Skill not invoked — Claude gives generic review

Say 'use SkillCheck-Free' explicitly.

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SkillCheck-Free

Name: SkillCheck-Free (Claude Skill)
Author: olgasafonova

por 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.

▶ Ver demo 📦 Instalar 💡 Casos de uso

Por qué usarlo

Características clave

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

Demo en vivo

Cómo se ve en la práctica

skillcheck-free-skill.replay ▶ listo

0/0

Instalación

Repositorio del autor · Documentación oficial de Skills de Claude

Casos de uso

Usos del mundo real: SkillCheck-Free

Validate your skill before publishing it to a catalog

👤 Skill authors ⏱ ~20 min beginner

Cuándo usarlo: Before opening a PR to awesome-claude-skills or anthropics/skills.

Flujo

Run SkillCheck on your SKILL.md

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

→ Per-rule findings with severities
Fix Critical issues

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

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

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

→ Progress toward zero Critical

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

Errores comunes

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

Combinar con: 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

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

Flujo

Decide what to keep

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

→ Prioritized uninstall candidates

Resultado: A leaner, higher-quality skill collection.

Combinaciones

Combínalo con otros MCPs para multiplicar por 10

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.✓ Copiado

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.✓ Copiado

Herramientas

Lo que expone este MCP

Herramienta	Entradas	Cuándo llamar
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

Coste y límites

Lo que cuesta ejecutarlo

Cuota de API: None
Tokens por llamada: Small — typical SKILL.md is <10k tokens
Monetario: Free tier only; Pro tier exists for deeper pattern validation
Consejo: Free tier is sufficient for most authoring — upgrade only if you publish commercially.

Seguridad

Permisos, secretos, alcance

Almacenamiento de credenciales: No credentials — pure prompts

Salida de datos: None — validation is local

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

Resolución de problemas

Errores comunes y soluciones

SKILL.md frontmatter wrong in target skill

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

Verificar: head <target>/SKILL.md

Wrong trigger keywords — SkillCheck runs but misses severity tier

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

Alternativas

SkillCheck-Free vs otros

Alternativa	Cuándo usarla	Contrapartida
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

Más

Recursos

📖 Lee el README oficial en GitHub

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