The terminal is a text interface that sits underneath your entire computer — every app, file, and internet service is reachable from it. It's where AI coding agents live, because from here they don't just answer questions: they do things.
In five parts you'll install a coding agent, build a Tetris game with it, ship it to the real internet, write a script that organizes your files, see how the terminal connects to everything else on your machine, and learn what to do when things break.
This is a pretend computer inside your browser. Nothing touches your real files. Practice here first, then do it on your machine, for real.
Pick one. Switching later resets your progress.
This is your terminal. Type whatever the current quest tells you to type.