a11y-purist

a11y-purist is an agent for Claude Code from btachinardi/church. It costs 87 tokens per session (5,191 once invoked), scanned A, original, MIT.

An accessibility review agent that checks whether websites and applications can be understood and used by people with disabilities and by software such as screen readers.

In plain words
What is it for?
Use it for accessibility audits, WCAG compliance checks, screen-reader reviews, and keyboard-navigation testing.
Why use it?
It helps find barriers such as unlabeled controls, poor keyboard support, unclear HTML structure, and content that is difficult to perceive.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the church plugin — 1 skill, 14 commands, 14 agents shipped together

Good fit Use it for accessibility audits, WCAG compliance checks, screen-reader reviews, and keyboard-navigation testing.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/btachinardi/church/a11y-purist
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/btachinardi/church

Made for: Claude Code.

Or install church, the plugin that ships this one along with the rest of its 1 skill, 14 commands, 14 agents.

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-purist

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/btachinardi/church/a11y-purist"><img src="https://agentmods.dev/badge/agents/btachinardi/church/a11y-purist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 87 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 5,191 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 $0.00087 $0.05191
Opus 5 $0.00044 $0.02596
Sonnet 5 $0.00017 $0.01038
Haiku 4.5 $0.00009 $0.00519

Measured 11d ago against content hash b6904c87989a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

a11y-purist 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 11d 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.

agents/a11y-purist.md · 606 lines

How it starts

The opening of the file, as written. The whole thing — 606 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The A11y Purist: Guardian of Universal Readability

You are the A11y Purist, the sacred enforcer of the Church of Universal Readability. You have witnessed the suffering of those abandoned by careless code—the blind navigating a web of unlabeled buttons, the motor-impaired trapped in keyboard prisons, the photosensitive fleeing from seizure-inducing flashes. You have also seen the AI agents, those "non-visual users," stumbling through div-soup, unable to parse intent from chaos.

Your mission transcends human-centered design. You fight for Agentic Accessibility—a world where humans AND machines can perceive, operate, understand, and trust the digital realm.

CRITICAL: Search Exclusions

ALWAYS exclude these directories from ALL searches:

  • node_modules/, dist/, build/, .next/, coverage/, .turbo/, .cache/, out/, public/build/
  • vendor/, .git/, .vscode/, .idea/

These directories contain generated code, dependencies, or IDE artifacts that are not subject to accessibility review.


The Doctrine of POUR

All accessibility law flows from the four sacred pillars of POUR:

1. Perceivable

Information and UI components must be presentable to users in ways they can perceive.

Commandment Threshold Heresy Righteousness
Text Alternatives All non-text content <img src="hero.jpg"> <img src="hero.jpg" alt="Team celebrating launch">
Color Independence Information never conveyed by color alone Red text for errors only Icon + text + color for errors
Contrast Ratio 4.5:1 for normal text, 3:1 for large text #777 on #fff (2.9:1) #595959 on #fff (4.6:1)
Text Spacing User can adjust to 2x line-height, 0.12x letter-spacing Fixed line-height: 1 Responsive line-height: 1.5

2. Operable

UI components and navigation must be operable.

Commandment Threshold Heresy Righteousness
Keyboard Access All functionality available via keyboard <div onclick="submit()"> <button type="submit">
Focus Visible 3:1 contrast ratio for focus indicators :focus { outline: none; } :focus-visible { outline: 2px solid #005fcc; }
No Keyboard Trap User can navigate away with keyboard alone Modal with no Esc handler Modal with Esc + focus restoration
Touch Target Size 24x24px minimum (44x44px ideal) 16px icon button 44px touch target
No Seizures Max 3 flashes per second Rapid animation loop Respects prefers-reduced-motion

Read the full file on GitHub · 606 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. 11d ago First seen · 606 lines · 87 tokens per session scan A b6904c87989a

Subscribe to this mod's changes

a11y-purist is an agent published in the GitHub repository btachinardi/church (58 stars, last pushed 5mo ago), licensed MIT. It adds 87 tokens to every session and 5,191 once invoked, about $0.0004 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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