Foundation ArcModule 03
Claude Code Basics
Get up and running with Claude Code, Anthropic's official CLI for Claude. Learn installation, configuration, your first session, and how Claude Code differs from the web interface.
5 lessons~3 hoursBeginner
Progress0%
Prerequisites
What you'll learn
Install Claude Code using either npm or the installer script
Authenticate using browser auth (Pro/Max) or API key
Verify your installation is working correctly
Understand the critical difference between subscription auth and API key auth
Understand what the REPL is and how it differs from claude.ai
Start sessions, interrupt responses, and exit cleanly
Navigate the permission system for file reads, writes, and command execution
Know when to use Claude Code vs. claude.ai