While I agree that nixpkgs would profit from LLM instructions, I personally think your skill is too much at once. Why is it not an AGENTS.md for example? I propose we start with such a file and only add hand written text. Let’s not generate these files and keep them short and reviewable themselves.
Maybe we could collect LLM generated PRs, where the author seems to care and has also responded to feedback. Those would be good candidates for improving our AGENTS.md with minimal instructions that have a verified impact.