Walkthrough

Install the CLI

Get Claude Code running on your machine and verify the install.

Steps · 0 / 4 done

Install via npm
Claude Code ships as an npm package. Run this in your terminal:
```
npm install -g @anthropic-ai/claude-code
```
VerifyWhen it finishes, `claude --version` should print a version number.
Authenticate
Launch Claude Code from any directory. The first run opens a browser window for OAuth login with your Claude account.
```
claude
```
VerifyAfter login the prompt becomes interactive and shows your working directory in the header.
Pick a project
Quit (Ctrl+C twice) and re-run `claude` from inside an existing repo. The directory you launch from becomes the working tree the agent can read and edit.
```
cd ~/code/your-project
claude
```
VerifyThe header shows the project path. Type "hi" to confirm the agent responds.
Try a smoke test
Ask the agent to describe your repo. If it can list files and summarize the structure, your install is healthy.
```
What does this repo do? Read package.json and the README, then summarize in 3 lines.
```
VerifyYou should see a Read tool call against your files, then a 3-line summary.

Check your understanding

Q1. Which folder becomes Claude Code's working tree?

· Tick off the 4 step(s) above.

· Score 100% on the quiz.