skill-check SKILL.md skillA
skill-check from olgasafonova/skillcheck-free is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add olgasafonova/skillcheck-free/skill-check@v3.33.0Pins v3.33.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- olgasafonova/skillcheck-free
- Path
skills/skill-check/SKILL.md- Versions recorded
- 10
- Latest version
- v3.33.0, committed Oct 11, 2026
- First version recorded
- Jun 21, 2026
- Size
- 21,429 bytes
- Repository stars
- 42
- License
- MIT
Validate Claude Code skills against Anthropic guidelines. Use when user says "check skill", "skillcheck", "validate SKILL.md", or asks to find issues in skill definitions. Covers structural and semantic validation. Do NOT use for anti-slop detection, security scanning, token analysis, enterprise checks, or Eval Kit generation; use skill-check-pro for those. Do NOT use for LinkedIn skill engagement; use skillcheck-engage for that.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# SkillCheck (Free) Check skills against Anthropic guidelines and the agentskills specification. This file contains Free tier validation rules. **Want deeper analysis?** [Upgrade to Pro](https://getskillcheck.com) for anti-slop detection, security scanning, token optimization, WCAG compliance, enterprise checks, and Eval Kit (auto-generated test prompts for your skills). ## Prerequisites - Any AI assistant with file Read capability (Claude Code, Cursor, Windsurf, Codex CLI) - Works on any platform (Unix/macOS/Windows) - No special tools required (Read-only; the Invisible Unicode checks also use Grep, which stays read-only) - No environment variables or API keys required; the checks run fully offline ## Interface - **Input**: path(s) to SKILL.md files, plus any `references/*.md` files in the same skill folder - **Output**: a validation report listing each issue with check ID, severity (Critical / Warning / Suggestion), line number, and fix; strengths reported in a separate list - **Modes**: runs standalone on a single skill or over a directory of skills, one report per skill ## Workflow …
Read the whole file at its exact version.
How to install
mdr add olgasafonova/skillcheck-free/skill-check@sha256:6aeaf7f3364ed683The line at the top of this page pins the label v3.33.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_dpo5lhtu2wyfbefu)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 10 versions of this file, between Jun 21, 2026 and Oct 11, 2026, about one every 12 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v3.33.0 latest | 2026-10-11 | b30de49 | 21,429 B | A | view · diff |
| v3.33.0 | 2026-10-09 | a9b91d5 | 21,427 B | A | view · diff |
| v3.33.0 | 2026-10-09 | 76a355e | 21,352 B | A | view · diff |
| v3.32.1 | 2026-09-19 | 63a6280 | 18,691 B | A | view · diff |
| v3.32.0 | 2026-09-19 | faf503d | 18,697 B | A | view · diff |
| v3.32.0 | 2026-08-31 | 0f24e6c | 18,648 B | A | view · diff |
| v3.28.0 | 2026-08-27 | d472da8 | 16,191 B | A | view · diff |
| v3.28.0 | 2026-08-03 | 05d3385 | 14,864 B | A | view · diff |
| v3.28.0 | 2026-07-30 | 525fe01 | 15,096 B | A | view · diff |
| v3.20.1 | 2026-06-21 | 9400b70 | 15,096 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (21429 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
olgasafonova/skillcheck-free · 42 stars · license MIT · pushed 2026-10-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dpo5lhtu2wyfbefu GET https://markdownregistry.com/api/v1/resolve?ref=olgasafonova/skillcheck-free/skill-check GET https://markdownregistry.com/api/v1/blob/6aeaf7f3364ed6831db2206eb2e4e9c84ef14061db609c84fcf17f93b3bf4bc3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from olgasafonova/skillcheck-free
Every file in olgasafonova/skillcheck-free