[tlrobinson]

> But 3 files that require updating where the code won't compile until you've added all three is way way less of a problem.

I think this is only really possible in a relatively small subset of programming languages, even among those with static typing. At a minimum it seems like it would require a type system that didn't allow optional properties (by default) and did distinguish between nullable and non-nullable types.

Unless I'm missing something. Would love to see some examples of this done right. Or at least examples of languages you've done this in.

[macrael]

Optional types can get you for sure. I've been doing this with typescript and it's been alright. Prisma -> my domain model -> ApolloServer