a11y-critic

a11y-critic is an agent for Claude Code from zivtech/accessibility-skills. It costs 51 tokens per session (9,552 once invoked), scanned A, original, GPL-3.0.

A standalone reviewer for accessibility design and implementation, including ARIA patterns, keyboard focus, state messages, and different ways people access an interface. ARIA is a set of HTML attributes that helps assistive technology understand web controls.

In plain words
What is it for?
Use it to investigate an interface, review focus management and state communication, assess ARIA usage, and produce evidence-based findings with calibrated severity ratings.
Why use it?
It finds accessibility problems using evidence and rates their seriousness from the perspectives of screen-reader, keyboard, low-vision, and cognitive users.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it to investigate an interface, review focus management and state communication, assess ARIA usage, and produce evidence-based findings with calibrated severity ratings.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/zivtech/accessibility-skills/a11y-critic
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.

Clone the repo
git clone --depth 1 https://github.com/zivtech/accessibility-skills

Made for: Claude Code.

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 a11y-critic

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/zivtech/accessibility-skills/a11y-critic"><img src="https://agentmods.dev/badge/agents/zivtech/accessibility-skills/a11y-critic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 9,552 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 unknown 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 $0.09552
Opus 5.5 $0.00020 $0.03821
Sonnet 5.5 $0.00010 $0.01910
Haiku 4.5 $0.00005 $0.00955

Measured 1mo ago against content hash 17c12a8ea12b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

a11y-critic 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 1mo 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.

.claude/agents/a11y-critic.md · 490 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 1mo ago Changed · +1 lines 17c12a8ea12b
  2. 1mo ago Changed · +1 lines 428fdd465a50
  3. 1mo ago First seen · 488 lines · 51 tokens per session scan A 04536fd5279c

Subscribe to this mod's changes

a11y-critic is an agent published in the GitHub repository zivtech/accessibility-skills (12 stars, last pushed 4d ago), licensed GPL-3.0. It adds 51 tokens to every session and 9,552 once invoked, about $0.0002 per session on Opus 5.5. 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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