accessibility-a11y

accessibility-a11y is a skill for Claude Code, Codex from BlackBeltTechnology/pi-agent-dashboard. It costs 44 tokens per session (1,959 once invoked), scanned A, original, MIT.

A guide to making web interfaces usable with keyboards and assistive technologies such as screen readers. It covers semantic HTML, focus behaviour, ARIA labels, skip links, and readable colour contrast.

In plain words
What is it for?
Use it when adding keyboard navigation, accessible focus states, screen-reader support, meaningful HTML structure, or WCAG contrast improvements.
Why use it?
It helps people navigate and understand the interface when they cannot use a mouse or cannot see the page normally.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when adding keyboard navigation, accessible focus states, screen-reader support, meaningful HTML structure, or WCAG contrast improvements.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y
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 BlackBeltTechnology/pi-agent-dashboard --skill accessibility-a11y
Clone the repo
git clone --depth 1 https://github.com/BlackBeltTechnology/pi-agent-dashboard

Made for: Claude Code, Codex.

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y/github.svg)](https://agentmods.dev/skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y)
Your own site
<a href="https://agentmods.dev/skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y"><img src="https://agentmods.dev/badge/skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y/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-a11y

Your own site · 80×15
<a href="https://agentmods.dev/skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y"><img src="https://agentmods.dev/badge/skills/blackbelttechnology/pi-agent-dashboard/accessibility-a11y.svg" alt="Reviewed on agentmods" width="80" 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 1,959 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 pass 7 Sept 2026
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 $0.00044 $0.01959
Opus 5 $0.00022 $0.00979
Sonnet 5 $0.00009 $0.00392
Haiku 4.5 $0.00004 $0.00196

Measured 7d ago against content hash d625fec2bdf3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

accessibility-a11y 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 7d 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.

packages/frontend-patterns/.pi/skills/accessibility-a11y/SKILL.md · 346 lines

How it starts

The opening of the file, as written. The whole thing — 346 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility (a11y)

Semantic HTML

// Use semantic elements
<header>       {/* Site header */}
<nav>          {/* Navigation */}
<main>         {/* Main content - one per page */}
<article>      {/* Self-contained content */}
<section>      {/* Thematic grouping with heading */}
<aside>        {/* Sidebar content */}
<footer>       {/* Site footer */}

// Correct heading hierarchy
<h1>Page Title</h1>           {/* One per page */}
  <h2>Section</h2>
    <h3>Subsection</h3>
  <h2>Another Section</h2>

// Lists for navigation
<nav>
  <ul>
    <li><a href="/">Home</a></li>
    <li><a href="/about">About</a></li>
  </ul>
</nav>
// components/layout/SkipLink.tsx
export function SkipLink() {
  return (
    <a
      href="#main-content"
      className="
        sr-only focus:not-sr-only
        focus:absolute focus:top-4 focus:left-4
        focus:z-50 focus:px-4 focus:py-2
        focus:bg-primary focus:text-primary-foreground
        focus:rounded
      "
    >
      Skip to main content
    </a>
  );
}

// In layout
<body>
  <SkipLink />
  <Header />
  <main id="main-content" tabIndex={-1}>
    {children}
  </main>
</body>

Focus Management

// Visible focus states (Tailwind)
<button className="
  focus:outline-none
  focus-visible:ring-2
  focus-visible:ring-ring
  focus-visible:ring-offset-2
">

// Focus trap for modals
import { useEffect, useRef } from 'react';

function useFocusTrap(isOpen: boolean) {
  const containerRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    if (!isOpen) return;
    
    const container = containerRef.current;
    if (!container) return;

    const focusableElements = container.querySelectorAll(
      'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
    );
    
    const firstElement = focusableElements[0] as HTMLElement;
    const lastElement = focusableElements[focusableElements.length - 1] as HTMLElement;

    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key !== 'Tab') return;

      if (e.shiftKey && document.activeElement === firstElement) {
        e.preventDefault();
        lastElement.focus();
      } else if (!e.shiftKey && document.activeElement === lastElement) {
        e.preventDefault();
        firstElement.focus();
      }
    };

    firstElement?.focus();
    container.addEventListener('keydown', handleKeyDown);
    
    return () => container.removeEventListener('keydown', handleKeyDown);
  }, [isOpen]);

  return containerRef;
}

Read the full file on GitHub · 346 lines

Files

What ships with it

2 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. 7d ago First seen · 346 lines · 44 tokens per session scan A d625fec2bdf3

Subscribe to this mod's changes

accessibility-a11y is a skill published in the GitHub repository BlackBeltTechnology/pi-agent-dashboard (278 stars, last pushed today), licensed MIT. It adds 44 tokens to every session and 1,959 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 2026-09-03.

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