type-safe-form-validation

Validate forms and API data with Zod schemas and inferred TypeScript types.

2|3|Updated Oct 21, 2025

Search Tags:#typescript #validation #zod #forms #api-validation #runtime-checks

Ready to run

npx skills add https://github.com/vishalsachdev/claude-skills --skill type-safe-form-validation

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: type-safe-form-validation
Source: https://github.com/vishalsachdev/claude-skills/tree/main/type-safe-form-validation
Command: npx skills add https://github.com/vishalsachdev/claude-skills --skill type-safe-form-validation

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

A comprehensive pattern for building type-safe forms and API validation using Zod, with automatic error formatting, runtime type checks, and TypeScript integration for end-to-end form validation.

Core Features & Use Cases

Single Source of Truth: One schema for all validation needs.
Type Inference: TS types inferred from Zod schemas.
Runtime Validation: Validate on client and server.
User-Friendly Errors: Formatted error messages for UIs.
Composable Schemas: Build complex validations from simpler parts.
API Integration: Validate both requests and responses.

Quick Start

Define your Zod schemas in lib/validation.ts, generate TS types, and use a helper to format errors for display in the UI.

Frequently Asked Questions about type-safe-form-validation

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

FAQPage Schema

How do I validate forms with TypeScript types at runtime?▼

Runtime form validation with TypeScript uses Zod to define schemas that generate compile-time types and validate data at runtime. Define a Zod schema, infer its TypeScript type, and validate form submissions on both client and server to catch errors before they reach your database or API.

Can I use the same validation schema for client-side and API requests?▼

Yes. A single Zod schema serves as your source of truth for client-side form validation, server-side form handling, and API request/response validation. This eliminates duplicate validation logic and keeps types synchronized across your application.

How do I format validation errors for display in a form UI?▼

Zod validation errors can be transformed into user-friendly messages using helper functions that map errors to form fields. The schema-driven approach ensures consistent error formatting across all forms without manual error handling in each component.

What's the benefit of composable schemas for complex validations?▼

Composable Zod schemas let you build reusable validation pieces and combine them into larger schemas without repeating logic. This approach scales validation across multiple forms and API endpoints while maintaining a single, maintainable source of truth.

Do I need to write separate validation logic for API responses?▼

No. The same Zod schema validates both API requests and responses, ensuring end-to-end type safety. This prevents runtime surprises from unexpected response shapes and keeps your API contract tightly coupled to your type definitions.