What Claude Code is and where things live

• Claude Code is an AI coding assistant that runs in your terminal, the text window where you type commands. It reads your project, edits files and runs commands for you.
• You need a paid Claude plan (Pro, Max, Ultra, Team or Enterprise) or a Claude Console account. The free Claude plan doesn't include Claude Code. At work, log in with the account your company gave you.
• Install it once. Then open a terminal in your project folder and type claude. The first time, it opens your browser so you can log in.
• A session is one conversation with Claude in one folder. /help lists commands, /resume reopens an earlier conversation and /exit leaves.
• A permission prompt is Claude asking before it edits a file or runs a command. CLAUDE.md is a notes file Claude reads at the start of every session. You'll write one in the next milestone.