accessibility-patterns

accessibility-patterns is a skill for Claude Code from organvm-iv-taxis/a-i--skills. It costs 51 tokens per session (2,672 once invoked), scanned A, original, Apache-2.0.

Guidance for building accessible websites that work for people using keyboards, screen readers, and other assistive technologies, following WCAG guidelines.

In plain words
What is it for?
Use it when writing semantic HTML, ARIA labels, keyboard navigation, accessible colors, or accessibility tests.
Why use it?
It helps prevent barriers such as missing labels, poor color contrast, unusable keyboard controls, and unclear page structure.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the example-skills plugin — 47 skills, 2 commands, 1 agent shipped together

Good fit Use it when writing semantic HTML, ARIA labels, keyboard navigation, accessible colors, or accessibility tests.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/organvm-iv-taxis/a-i--skills/accessibility-patterns
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add organvm-iv-taxis/a-i--skills --skill accessibility-patterns
Clone the repo
git clone --depth 1 https://github.com/organvm-iv-taxis/a-i--skills

Made for: Claude Code.

Or install example-skills, the plugin that ships this one along with the rest of its 47 skills, 2 commands, 1 agent.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for accessibility-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/organvm-iv-taxis/a-i--skills/accessibility-patterns/github.svg)](https://agentmods.dev/skills/organvm-iv-taxis/a-i--skills/accessibility-patterns)
Your own site
<a href="https://agentmods.dev/skills/organvm-iv-taxis/a-i--skills/accessibility-patterns"><img src="https://agentmods.dev/badge/skills/organvm-iv-taxis/a-i--skills/accessibility-patterns/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for accessibility-patterns

Your own site · 80×15
<a href="https://agentmods.dev/skills/organvm-iv-taxis/a-i--skills/accessibility-patterns"><img src="https://agentmods.dev/badge/skills/organvm-iv-taxis/a-i--skills/accessibility-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,672 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 66
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
  • high Prompt Injection · line 142
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00051 $0.02672
Opus 5 $0.00026 $0.01336
Sonnet 5 $0.00010 $0.00534
Haiku 4.5 $0.00005 $0.00267

Measured 12d ago against content hash 2328f09858ee, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

accessibility-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

distributions/claude/skills/accessibility-patterns/SKILL.md · 476 lines

How it starts

The opening of the file, as written. The whole thing — 476 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility Patterns

Build for everyone from the start.

Core Principles (POUR)

Principle Meaning Example
Perceivable Users can perceive content Alt text, captions, contrast
Operable Users can interact Keyboard access, enough time
Understandable Users can comprehend Clear language, predictable
Robust Works with assistive tech Valid HTML, ARIA

WCAG Levels

Level Description Target
A Minimum Must have
AA Standard Industry standard, legal requirement
AAA Enhanced Nice to have

Target Level AA for most projects.


Semantic HTML

Use the Right Element

Instead of Use
<div onclick> <button>
<span class="link"> <a href>
<div class="header"> <header>
<div class="nav"> <nav>
<div class="main"> <main>
<b> for emphasis <strong>
<i> for emphasis <em>

Document Structure

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Descriptive Page Title</title>
</head>
<body>
  <a href="#main" class="skip-link">Skip to main content</a>
  
  <header>
    <nav aria-label="Main">
      <!-- navigation -->
    </nav>
  </header>
  
  <main id="main">
    <h1>Page Title</h1>
    <!-- Only one h1 per page -->
    
    <article>
      <h2>Section</h2>
      <h3>Subsection</h3>
    </article>
  </main>
  
  <aside aria-label="Related content">
    <!-- sidebar -->
  </aside>
  
  <footer>
    <!-- footer content -->
  </footer>
</body>
</html>

Heading Hierarchy

h1 - Page title (one per page)
  h2 - Major sections
    h3 - Subsections
      h4 - Sub-subsections

Never skip levels (h1 → h3)

Images & Media

Alt Text

<!-- Informative image -->
<img src="chart.png" alt="Bar chart showing sales increased 40% in Q4">

<!-- Decorative image -->
<img src="decorative-border.png" alt="" role="presentation">

<!-- Complex image -->
<figure>
  <img src="complex-diagram.png" alt="System architecture diagram">
  <figcaption>
    Detailed description of the system architecture...
  </figcaption>
</figure>

<!-- Image as link -->
<a href="/products">
  <img src="product.jpg" alt="View our products">
</a>

Read the full file on GitHub · 476 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 476 lines · 51 tokens per session scan A 2328f09858ee

Subscribe to this mod's changes

accessibility-patterns is a skill published in the GitHub repository organvm-iv-taxis/a-i--skills (17 stars, last pushed 15d ago), licensed Apache-2.0. It adds 51 tokens to every session and 2,672 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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