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 s2005/markdown-linter-fixer-skill --skill markdown-linter-fixergit clone --depth 1 https://github.com/s2005/markdown-linter-fixer-skillWrote 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/s2005/markdown-linter-fixer-skill/markdown-linter-fixer)<a href="https://agentmods.dev/skills/s2005/markdown-linter-fixer-skill/markdown-linter-fixer"><img src="https://agentmods.dev/badge/skills/s2005/markdown-linter-fixer-skill/markdown-linter-fixer/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/s2005/markdown-linter-fixer-skill/markdown-linter-fixer"><img src="https://agentmods.dev/badge/skills/s2005/markdown-linter-fixer-skill/markdown-linter-fixer.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 | $0.00060 | $0.02237 |
| Opus 5 | $0.00030 | $0.01118 |
| Sonnet 5 | $0.00012 | $0.00447 |
| Haiku 4.5 | $0.00006 | $0.00224 |
Grade A, and why
markdown-linter-fixer 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 9d 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 — 298 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Markdown Linter Fixer
Contents
- Overview
- When to Use This Skill
- Workflow Process
- Quick Reference Checklist
- Key Principles
- Common Scenarios
- Resources
Overview
Systematically fix linting issues in *.md files using markdownlint-cli2 through a structured workflow that diagnoses, fixes automatically where possible, and guides manual fixes when needed.
When to Use This Skill
Use this skill when:
- Fixing markdown linting errors in projects
- Standardizing markdown formatting across multiple files
- Addressing ordered list numbering issues (MD029)
- Preparing markdown documentation for quality standards
- Setting up markdown linting for the first time in a project
Workflow Process
Phase 1: Environment Setup & Prerequisites
Verify markdownlint-cli2 Installation
Check if markdownlint-cli2 is installed:
markdownlint-cli2 --version
If missing, install it globally via npm:
npm install -g markdownlint-cli2
Handle any permission or installation errors by suggesting:
- Local installation:
npm install --save-dev markdownlint-cli2 - Using npx:
npx markdownlint-cli2 - User-specific npm directory configuration
Configuration File Check
Look for existing markdown configuration files in the project root:
.markdownlint-cli2.jsonc.markdownlint.json.markdownlint.yaml.markdownlint.yml.markdownlintrc
If none exist, create .markdownlint-cli2.jsonc with:
What ships with it
3 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.
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.
- 9d ago First seen · 298 lines · 60 tokens per session scan A 5dab4ab057ce
markdown-linter-fixer is a skill published in the GitHub repository s2005/markdown-linter-fixer-skill (10 stars, last pushed 5mo ago), licensed MIT. It adds 60 tokens to every session and 2,237 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 2026-08-31.
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