Evaluating Skills
Evaluates and creates agent skills following best practices. Use when reviewing, writing, or refactoring skills, or asking about skill structure, format, or specification.
Install
$ agentstack add skill-altertable-ai-skills-evaluating-skills ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-altertable-ai-skills-evaluating-skills) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Evaluating & Creating Skills
Quick Start
- Validating: Run
skills validatefor structural checks - Scoring: Run
python scripts/score-skills.pyfor spec-grounded LLM evaluation
When to Use This Skill
- User wants to create a new skill
- User asks to review or evaluate an existing skill
- User needs help with skill format or structure
- User asks about skill best practices
- User wants to refactor or improve a skill
- Keywords: "skill", "SKILL.md", "create skill", "evaluate skill", "skill quality"
Authoritative References
The scorer grounds evaluation against these live documents (with vendored snapshot fallback):
- Specification - Field constraints, structure rules
- Best Practices - Quality criteria
- Evaluating Skills - Evaluation methodology
Skill Anatomy
skill-name/ # Gerund form (verb-ing)
├── SKILL.md # Main documentation ( --validate_onlyFull Scoring (with spec grounding)
uv run python scripts/score-skills.py Batch All Skills
uv run python scripts/score-skills.py . --scan_allCommon Pitfalls
- First-person descriptions - Use "Analyzes..." not "I analyze..."
- Missing trigger keywords - Agents can't find the skill
- Too long SKILL.md - Move details to references/ and add trigger context (e.g. "Read when working with X")
- Nested reference folders - Only one level allowed
- Abstract examples - Use concrete, real scenarios
- Noun-form names - Use "analyzing-data" not "data-analyzer"
- No Quick Start - Users abandon without immediate value
- Inconsistent terminology - Pick terms and stick with them
- Missing pitfalls section - Helps users avoid mistakes
- Time-sensitive content - Skills should be evergreen
References
- [skill-checklist.md](references/skill-checklist.md) - Read when scoring or reviewing a skill to get the full rubric breakdown, anti-patterns, and evaluation template
- [examples.md](references/examples.md) - Read when creating a new skill or refactoring an existing one to see concrete patterns from well-designed skills
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: altertable-ai
- Source: altertable-ai/skills
- License: MIT
- Homepage: https://altertable.ai
Install and usage instructions live in the source repository linked above.
Reviews
No reviews yet, be the first.
Write a review
Versions
- v0.1.0 Imported from the upstream source.