Nano Banana Image Generation & Editing

Generate new images or edit existing ones using Google's Gemini image API.

Default model: Nano Banana 2 (gemini-3.1-flash-image-preview) — cheaper, faster, more features. Legacy model: Nano Banana Pro (gemini-3-pro-image-preview) — available via --model nano-banana-pro, deprecated 9 March 2026.

Usage

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

Generate new image:

uv run ~/.claude/skills/nano-banana/scripts/generate_image.py --prompt "your image description" --filename "output.png" [--resolution 0.5K|1K|2K|4K] [--aspect-ratio 16:9] [--thinking high] [--api-key KEY]

Edit existing image:

uv run ~/.claude/skills/nano-banana/scripts/generate_image.py --prompt "editing instructions" --filename "output.png" --input-image "path/to/input.png" [--resolution 0.5K|1K|2K|4K] [--api-key KEY]