Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/onfire7777/universal-ai-skills-librarynpx agentmods add skills/onfire7777/universal-ai-skills-library/accessibility-testingWrote 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.
[](https://agentmods.dev/skills/onfire7777/universal-ai-skills-library/accessibility-testing)<a href="https://agentmods.dev/skills/onfire7777/universal-ai-skills-library/accessibility-testing"><img src="https://agentmods.dev/badge/skills/onfire7777/universal-ai-skills-library/accessibility-testing/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.
<a href="https://agentmods.dev/skills/onfire7777/universal-ai-skills-library/accessibility-testing"><img src="https://agentmods.dev/badge/skills/onfire7777/universal-ai-skills-library/accessibility-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00151 | $0.03809 |
| Opus 5.5 | $0.00060 | $0.01524 |
| Sonnet 5.5 | $0.00030 | $0.00762 |
| Haiku 4.5 | $0.00015 | $0.00381 |
Grade A, and why
accessibility-testing 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 494 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Accessibility Testing
Overview
Accessibility testing ensures your application is usable by people with disabilities, including those who rely on screen readers, keyboard navigation, voice control, and other assistive technologies. Automated tools can catch 30-50% of WCAG violations; the rest requires manual testing and judgment.
WCAG Compliance Levels
| Level | Meaning | Examples | Target |
|---|---|---|---|
| A | Minimum | Alt text on images, keyboard accessible, no seizure-inducing content | Bare minimum for all sites |
| AA | Standard | Color contrast 4.5:1, resize to 200%, visible focus indicators | Most common target (legal requirement in many jurisdictions) |
| AAA | Enhanced | Contrast 7:1, sign language for media, no timing limits | Aspirational — rarely required in full |
WCAG 2.2 Key Updates (over 2.1)
- 2.4.11 Focus Not Obscured (Minimum) — Focus indicator not fully hidden by other content.
- 2.4.13 Focus Appearance — Visible focus indicator meets minimum size/contrast.
- 2.5.7 Dragging Movements — Drag operations have non-dragging alternatives.
- 2.5.8 Target Size (Minimum) — Touch targets at least 24x24 CSS pixels.
- 3.3.7 Redundant Entry — Don't ask users to re-enter previously provided info.
- 3.3.8 Accessible Authentication (Minimum) — No cognitive function test for login.
Common Violations (Caught by Automation)
| Violation | WCAG Criterion | Impact |
|---|---|---|
| Missing alt text on images | 1.1.1 Non-text Content | Critical — screen readers skip images |
| Insufficient color contrast | 1.4.3 Contrast (Minimum) | Serious — affects low vision users |
| Missing form labels | 1.3.1 Info and Relationships | Critical — form fields unidentifiable |
| Missing document language | 3.1.1 Language of Page | Moderate — screen readers use wrong pronunciation |
| Empty links / buttons | 4.1.2 Name, Role, Value | Critical — controls have no accessible name |
| Missing skip navigation link | 2.4.1 Bypass Blocks | Moderate — keyboard users cannot skip repeated content |
| Duplicate element IDs | 4.1.1 Parsing | Moderate — ARIA references break |
| Missing heading structure | 1.3.1 Info and Relationships | Serious — navigation by headings fails |
What ships with it
23 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- AGENTS.md 15 KB
- metadata.json 930 B
- README.md 791 B
- rules/_sections.md 4.1 KB
- rules/_template.md 380 B
- rules/accessibility-testing-combine-automated-testing-axe-core-in-playwright-with.md 358 B
- rules/accessibility-testing-configure-a.md 281 B
- rules/accessibility-testing-enable-addon-a11y-for-all-stories-by-default.md 343 B
- rules/accessibility-testing-fail-the-build-on-critical-violations-missing-alt-text.md 392 B
- rules/accessibility-testing-generate-reports-as-ci-artifacts-for-audit-trails-and.md 354 B
- rules/accessibility-testing-include-people-with-disabilities-in-user-testing-when.md 338 B
- rules/accessibility-testing-run-automated-a11y-tests-on-every-pr.md 312 B
- rules/accessibility-testing-test-components-in-isolation-and-in-composed-layouts.md 364 B
- rules/accessibility-testing-test-pages-in-multiple-states-empty-loaded-error-modal.md 350 B
- rules/accessibility-testing-test-with-real-assistive-technology-at-least-once-per.md 375 B
- rules/accessibility-testing-treat-a11y-violations-like-bugs-not-warnings.md 327 B
- rules/accessibility-testing-use-actions-for-authenticated-pages-or-spas-that-need.md 367 B
- rules/accessibility-testing-use-axe-core-react-during-development-to-catch-issues.md 362 B
- rules/accessibility-testing-use-ignore-sparingly-and-document-why-each-rule-is-ignored.md 344 B
- rules/accessibility-testing-use-include-exclude-to-scope-checks-to-specific.md 354 B
- rules/accessibility-testing-use-the-storybook-test-runner-with-axe-playwright-for-ci.md 373 B
- rules/accessibility-testing-use-withtags-wcag2a-wcag2aa-wcag21aa-for.md 365 B
- rules/accessibility-testing-warn-on-moderate-violations-contrast-heading-order-to.md 391 B
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.
- 1mo ago First seen · 494 lines · 151 tokens per session scan A dc98f0f031ec
accessibility-testing is a skill published in the GitHub repository onfire7777/universal-ai-skills-library (16 stars, last pushed 1mo ago), licensed MIT. It adds 151 tokens to every session and 3,809 once invoked, about $0.0006 per session on Opus 5.5. 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.
Other skills, from other repositories
agent-browser
Use the host-side agent-browser CLI for local browser smoke tests, screenshots, snapshots, and simple UI validation against forwarded localhost URLs.
browser-qa
Testing web apps through a real browser: reconnaissance before acting, selector discovery, state capture, console errors and screenshot evidence. Use on a web surface end to end, or to reproduce a front-end bug.
hatch3r-browser-verify
Opt-in browser verification skill — spec-run-first Playwright verification (assertions execute in the runner, agent reads only failures), axe-core a11y audits, toHaveScreenshot() regression diffs, E2E test scaffolds, and snapshot-mode exploratory driving. Default ON for UI-affecting agent invocations; disable globally…
hatch3r-qa-path
Produces a human-run manual QA test path from a PR, branch diff, or uncommitted working tree — a risk-ordered table of steps, expected results, and automated-coverage references plus a shippability sign-off. Rows are auto-proven via delegated verification sub-agents before emission, so the human walks only what…
hatch3r-a11y-audit
Runs a WCAG AA accessibility audit with findings and fixes across 7 scan categories (keyboard, contrast, ARIA, reduced motion, screen reader, high contrast, automated axe). Use when auditing and remediating accessibility.
hatch3r-qa-validation
E2E validation workflow producing a structured pass/fail report with evidence. Use when running QA validation, acceptance testing, verifying releases, or working on QA E2E validation issues.