A11y Audit

Community

borghei

a11y-audit

This skill should be used when the user asks to "check accessibility", "audit WCAG compliance", "scan HTML for a11y issues", "check color contrast", or "find accessibility violations in web pages".

Overview

Publisher	borghei
Repository	`Claude-Skills`
Skill name	`a11y-audit`
Stars	856
Forks	154
Bundled files	4
Links	Skill source Repository Homepage

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.
4 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by borghei on GitHub. Read the source before you install it.

Installation

Install the A11y Audit AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

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.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/borghei/Claude-Skills/tree/main/engineering/a11y-audit
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.

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/borghei/Claude-Skills.git /tmp/Claude-Skills
mkdir -p .claude/skills
cp -r /tmp/Claude-Skills/engineering/a11y-audit .claude/skills/a11y-audit

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable A11y Audit 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 A11y Audit 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 A11y Audit 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.

Accessibility Audit

Category: Engineering Domain: Web Accessibility

Overview

The Accessibility Audit skill provides automated scanning of HTML files for WCAG 2.1 compliance violations and color contrast checking against AA/AAA standards. It catches missing alt text, broken heading hierarchies, unlabeled form inputs, and insufficient color contrast early in development.

Clarify First

Before running the audit, confirm these inputs. If any is unknown or vague, ASK — do not assume:

Target & scope — which HTML files, directory, or CSS to scan (determines what gets checked and the --file/--dir/--css arguments)
Conformance level — A, AA, or AAA target (sets contrast thresholds and which violations are CRITICAL vs WARNING vs INFO)
Use context — one-off remediation vs CI gate (drives --strict gating and JSON output)

Stop rule: ask only the 2-3 that most change the output. If the user says "just draft it," proceed and list your assumptions at the top of the artifact.

Quick Start

bash
# Scan HTML for WCAG violations
python scripts/a11y_scanner.py --file index.html

# Scan a directory of HTML files
python scripts/a11y_scanner.py --dir ./src/templates

# Check color contrast
python scripts/contrast_checker.py --foreground "#333333" --background "#ffffff"

# Parse CSS file for contrast issues
python scripts/contrast_checker.py --css styles.css

# JSON output for CI
python scripts/a11y_scanner.py --file index.html --format json

Tools Overview

a11y_scanner.py

Scans HTML files for WCAG 2.1 violations including structural, semantic, and interactive element issues.

Feature	Description
Image alt text	Detects missing or empty alt on non-decorative images
Heading hierarchy	Validates h1-h6 levels are sequential
Form labels	Ensures inputs have associated label elements
ARIA attributes	Checks ARIA usage correctness
Link text	Flags generic text like "click here" or "read more"
Language attribute	Checks for lang on html element
Tab order	Detects positive tabindex values
Landmarks	Validates semantic landmark usage

contrast_checker.py

Checks color contrast ratios against WCAG AA and AAA thresholds.

Feature	Description
Ratio calculation	Computes relative luminance contrast ratio
AA compliance	4.5:1 normal text, 3:1 large text
AAA compliance	7:1 normal text, 4.5:1 large text
CSS parsing	Extracts color/background pairs from CSS
Color suggestions	Recommends nearest compliant color

Workflows

Full Accessibility Audit

Scan HTML - Run a11y_scanner.py on all templates
Check contrast - Run contrast_checker.py on stylesheets
Triage - Prioritize Level A violations first
Remediate - Fix critical issues (alt text, form labels, headings)
Re-scan - Verify fixes pass all checks

CI Integration

bash
# Gate on Level A violations
python scripts/a11y_scanner.py --dir ./templates --format json --level A --strict

# Check CSS contrast
python scripts/contrast_checker.py --css ./static/css/main.css --format json

Development Workflow

Pre-commit - Quick scan of changed HTML files
PR review - Full scan as part of review checklist
Staging audit - Comprehensive scan before release
Monitoring - Regular scheduled audits

Reference Documentation

WCAG Guidelines - Conformance levels, success criteria, common fixes

Common Patterns Quick Reference

WCAG Levels

Level	Description	Typical Requirement
A	Minimum baseline	Legal compliance
AA	Industry standard	Most regulations, ADA
AAA	Enhanced	Best practice goal

Contrast Ratios

Context	AA	AAA
Normal text (<18pt)	4.5:1	7:1
Large text (>=18pt bold or >=14pt)	3:1	4.5:1
UI components	3:1	3:1

Quick Fixes

Issue	Fix
Missing alt text	`<img alt="Description of image">`
Skipped heading	Use sequential h1 through h6
No form label	`<label for="inputId">Label</label>`
Generic link text	Replace "click here" with descriptive text
Missing lang	`<html lang="en">`
Positive tabindex	Use tabindex="0" or tabindex="-1" only

Severity Mapping

CRITICAL - WCAG Level A violations
WARNING - WCAG Level AA violations
INFO - WCAG Level AAA recommendations

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 A11y Audit AI skill do?

This skill should be used when the user asks to "check accessibility", "audit WCAG compliance", "scan HTML for a11y issues", "check color contrast", or "find accessibility violations in web pages".

Why use A11y Audit on TypingMind?

Because you install it once and use it with any model. A11y Audit 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 A11y Audit in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/borghei/Claude-Skills/tree/main/engineering/a11y-audit. 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 A11y Audit?

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 A11y Audit?

As many as you like. As long as a model supports skills, you can use A11y Audit with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the A11y Audit AI skill free?

It is published on GitHub by borghei. Check the repository for licensing terms. 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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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Accessibility Audit

Overview

Clarify First

Quick Start

Tools Overview

a11y_scanner.py

contrast_checker.py

Workflows

Full Accessibility Audit

CI Integration

Development Workflow

Reference Documentation

Common Patterns Quick Reference

WCAG Levels

Contrast Ratios

Quick Fixes

Severity Mapping

Bundled files

Frequently asked questions

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