You’ve talked to AI before — typed a question into a chat box, gotten an answer back. This is that, and then a step further.
Now meet something that can type back — and do things on your behalf.
Claude Code is an agent: a smart assistant that runs in an app on your desktop, sees the folder you point it at, and can read your files and do real work in them.
Already know what Claude Code is? Skip to Lesson 1.2 and install it.
That’s the whole idea. The rest of this lesson exists to make sure you don’t think it’s something it isn’t.
Claude vs. Claude Code
Two things, same root word. Worth getting straight up front — same trick as Lesson 0.4, where a program and a running program shared a name but did different jobs.
- Claude is the model — the AI brain trained by Anthropic. It lives in a website (claude.ai), inside apps, and inside other products. It answers when you write to it.
- Claude Code is what happens when you give Claude hands. It’s the model plus a set of tools — read files, edit them, run things, search the web — wrapped into an app that runs on your computer.
Same brain. Very different superpowers.
Not just a smarter chatbot
This is the part that trips people up, especially if you’ve used ChatGPT or claude.ai in a browser tab.
A chatbot in a browser can describe what’s probably in your folder. It can guess. It can be confidently wrong — it has no way to actually look.
Claude Code can open your folder, read what’s actually there, and tell you. Then it can open one of those files. Then it can change a line in it. Then it can check the change worked.
A chatbot talks about your files. An agent works on them.
The difference sounds small in a sentence. In practice it’s the difference between getting advice and getting help.
What it gets you
Once it’s installed and you’re signed in (next two lessons), you’ll be able to:
- Point Claude at a folder and ask “what is this?” — it’ll read the files and tell you.
- Hand it a messy spreadsheet and ask it to clean it up — it’ll open it and do the work.
- Ask it to turn a folder of notes into a summary — it reads them and writes it.
You don’t copy-paste your work in and out of a chat window. Your files stay where they live, and Claude works on them directly.
What’s next
You know what Claude Code is. Time to actually get it on your machine.