I've found libraries like Zod useful when interacting with external data sources like a database. Slonik[1] uses Zod to define the types expected from a SQL que

I've found libraries like Zod useful when interacting with external data sources like a database. Slonik[1] uses Zod to define the types expected from a SQL query and then performs runtime validation on the data to ensure that the query is yielding the expected type. I don't think it's necessary to use Zod/runtime validation everywhere, but it's a nice tool to have on hand. [1]https://github.com/gajus/slonik https://github.com/gajus/slonik