Nanobanana Image Generation Skill

Generate or edit images using Google Gemini API through the nanobanana tool.

Requirements

1. GEMINI_API_KEY: Must be configured in ~/.nanobanana.env or export GEMINI_API_KEY=<your-api-key>
2. Python3 with depedent packages installed: google-genai, Pillow, python-dotenv. They could be installed via python3 -m pip install -r ${CLAUDE_PLUGIN_ROOT}/skills/nanobanana-skill/requirements.txt if not installed yet.
3. Executable: ${CLAUDE_PLUGIN_ROOT}/skills/nanobanana-skill/nanobanana.py

Instructions

For image generation

1. Ask the user for:

   • What they want to create (the prompt)
   • Desired aspect ratio/size (optional, defaults to 9:16 portrait)
   • Output filename (optional, auto-generates UUID if not specified)
   • Model preference (optional, defaults to gemini-3-pro-image-preview)
   • Resolution (optional, defaults to 1K)

2. Run the nanobanana script with appropriate parameters:

   python3 ${CLAUDE_PLUGIN_ROOT}/skills/nanobanana-skill/nanobanana.py --prompt "description of image" --output "filename.png"
   

3. Show the user the saved image path when complete

For image editing

1. Ask the user for:

   • Input image file(s) to edit
   • What changes they want (the prompt)
   • Output filename (optional)

2. Run with input images:

   python3 ${CLAUDE_PLUGIN_ROOT}/skills/nanobanana-skill/nanobanana.py --prompt "editing instructions" --input image1.png image2.png --output 
   

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