We are free to fork if need arises.

...and how do you ensure your fork does not contain a single commit involving even a single line written by Claude? If you can't, then isn't your fork slop by default?

And most of Claude was made on stolen code.

Sure, it learned to code by reading lots of code, most of it just publicly available online for anyone to read and for anyone to learn from but not explicitly licensed for a machine to read it and learn from it. I doubt it's possible to teach an ML system (or for that matter a human being) how to code without reading lots of example code. And any code you've ever read has an impact on any code you write afterward (same as any other creative endeavor), that's why clean room design as a defense against copyright infringement is a thing that exists.