Getting started

Module 1 · Beginner

What Claude Code is, how the agentic loop works, and what Claude can see and do.

5 lessons. Work through them in order — each one builds on the last.

What is Claude Code?What an agentic coding tool is, and how Claude Code differs from an inline assistant. Covers the three execution environments — local, cloud, remote control — and the interfaces they share.

The agentic loopThe three phases Claude works through on every task: gather context, take action, verify results. Shows how the phases blend, and how you interrupt and steer them.

Models and toolsChoosing between Sonnet and Opus, and switching mid-session. Surveys the five categories of built-in tools that let Claude act rather than only answer.

What Claude can accessWhat Claude can read, edit and run in your project, and what stays out of reach. The boundaries that make the loop safe to leave running.

Your first sessionStarting a session in your own repository and the handful of commands that set it up: /init, /doctor, /context, /model. Includes practice in the simulator.