[NitpickLawyer]

> at a certain point though, one wonders if you can trust people to accurately report how much is written by an LLM.

That's an interesting thought. I think there are ways to automate this, and some IDEs / tools track this already. I've seen posts by both Google and Amz providing percentages of "accepted" completions in their codebases, and that's probably something they track across codebases automatically.

Also on topic, here's aider's "self written code" statistics: https://aider.chat/HISTORY.html

But yeah I agree that "written by" doesn't necessarily imply "autonomously", and for the moment it's likely heavily curated by a human. And that's still ok, IMO.