⚖️ License Checker Skill

---

name: license-checker description: Check and validate licenses of project dependencies for legal compliance

🎯 Purpose

ตรวจสอบ licenses ของ dependencies เพื่อความถูกต้องตามกฎหมายและนโยบายบริษัท

📋 When to Use

• Before releasing software
• Adding new dependencies
• Compliance audits
• Open source contributions
• Enterprise projects

🔧 License Types

Permissive (Safe for commercial)

License	Can	Cannot
MIT	Commercial use, modify, distribute	Liability
Apache 2.0	Commercial, patents, modify	Liability, trademark
BSD	Commercial, modify, distribute	Liability

Copyleft (Careful)

License	Risk
GPL	Must open source derivative works
LGPL	OK if dynamically linked
AGPL	Network use = distribution

Commercial

License	Description
Proprietary	Requires license purchase
Dual-licensed	Choose open or commercial

📝 Check Commands

# NPM - license-checker
npx license-checker --summary
npx license-checker --production --csv > licenses.csv

# NPM - license-report
npx license-report

# Python
pip-licenses --format=markdown

📊 Output Example

├─ package-a@1.0.0
│  ├─ licenses: MIT
│  ├─ repository: https://github.com/...
│  └─ publisher: Author Name
├─ package-b@2.0.0
│  ├─ licenses: Apache-2.0
│  ├─ repository: https://github.com/...
│  └─ publisher: Company Inc

🚨 License Policy Template

## Allowed Licenses
- MIT
- Apache-2.0
- BSD-2-Clause
- BSD-3-Clause
- ISC
- CC0-1.0

## Requires Review
- LGPL-3.0
- MPL-2.0

## Not Allowed
- GPL-3.0
- AGPL-3.0
- Unlicensed

✅ Compliance Checklist

• All deps have licenses
• No GPL in commercial
• Attribution included
• License files copied
• NOTICE file updated
• Legal approved

🔗 Related Skills

• security-audit - Security compliance
• dependency-management - Manage deps
• documentation - License docs