Claude Code: The Complete Setup Guide for macOS, Windows, and Linux

Claude Code is Anthropic's official command-line agent for software engineering. It lives in your terminal, reads your repository, runs commands on your behalf, and edits files with a level of context awareness that no autocomplete can match. This guide walks you through installing it on macOS, Windows, and Linux, signing in, configuring your first project, and getting to a productive flow before lunch. We'll skip the marketing and focus on the parts that actually matter — the install steps that