License library / Copyleft software
GNU General Public License v3.0
Run, study, change and share the software, including commercially. If you convey it or a work based on it, you must do so under the GPL with the corresponding source.
SPDX GPL-3.0-only Version 3.0 Official text
Uses at a glance
| commercial use | Permitted |
|---|---|
| production deployment | Permitted |
| modification / derivatives | Permitted |
| redistribution | Permitted |
| sublicensing | Prohibited |
| AI model training | Needs human review |
| inference-time use (RAG, prompts, generation) | Permitted |
Why some uses need review
AI model training. The license grants broad rights but attaches conditions (such as keeping notices) to copies and adaptations. Whether a trained model, or its output, is a copy or adaptation that carries those conditions is legally unsettled, and in some places training may fall under an exception such as fair use. A human reviewer should confirm this use for your case.
Duties
- give attribution / keep the notice
- license notice
- state changes
- release distributed derivatives under the same license
- provide source code with distributed derivatives
Notes
- Sublicensing is not allowed; every recipient receives a license from the original licensors (sections 2 and 10).
- Running the software, including as a network service, does not by itself trigger the duty to share source; conveying copies does.
Resources under this license
No resource in the registry is published under this license yet.
For agents
curl -s https://www.rightshold.com/v1/licenses/check -H 'content-type: application/json' \
-d '{"license":"GPL-3.0-only","intended_use":{"commercial_use":true,"deployment":true}}'Reading version 2026-10-09 by the Rightshold rights desk; reference hash b7c249ef72154728916c75e08f893bb7d118a22db56f20a4ae46003c0f6169df identifies this license version. The license text governs; this is not legal advice.