I threw together a vibecoded tool to do this, as a personal experiment. It splits the guide into several runs, each focusing on a different style guide section. Here's the diff it gave for the Claude-authored README for the tool, which I called 'edit4style': https://gist.github.com/stevelandeydescript/14a75df1e02b5379...
I don't plan to release the code, since I don't really want my docs to be written in this voice. But it doesn't feel entirely unhelpful, as long as I'm personally curating the changes.