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.
npx skills add Community-Access/accessibility-agents --skill kb-github-a11y-scannergit clone --depth 1 https://github.com/Community-Access/accessibility-agentsWrote 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/community-access/accessibility-agents/kb-github-a11y-scanner)<a href="https://agentmods.dev/skills/community-access/accessibility-agents/kb-github-a11y-scanner"><img src="https://agentmods.dev/badge/skills/community-access/accessibility-agents/kb-github-a11y-scanner/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/community-access/accessibility-agents/kb-github-a11y-scanner"><img src="https://agentmods.dev/badge/skills/community-access/accessibility-agents/kb-github-a11y-scanner.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 | $0.00045 | $0.02246 |
| Opus 5.5 | $0.00018 | $0.00898 |
| Sonnet 5.5 | $0.00009 | $0.00449 |
| Haiku 4.5 | $0.00005 | $0.00225 |
Grade A, and why
kb-github-a11y-scanner 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 28d 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 — 237 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Accessibility Scanner Integration
What Is the GitHub Accessibility Scanner?
The GitHub Accessibility Scanner (github/accessibility-scanner@v2) is an official GitHub Action that:
- Scans live URLs for accessibility barriers using axe-core in a headless browser
- Creates trackable GitHub Issues for each finding, with affected element, WCAG criterion, and remediation guidance
- Optionally assigns issues to GitHub Copilot for AI-powered fix suggestions and PR creation
- Caches results across runs for delta detection (new, fixed, persistent findings)
- Supports authenticated scanning (login flows, SSO, passkeys via Playwright auth context)
- Optionally captures screenshots and attaches them to filed issues
Current version: v2 (public preview)
Detecting Scanner Presence
To determine whether a repository has the GitHub Accessibility Scanner configured:
Workflow File Detection
Search for workflow files referencing the scanner action:
# Search in .github/workflows/ for the scanner action reference
grep -rl "github/accessibility-scanner" .github/workflows/
Pattern to match in YAML:
- uses: github/accessibility-scanner@v2
Workflow Inputs
When a scanner workflow is found, extract its configuration:
| Input | Required | Description |
|---|---|---|
urls |
Yes | Newline-delimited list of URLs to scan |
repository |
Yes | Repository (owner/name) where issues and PRs are created |
token |
Yes | Fine-grained PAT with write access (contents, issues, PRs, metadata) |
cache_key |
Yes | Filename for caching results across runs (e.g., cached_results-mysite.json) |
login_url |
No | Login page URL for authenticated scanning |
username |
No | Username for authentication |
password |
No | Password for authentication (via repository secret) |
auth_context |
No | Stringified JSON for complex authentication (Playwright session state) |
skip_copilot_assignment |
No | Set true to skip assigning issues to Copilot |
include_screenshots |
No | Set true to capture screenshots (stored on gh-cache branch) |
What ships with it
1 file 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.
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.
- 28d ago First seen · 237 lines · 45 tokens per session scan A 1b3f8cd2ec33
kb-github-a11y-scanner is a skill published in the GitHub repository Community-Access/accessibility-agents (428 stars, last pushed 27d ago), licensed MIT. It adds 45 tokens to every session and 2,246 once invoked, about $0.0002 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 2026-09-23.
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