api-contracts-and-zod-validation

Generate Zod schemas and TypeScript types from TypeScript interfaces.

6|Updated Nov 11, 2025

Search Tags:#typescript #validation #zod #server-actions #api-contracts #runtime-validation #form-validation

Ready to run

npx skills add https://github.com/hopeoverture/worldbuilding-app-skills --skill api-contracts-and-zod-validation

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: api-contracts-and-zod-validation
Source: https://github.com/hopeoverture/worldbuilding-app-skills/tree/main/skills/development/api-contracts-and-zod-validation
Command: npx skills add https://github.com/hopeoverture/worldbuilding-app-skills --skill api-contracts-and-zod-validation

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill generates Zod schemas and TypeScript types for forms, API routes, and Server Actions, enabling runtime validation and strong type safety across client-server boundaries.

Core Features & Use Cases

Generate Zod schemas from TS types: ensures bidirectional type compatibility with TypeScript.
Form validation schemas: creates validation for React Hook Form, Formik, or native forms.
API Route and Server Action validation: adds runtime validation at API boundaries.
Schema generation script: automates TS <-> Zod schema generation for maintainability.

Quick Start

Define your TypeScript interfaces, then run the generation script: python scripts/generate_zod_schema.py --input types/entities.ts --output schemas/entities.ts

Frequently Asked Questions about api-contracts-and-zod-validation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I validate API requests and responses with runtime type checking in TypeScript?▼

Runtime validation with Zod schemas enforces type safety at API boundaries. Define Zod schemas from TypeScript types, then use z.parse() or z.safeParse() on incoming requests and outgoing responses to catch mismatches at runtime, not just compile time.

Can I generate Zod schemas automatically from existing TypeScript interfaces?▼

Yes. Use the schema generation script to automate conversion of TypeScript interfaces to Zod schemas, ensuring bidirectional type compatibility and reducing manual maintenance when types change.

How do I validate forms and Server Actions with Zod schemas?▼

Create Zod schemas for form inputs, then apply them in Server Actions and form handlers via z.parse() or z.safeParse(). This provides runtime validation before processing, with type inference flowing back to TypeScript for full IDE support.

What's the best way to keep TypeScript types and validation schemas in sync?▼

Generate Zod schemas from TypeScript source types using the included script. This eliminates manual duplication and ensures schemas and types stay aligned automatically as your interfaces evolve.

Does this approach work with nested objects, arrays, and optional fields?▼

Yes. Zod schemas support nested objects, arrays, unions, enums, and optional fields with full TypeScript inference, allowing complex API contracts and form structures to validate and type-check consistently.

Can JSDoc descriptions be preserved when generating Zod schemas?▼

Yes. The generation script preserves JSDoc comments from TypeScript interfaces, carrying documentation into Zod schemas so validation errors and IDE hints include your original descriptions.