Introduction
Welcome to Codex · lesson 1 of 12
In short
- Codex is an agent: it doesn’t just answer, it works directly in your files.
- You’ll find it in the ChatGPT app for your computer, in
Codexmode.- You say what you want in plain words. Codex writes the code, and you check the result.
- In this course you build a real app: “Subscriptions under control”.
- Codex works with your permission. You learn the safety rules from day one.
The analogy
When your tap breaks, you can call a handy friend. They explain over the phone what to do, but you’re the one holding the wrench. Or you can call a plumber.
They bring their own tools, work in your kitchen and ask before cutting a pipe. A chat with an AI is like the friend on the phone. Codex is like the plumber.