This is one of the things I've seen it be very useful for: putting together one-off tools or visualizations. I'm not going to maintain these, although I might check them into version control for historical reference.

I recently ran across a package in my team's codebase that has a bunch of interrelated DB tables, and we didn't already have a nice doc explaining how everything fits together - so I asked the AI to make me a detailed README.md for the package. I'm currently reviewing that, removing a bunch of nonsense I didn't ask for, and I'm going to run it by my team. It's actually pretty good to start with because the code and DB models are well documented, just piecemeal all over the place, and half of what the AI is doing is just collating all that info and putting it in one doc.