Mastering Modern TypeScript Build enterprise-grade, type-safe applications with TypeScript 5.9+. Compatibility: TypeScript 5.9+, Node.js 22 LTS, Vite 7, NestJS 11, React 19 Quick Start When to Use This Skill Use when: - Building type-safe React, NestJS, or Node.js applications - Migrating JavaScript codebases to TypeScript - Implementing advanced type patterns (generics, mapped types, conditional types) - Configuring modern TypeScript toolchains (Vite, pnpm, ESLint) - Designing type-safe API contracts with Zod validation - Comparing TypeScript approaches with Java or Python Project Setup Chec…