I dunno about autonomous, but it is happening at least a bit from human pilots. I've got a fork of a popular DevOps tool that I doubt the maintainers would want to upstream, so I'm not making a PR. I wouldn't have bothered before, but I believe LLMs can help me manage a deluge of rebases onto upstream.

same, i run quite a few forked services on my homelab. it's nice to be able to add weird niche features that only i would want. so far, LLMs have been easily able to manage the merge conflicts and issues that can arise.