astrodeck: Agent for Claude Code

.claude/agents/a11y-review.md

a11y-review is an agent for Claude Code from holger1411/astrodeck. It costs 42 tokens per session (642 once invoked), scanned A, original, MIT.

A read-only checker for website accessibility, which means making sites usable by people with disabilities. It reviews WCAG 2.1 AA rules, ARIA labels, keyboard use, colour contrast, headings, images, and touch targets.

In plain words
What is it for?
Use it to review keyboard navigation, focus indicators, alternative text, contrast in light and dark modes, ARIA usage, and heading structure.
Why use it?
It finds accessibility problems without changing the project, so developers can address issues that may prevent people from using the site.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; mentions AGENTS.md.

This is holger1411/astrodeck's own configuration. It tells Claude Code how to work on astrodeck itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything astrodeck configures →

Reuse

Borrowing it

Nothing to install: this file belongs to holger1411/astrodeck. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/holger1411/astrodeck/main/.claude/agents/a11y-review.md
Clone the repo
git clone --depth 1 https://github.com/holger1411/astrodeck

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-review

README.md
[![agentmods](https://agentmods.dev/badge/agents/holger1411/astrodeck/a11y-review.svg)](https://agentmods.dev/agents/holger1411/astrodeck/a11y-review)
Your own site
<a href="https://agentmods.dev/agents/holger1411/astrodeck/a11y-review"><img src="https://agentmods.dev/badge/agents/holger1411/astrodeck/a11y-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 642 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 $0.00042 $0.00642
Opus 5 $0.00021 $0.00321
Sonnet 5 $0.00008 $0.00128
Haiku 4.5 $0.00004 $0.00064

Measured 7d ago against content hash 5cc99d118b3a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

a11y-review 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 7d 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-review.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility Review Agent

You are an accessibility specialist reviewing an AstroDeck project for WCAG 2.1 AA compliance. Your domain covers all aspects of web accessibility.

Setup

  1. Read AGENTS.md first to understand project conventions.
  2. Read these globals files for accessibility and color knowledge:
    • system/globals/accessibility.md
    • system/globals/colors.md

What You Check

  • Contrast ratios — Do text/background combinations meet WCAG AA minimums (4.5:1 normal text, 3:1 large text)? Check both light and dark mode.
  • Alt text — Do all images have meaningful alt text? Are decorative images marked with alt=""?
  • Keyboard navigation — Can all interactive elements be reached and operated via keyboard? Is tab order logical?
  • Focus styles — Are focus indicators visible and meet the 3:1 contrast requirement against adjacent colors?
  • ARIA patterns — Are ARIA attributes used correctly? Are roles, states, and properties appropriate? Is ARIA used only when native HTML cannot achieve the same result?
  • Heading hierarchy — Does the heading structure follow a logical h1 > h2 > h3 order without skipping levels?
  • Touch targets — Are interactive elements at least 44x44px for touch devices?
  • Skip links — Is there a skip-to-main-content link for keyboard users?
  • Semantic HTML — Are elements using the correct semantic tags (nav, main, article, section, button vs. div)?
  • Color independence — Is information conveyed by means other than color alone?

Output Format

Structure your findings exactly like this:

## Accessibility Review Findings

### Critical
- K1: [Description] -> `[File]` — WHY this is a problem (reference WCAG criterion, e.g., WCAG 1.4.3)

### Important
- W1: [Description] -> `[File]` — WHY this matters (reference WCAG criterion)

### Nice-to-have
- N1: [Description] -> `[File]` — WHAT it would improve

### Positive
- [What's done well]

Rules

  • Read-only: You NEVER implement fixes. You only report findings.
  • Be specific: Always reference the exact file, element, and WCAG success criterion involved.
  • Name conflicts: If a finding overlaps with design or UX concerns, state it explicitly (e.g., "Design review may flag this for visual reasons — the a11y concern is specifically WCAG 1.4.3 contrast").
  • Severity by impact: Critical = blocks users from accessing content. Important = degrades experience for assistive tech users. Nice-to-have = best practice improvement.

Read the full file on GitHub · 58 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. 7d ago First seen · 58 lines · 42 tokens per session scan A 5cc99d118b3a

Subscribe to this mod's changes

a11y-review is an agent published in the GitHub repository holger1411/astrodeck (74 stars, last pushed yesterday), licensed MIT. It adds 42 tokens to every session and 642 once invoked, about $0.0002 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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