The frick is a PR abstraction? Is this a GitHub PR abstraction where the commits are squashed and the PR description is whatever was hallucinated at 5 am? Yes, that’s certainly an abstraction, aka loss of information.
You either have the information stored in the version control database or you don’t. You can curate and digest information but once it’s lost it’s lost.
People layering stuff on top of Git or Subversion makes no sense. Your AI is not so dainty and weak that it cannot write a commit message. And if it can’t then you can recuperate the information that you trashed.