If I were the maintainer, and you specified up front that your PR was largely written by an LLM, I would appreciate it. I may prioritize it lower than other PRs, perhaps, but that's about it.
I think it's also important to disclose how rigorously you tested your changes, too. I would hate to spend my time looking at a change that was never even tested by a human.
It sounds like you do both of these. Judging by the other replies, it seems that other reviewers may take a harsher stance, given the heavily polarized nature of LLMs. Still, if you made the changes and you're up front about your methodology, why not? In the worst case, your PR gets closed and everybody moves on.
I think it's also important to disclose how rigorously you tested your changes, too. I would hate to spend my time looking at a change that was never even tested by a human.
It sounds like you do both of these. Judging by the other replies, it seems that other reviewers may take a harsher stance, given the heavily polarized nature of LLMs. Still, if you made the changes and you're up front about your methodology, why not? In the worst case, your PR gets closed and everybody moves on.