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Installing Claude Code

Getting Claude Code running on your machine. Arc II assumes this is done.

Mosaic's Arc II assumes you've got Claude Code installed. Here's the shape of it:

  1. Install Node.js. Claude Code runs on Node. Download from nodejs.org and run the installer.
  2. Install Claude Code. In your terminal, run the install command from Anthropic's documentation.
  3. Sign in. Run claude in any project folder and follow the auth prompt.
  4. Test it. Type claude inside a folder. Ask it something simple like "what files are here?"

Install steps change with new releases. Always check docs.claude.com for the current instructions. Mosaic's Chapter 0-3 walks you through the exact commands in use right now.

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