Claude Code CLI Setup for Terminal-First Developers

The Claude Code CLI is built for developers who want an agent inside the terminal — close to git, build tools, and SSH sessions. Setup is straightforward, but small environment mistakes (PATH, auth tokens, wrong working directory) cause most first-day friction.

When CLI beats desktop

Choose CLI if you already work in tmux, remote VMs, or CI-like local scripts. Desktop shines for visual diff review; CLI shines for repeatable commands, scripting, and headless servers.

Installation overview

1. Install via the method shown on claude.com/download for your OS.
2. Open a new terminal so PATH updates apply.
3. Run the login flow and confirm identity in the browser if prompted.
4. cd into a git repo — agents work best with project context.

Project root and context

Always start the CLI from the repository root or a defined subpackage. Monorepos should narrow scope: "only touch packages/web" prevents stray edits in infrastructure folders. Add an AGENTS.md or rules file if your team documents boundaries (see our AGENTS.md guide).

Safe defaults

• Never export production secrets into prompts — use env vars.
• Review diffs before bulk apply; use branches.
• Pin tool versions in CI the same way you do locally.

CLI on Windows specifically

Prefer PowerShell 7 over legacy cmd. WSL2 is fine, but keep files in the Linux filesystem when performance matters — editing through /mnt/c/ can be slow on large trees.

Compare workflows in Claude Code vs desktop if you are still deciding.