accessibility

accessibility is a skill for Claude Code, Codex from xobotyi/cc-foundry. It costs 70 tokens per session (2,980 once invoked), scanned B, original, MIT.

A web accessibility guide for making websites usable by people with different abilities, including people who use keyboards or screen readers. It focuses on semantic HTML, limited ARIA use, keyboard access, focus, forms, and WCAG 2.2 AA checks.

In plain words
What is it for?
Use it when writing, reviewing, refactoring, or debugging accessible HTML, CSS, JavaScript, and interactive components such as dialogs, tabs, menus, and comboboxes.
Why use it?
It helps find and prevent barriers such as unlabeled form fields, unreachable controls, incorrect screen-reader information, and broken keyboard focus.

Skill for Claude CodeCodex

Part of the frontend plugin — 6 skills shipped together

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.

agentmods
npx agentmods add skills/xobotyi/cc-foundry/accessibility
Any agent
npx skills add xobotyi/cc-foundry --skill accessibility
Clone the repo
git clone --depth 1 https://github.com/xobotyi/cc-foundry

Made for: Claude Code, Codex.

Or install frontend, the plugin that ships this one along with the rest of its 6 skills.

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/xobotyi/cc-foundry/accessibility.svg)](https://agentmods.dev/skills/xobotyi/cc-foundry/accessibility)
Your own site
<a href="https://agentmods.dev/skills/xobotyi/cc-foundry/accessibility"><img src="https://agentmods.dev/badge/skills/xobotyi/cc-foundry/accessibility.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,980 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
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 $0.00070 $0.02980
Opus 5 $0.00035 $0.01490
Sonnet 5 $0.00014 $0.00596
Haiku 4.5 $0.00007 $0.00298

Measured 4d ago against content hash c27017fc83bd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

accessibility scanned grade B with 1 finding 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 4d 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.

Strips warnings and disclaimersmediumAnti-refusal

Omitting safety caveats hides risk from the user and is a common jailbreak preamble.

- Don't lecture -- state what's wrong and how to fix it.
plugins/frontend/skills/accessibility/SKILL.md · 290 lines

How it starts

The opening of the file, as written. The whole thing — 290 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility

Semantic HTML is the foundation. ARIA is the patch. Keyboard access is non-negotiable. If an element looks interactive, it must be interactive for everyone.

Target WCAG 2.2 AA conformance unless the project explicitly specifies otherwise. AA includes all A criteria.

References

  • Semantic HTMLsemantic-html.md: Landmarks, headings, images, tables, lists, language markup
  • ARIAaria.md: Roles, states, properties, naming, live regions, common mistakes
  • Keyboardkeyboard.md: Focus order, visibility, roving tabindex, focus traps, restoration
  • Formsforms.md: Labels, grouping, required fields, validation, autocomplete
  • Component patternscomponent-patterns.md: Dialog, tabs, accordion, disclosure, menu, combobox, tooltip
  • WCAGwcag.md: Full WCAG 2.2 AA criteria tables and compliance checklist

1. Semantic HTML

Use the right element for the right job. Native elements provide built-in keyboard support, screen reader announcements, and focus management that ARIA can only approximate.

Landmarks

  • Every page must have exactly one <main>.
  • <header>/<footer> map to banner/contentinfo only as direct children of <body> -- nested inside <article>, <section>, etc. they lose their landmark role.
  • Label multiple <nav> elements with aria-label or aria-labelledby.
  • Never duplicate implicit roles (<main role="main">, <nav role="navigation">).
  • Include all perceivable content within a landmark region.

For the full landmark-to-role mapping table, see semantic-html.md.

Headings

  • One <h1> per page identifying the primary content.
  • Never skip heading levels -- <h1> then <h3> breaks the outline.
  • Use headings for structure, not visual styling.
  • Every <section> and major content area should begin with a heading.

Read the full file on GitHub · 290 lines

Files

What ships with it

7 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. 4d ago First seen · 290 lines · 70 tokens per session scan B c27017fc83bd

Subscribe to this mod's changes

accessibility is a skill published in the GitHub repository xobotyi/cc-foundry (20 stars, last pushed yesterday), licensed MIT. It adds 70 tokens to every session and 2,980 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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