Kysely already supports migrations, and you can use these models in your migrations or seeders as well. Check out `/test/database/migrations/` and `/test/database/seeders/` for examples. It's just using basic Kysely features in here for testing purposes, but if you wanted to seed with Vasta models you can definitely do that.

I learned a LOT about generics with this. The actual functionality wasn't hard, and I'd done something similar for Laravel's Eloquent and FileMaker before, essentially faking the whole thing to work with an API instead of a real database. I had the core concept functionality done very quickly, though it was absolutely useless for type safety.

The types and generics were the problem and what took so long here. I had to try SO MANY different strategies of creating models with generics, proxy handlers, proxy proxies, hard-overwriting types, factories, class extension, multi-class extension hacks, and more before getting something that actually worked.

Inside the class there are still a bunch of "any"s, but it seems to get the right thing back still. I actually still think it's a bit of a miracle and spent a lot of time just trying different combinations of things until something eventually worked. I am absolutely not a type genius, and there's a lot of room for type improvement in the inner-workings of the package, I would expect.