What you can do, no questions asked
- Use it — run any component for yourself, your team, or your business, on your own machines.
- Modify it — fork, patch, extend, and rebuild; wire it into your own systems.
- Share it — pass copies on, free of charge, for non-commercial purposes.
What needs an agreement
Offering the software to others as a paid product or service. If you want to sell it, host it for customers, or build a commercial offering on top of it, that requires a separate agreement — get in touch through GitHub.
That's the whole trade: self-hosting stays wide open, and turning the same substrate into someone else's paid platform becomes a conversation instead of a surprise.
The MIT history
Everything published before this change was MIT-licensed, and a granted license is
irrevocable: those released versions remain MIT. The Sustainable Use
License applies from each component's next release onward. Each repository's
LICENSE file states this explicitly.
Why fair-code and not open source
The Sustainable Use License is not an OSI-approved open-source license, and we don't call it one. The ecosystem's bet is that the substrate is the product and you run it yourself — that use stays free. What the license closes is the one lane MIT left open: a third party packaging the same substrate as a hosted commercial service with no relationship to the project. The reasoning, including what would make us reverse it, is recorded in the public journey log.
The license text
The authoritative text lives in each repository's LICENSE file — for
example
soulstream's.
It is the Sustainable Use
License, version 1.0, unchanged.