Claude Code: Everything You Need to Know

Learn Claude Code in three levels, from your first session to unattended multi-agent runs.

You learn by doing: every core lesson and capstone ends with a check you run in your own practice copy, and every Beginner lesson and the capstone run step by step in a terminal app beside Claude Code.
Try it now · Pick your level · Every page

The learning app, npm run learn, on its first run.

Try it now

You need a paid Claude plan (Pro, Max, Team or Enterprise), a Claude Console account, or a supported cloud provider (Quickstart), plus Node.js LTS and git.

1. Make your practice copy: open claude-code-practice, select Use this template > Create a new repository, and clone your copy. Or open your copy in a Codespace, where Node.js and Claude Code come preinstalled.

2. In your copy, start the app:

   npm run learn
   

3. Open a second terminal in the same folder. The app tells you what to type there, starting with installing Claude Code, and checks your work as you go.

The app teaches every Beginner lesson and the capstone. It has no AI in it and changes none of your work.

For Intermediate and Advanced, or if you prefer to read, every lesson works from its page alone. Each core lesson ends with a check you run from your practice copy, for example npm run check -- b-1: each item prints PASS or FAIL, with a hint for what to fix.

Help that fades as you learn

The help shrinks as you get better: GUIDED shows every command, HINTED gives the goal and a hint each time you press h, and CHALLENGE gives just the goal.

Beginner lesson 1, steps 1 and 11.

Pick your level

Beginner

For you if you're new to Claude Code and comfortable with a terminal and git.
You'll take one change from request to commit, safely, and give your project a memory. About 2½ hours: 5 lessons, a capstone and 3 Electives.
Start Beginner

Intermediate

Ready if you can plan a change in plan mode, review the diff and commit it, and keep a long session on track.
You'll shape Claude Code to your project with skills, hooks, subagents, MCP and plugins. About 3 hours: 8 lessons, a capstone and 4 Electives.
Start Intermediate

Advanced

Ready if you can write a project skill, enforce a rule with a hook, delegate to a subagent and connect an MCP server.
You'll run Claude Code in parallel, unattended in CI, and for a team, within limits you set. About 3 hours 20 minutes, plus run time: 7 lessons, a capstone and 5 Electives.
Start Advanced

Everything in the guide

Every page, by level