Advanced TypeScript Patterns

Master advanced TypeScript — generics, conditional types, template literals, branded types, discriminated unions, and type-level programming. Generates type-safe utilities and fixes complex type errors.

This skill helps you leverage TypeScript's advanced type system. It creates generic utility types, implements branded types for domain safety, builds type-safe event systems, resolves complex TS errors, and generates declaration files. Turns runtime checks into compile-time guarantees.

When to use

Use when fighting with TypeScript errors, designing type-safe APIs, creating utility types for your codebase, understanding complex generics, or migrating JavaScript to strict TypeScript.

Examples

Fix complex type error

Decode and fix an incomprehensible TypeScript error

Getting 'Type instantiation is excessively deep and possibly infinite' — help me understand and fix this type

Type-safe event system

Build a fully typed event emitter

Create a type-safe event emitter where event names and payloads are validated at compile time