Gemini CLI Tutorial: Use Google's Open-Source Terminal Agent

Gemini CLI brings Google's Gemini models into a terminal workflow. It is especially useful when you want an open-source agent surface that can be inspected, extended, and connected to project-specific tools.

The basic flow is simple: install the CLI, start it from the repository, authenticate, and ask it to inspect the project before making edits. For organizational paid Code Assist usage, Google also documents project configuration through a Google Cloud project.

Good first tasks include explaining an unfamiliar module, drafting a test plan, finding dead code, updating documentation, or making a small change with a clear command to verify it.

Gemini CLI becomes more useful when paired with MCP servers and extensions, but every tool connection should be treated as an added permission surface. Start with read-only context before allowing write actions.