There's no evidence that "here's a thing, rewrite it in Rust" is the technique Scott used here.
"here's a test suite, write code in rust that makes that suite pass" is reasonably supported by the article. That would likely not be a derivative work.
If we assume an u licensed or MIT licensed test suite, an LLM could develop from that and documentation and you’d get something you could license MIT.
IMO, IANAL, etc.
And we’ll ignore the question of what the fact the LLM has certainly seen the git code during training means.
But the test suite would have to stay under the original license. And if you use a GPL test suite as they kernel to develop a program from can you license it non-GPL? I’d question that personally. Same acronyms above apply.
It's actually murkier than I suggest here. https://github.com/gitbutlerapp/grit/blob/main/AGENTS.md#sou...