Nano Banana Pro Image Generation, Editing & Prompting

Generate new images, edit existing ones, or craft precise prompts for Google's Nano Banana Pro API (Gemini 3 Pro Image), including style transfer, color-grade transfer, locked-variable edits, text-heavy layouts, and subject replacement.

Usage

Run the script using absolute path (do NOT cd to skill directory first):

Generate new image:

uv run ~/skills/nano-banana-pro/scripts/generate_image.py --prompt "your image description" --filename "output-name.png" [--resolution 1K|2K|4K] [--api-key KEY]

Edit existing image:

uv run ~/skills/nano-banana-pro/scripts/generate_image.py --prompt "editing instructions" --filename "output-name.png" --input-image "path/to/input.png" [--resolution 1K|2K|4K] [--api-key KEY]

Important: Always run from the user's current working directory so images are saved where the user is working, not in the skill directory.