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Nano Banana Image
nano-banana-image
Generate and edit images using Google's Nano Banana Pro (Gemini 3 Pro Image) model.
SKILL.md
Full skill instructions
nano-banana-image
Generate and edit images using Google's Nano Banana Pro (gemini-3-pro-image) model.
When to use this skill
Use this skill when the user wants to:
- Generate images from text prompts
- Edit or transform existing images with instructions
- Create logos, illustrations, product photos, or any visual content
Usage
cd ~/.claude/skills/nano-banana-image
node scripts/nano_banana.js [options]
Options
| Flag | Description | Default |
|---|---|---|
--prompt | Text prompt describing the image | required |
--input | Path to input image for editing | none |
--out | Output path for generated image | outputs/output.png |
--aspect | Aspect ratio: 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9, 21:9 | 1:1 |
--size | Resolution: 1K, 2K, 4K | 1K |
Model
Uses gemini-3-pro-image (Nano Banana Pro) for all generation — high-fidelity text-to-image and image editing, with 2K/4K output.
Examples
Text to image:
node scripts/nano_banana.js \
--prompt "A clean minimalist ninja logo, bold outline, white background" \
--out outputs/logo.png
Edit existing image:
node scripts/nano_banana.js \
--input inputs/room.png \
--prompt "Restyle this room as modern Japanese minimalism" \
--out outputs/room_edited.png
High quality widescreen at 2K:
node scripts/nano_banana.js \
--aspect 16:9 \
--size 2K \
--prompt "A cinematic product photo of a smartwatch on a reflective surface" \
--out outputs/product.png
Requirements
- Node.js 18+
GEMINI_API_KEYenvironment variable (get one at Google AI Studio)
Setup
cd ~/.claude/skills/nano-banana-image
bun install
export GEMINI_API_KEY="your-key-here"
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