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Markdown Scanner · community-access | DecimalAI

documentationby community-access

Markdown Scanner

community-access/markdown-scanner

Source community-access/accessibility-agents ↗License MIT

Internal helper agent. Invoked by orchestrator agents via Task tool. Internal helper for scanning a single markdown file for accessibility issues across all 9 domains. Returns structured findings with severity, line numbers, suggested fixes, and auto-fix classification. Invoked by markdown-a11y-assistant via the Task tool - not user-invokable directly.

SkillScore82Maintained

On-demandOn-demand: invoked explicitly — never occupies your agent's context until called.

Doc Ops pack

Last verified 8/23/2026

What it changes

Passed 16 of 20 test cases with the skill, and 5 of 20 without it.

Without skill27%

With skill82%

Checks it passed that the model alone missed

The response declines to audit CSS stylesheets.
The command executes npx with markdownlint-cli2.
The command redirects stderr to stdout using 2>&1.

and 15 more in the full report

12 fixed6 passed either way4 still failing0 broke

Pass-rate lift: +55 pp
Tokens: +197%
Agent turns: 0%
Response time: -38%

Model gemini-3.6-flashMeasured 8/23/2026v2 · latest is v318 of 22 cases passed with skill · 20 comparable

Tokens, turns and time describe resource use, not a dollar price.

This benchmark measured an earlier version of the skill.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/community-access-markdown-scanner/SKILL.md https://app.decimal.ai/s/community-access-markdown-scanner/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add community-access-markdown-scanner, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/community-access-markdown-scanner/ and pins it in .decimal/skills.lock

decimalai skills add community-access-markdown-scanner

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/community-access-markdown-scanner/SKILL.md https://app.decimal.ai/s/community-access-markdown-scanner/SKILL.md

Raw file: /s/community-access-markdown-scanner/SKILL.md ↗ · machine-readable summary at /s/community-access-markdown-scanner.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 12 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 12

Prompt

When invoked on `docs/overview.md` (which yields 2 issues and a score of 85/100, Grade B), what specific announcement messages must be emitted at scan start and completion?

What was checked, without and with the skill
Checked	Without skill	With skill
The start message announces scanning across 9 accessibility domains.	Missed	Passed
The completion message includes file score and letter grade.	Passed	Passed

case-19 · gemini-3.6-flash · 8/23/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md164 lines5 files

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.

Domain 2: Image Alt Text (WCAG 1.1.1)

Scan for all ![text](url) patterns.

Flag:

Empty alt: ![](...)
Filename as alt: ![img_1234.jpg](...)
Generic alt: ![image](...), ![screenshot](...), ![photo](...)
Alt that is just punctuation or a single character

Auto-fix: No - always flag and suggest, require human approval.

Domain 3: Heading Hierarchy (WCAG 1.3.1 / 2.4.6)

Parse all #-prefixed headings. Build the heading tree and validate:

Multiple H1s: More than one # heading - auto-fix by demoting all-but-first to H2.
Skipped levels: H1 followed by H3, etc. - auto-fix by interpolating the missing level.
No H1: Flag for review (may be intentional fragment).
Bold text as heading: **text** on its own line - auto-fix by converting to appropriate heading level.
Non-descriptive heading text: ## Section 1, ## Details - flag for review.

Domain 7: Em-Dash and En-Dash Normalization (Cognitive)

Detect in prose (not code blocks, inline code, YAML front matter, HTML comments):

— (U+2014 em-dash)
– (U+2013 en-dash)
-- or -- in prose

Track record

Benchmark

16 / 20

test cases passed, vs 5 / 20 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 10/1/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

community-access / accessibility-agents

codex-skills/markdown-scanner/SKILL.md

View on GitHub ↗

License MITImported 10/1/2026Version v3Bundled 4 files

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

community-access/markdown-fixerInternal helper agent. Invoked by orchestrator agents via Task tool. Internal helper for applying accessibility fixes to markdown files. Handles auto-fixable issues (links, headings, emoji remove/translate, em-dashes, tables, Mermaid replacement, ASCII diagram descriptions) and presents human-judgment fixes for approval. Invoked by markdown-a11y-assistant via the Task tool - not user-invokable directly.Close match+50 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Markdown Scanner

Domain 2: Image Alt Text (WCAG 1.1.1)

Domain 3: Heading Hierarchy (WCAG 1.3.1 / 2.4.6)

Domain 7: Em-Dash and En-Dash Normalization (Cognitive)

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills