Gemini CLI

Use Gemini in headless one-shot mode. Positional text starts interactive mode; use -p/--prompt.

Quick start

• gemini -p "Answer this question..."
• gemini -m <model> -p "Prompt..."
• gemini -p "Return JSON" --output-format json
• stdin appends to -p: cat notes.md | gemini -p "Summarize"

Extensions

• List: gemini --list-extensions
• Manage: gemini extensions <command>
• Skills: gemini skills <command>
• Hooks: gemini hooks <command>
• MCP: gemini mcp <command>

Notes

• If auth is required, run once interactively and follow the login flow.