Summary  
This chapter covers installing and configuring a command-line AI code assistant, including theme selection, OAuth authentication, and trusting project folders.  

General domain of usage  
Software development tools and workflows

To start using Claude Code, install it on your computer using the official documentation. Choose the instructions for your operating system and preferred installation method. On macOS, Claude Code can be installed directly through the terminal.

After installation, type `claude` in the terminal to launch the setup process. You can then select an interface theme and choose how to authenticate.

### Connecting Your Claude Account

The setup opens Claude in your browser and asks you to sign in. In the workflow shown, Claude Code requires a **Claude Pro or Max subscription**.

After signing in:

1. Approve Claude Code’s access to your account.
2. Copy the authorization code if requested.
3. Paste it into the terminal.
4. Confirm the recommended security settings.
5. Mark the current project folder as trusted.

Claude Code can now work inside that folder and respond directly in the terminal. You can confirm the installation with a simple test prompt.

What happens when you run the `claude` command after installation?

Learn how to use Claude Code to plan, build, improve, and automate a practical business application. You will set up an effective project environment, give Claude reliable context, turn specifications into working features, create reusable skills, connect external tools, and schedule recurring processes.

Explore how Claude Code works, install it locally, and use it to complete your first practical tasks. Learn how project context improves its results and how to refine and deploy what it creates.

Installing and Configuring Claude Code

Connecting Your Claude Account