I'd be interested if the author could elaborate on use-cases for this. It seems like a nice bit of automation, but for a problem that I don't think I've ever had.

I've worked on a relatively big startup codebase with a lot of common patterns, but directory management wasn't a problem that we had. I've also worked in the Google monolith, and while there are a lot of defined practices, in my experience this isn't quite the tool we'd need to manage them (things like ownership matter more).