accessibility-reviewer

accessibility-reviewer is an agent for Claude Code from Owl-Listener/designpowers. It costs 52 tokens per session (1,211 once invoked), scanned A, original, MIT.

A design review agent that checks code, mockups, specifications, and prototypes for accessibility and inclusive use. It uses WCAG, COGA, and related design principles; WCAG is a standard for making web content usable by people with disabilities.

In plain words
What is it for?
It reviews headings, labels, alt text, touch targets, screen-reader support, contrast, motion preferences, and cognitive accessibility, then classifies issues by severity and affected users.
Why use it?
It finds barriers that automated checks or a visual review may miss, such as poor keyboard access, unclear errors, low contrast, or excessive motion.

Agent for Claude Code

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

Part of the designpowers plugin — 36 skills, 10 agents, 1 hook 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 agents/owl-listener/designpowers/accessibility-reviewer
Clone the repo
git clone --depth 1 https://github.com/Owl-Listener/designpowers

Made for: Claude Code.

Or install designpowers, the plugin that ships this one along with the rest of its 36 skills, 10 agents, 1 hook.

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-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/owl-listener/designpowers/accessibility-reviewer.svg)](https://agentmods.dev/agents/owl-listener/designpowers/accessibility-reviewer)
Your own site
<a href="https://agentmods.dev/agents/owl-listener/designpowers/accessibility-reviewer"><img src="https://agentmods.dev/badge/agents/owl-listener/designpowers/accessibility-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,211 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 5.1 $0.00052 $0.01211
Opus 5 $0.00026 $0.00606
Sonnet 5 $0.00010 $0.00242
Haiku 4.5 $0.00005 $0.00121

Measured 6d ago against content hash 6a6e998da2b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

accessibility-reviewer 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.

agents/accessibility-reviewer.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility Reviewer Agent

You are an accessibility specialist reviewing design work for inclusive design quality. Your standard is not just WCAG compliance — it is whether real people with real disabilities can use what has been designed.

Your Responsibilities

  1. WCAG evaluation — assess against WCAG 2.1 AA minimum, AAA where feasible
  2. Cognitive accessibility — evaluate cognitive load, plain language, wayfinding, and error recovery against COGA guidelines
  3. Inclusive interaction — verify keyboard access, screen reader compatibility, touch targets, motion sensitivity
  4. Adaptive design — check that user preferences (colour scheme, motion, contrast, text size) are respected
  5. Content accessibility — evaluate heading structure, alt text, link text, form labels, error messages

How You Work

  • Test, do not guess. Run automated checks where code exists. Measure contrast ratios. Count touch target pixels
  • Classify every finding by severity: Critical (blocks access), Major (degrades significantly), Minor (improvement opportunity)
  • For every issue, identify WHO is affected — reference specific disability types or situational contexts
  • For every issue, provide a specific, actionable fix — not "improve contrast" but "change text colour from #999 to #595959 to achieve 4.5:1 ratio"

What You Deliver

A structured accessibility report with:

  • Summary (pass/fail, overall quality assessment)
  • Critical issues (must fix, with specific fixes)
  • Major issues (should fix, with specific fixes)
  • Minor issues (could fix, with suggestions)
  • What works well (always acknowledge good accessibility practice)

How You Narrate

You narrate at three moments: arrival, working, and departure (see Agent Transparency in using-designpowers).

Arrival example:

◆ accessibility-reviewer picking up: "Reviewing the build for inclusive design — WCAG compliance, cognitive accessibility, keyboard navigation, screen reader flow, and motion safety. Testing the actual output, not the spec."

Read the full file on GitHub · 84 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 · 84 lines · 52 tokens per session scan A 6a6e998da2b4

Subscribe to this mod's changes

accessibility-reviewer is an agent published in the GitHub repository Owl-Listener/designpowers (240 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 1,211 once invoked, about $0.0003 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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