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 lyupro/skillforge-mcp --skill markdown-lintergit clone --depth 1 https://github.com/lyupro/skillforge-mcpWrote 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/lyupro/skillforge-mcp/markdown-linter)<a href="https://agentmods.dev/skills/lyupro/skillforge-mcp/markdown-linter"><img src="https://agentmods.dev/badge/skills/lyupro/skillforge-mcp/markdown-linter/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/lyupro/skillforge-mcp/markdown-linter"><img src="https://agentmods.dev/badge/skills/lyupro/skillforge-mcp/markdown-linter.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 | $0.00023 | $0.00362 |
| Opus 5.5 | $0.00009 | $0.00145 |
| Sonnet 5.5 | $0.00005 | $0.00072 |
| Haiku 4.5 | $0.00002 | $0.00036 |
Grade A, and why
markdown-linter 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.
What it actually says
This is a script-strategy skill. The script in scripts/main.py reads the Markdown file path from SKILLFORGE_INPUT, runs a built-in linter against it (no third-party dependencies — only the Python standard library), and prints findings to stdout, one per line.
Output format (one finding per line):
<line_number>:<column>:<severity>:<rule>:<message>
Severities: error, warning, info. Rules:
heading-order— H2 follows H1, H3 follows H2, no skipped levels.trailing-whitespace— lines ending in space or tab.tab-indent— tabs used for indent (Markdown prefers spaces).missing-alt—with empty alt text.bare-url— http(s) URL not wrapped in<...>or[text](url).mixed-list-marker— list switches between-,*,+inside the same block.
When the file does not exist or SKILLFORGE_INPUT is empty, the script prints 0:0:error:io:no input file and exits 0.
Prerequisites:
config.security.allowScripts: true.python3on the host's resolvedPATH.SKILLFORGE_INPUTset to the absolute path of the.mdfile to lint.
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.
- 1mo ago First seen · 36 lines · 23 tokens per session scan A b380a8d22de5
markdown-linter is a skill published in the GitHub repository lyupro/skillforge-mcp (2 stars, last pushed 2mo ago), licensed MIT. It adds 23 tokens to every session and 362 once invoked, about $0.0001 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 2026-08-31.
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