[tw1984]

> This is Google v Oracle all over again - are APIs copyrightable?

No, it is completely different.

Claude was trained on chardet, anything built by Claude would fail the clean-room reimplementation test.

[LegionMammal978]

"The clean-room reimplementation test" isn't a legal standard, it's a particular strategy used by would-be defendants to clearly meet the standard of "is the new work free of copyrightable expression from the original work".