How do I install Claude Code?

Three steps, ~60 seconds total:

1. Install the CLI: npm i -g @anthropic-ai/claude-code (requires Node.js 18+).
2. Authenticate: Run claude login, opens browser, signs in with your Anthropic account (Pro / Team / API). Or set ANTHROPIC_API_KEY env var if you’re using API direct.
3. Run it: cd into any repo, type claude, ask your first question. That’s it.

For corporate setups behind a proxy, see the 5-step setup section above. For Magento-specific install + CLAUDE.md, see our Magento playbook.