A static accessibility checker for a StyleSeed component or page that identifies issues and fixes them. Accessibility means making an interface usable by people with disabilities, including users of screen readers or keyboard controls.

Use it to review StyleSeed components or pages for accessibility and apply fixes. It checks items including text and control contrast, semantic markup, and text alternatives.

It catches common WCAG 2.2 AA problems in code, such as poor color contrast or missing text alternatives, without requiring a live screen-reader test.

ss-a11y — Skill for Claude Code by bitjaru

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.

Any agent

npx skills add bitjaru/styleseed --skill ss-a11y

Clone the repo

git clone --depth 1 https://github.com/bitjaru/styleseed

Made for: Claude Code.

Or install styleseed, the plugin that ships this one along with the rest of its 24 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/bitjaru/styleseed/ss-a11y.svg)](https://agentmods.dev/skills/bitjaru/styleseed/ss-a11y)

Your own site

<a href="https://agentmods.dev/skills/bitjaru/styleseed/ss-a11y"><img src="https://agentmods.dev/badge/skills/bitjaru/styleseed/ss-a11y.svg" alt="Measured on agentmods" height="20"></a>

Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 907 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.

Model	Per session	Once invoked
Fable 5.1	$0.00016	$0.00907
Opus 5	$0.00008	$0.00453
Sonnet 5	$0.00003	$0.00181
Haiku 4.5	$0.00002	$0.00091

Measured 7d ago against content hash 866c41a61b6b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

ss-a11y 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.

engine/.claude/skills/ss-a11y/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Accessibility Audit

Registry-first artifact boundary

When .styleseed/project.json and .styleseed/artifacts/index.json exist, resolve the requested artifact ID first, then read only .styleseed/bundles/<artifact-id>.md and .styleseed/manifests/<artifact-id>.json. Never fall back to the global legacy bundle for a registry project. Legacy projects may use .styleseed/effective-rules.md only when no registry exists.

When NOT to use

For general design system compliance review → use /ss-review
For Nielsen UX heuristics → use /ss-audit
For non-StyleSeed code (no data-slot, no semantic tokens) — assumes StyleSeed conventions
For runtime testing — this is a static code audit, not a screen-reader simulation

Target: $ARGUMENTS

Audit Criteria

WCAG 2.2 AA Compliance

1. Perceivable

Color contrast: Text must meet 4.5:1 (normal) or 3:1 (large/bold text)
- Check text-muted-foreground (#717182) on bg-background (#FFFFFF) = 4.6:1 (passes)
- Check text-brand on white (verify contrast with your skin's brand color)
- Flag any custom colors that don't meet ratio
Non-text contrast: UI controls/graphics must meet 3:1
Text alternatives: All <img> need alt, icons need aria-label when meaningful
Color independence: Don't convey info by color alone (add icons/text)

2. Operable

Touch targets: Minimum 44x44px (min-h-11 min-w-11)
- Common violation: h-9 (36px) buttons — should be h-11
- Icon buttons need explicit size: w-11 h-11
Keyboard navigation: All interactive elements must be keyboard-accessible
- Tab order should be logical
- focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2

Motion: Animations must respect prefers-reduced-motion

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

3. Understandable

Labels: Form inputs must have visible labels or aria-label
Error messages: Form errors must be programmatically associated (aria-describedby)
Language: <html lang="en"> (or appropriate language code for your project)

Read the full file on GitHub · 78 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.

7d ago First seen · 78 lines · 16 tokens per session scan A 866c41a61b6b

Subscribe to this mod's changes

ss-a11y is a skill published in the GitHub repository bitjaru/styleseed (944 stars, last pushed 3d ago), licensed MIT. It adds 16 tokens to every session and 907 once invoked, about $0.0001 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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