Nano Banana Pro (Gemini 3 Pro Image)

SkillMedia

Generate or edit images via Gemini 3 Pro Image (Nano Banana Pro).

Available today. Use it from your connected AI after setup.

No other account needed.

Connect ahel once, and every AI you use reads what you have installed.

Then ask your AI: use the Nano Banana Pro (Gemini 3 Pro Image) skill

What this skill tells your AI

The instructions your AI receives, as published by understudy-ai/understudy in skills/nano-banana-pro/SKILL.md and read by ahel’s review.

Use the bundled script to generate or edit images.

Generate

uv run {baseDir}/scripts/generate_image.py --prompt "your image description" --filename "output.png" --resolution 1K

Edit (single image)

uv run {baseDir}/scripts/generate_image.py --prompt "edit instructions" --filename "output.png" -i "/path/in.png" --resolution 2K

Multi-image composition (up to 14 images)

uv run {baseDir}/scripts/generate_image.py --prompt "combine these into one scene" --filename "output.png" -i img1.png -i img2.png -i img3.png

API key

GEMINI_API_KEY env var
Or set skills."nano-banana-pro".apiKey / skills."nano-banana-pro".env.GEMINI_API_KEY in ~/.understudy/config.json5

Notes

Resolutions: 1K (default), 2K, 4K.
Use timestamps in filenames: yyyy-mm-dd-hh-mm-ss-name.png.
The script prints a MEDIA: line for Understudy to auto-attach on supported chat providers.
Do not read the image back; report the saved path only.

Automated review, not a security audit. Ruleset v1+k2.

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