Skill License
skill-license
info
experience: governance
spec: frontmatter
A skill should declare a license.
A skill should declare a license so consumers know the terms under which they can reuse and redistribute it.
Rule definition
The full Spotlight rule — drop it into a ruleset (.spotlight.yaml / .spectral.yaml) and run it with any Spotlight tool.
skill-license:
title: Skill License
reference: https://spotlight-rules.com/spec/rules/agent-skill/skill-license/
description: A skill should declare a license so consumers know the terms under
which they can reuse and redistribute it.
message: A skill should declare a license.
severity: info
given: $.frontmatter
then:
field: license
function: truthy
tags:
- format:agent-skill
- spec:frontmatter
- experience:governance
prompt: "You are editing an Agent Skill document to satisfy the Spotlight API
governance rule 'skill-license' (Skill License). Requirement: A skill should
declare a license so consumers know the terms under which they can reuse and
redistribute it. To fix: Ensure `license` is present and non-empty at each
matching location. This rule is evaluated at the JSONPath `$.frontmatter` —
inspect every location it matches and correct only what violates the rule.
Make the smallest change that satisfies the rule, leave all unrelated
content, key order, comments, and formatting unchanged, and keep the
document valid Agent Skill. Return only the complete corrected document,
with no commentary."
AI fix prompt — send this to Claude, Gemini, or ChatGPT with your artifact to auto-fix this rule
You are editing an Agent Skill document to satisfy the Spotlight API governance rule 'skill-license' (Skill License). Requirement: A skill should declare a license so consumers know the terms under which they can reuse and redistribute it. To fix: Ensure `license` is present and non-empty at each matching location. This rule is evaluated at the JSONPath `$.frontmatter` — inspect every location it matches and correct only what violates the rule. Make the smallest change that satisfies the rule, leave all unrelated content, key order, comments, and formatting unchanged, and keep the document valid Agent Skill. Return only the complete corrected document, with no commentary.| Artifact | Agent Skill |
|---|---|
| Applies at (given) | $.frontmatter |
| Severity | info — educational by default; raise to warn/error to enforce |
| Reference | https://spotlight-rules.com/spec/rules/agent-skill/skill-license/ |