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SkillCheck-Free

Name: SkillCheck-Free MCP Server
Author: olgasafonova

von olgasafonova · olgasafonova/SkillCheck-Free

Validates Claude Code skills against the open agentskills spec — structure, body, naming, semantics, quality patterns — Critical / Warning / Suggestion.

olgasafonova/SkillCheck-Free is a spec-compliance linter for Agent Skills. Free tier covers: 1.x Structure (YAML frontmatter, name validity, description quality, XML injection), 2.x Body (length, hardcoded dates, empty sections, unqualified MCP refs), 3.x Naming (generic names, verb-noun), 4.x Semantic (conflicting instructions, vague terms, unspecified outputs), 8.x Quality patterns (examples, error handling, triggers), 19.x Design pattern classification, 22.x Knowledge density. Severity tiers: Critical / Warning / Suggestion / Strength.

▶ Demo ansehen 📦 Installieren 💡 Anwendungsfälle

Warum nutzen

Hauptfunktionen

Checks YAML frontmatter, name validity, XML-injection risks
Body audits — length, hardcoded dates, empty sections, unqualified MCP refs
Semantic checks for conflicting or vague instructions
Design-pattern classification (Reviewer / Generator / Inversion / Pipeline / Tool Wrapper)
Severity-tiered output — lets you triage Critical vs Suggestion

Live-Demo

In der Praxis

skillcheck-free-skill.replay ▶ bereit

0/0

Installieren

Wählen Sie Ihren Client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "skillcheck-free-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/olgasafonova/SkillCheck-Free",
        "~/.claude/skills/SkillCheck-Free"
      ],
      "_inferred": true
    }
  }
}

Öffne Claude Desktop → Settings → Developer → Edit Config. Nach dem Speichern neu starten.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "skillcheck-free-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/olgasafonova/SkillCheck-Free",
        "~/.claude/skills/SkillCheck-Free"
      ],
      "_inferred": true
    }
  }
}

Cursor nutzt das gleiche mcpServers-Schema wie Claude Desktop. Projektkonfiguration schlägt die globale.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "skillcheck-free-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/olgasafonova/SkillCheck-Free",
        "~/.claude/skills/SkillCheck-Free"
      ],
      "_inferred": true
    }
  }
}

Klicken Sie auf das MCP-Servers-Symbol in der Cline-Seitenleiste, dann "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "skillcheck-free-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/olgasafonova/SkillCheck-Free",
        "~/.claude/skills/SkillCheck-Free"
      ],
      "_inferred": true
    }
  }
}

Gleiche Struktur wie Claude Desktop. Windsurf neu starten zum Übernehmen.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "skillcheck-free-skill",
      "command": "git",
      "args": [
        "clone",
        "https://github.com/olgasafonova/SkillCheck-Free",
        "~/.claude/skills/SkillCheck-Free"
      ]
    }
  ]
}

Continue nutzt ein Array von Serverobjekten statt einer Map.

~/.config/zed/settings.json

{
  "context_servers": {
    "skillcheck-free-skill": {
      "command": {
        "path": "git",
        "args": [
          "clone",
          "https://github.com/olgasafonova/SkillCheck-Free",
          "~/.claude/skills/SkillCheck-Free"
        ]
      }
    }
  }
}

In context_servers hinzufügen. Zed lädt beim Speichern neu.

claude mcp add skillcheck-free-skill -- git clone https://github.com/olgasafonova/SkillCheck-Free ~/.claude/skills/SkillCheck-Free

Einzeiler. Prüfen mit claude mcp list. Entfernen mit claude mcp remove.

Anwendungsfälle

Praxisnahe Nutzung: SkillCheck-Free

Validate your skill before publishing it to a catalog

👤 Skill authors ⏱ ~20 min beginner

Wann einsetzen: Before opening a PR to awesome-claude-skills or anthropics/skills.

Voraussetzungen

Skill cloned — git clone https://github.com/olgasafonova/SkillCheck-Free ~/.claude/skills/SkillCheck-Free

Ablauf

Run SkillCheck on your SKILL.md

Use SkillCheck-Free — validate ~/my-skill/SKILL.md against the agentskills spec.✓ Kopiert

→ Per-rule findings with severities
Fix Critical issues

Walk me through each Critical finding and propose a fix.✓ Kopiert

→ Concrete edits, not 'improve clarity'
Re-run until clean

Re-validate. Anything still Critical or Warning?✓ Kopiert

→ Progress toward zero Critical

Ergebnis: A skill that won't be rejected for trivial spec violations.

Fallstricke

Chasing every Suggestion — Suggestions are aspirational; Critical + Warning is the bar for most catalogs

Kombinieren mit: skills-skill-8 · awesome-claude-skill-2

Audit every skill you've installed for quality concerns

👤 Skill hoarders who want to prune ⏱ ~30 min intermediate

Wann einsetzen: You installed 20 skills and aren't sure which ones are well-made.

Ablauf

Batch validate

SkillCheck-Free — run validation across every SKILL.md under ~/.claude/skills/. Rank by Critical count.✓ Kopiert

→ Per-skill report with priorities
Decide what to keep

Which skills have persistent Critical issues I should uninstall?✓ Kopiert

→ Prioritized uninstall candidates

Ergebnis: A leaner, higher-quality skill collection.

Kombinationen

Mit anderen MCPs für 10-fache Wirkung

skillcheck-free-skill + skills-skill-8

Cross-check: SkillCheck validates spec, huangwb8/auto-test-skill tests robustness

Run SkillCheck first for spec issues, then auto-test-skill for design weaknesses.✓ Kopiert

skillcheck-free-skill + awesome-claude-skill-2

Validate before submitting your skill to the catalog

SkillCheck my SKILL.md, then if clean, draft the awesome-claude-skills PR.✓ Kopiert

Werkzeuge

Was dieses MCP bereitstellt

Werkzeug	Eingaben	Wann aufrufen
validate_skill	path to SKILL.md	Pre-publish or post-install
classify_pattern	skill body	Understanding how a skill fits your collection
batch_validate	directory of skills	Fleet-wide audit

Kosten & Limits

Was der Betrieb kostet

API-Kontingent: None
Tokens pro Aufruf: Small — typical SKILL.md is <10k tokens
Kosten in €: Free tier only; Pro tier exists for deeper pattern validation
Tipp: Free tier is sufficient for most authoring — upgrade only if you publish commercially.

Sicherheit

Rechte, Secrets, Reichweite

Credential-Speicherung: No credentials — pure prompts

Datenabfluss: None — validation is local

Passing SkillCheck ≠ the skill is actually useful; it's a spec check, not a utility check.

Fehlerbehebung

Häufige Fehler und Lösungen

Skill not invoked — Claude gives generic review

Say 'use SkillCheck-Free' explicitly.

Prüfen: ls ~/.claude/skills/SkillCheck-Free/SKILL.md

SKILL.md frontmatter wrong in target skill

Expected — that's the finding SkillCheck exists to surface. Fix the frontmatter and re-run.

Prüfen: head <target>/SKILL.md

Wrong trigger keywords — SkillCheck runs but misses severity tier

Ask explicitly for 'severity-tiered output'; default may compress.

Alternativen

SkillCheck-Free vs. andere

Alternative	Wann stattdessen	Kompromiss
skills-skill-8 auto-test-skill	You want design robustness testing, not spec compliance	Complementary — run both
Manual review	You've written many skills and have internalized the spec	No machine backstop for subtle issues

Mehr

Ressourcen

📖 Offizielle README auf GitHub lesen

🐙 Offene Issues ansehen

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