name: nano-banana-pro description: Generate images using Google's Nano Banana Pro (gemini-3-pro-image-preview). Use when user asks to create, generate, or draw images, infographics, visualizations, diagrams, charts, illustrations, or any visual content. Excellent for data-accurate infographics and text rendering. allowed-tools: Bash, Write, Read

Nano Banana Pro Image Generator

Generate images using Google's advanced Nano Banana Pro model (gemini-3-pro-image-preview).

Prerequisites

The user must have GEMINI_API_KEY environment variable set with a valid Google AI API key.

Usage

The script is located in the same directory as this SKILL.md file. Run it with uv run:

uv run /path/to/skills/nano-banana-pro/generate_image.py "your prompt" -o output.png

When this skill is invoked, locate generate_image.py in the skill directory and run it.

Parameters

Examples

Basic image generation:

uv run generate_image.py "A sunset over mountains" -o sunset.png

Infographic with specific aspect ratio:

uv run generate_image.py "Infographic showing the water cycle with labeled stages" -o water_cycle.png --aspect-ratio 9:16

High-resolution ultrawide:

uv run generate_image.py "Professional photo of a modern office space" -o office.png --aspect-ratio 21:9 --size 4K

Model Capabilities

Nano Banana Pro excels at:

• Accurate infographics with real data (uses Google Search grounding)
• Text rendering in images
• Cartographic visualizations and maps
• Detailed instruction following
• Chain-of-thought reasoning for complex visual tasks

Output

The script prints:

• Progress message while generating
• Path to saved image on success
• Any text response from the model
• Error message if no image was generated