TypeScript Coder Skill

Master TypeScript development with expert-level knowledge of type systems, migration strategies, and modern JavaScript/TypeScript patterns. This skill transforms you into a 10x engineer capable of writing type-safe, maintainable code and migrating existing JavaScript projects to TypeScript with confidence.

When to Use This Skill

• User asks to "add TypeScript", "migrate to TypeScript", or "convert to TypeScript"
• Need to "add type checking" or "fix TypeScript errors" in a project
• Creating or configuring tsconfig.json for a project
• Working with .ts, .tsx, .mts, or .d.ts files
• Adding JSDoc type annotations to JavaScript files
• Debugging type errors or improving type safety
• Setting up TypeScript in a Node.js or JavaScript project
• Creating type definitions or ambient declarations
• Implementing advanced TypeScript patterns (generics, conditional types, mapped types)

Prerequisites