This is super cool!

Have you thought about making a tool to help preview/dry run migrations?

I feel that's something I would want a ton of confidence in if an LLM is making migration scripts.

Especially if it's doing scary stuff like breaking up a table.

How do you expect an LLM to help here? Can't you just use OverlayFS on the database volume, or a backup thereof, and run the migration against that?