[hu3]

You kinda can share function signatures with TypeScript's import type.

And that's what tRPC does but adds some generics in the middle to make things seamless.

Explanation here: https://colinhacks.com/essays/painless-typesafety

[ricardobeat]

You could argue that this is actually adding a lot of (nicely knit) seams.

[colinmcd]

I think that's a good characterization!