validate-skills
callstackincubator/agent-skills
How to install validate-skills
npx skills add https://github.com/callstackincubator/agent-skills --skill validate-skillsFull instructions (SKILL.md)
Source of truth, from callstackincubator/agent-skills.
name: validate-skills description: Validates skills in this repo against agentskills.io spec and Claude Code best practices. Use via /validate-skills command. license: MIT metadata: author: Callstack tags: validation, linting, skill-authoring
Validate Skills
Validate all skills in skills/ against the agentskills.io spec and Claude Code best practices.
Validation Checklist
For each skill directory, verify:
Spec Compliance (agentskills.io)
| Check | Rule |
|---|---|
name format | 1-64 chars, lowercase alphanumeric + hyphens, no leading/trailing/consecutive hyphens |
name matches directory | Directory name must equal name field |
description length | 1-1024 characters, non-empty |
| Optional fields valid | license, metadata, compatibility if present |
Best Practices (Claude Code)
| Check | Rule |
|---|---|
| Description format | Third person, describes what + when to use |
| Body length | Under 500 lines |
| References one-level deep | No nested reference chains |
| Links are markdown | Use [text](path) not bare filenames |
| No redundancy | Don't repeat description in body |
| Concise | Only add context Claude doesn't already have |
How to Run
-
Find all skill directories:
fd -t d -d 1 . skills/ -
For each skill, read
SKILL.mdand check against the rules above -
Report issues in this format:
## Validation Results ### skills/example-skill - [PASS] name format valid - [FAIL] name "example" doesn't match directory "example-skill" - [PASS] description length OK (156 chars)
References
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