nano-banana-pro

Text-to-image generation and image-to-image editing via Google's Gemini 3 Pro Image API. Generate new images or edit existing ones using Google's Nano Banana Pro API (Gemini 3 Pro Image). Run the script using absolute path (do NOT cd to skill directory first): Generate new image: Edit existing image: Important: Always run from the user's current working directory so images are saved where the user is working, not in the skill directory. The Gemini 3 Pro Image API supports three resolutions (uppercase K required): Map user requests to API parameters: The script checks for API key in this order: If neither is available, the script exits with an error message. Generate filenames with the pattern: yyyy-mm-dd-hh-mm-ss-name.png Format: {timestamp}-{descriptive-name}.png Examples: When the user wants to modify an existing image: For generation: Pass user's image description as-is to --prompt . Only rework if clearly insufficient. For editing: Pass editing instructions in --prompt (e.g., "add a rainbow in the sky", "make it look like a watercolor painting") Preserve user's creative intent in both cases. Generate new image: Edit existing image: - Supports both new image generation from text prompts and editing of existing images with instruction-based modifications - Configurable output resolution: 1K (default), 2K, or 4K for high-resolution results - Automatically detects API key from...