This case shows how Open Source will die. With anyone just being able to pipe existing code and tests through an LLM and claiming that to be "clean room" (which is hogwash) no licensing can protect your work from being accumulated and monetized by anyone. The commons are actively being shredded in front of our eyes.

https://github.com/chardet/chardet/pull/322

chardet 7.0: ground-up MIT-licensed rewrite by dan-blanchard · Pull Request #322 · chardet/chardet

Summary This PR is for a ground-up, MIT-licensed rewrite of chardet. It maintains API compatibility with chardet 5.x and 6.x, but with 27x improvements to detection speed, and highly accurate suppo...

GitHub

@tante But this is how open source itself got started -- RMS implementing GNU Emacs incorporating large chunks of Gosling Emacs's code (against terms of its license), later rewriting but preserving the interfaces, and writing gcc having access to the source of lcc, and very likely pcc. (Yes, Gosling rewrote RMS's earlier work.)

"Clean room" has never been a requirement of copyright law. It's a defensive tactic going above and beyond legal requirements to fend off particularly vicious litigants.