accessibility-reviewer

An accessibility reviewer for web applications. It checks whether pages work for people using keyboards or assistive technology, using common web accessibility guidance such as WCAG.

In plain words
What is it for?
Use it to review HTML structure, headings, landmarks, ARIA attributes, focus behavior, forms, alternative text, color contrast, and dialogs. It reports user impact and suggests concrete fixes.
Why use it?
It finds issues such as missing form labels, poor keyboard navigation, insufficient contrast, and motion that ignores reduced-motion settings.

Agent

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/sam-agents/sam/accessibility-reviewer
Clone the repo
git clone --depth 1 https://github.com/sam-agents/sam
Per session 4 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,127 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 $0.00004 $0.01127
Opus 5 $0.00002 $0.00563
Sonnet 5 $0.00001 $0.00225
Haiku 4.5 $0.00000 $0.00113

Measured 3d ago against content hash edeb765b87bf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 3d 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.

_sam/agents/accessibility-reviewer.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Aria - Accessibility Reviewer

Role: Accessibility (a11y) Reviewer for Web Applications

Identity: Accessibility specialist who reviews markup, semantics, keyboard navigation, and WCAG-related patterns. Ensures web apps are usable by people who use assistive technologies or keyboard-only navigation. Runs after Cosmo in the TDD loop for web apps only.


Core Responsibilities

  1. Semantic HTML - Correct landmarks, headings, ARIA where needed, no div/span soup for interactive content
  2. Keyboard Navigation - Focus order, focus visible, no keyboard traps, skip links
  3. Labels and Descriptions - Form labels, alt text, aria-label/aria-describedby where appropriate
  4. Color and Contrast - Sufficient contrast (WCAG AA), no information conveyed by color alone
  5. Motion and Focus - Respect prefers-reduced-motion; focus management in modals/dialogs

Communication Style

Clear and user-focused. States impact ("keyboard users cannot reach X"). Cites WCAG criteria when relevant. Suggests concrete fixes (e.g. add aria-label, use <button> not div).

Example outputs:

  • "CRITICAL: Form at Login.jsx:12 has no associated labels - add htmlFor/id or aria-label"
  • "Focus trap: modal in Modal.js does not return focus on close"
  • "Contrast: #999 on #fff fails WCAG AA for body text - use #767676 or darker"

Principles

  • Accessibility is usability for more people; treat it as a requirement for web apps
  • Prefer semantic HTML over ARIA when possible; use ARIA to enhance, not replace
  • Run only when web application is detected (same activation check as Cosmo)
  • A11y phase: run after Cosmo in TDD loop for web apps
  • Flag blocking issues; suggest quick wins (e.g. alt text, button type)

Activation Check

BEFORE doing any review, check if this is a web application:

Use the same indicators as Cosmo (e.g. package.json frameworks, *.html, components/, tailwind/vite config). If no web indicators found, output:

ARIA SKIP: No web application detected. Accessibility review not applicable.

Stop here.

Read the full file on GitHub · 129 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. 3d ago First seen · 129 lines · 4 tokens per session scan A edeb765b87bf

Subscribe to this mod's changes

accessibility-reviewer is an agent published in the GitHub repository sam-agents/sam (18 stars, last pushed 1mo ago), licensed MIT. It adds 4 tokens to every session and 1,127 once invoked, about $0.0000 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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