> Right now, the settled law is that such an LLM reproduction is 100% legal.

How so? Interfaces are not copyrightable, but that it not the same as dissecting a js bundle and copying the implementations. Are we sure these LLM are keeping sanitary habits there?

if you've used any Ai in your own code authoring, copyrights may be completely out the window

several courts have ruled Ai output is not copyrightable, I am unaware of any co-authored cases

That doesn't top people producing copies though, just trying to copyright the copies.

it also means that you cannot claim copyright against copiers, the context here being the original has had Ai involvement in the development process