I ran quite early into the same issues with my rust pet projects. Single structs with tons of Option<T> and validation methods etc. enums for type fields combined with says optional fields in the same layer so accessor methods all return Option<T>.

I add now a long list of instructions how to work with the type system and some do’s and don’ts. I don’t see myself as a vibe coder. I actually read the damn code and instruct the ai to get to my level of taste.