Using a TS validation library like Zod gives you both the shared validation code for both the frontend and backend, the TS types, as well as the json schema for

Using a TS validation library like Zod gives you both the shared validation code for both the frontend and backend, the TS types, as well as the json schema for openapi. It's a triple whammy too good to ignore. Especially as a small team it is huge leverage enabling you to go further faster.