[_tqr3]

The TypeScript compiler is only needed during development, the compiled JavaScript code contains no TypeScript-specific logic. Zod’s validation is entirely JavaScript-based, relying on simple checks (e.g., typeof, regexes, comparisons).

Also, the 2kb bundle just for the zod/v4-mini package, the full zod/v4 package is quite large.

[hdjrudni]

5.36kB is not "quite large". It's pretty reasonable, esp. if you're only running it on the server.