Your first session

Start a session by running claude in your project directory. From there, a handful of built-in commands guide you through setup:

/init walks you through creating a CLAUDE.md for your project
/agents helps configure custom subagents
/doctor diagnoses common issues with your installation
/context shows what is using space in the context window
/model switches models mid-session

Claude Code can teach you how to use it — ask questions like "how do I set up hooks?" and it will explain.

# install (macOS / Linux / WSL)
curl -fsSL https://claude.ai/install.sh | bash

# start a session in your project
cd ~/work/my-app
claude

# one-shot / scripted usage
claude -p "summarize the failing tests"

Check your understanding

Question 1Which command creates a CLAUDE.md for your project interactively?

Question 2What does /context show?