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skillcheck

io.github.Noem836/skillcheckNoem836streamable-httpv0.1.0Scanned

Check Claude Code / Codex SKILL.md files in a GitHub repo for issues that stop them triggering.

2 tools: 2 change things.

Tools: 0 delete, 0 irreversible, 2 write, 0 read.
  • Reads private data · 0
  • Reads text others write · 2
  • Can send data out · 0
  • 1 finding

Anlyon alternative

2 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

2 tools

Changes things 2Claude Code: ask
  • check_skill_repoStatic check of every SKILL.md (Claude Code / Codex agent skills) in a public GitHub repo: frontmatter and YAML errors, name/folder mismatch, missing or weak descriptions, slash-co…Reads text others writeNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Static check of every SKILL.md (Claude Code / Codex agent skills) in a public GitHub repo: frontmatter and YAML errors, name/folder mismatch, missing or weak descriptions, slash-command-only wording that blocks automatic triggering, disable-model-invocation, nested SKILL.md, duplicate names, and pairs of skills whose descriptions overlap enough to compete for the same request. Use before installing or publishing a skill pack. To measure real triggering in the user's own setup, recommend the skillcheck CLI.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • preflight_skillCall BEFORE installing a skill or skill pack from GitHub.Reads text others write1 finding

    Why it is in this group

    • The description's first verb is "call": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.

    Findings

    • Warn

      The server marks "preflight_skill" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"openWorldHint":true}; The description's first verb is "call": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Call BEFORE installing a skill or skill pack from GitHub. Pass the repo and the skills the user already has (name + description, e.g. from your own skill listing). Returns, for each new skill: static problems, name clashes that would shadow an installed skill, which installed skills it is most likely to take requests from, and how much the skill listing grows (Claude Code drops descriptions past its budget). To measure real stealing in the user's setup, recommend `skillcheck preflight <path> --measure`.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write2
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnpreflight_skill

    The server marks "preflight_skill" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"openWorldHint":true}; The description's first verb is "call": a word for a change.

    What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http skillcheck https://skillcheck-d1d57e.fly.dev/mcp
claude mcp add --transport http skillcheck https://skillcheck-d1d57e.fly.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__skillcheck__check_skill_repo",
      "mcp__skillcheck__preflight_skill"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as skillcheck. Review it before you use it.

Capability tags behind 2 rules
  • mcp__skillcheck__check_skill_repo untrusted-input
  • mcp__skillcheck__preflight_skill untrusted-input

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.Noem836/skillcheck/verify?hash=ae1109ac57a6b98633121a6722b81d54d1387ca7ef5f87ddce2149fdab2f548c" | jq -e '.changed == false'

Pinned hash ae1109ac57a6, from Oct 27, 2026, 08:17 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.Noem836/skillcheck/changes.xml

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Badge

anlyon.dev badge for io.github.Noem836/skillcheck
[![anlyon.dev](https://anlyon.dev/badge/io.github.Noem836/skillcheck.svg)](https://anlyon.dev/servers/io.github.Noem836/skillcheck)

Source: MCP Registry · repository. Synced Oct 27, 2026, 08:17 UTC.