Evaluates agent skills against Anthropic's best practices. Use when asked to review, evaluate, assess, or audit a skill for quality. Analyzes SKILL.md structure, naming conventions, description quality, content organization, and identifies anti-patterns. Produces actionable improvement recommendations.
npxskills add vuralserhat86/antigravity-agentic-skills--skill skill_evaluatorLoading…
Evaluates skills against Anthropic's official best practices for agent skill authoring. Produces structured evaluation reports with scores and actionable recommendations.
scripts/validate_skill.py <skill-path>Run the validation script first:
scripts/validate_skill.py <path/to/skill>
This checks:
Evaluate each dimension and assign a score (1-5):
| Score | Criteria |
|---|---|
| 5 | Gerund form (-ing), clear purpose, memorable |
| 4 | Descriptive, follows conventions |
| 3 | Acceptable but could be clearer |
| 2 | Vague or misleading |
| 1 | Violates naming rules |
Rules: Max 64 chars, lowercase + numbers + hyphens only, no reserved words (anthropic, claude), no XML tags.
Good: processing-pdfs, analyzing-spreadsheets, building-dashboards
Bad: pdf, my-skill, ClaudeHelper, anthropic-tools
| Score | Criteria |
|---|---|
| 5 | Clear functionality + specific activation triggers + third person |
| 4 | Good description with some triggers |
| 3 | Adequate but missing triggers or vague |
| 2 | Too brief or unclear purpose |
| 1 | Missing or unhelpful |
Must include: What the skill does AND when to use it. Good: "Extracts text from PDFs. Use when working with PDF documents for text extraction, form parsing, or content analysis." Bad: "A skill for PDFs." or "Helps with documents."
| Score | Criteria |
|---|---|
| 5 | Concise, assumes Claude intelligence, actionable instructions |
| 4 | Generally good, minor verbosity |
| 3 | Some unnecessary explanations or redundancy |
| 2 | Overly verbose or confusing |
| 1 | Bloated, explains obvious concepts |
Ask: "Does Claude really need this explanation?" Remove anything Claude already knows.
| Score | Criteria |
|---|---|
| 5 | Excellent progressive disclosure, clear navigation, optimal length |
| 4 | Good organization, appropriate file splits |
| 3 | Acceptable but could be better organized |
| 2 | Poor organization, missing references, or bloated SKILL.md |
| 1 | No structure, everything dumped in SKILL.md |
Check:
| Score | Criteria |
|---|---|
| 5 | Perfect match: high freedom for flexible tasks, low for fragile operations |
| 4 | Generally appropriate freedom levels |
| 3 | Acceptable but could be better calibrated |
| 2 | Mismatched: too rigid or too loose |
| 1 | Completely wrong freedom level for the task type |
Guideline:
Deduct points for each anti-pattern found:
Use this template:
# Skill Evaluation Report: [skill-name]
## Summary
- **Overall Score**: X.X/5.0
- **Recommendation**: [Ready for publication / Needs minor improvements / Needs major revision]
## Dimension Scores
| Dimension | Score | Weight | Weighted |
|-----------|-------|--------|----------|
| Naming | X/5 | 10% | X.XX |
| Description | X/5 | 20% | X.XX |
| Content Quality | X/5 | 30% | X.XX |
| Structure | X/5 | 25% | X.XX |
| Degrees of Freedom | X/5 | 10% | X.XX |
| Anti-Patterns | X/5 | 5% | X.XX |
| **Total** | | 100% | **X.XX** |
## Strengths
- [List 2-3 things done well]
## Areas for Improvement
- [List specific issues with actionable fixes]
## Anti-Patterns Found
- [List any anti-patterns detected]
## Recommendations
1. [Priority 1 fix]
2. [Priority 2 fix]
3. [Priority 3 fix]
## Pre-Publication Checklist
- [ ] Description is specific with activation triggers
- [ ] SKILL.md under 500 lines
- [ ] One-level-deep file references
- [ ] Forward slashes in all paths
- [ ] No time-sensitive information
- [ ] Consistent terminology
- [ ] Concrete examples provided
- [ ] Scripts handle errors explicitly
- [ ] All configuration values justified
- [ ] Required packages listed
- [ ] Tested with Haiku, Sonnet, Opus
| Score Range | Rating | Action |
|---|---|---|
| 4.5 - 5.0 | Excellent | Ready for publication |
| 4.0 - 4.4 | Good | Minor improvements recommended |
| 3.0 - 3.9 | Acceptable | Several improvements needed |
| 2.0 - 2.9 | Needs Work | Major revision required |
| 1.0 - 1.9 | Poor | Fundamental redesign needed |
Skill Evaluator v1.1 - Enhanced
Kaynak: Google Engineering Practices - Code Review & Anthropic System Prompts
scripts/, references/) standarta uyuyor mu?name, description) eksiksiz ve valid mi?scripts/ içindeki Python/Bash kodları güvenli ve çalışır durumda mı?references/ dosyaları gerçekten gerekli mi? Yoksa SKILL.md içine mi gömülmeli?| Aşama | Doğrulama |
|---|---|
| 1 | Skill adı ve açıklaması birbiriyle tutarlı mı? |
| 2 | Anti-pattern (örn: Hardcoded path) tespit edildi mi? |
| 3 | Puanlama rubriğine göre objektif bir skor (1-5) verildi mi? |
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in (single or multi-account), or reading/injecting/running secrets via op.
CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in (single or multi-account), or reading/injecting/running secrets via op.
CLI to manage emails via IMAP/SMTP. Use `himalaya` to list, read, write, reply, forward, search, and organize emails from the terminal. Supports multiple accounts and message composition with MML (MIME Meta Language).