@mikebroberts Zod's a solid choice! The transform stuff can be tricky at first but becomes second nature.

Let me know if you end up trying Optique—always curious to hear feedback.

@hongminhee I'm using transforms in a couple of places for very basic things (e.g. JSON from string). The problem I had was that when errors are possible the error handling in a transform is much less clean - to me - than if you're just writing “normal" TS, because of the context requirement. So for now I'm using just a TS function when going from known type to known type.