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AI image generation CLI powered by Gemini 3 Pro. Green screen transparency, reference images, style transfer. Also a Claude Code plugin.
| Date | Stars |
|---|---|
| 2026-07-31 | 403 |
| 2026-08-05 | 403 |
| 2026-08-06 | 403 |
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# Nano Banana 2 Skill AI image generation CLI powered by Gemini 3.1 Flash Image Preview (default) with support for Gemini 3 Pro and any Gemini model. Multi-resolution (512-4K), aspect ratios, cost tracking, broadcast-grade green screen transparency, reference images, and style transfer. Also ships as a [Claude Code](https://docs.anthropic.com/en/docs/claude-code) skill for AI-assisted image generation workflows. ## Install **Requirements:** [Bun](https://bun.sh), [FFmpeg](https://ffmpeg.org) + [ImageMagick](https://imagemagick.org) (for transparent mode) ```bash # Clone the repo git clone https://github.com/kingbootoshi/nano-banana-2-skill.git ~/tools/nano-banana-2 cd ~/tools/nano-banana-2 # Install dependencies bun install # Link globally (no sudo needed - uses Bun's global bin) bun link # Set up your API key mkdir -p ~/.nano-banana echo "GEMINI_API_KEY=your_key_here" > ~/.nano-banana/.env ``` Get a Gemini API key at [Google AI Studio](https://aistudio.google.com/apikey). Now you can use `nano-banana` from anywhere. ### As a Claude Code Skill When installed as a Claude Code skill, just say `/init` and Claude will clone the repo, install deps, and link the command for you. Then use it by saying "generate an image of..." and Claude handles the rest. ### Fallback (if `bun link` doesn't work) ```bash mkdir -p ~/.local/bin ln -sf ~/tools/nano-banana-2/src/cli.ts ~/.local/bin/nano-banana echo 'export PATH="$HOME/.local/bin:$PATH"' >> ~/.zshrc source ~/.zshrc ``` ## Usage ```bash # Basic - generates 1K image to current directory nano-banana "minimal dashboard UI with dark theme" # Custom output name nano-banana "luxury product mockup" -o product # Higher resolution nano-banana "detailed landscape painting" -s 2K # Ultra high res nano-banana "cinematic widescreen scene" -s 4K -a 16:9 # Lower resolution (fast, cheap) nano-banana "quick sketch concept" -s 512 # Custom output directory nano-banana "UI screenshot" -o dashboard -d ~/Pictures ``` ### Models ```bash # Default - Nano Banana 2 (Gemini 3.1 Flash, fast and cheap) nano-banana "your prompt" # Pro - highest quality, 2x cost nano-banana "your prompt" --model pro # Any model ID nano-banana "your prompt" --model gemini-2.5-flash-image ``` | Alias | Model | Best For | |-------|-------|----------| | `flash`, `nb2` | Gemini 3.1 Flash Image Preview | Speed, cost, high-volume | | `pro`, `nb-pro` | Gemini 3 Pro Image Preview | Highest quality, complex composition | ### Aspect Ratios ```bash # Widescreen nano-banana "cinematic landscape" -a 16:9 # Portrait nano-banana "mobile app screenshot" -a 9:16 # Ultra-wide nano-banana "panoramic scene" -a 21:9 # Standard photo nano-banana "product photo" -a 4:3 ``` Supported: `1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`, `4:5`, `5:4`, `21:9` ### Reference Images Edit, transform, or combine existing images: ```bash # Edit an existing image nano-banana "change the background to pure white" -r dark-ui.png -o light-ui # Style transfer - multiple references nano-banana "combine these two UI styles into one" -r style1.png -r style2.png -o combined # Color correction nano-banana "make this image more vibrant and increase contrast" -r photo.jpg ``` ### Transparent Assets Generate assets with transparent backgrounds using AI-powered background removal: ```bash # Basic transparent asset nano-banana "robot mascot character" -t -o mascot # Logo with transparency nano-banana "minimalist tech logo" -t -o logo # Game asset nano-banana "pixel art treasure chest" -t -o chest ``` The `-t` flag automatically prompts the AI to generate on a green screen, then uses FFmpeg `colorkey` + `despill` to key out the background and remove green spill from edge pixels. ImageMagick trims the result. Requires: `brew install ffmpeg imagemagick` ### Exact Dimensions Control output dimensions by using a blank image as the last reference: ```bash # First -r: your style reference # Last -r: blank image in target dimensions nano-banana "p
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Read on GitHubWould you bet a product on this? Bounded 0–100 and slow moving.
matched fp:0e456986b7c33882, llm:description: 'AI image generation CLI powered by Gemini 3 Pro. Green screen transparency, reference images, style transfer. Also a Claude Code plugin.'
matched fp:0e456986b7c33882, llm:description: 'AI image generation CLI powered by Gemini 3 Pro. Green screen transparency, reference images, style transfer. Also a Claude Code plugin.'
matched fp:0e456986b7c33882, llm:description: 'AI image generation CLI powered by Gemini 3 Pro. Green screen transparency, reference images, style transfer. Also a Claude Code plugin.'