Swarmclaw nano-banana-pro

Generate or edit images via Gemini 3 Pro Image (Nano Banana Pro). Use when asked to create, generate, or edit images and a Gemini API key is available. Supports text-to-image generation, single-image editing, and multi-image composition (up to 14 images).

install

source · Clone the upstream repo

git clone https://github.com/swarmclawai/swarmclaw

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/swarmclawai/swarmclaw "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/nano-banana-pro" ~/.claude/skills/swarmclawai-swarmclaw-nano-banana-pro && rm -rf "$T"

manifest: skills/nano-banana-pro/SKILL.md

source content

Nano Banana Pro (Gemini 3 Pro Image)

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

Set

GEMINI_API_KEY

as an environment variable, or pass

--api-key <KEY>

to the script.

Aspect Ratio (optional)

uv run {baseDir}/scripts/generate_image.py --prompt "portrait photo" --filename "output.png" --aspect-ratio 9:16

Notes

Resolutions:
```
1K
```
(default),
```
2K
```
,
```
4K
```
.
Aspect ratios:
```
1:1
```
,
```
2:3
```
,
```
3:2
```
,
```
3:4
```
,
```
4:3
```
,
```
4:5
```
,
```
5:4
```
,
```
9:16
```
,
```
16:9
```
,
```
21:9
```
. Without
```
--aspect-ratio
```
, the model picks freely.
Use timestamps in filenames for uniqueness:
```
yyyy-mm-dd-hh-mm-ss-name.png
```
.
Do not read the image back into context; report the saved path only.