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zod-validation-expert

authentic

Expert in Zod — TypeScript-first schema validation. Covers parsing, custom errors, refinements, type inference, and integration with React Hook Form, Next.js, and tRPC.

When to use

• Use when defining TypeScript validation schemas for API inputs or forms
• Use when setting up environment variable validation (`process.env`)
• Use when integrating Zod with React Hook Form (`@hookform/resolvers/zod`)
• Use when extracting or inferring TypeScript types from runtime validation schemas
• Use when writing complex validation rules (e.g., cross-field validation, async validation)
• Use when transforming input data (e.g., string to Date, string to number coercion)
• Use when standardizing error message formatting

When not to use

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

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