nanobanana
Nano Banana images with Gemini CLI
Overview
Use Gemini CLI plus the Nano Banana extension to generate and edit images via slash commands. Outputs are saved to ./nanobanana-output/ for review or delivery.
Prerequisites
- Confirm Gemini CLI is installed:
gemini --version - Confirm the extension is installed:
gemini extensions install https://github.com/gemini-cli-extensions/nanobanana - Ensure an API key is set:
NANOBANANA_GEMINI_API_KEY,NANOBANANA_GOOGLE_API_KEY,GEMINI_API_KEY, orGOOGLE_API_KEY - Optional: set
NANOBANANA_MODEL=gemini-3-pro-image-previewfor Nano Banana Pro - If MCP tools are blocked by policy, run with approvals:
gemini --approval-mode yolo -p "..."or allow the MCP server with--allowed-mcp-server-names nanobanana
Workflow
- Identify the request type (generate, edit, restore, icon, pattern, story, diagram).
- Ensure any input images are in the current directory or the extension search paths.
- Start Gemini CLI in the working directory:
gemini(or usegemini --approval-mode yolo -p "..."for one-shot runs)
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