TypeScript · free, forever

The type system is the best prompt you will ever write.

Free TypeScript tutorials, plus how to use the type system as a correctness harness for AI-generated code.

Three tracks

Most tutorial sites stop at track one. Track one is the part your assistant already knows.

Start here

The pages people actually come back to.

Foundations

Short, runnable, and honest about what you can safely skim.

See all 23 foundation lessons →

Get the TypeScript agent pack

A battle-tested AGENTS.md, the review checklist, and the failure-mode cheat sheet for TypeScript. One email, then occasional updates when the tooling shifts. No course pitch.

Unsubscribe in one click. We never sell the list. Or just take the AGENTS.md now — no email needed.