open-source-licensing

Use when selecting, using, or distributing open-source software and understanding license obligations. Covers permissive vs copyleft licenses, license compatibility, compliance obligations, and SCA tools for license auditing. USE FOR: open-source licenses, MIT, Apache, GPL, LGPL, MPL, BSD, copyleft, permissive, license compatibility, OSS compliance, SBOM license auditing, contributor license agreements, dual licensing DO NOT USE FOR: IP ownership questions (use intellectual-property), creating custom licenses (consult legal counsel), software patent analysis (use intellectual-property)

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Repositorio: Tyler-R-Kendrick/agent-skills
Última actividad en el origen: 11 de febrero de 2026 a las 05:14
Idioma detectado de SKILL.md: inglés
Estrellas: 10
Forks: 4

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name	open-source-licensing
description	Use when selecting, using, or distributing open-source software and understanding license obligations. Covers permissive vs copyleft licenses, license compatibility, compliance obligations, and SCA tools for license auditing. USE FOR: open-source licenses, MIT, Apache, GPL, LGPL, MPL, BSD, copyleft, permissive, license compatibility, OSS compliance, SBOM license auditing, contributor license agreements, dual licensing DO NOT USE FOR: IP ownership questions (use intellectual-property), creating custom licenses (consult legal counsel), software patent analysis (use intellectual-property)
license	MIT
metadata	{"displayName":"Open-Source Licensing","author":"Tyler-R-Kendrick"}
compatibility	claude, copilot, cursor
references	[{"title":"Open Source Initiative (OSI) — License List","url":"https://opensource.org/licenses"},{"title":"Choose an Open Source License","url":"https://choosealicense.com"},{"title":"SPDX License List","url":"https://spdx.org/licenses/"}]

Open-Source Licensing

Disclaimer: This skill provides general educational information about legal topics relevant to software development. It is . Laws vary by jurisdiction and change frequently. Always consult a qualified attorney licensed in the relevant jurisdiction before making legal decisions for your organization.

License

Permissions

Conditions

Limitations

Key Risk

MIT

Commercial use, modification, distribution, private use

Include copyright notice and license text

No liability, no warranty

Very low -- one of the most permissive licenses

Apache 2.0

Commercial use, modification, distribution, patent use, private use

Include copyright notice, license text, state changes, include NOTICE file

No liability, no warranty, no trademark use

Low -- includes explicit patent grant, which is an advantage

BSD 2-Clause

Commercial use, modification, distribution, private use

Include copyright notice and license text

No liability, no warranty

Very low -- similar to MIT

GPL 2.0

Commercial use, modification, distribution, private use

Disclose source, include license, same license for derivative works

No liability, no warranty

High -- derivative works must be GPL 2.0, no patent grant

GPL 3.0

Commercial use, modification, distribution, patent use, private use

Disclose source, include license, same license for derivative works, no tivoization

No liability, no warranty

High -- derivative works must be GPL 3.0, includes anti-tivoization and patent provisions

LGPL 2.1

Commercial use, modification, distribution, private use

Disclose source of library modifications, include license, allow relinking

No liability, no warranty

Medium -- modifications to the library must be LGPL, but linking from proprietary code is permitted

LGPL 3.0

Commercial use, modification, distribution, patent use, private use

Disclose source of library modifications, include license, allow relinking

No liability, no warranty

Medium -- similar to LGPL 2.1 with GPL 3.0 base terms

MPL 2.0

Commercial use, modification, distribution, patent use, private use

Disclose source of modified files, include license

No liability, no warranty, no trademark use

Medium -- file-level copyleft; only modified files must remain MPL

AGPL 3.0

Commercial use, modification, distribution, patent use, private use

Disclose source (including over network), include license, same license

No liability, no warranty

Very high -- network use triggers source disclosure; affects SaaS products

BSL (Business Source License)

Non-production use; converts to open-source after change date

Cannot use in production without commercial license until change date

Production use restricted

High -- not a true open-source license; restricts commercial use until a specified date

Category	Obligations	Examples
Permissive	Minimal: attribution, include license text, no warranty disclaimer	MIT, Apache 2.0, BSD 2-Clause, BSD 3-Clause, ISC
Weak Copyleft	Modifications to the library must be shared under the same license, but you can link from proprietary code	LGPL 2.1, LGPL 3.0, MPL 2.0, EPL 2.0
Strong Copyleft	Derivative works must use the same license -- this is the "viral" effect	GPL 2.0, GPL 3.0, AGPL 3.0
Network Copyleft	Copyleft is triggered even by network use (providing the software as a service) without traditional distribution	AGPL 3.0

Distribution Method	Obligation	Examples
SaaS (no distribution)	Fewer obligations -- most licenses are not triggered because no binary or source is distributed. Exception: AGPL requires source disclosure even for network use.	Web applications, API services, hosted platforms
Binary distribution	Must fulfill all license terms including attribution, license inclusion, and source disclosure (for copyleft).	Desktop applications, mobile apps, embedded firmware
Source distribution	Include license notices and copyright headers in all distributed source files. Maintain LICENSE and NOTICE files.	Libraries, SDKs, open-source projects, npm/PyPI packages
Container images	Binary distribution rules apply. Container images are considered binaries containing all bundled dependencies.	Docker images, OCI images published to registries

Tool	What It Does
FOSSA	Automated license compliance and vulnerability scanning across multiple languages and package managers. Generates SBOM and license reports.
Snyk	Identifies open-source license risks alongside security vulnerabilities. Supports policy-based license filtering.
Black Duck (Synopsys)	Enterprise-grade SCA tool for license compliance, vulnerability management, and code audit for M&A due diligence.
Licensee	Ruby-based tool that identifies the license of a project by examining LICENSE files. Used by GitHub for license detection.
license-checker (npm)	Scans npm dependencies and reports the license for each package. Supports allow/deny lists for CI enforcement.
pip-licenses (Python)	Lists licenses of installed Python packages. Supports output in CSV, JSON, and Markdown for integration into compliance workflows.
go-licenses	Scans Go module dependencies and reports licenses. Can check for disallowed licenses and export license notices.

open-source-licensing

Opciones de instalación

Revisa los archivos de origen

Open-Source Licensing

Open-Source Licensing

Overview

License Categories

Common Licenses Quick Reference

License Compatibility Matrix

Compliance Obligations by Distribution Type

License Auditing Tools

Contributor License Agreements (CLA)

Dual Licensing

Best Practices

open-source-licensing

Datos de origen

Opciones de instalación

Revisa los archivos de origen

Más de este repositorio

Más de este repositorio

Open-Source Licensing

Open-Source Licensing

Overview

License Categories

Common Licenses Quick Reference

License Compatibility Matrix

Compliance Obligations by Distribution Type

License Auditing Tools

Contributor License Agreements (CLA)

Dual Licensing

Best Practices