generate-image

created	"2025-12-16T00:00:00.000Z"
modified	"2026-05-09T00:00:00.000Z"
reviewed	"2026-04-25T00:00:00.000Z"
description	Image generation via Gemini 3 Pro Image: aspect ratio, resolution, reference images. Use when creating artwork, product photos, or mockups with AI.
allowed-tools	Bash, Read, WebFetch
model	sonnet
args	<prompt> [--aspect <ratio>] [--resolution <size>] [--reference <path>]
disable-model-invocation	true
name	generate-image

Generate images using Google's Nano Banana Pro (Gemini 3 Pro Image) model.

When to Use This Skill

Use this skill when...	Use imagemagick-conversion instead when...
Producing a brand-new image from a text prompt	Converting, resizing, or compressing an existing image
Generating cinematic, product, or portrait artwork	Building thumbnails or batch-processing many files
Mixing up to five reference images into a new render	Applying deterministic transforms (rotate, crop, format)

Use this skill when...	Use mermaid-diagrams or d2-diagrams instead when...
The output is a photographic or illustrative image	The output is a flowchart, sequence, or architecture diagram
Quality settings (1K/2K/4K) and aspect ratio matter	Diagram-as-code rendering would be more maintainable

Arguments

• {{arg:1}} (required): Image description
• --aspect: Aspect ratio (1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9) - default: 16:9
• --resolution: Image resolution (1K, 2K, 4K) - default: 2K
• --reference: Path to reference image (repeatable, max 5)
• --output: Custom output path

Environment Requirements

Verify API key is set:

echo "API Key: ${GOOGLE_API_KEY:+SET}${GEMINI_API_KEY:+SET}"

If not set, get one from: https://aistudio.google.com/apikey

Usage Examples

/generate-image "A beautiful mountain landscape at sunset"
/generate-image "Product photo on white background" --aspect 1:1 --resolution 4K
/generate-image "Portrait photo" --aspect 3:4
/generate-image "Cinematic scene" --aspect 21:9
/generate-image "Similar style" --reference existing_image.png