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 keska-labs/enterprise-skills --skill skill-md-validationgit clone --depth 1 https://github.com/keska-labs/enterprise-skillsWrote 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/keska-labs/enterprise-skills/skill-md-validation)<a href="https://agentmods.dev/skills/keska-labs/enterprise-skills/skill-md-validation"><img src="https://agentmods.dev/badge/skills/keska-labs/enterprise-skills/skill-md-validation/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/keska-labs/enterprise-skills/skill-md-validation"><img src="https://agentmods.dev/badge/skills/keska-labs/enterprise-skills/skill-md-validation.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 | $0.00049 | $0.00754 |
| Opus 5 | $0.00024 | $0.00377 |
| Sonnet 5 | $0.00010 | $0.00151 |
| Haiku 4.5 | $0.00005 | $0.00075 |
Grade A, and why
skill-md-validation 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 11d 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 — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL.md validation (GitHub source)
Official spec reference: agentskills.io specification.
What counts as a skill package
In RepoService.listSkillsInRepo, a skill package is any directory under the resolved skills root that contains a blob path ending in SKILL.md (case-sensitive filename). All blobs under that directory are collected into skillFiles for sync.
What counts as a cursor-rule
Standalone blobs under the skills root with extensions .md, .mdc, .yaml, .yml that are not inside a skill-package directory become skillType: "cursor-rule".
Frontmatter parsing
parseSkillMdFrontmatter reads the first YAML block between --- lines. Supported subset:
- Top-level scalars:
name,description(simplekey: valuelines). - Nested
metadata:block with two-space-indented keys (string values only)—used forversionandcategorywhen present. - Optional
metadata.triggers:block with four-space-indented keys:languages,files,dependencies,extensions,keywords(comma-separated lists; scoped npm names may be quoted), andgeneralPurpose(true/false). Lists are lowercased when stored except file path tokens.
It does not load a full YAML parser; keep manifests within that subset or metadata may be ignored.
Manifest → SkillMeta
From fetchSkillManifests / standalone cursor-rule enrichment:
| Field | Source |
|---|---|
name |
Frontmatter name, else path-derived |
description |
Frontmatter description |
version |
metadata.version, else short SHA |
category |
metadata.category, else path-derived |
path |
Package directory path in repo |
skillType |
Always "skill" |
skillFiles |
All blob paths under the package dir |
triggers |
Parsed metadata.triggers when present |
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.
- 11d ago First seen · 59 lines · 49 tokens per session scan A 2357ecde7bb2
skill-md-validation is a skill published in the GitHub repository keska-labs/enterprise-skills (7 stars, last pushed 22d ago), licensed MIT. It adds 49 tokens to every session and 754 once invoked, about $0.0002 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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