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License Checker
ASecurity--- name: license-checker description: Check and validate licenses of project dependencies for legal compliance ---
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- Added February 10, 2026
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[](https://www.skillsdirectory.com/skills/lovedragonball-license-checker)# ⚖️ 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
```bash
# 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
```markdown
## 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
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