Valibot

This skill helps Claude work with Valibot, the modular schema validation library that's a lighter alternative to Zod. The key thing to know is that Valibot's API is fundamentally different from Zod despite solving the same problem. Where Zod chains methods, Valibot uses pipelines and function composition. The skill includes a detailed comparison table and common mistake examples, which is smart because mixing up the two syntaxes is easy to do. Use this when you need schema validation and want the type safety without Zod's bundle size, or when you're migrating existing validation code. The pipeline approach takes a minute to internalize but feels natural once you get it.