Does it support the latest TypeScript features?

Yes, it is specifically optimized for TypeScript 5.7+, utilizing modern features like the 'satisfies' operator and 'const' type parameters.

How does this help with API development?

It provides templates for tRPC to ensure the frontend and backend share types automatically, eliminating the need for manual API contract synchronization.

Can I use this for Python projects?

Yes, it includes specialized patterns for Python type safety, including NewType branding and safe dictionary extraction techniques using 'ty' standards.

What tools does this skill support for validation?

It primarily supports Zod for runtime validation in TypeScript, but also includes patterns for tRPC, Prisma, and Pydantic/ty-based validation for Python.

What is the benefit of exhaustive type checking?

It uses the 'assertNever' pattern to ensure all possible cases in a union or enum are handled at compile-time, preventing bugs when new cases are added to the code.

Type Safety & Validation

Name: Type Safety & Validation
Author: yonatangross

byyonatangross

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API Development

Implements rigorous end-to-end type safety and runtime validation using Zod, tRPC, and Prisma for robust TypeScript and Python applications.

About

This skill empowers Claude with professional-grade patterns for ensuring data integrity across the entire software stack. By integrating Zod for runtime schema validation, tRPC for end-to-end typed APIs, and Prisma for type-safe database interactions, it effectively eliminates common runtime errors and 'any' type leaks. It provides specific implementation strategies for advanced concepts like branded types to prevent ID confusion, exhaustive switch statements for compile-time safety, and strict Python type narrowing, making it an essential toolkit for developers building mission-critical, zero-trust architectures.

Key Features

Branded and nominal typing to prevent accidental variable mixing
29 GitHub stars
Zod-driven runtime validation with schema inference and transformations
Exhaustive type checking and assertNever patterns for switch statements
End-to-end type-safe API communication patterns using tRPC
Strict Python type narrowing and ty-compatible dictionary extraction

Use Cases

Validating external API payloads and user inputs at the system boundary to prevent injection
Refactoring legacy codebases to use strict TypeScript 5.7+ patterns and exhaustive checks
Building full-stack TypeScript applications with shared types between frontend and backend

About

Key Features

Branded and nominal typing to prevent accidental variable mixing
29 GitHub stars
Zod-driven runtime validation with schema inference and transformations
Exhaustive type checking and assertNever patterns for switch statements
End-to-end type-safe API communication patterns using tRPC
Strict Python type narrowing and ty-compatible dictionary extraction

Use Cases

Validating external API payloads and user inputs at the system boundary to prevent injection
Refactoring legacy codebases to use strict TypeScript 5.7+ patterns and exhaustive checks
Building full-stack TypeScript applications with shared types between frontend and backend