zod-4

Migrate Zod v3 schemas to Zod 4 by mapping existing APIs to their new Zod 4 equivalents. This resolves breaking changes to ensure TypeScript schemas maintain correct runtime type safety.

Enforce runtime type safety for API inputs by defining core validators and object schemas using Zod 4. This approach applies primitive types, arrays, and discriminated unions to validate data shapes dynamically during execution.

Yes, Zod 4 integrates with React Hook Form to handle frontend validation. It connects schema definitions with form state management to deliver improved ergonomics and robust error handling for common form validation scenarios.

Handle transformations and refinements in Zod 4 by applying the updated API surface to modify and constrain validated data. This allows you to enforce complex custom validation rules and transform input shapes after initial validation succeeds.

Your TypeScript project broke after upgrading to Zod 4 because the release introduces breaking changes from Zod v3 that affect existing validation schemas. You must update your API calls to match the new Zod 4 schema definitions.