Generate and edit images using Google's Nano Banana Pro (Gemini 3 Pro Image) API. Use when the user asks to generate, create, edit, modify, change, alter, or update images. Also use when user references an existing image file and asks to modify it in any way (e.g., "modify this image", "change the b

Nano Banana Pro Image Generation & Editing Generate new images or edit existing ones using Google's Nano Banana Pro API (Gemini 3 Pro Image). Usage 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. Resolution Options The Gemini 3 Pro Image API supports three resolutions (uppercase K required): 1K (default) ~1024px resolution 2K ~2048px resolution 4K ~4096px resolution Map user requests to API parameters: No mention of resolution → 1K "low resolution", "1080", "1080p", "1K" → 1K "2K", "2048", "normal", "medium resolution" → 2K "high resolution", "high res", "hi res", "4K", "ultra" → 4K API Key The script checks for API key in this order: 1. api key argument (use if user provided key in chat) 2. GEMINI API KEY environment variable If neither is available, the script exits with an error message. Filename Generation Generate filenames with the pattern: yyyy mm dd hh mm ss name.png Format: {timestamp} {descriptive name}.png Timestamp: Current date/time in format yyyy mm dd hh mm ss (24 hour format) Name: Descriptive lowercase text with hyphens Keep the descriptive part concise (1 5 words typically) Use context from user's prompt or conversation If unclear, use random identifier (e.g., x9k2 , a7b3 ) Examples: Prompt "A serene Japanese garden" → 2025 11 23 14 23 05 japanese garden.png Prompt "sunset over mountains" → 2025 11 23 15 30 12 sunset mountains.png Prompt "create an image of a robot" → 2025 11 23 16 45 33 robot.png Unclear context → 2025 11 23 17 12 48 x9k2.png Image Editing When the user wants to modify an existing image: 1. Check if they provide an image path or reference an image in the current directory 2. Use input image parameter with the path to the image 3. The prompt should contain editing instructions (e.g., "make the sky more dramatic", "remove the person", "change to cartoon style") 4. Common editing tasks: add/remove elements, change style, adjust colors, blur background, etc. Prompt Handling 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. Output Saves PNG to current directory (or specified path if filename includes directory) Script outputs the full path to the generated image Do not read the image back just inform the user of the saved path Examples Generate new image: Edit existing image:

nano-banana-pro