Valibot is really nice, particularly for avoiding bundle size bloat. Because Zod uses a "fluent builder" API, all of Zod's functionality is implemented in classes with many methods. Importing something like `z.string` also imports validators to check if the string is a UUID, email address, has a minimum or maximum length, matches a regex, and so on - even if none of those validators are used. Valibot makes these independent functions that are composed using the "pipe" function, which means that only the functions which are actually used need to be included in your JavaScript bundle. Since most apps use only a small percentage of the available validators, the bundle size reduction can be quite significant relative to Zod.