accessibility-a11y-skill

accessibility-a11y-skill is a skill for OpenCode from darellchua2/opencode-config-template. It costs 44 tokens per session (3,092 once invoked), scanned A, original, Apache-2.0.

A web accessibility skill for building and checking interfaces that people with disabilities can use. It covers WCAG rules, keyboard use, screen readers, color contrast, semantic HTML, ARIA, and automated checks.

In plain words
What is it for?
Use it to audit or build accessible web components, fix Lighthouse or axe-core findings, test keyboard navigation, and support screen-reader users.
Why use it?
It helps find and fix barriers that may prevent users from navigating, reading, or operating a website or application.

Skill for OpenCode

Written for OpenCode: installed under .opencode/. Also seen: mentions subagents; mentions OpenCode.

Good fit Use it to audit or build accessible web components, fix Lighthouse or…

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Install with agentmods
npx agentmods add skills/darellchua2/opencode-config-template/accessibility-a11y-skill
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 darellchua2/opencode-config-template --skill accessibility-a11y-skill
Clone the repo
git clone --depth 1 https://github.com/darellchua2/opencode-config-template

Made for: OpenCode.

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-a11y-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/darellchua2/opencode-config-template/accessibility-a11y-skill.svg)](https://agentmods.dev/skills/darellchua2/opencode-config-template/accessibility-a11y-skill)
Your own site
<a href="https://agentmods.dev/skills/darellchua2/opencode-config-template/accessibility-a11y-skill"><img src="https://agentmods.dev/badge/skills/darellchua2/opencode-config-template/accessibility-a11y-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,092 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.
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 $0.00044 $0.03092
Opus 5 $0.00022 $0.01546
Sonnet 5 $0.00009 $0.00618
Haiku 4.5 $0.00004 $0.00309

Measured 6d ago against content hash 2237f3b489af, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

accessibility-a11y-skill 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 6d 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.

opencode_app/.opencode/skills/accessibility-a11y-skill/SKILL.md · 415 lines

How it starts

The opening of the file, as written. The whole thing — 415 lines — stays where its author put it; the contents beside it link to each section on GitHub.

What I do

I help you build accessible web applications that work for everyone:

  1. WCAG 2.1 Compliance: Systematic review against A/AA/AAA criteria
  2. ARIA Patterns: Correct use of roles, states, and properties
  3. Keyboard Navigation: Focus management and keyboard shortcuts
  4. Color Contrast: Verify contrast ratios and color independence
  5. Automated Audits: Configure axe-core and Lighthouse in CI
  6. Semantic HTML: Proper element selection for meaning and structure
  7. Screen Reader Testing: Testing strategies for NVDA, VoiceOver, JAWS

When to use me

Use this skill when:

  • Building UI components that must be accessible
  • Auditing an existing application for WCAG compliance
  • Setting up automated accessibility testing in CI/CD
  • Implementing keyboard navigation for complex widgets
  • Fixing accessibility violations reported by Lighthouse or axe-core
  • Creating ARIA patterns for custom components
  • Ensuring color contrast meets WCAG requirements
  • Adding screen reader support to dynamic content
  • frontend-design-skill: UI creation and visual design. This skill ensures that UI is accessible.
  • uiux-review-skill: Peer — surfaces a11y basics at axis 10 of its 13-axis rubric (alt text, labels, contrast samples, axe-core checks) and delegates deep WCAG 2.1 compliance work here. If a UI/UX review surfaces a Critical a11y finding, follow up with this skill for the full fix pattern.
  • nextjs-standard-setup-skill: Project scaffolding. This skill adds accessibility to the built components.
  • testing-subagent: Can generate accessibility-specific tests.

Step 1: Semantic HTML

Document Structure

<header role="banner">
  <nav aria-label="Main navigation">
    <ul>
      <li><a href="/" aria-current="page">Home</a></li>
      <li><a href="/about">About</a></li>
      <li><a href="/contact">Contact</a></li>
    </ul>
  </nav>
</header>

<main id="main-content">
  <h1>Page Title</h1>
  <section aria-labelledby="features-heading">
    <h2 id="features-heading">Features</h2>
    <article>
      <h3>Feature One</h3>
      <p>Description of feature one.</p>
    </article>
  </section>
</main>

<footer role="contentinfo">
  <p>&copy; 2024 Company Name</p>
</footer>

Read the full file on GitHub · 415 lines

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. 6d ago First seen · 415 lines · 44 tokens per session scan A 2237f3b489af

Subscribe to this mod's changes

accessibility-a11y-skill is a skill published in the GitHub repository darellchua2/opencode-config-template (6 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 3,092 once invoked, about $0.0002 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 2026-08-31.

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