/a11y-core and .opencode/skills/a11y-core in your project.
What does A11y Core need to run?
Going by SKILL.md and its folder, A11y Core needs JavaScript for the scripts in its folder and the command-line tools its instructions call (node). Our summary lists: Node.js.
Does A11y Core access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is A11y Core 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does A11y Core use?
A11y Core is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does A11y Core use?
About 1.2k tokens (SKILL.md is roughly 4.9k 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 6.4k tokens, read only when the agent opens those files.
What are the alternatives to A11y Core?
Skills that share tags, products or a category with A11y Core: 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, 9.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains A11y Core?
Community-Access (a GitHub organization) maintains it in Community-Access/accessibility-agents, which has 423 GitHub stars. The repository holds 108 skills in this directory. The repository was last updated on September 23, 2026.
Source: Community-Access/accessibility-agents on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.