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typescript-pro

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Idiomatic TypeScript: strict typing, generics, discriminated unions, project setup, and type-driven design. Use when writing or reviewing TypeScript, or configuring TS projects.

skills/typescript-pro/SKILL.md

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# TypeScript Pro

## Overview

TypeScript's value isn't "JavaScript with types sprinkled on" — it's **making illegal states
unrepresentable** so whole bug classes disappear at compile time. This skill covers professional
TypeScript: strict configuration, modeling with the type system (unions, narrowing, branded types),
generics done right, and the tooling setup (build, lint, test) that keeps a TS codebase healthy.

The through-line: let the compiler carry the weight. If a bug is expressible as a type error,
express it.

## When to use