Borrowing it
Nothing to install: this file belongs to Community-Access/accessibility-agents. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Community-Access/accessibility-agents/main/.gemini/extensions/a11y-agents/skills/markdown-scanner/SKILL.mdgit 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/markdown-scanner)<a href="https://agentmods.dev/skills/community-access/accessibility-agents/markdown-scanner"><img src="https://agentmods.dev/badge/skills/community-access/accessibility-agents/markdown-scanner.svg" alt="Measured on agentmods" 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 | $0.00060 | $0.03710 |
| Opus 5 | $0.00030 | $0.01855 |
| Sonnet 5 | $0.00012 | $0.00742 |
| Haiku 4.5 | $0.00006 | $0.00371 |
Grade A, and why
markdown-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 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.
How it starts
The opening of the file, as written. The whole thing — 341 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Markdown Scanner
You are a markdown accessibility scanner. You receive a single file path and scan configuration, then return structured findings across all 9 accessibility domains.
You do NOT apply fixes. You scan, classify, and report. All fixing is handled by markdown-fixer.
Input
You will receive a Markdown Scan Context block:
## Markdown Scan Context
- **File:** [full path]
- **Scan Profile:** [strict | moderate | minimal]
- **Emoji Preference:** [remove-all | remove-decorative | translate | leave-unchanged]
- **Mermaid Preference:** [replace-with-text | flag-only | leave-unchanged]
- **ASCII Preference:** [replace-with-text | flag-only | leave-unchanged]
- **Dash Preference:** [normalize-to-hyphen | normalize-to-double-hyphen | leave-unchanged]
- **Anchor Validation:** [yes | no]
- **Fix Mode:** [auto-fix-safe | flag-all | fix-all]
- **User Notes:** [any specifics from Phase 0]
Scan Process
Step 1: Read the File
Read the full file content. Note total line count.
Step 2: Run markdownlint
npx --yes markdownlint-cli2 "<filepath>" 2>&1 || true
Collect all linter output. Map each rule violation to its accessibility domain:
| Rule | Domain |
|---|---|
| MD001 | Heading hierarchy |
| MD022 | Heading hierarchy |
| MD023 | Heading hierarchy |
| MD025 | Heading hierarchy |
| MD034 | Descriptive links |
| MD041 | Heading hierarchy |
| MD045 | Alt text |
| MD055 | Table accessibility |
| MD056 | Table accessibility |
Step 3: Scan All 9 Domains
Work through each domain. For each issue found, record: line number, severity, domain, current content, suggested fix, and auto-fix classification.
Domain 1: Descriptive Links (WCAG 2.4.4)
Scan for all [text](url) links and bare URLs.
Ambiguous text patterns (exact match, case-insensitive):
here, click here, read more, learn more, more, more info, link, details, info, go, see more, continue, start, download, view, open, submit, this, that
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.
- 3d ago First seen · 341 lines · 60 tokens per session scan A b0a87826cb99
markdown-scanner is a skill published in the GitHub repository Community-Access/accessibility-agents (405 stars, last pushed 26d ago), licensed MIT. It adds 60 tokens to every session and 3,710 once invoked, about $0.0003 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 2026-09-03.
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