Mastering Typescript

spillwavesolutions/mastering-typescript-skill

This is a comprehensive TypeScript reference that covers the modern ecosystem: type system fundamentals, generics, mapped and conditional types, plus framework integration with React 19, NestJS 11, and LangChain.js. It's built around TypeScript 5.9+ with strict mode defaults and includes practical patterns for Zod validation, discriminated unions, and the satisfies operator. Use it when you're migrating JavaScript codebases, setting up type-safe toolchains with Vite 7 and pnpm, or need quick reference for advanced type patterns. The framework sections are especially useful if you're bouncing between React frontends and NestJS backends and want consistent typing patterns across both.

skills.sh installs: 805
GitHub stars: 31
last updated: Aug 21, 2026

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Install

$ npx -y skills add spillwavesolutions/mastering-typescript-skill --skill mastering-typescript --agent claude-code

Installs into .claude/skills of the current project.

Files

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

# Initialize TypeScript project with ESM
pnpm create vite@latest my-app --template vanilla-ts
cd my-app && pnpm install

# Configure strict TypeScript
cat > tsconfig.json << 'EOF'
{
  "compilerOptions": {
    "target": "ES2024",
    "module": "ESNext",
    "moduleResolution": "bundler",
    "strict": true,
    "noUncheckedIndexedAccess": true,
    "exactOptionalPropertyTypes": true,
    "esModuleInterop": true,
    "skipLibCheck": true
  }
}
EOF