Use this guide for developers who need to go beyond Valibot's built-in primitives — for example when validating a domain-specific format, wrapping a schema in a reusable envelope, or building a library on top of Valibot. Because every schema and action is just a plain object satisfying a shared interface, custom schemas and actions are first-class citizens — not second-class extensions.
Form handling with Formisch, the type-safe form library for modern frameworks. Use when the user needs to create forms, handle form state, validate form inputs, or work with Formisch.
Use this guide when library authors who want to build on top of Valibot — whether that is a form library, an ORM, an API framework, a code generator, or other tooling. It covers Standard Schema for schema-agnostic integrations, schema introspection for extracting types and runtime properties, and schema tree traversal for analysis and code generation.
Use this guide when library authors and advanced users want to understand how Valibot works under the hood. It covers the internal object model — schemas, actions, datasets, issues, and config — and how they fit together in the pipeline execution engine.
Schema validation with Valibot, the modular and type-safe schema library. Use when the user needs to validate data, create schemas, parse inputs, or work with Valibot in their project. Also use when migrating from Zod to Valibot.