nano-banana-pro
Generate images using AI. Use when the user asks to create, generate, or make images, pictures, graphics, illustrations, visuals, or artwork. Also use for image editing with reference images.
What this skill does
# Nano Banana Pro - AI Image Generation
Generate images using Google's Gemini 3 Pro Image model.
## Usage
Run the generation script:
```bash
python ~/.claude/skills/nano-banana-pro/generate_image.py "your prompt here" [options]
```
## Options
| Option | Description | Default |
|--------|-------------|---------|
| `--resolution` | Output size: 1K, 2K, or 4K | 2K |
| `--aspect` | Aspect ratio: 16:9, 1:1, 4:3, 9:16, 3:4 | 16:9 |
| `--output` | Output directory path | ./generated_images |
| `--reference` | Reference image(s) for style/editing (up to 14) | None |
| `--format` | Output format: png, jpeg, webp | png |
| `--no-text` | Add instruction to exclude text/typography | off |
| `--cinematic` | Add cinematic film style (ARRI, shallow DoF, grain) | off |
| `--photorealistic` | Add photorealistic style hints | off |
## Examples
### Basic generation
```bash
python ~/.claude/skills/nano-banana-pro/generate_image.py "a serene mountain landscape at sunset, photorealistic"
```
### Square image for social media
```bash
python ~/.claude/skills/nano-banana-pro/generate_image.py "abstract geometric pattern in blue and gold" --aspect 1:1 --resolution 2K
```
### High-res with custom output
```bash
python ~/.claude/skills/nano-banana-pro/generate_image.py "futuristic city skyline" --resolution 4K --output ~/Pictures/ai-generated
```
### Style transfer with reference image
```bash
python ~/.claude/skills/nano-banana-pro/generate_image.py "transform this into a watercolor painting" --reference input.jpg
```
### Image editing with reference
```bash
python ~/.claude/skills/nano-banana-pro/generate_image.py "add a rainbow in the sky" --reference landscape.png
```
## Output
Images are saved with timestamp filenames:
- Format: `{timestamp}_{sanitized_prompt}.{format}`
- Example: `20260106_143052_serene_mountain_landscape.png`
The script outputs the full path to the generated image.
## Requirements
- Python 3.10+
- `google-genai` library
- `GEMINI_API_KEY` environment variable
## Notes
- Gemini 3 Pro Image requires paid billing (no free tier)
- Generated images include SynthID watermarking
- Reference images enable style transfer and editing capabilities
- **Raw prompts by default**: Prompts are sent unadulterated. Use `--no-text`, `--cinematic`, or `--photorealistic` flags to add style hints.
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