image

name	image
description	Generate, edit, and compose images using Google's Gemini image models via cURL and the REST API. Use this skill when the user asks to create images, generate visuals, edit photos, compose multiple images, create logos, thumbnails, infographics, product shots, or any image generation task. Supports text-to-image, image editing, multi-image composition, iterative refinement, and aspect ratio control.
user-invocable	false

Image

Image generation skill powered by Google's Gemini image models via the REST API.

Shell Environment

Before proceeding, invoke /loreduck:shell-environment to learn about the shell commands available in this skill and the environment they run in.

Task Workflows

All workflows use the same REST endpoint. The difference is in the request body.

Text-to-Image Generation

Use the create_image command to generate an image from a text prompt. It handles the API call, response extraction, and WebP conversion in one step.

create_image <prompt> <output_image> [aspect_ratio] [image_size]

Examples:

# Basic generation
create_image "A cat wearing a wizard hat" output.webp

# With aspect ratio
create_image "Futuristic motorcycle on Mars" output.webp "16:9"

# With aspect ratio and resolution
create_image "Futuristic motorcycle on Mars" output.webp "16:9" "4K"

The default image size is 2K. See Generation Options for available aspect ratios and resolutions.

Edit an Existing Image

Use the modify_image command to edit an existing image. It handles encoding, API calls, response extraction, and WebP conversion in one step.

modify_image <source_image> <prompt> <output_image> [aspect_ratio]

Examples:

# Basic edit
modify_image input.png "Add a sunset to the background" output.webp

# Edit with aspect ratio
modify_image input.png "Add a sunset to the background" output.webp "16:9"

Supports PNG, WebP, and JPEG source images (MIME type is detected automatically from the file extension).

Compose Multiple Images

Use the compose_image command to combine multiple source images into a new image. Supports up to 14 reference images in PNG, WebP, or JPEG format (MIME type is detected automatically from file extensions).

compose_image <prompt> <output_image> <source_image>...

Examples:

# Combine two portraits into a group scene
compose_image "Create a group photo in an office setting" output.webp person1.png person2.png

# Merge elements from multiple references
compose_image "Combine these into a collage" collage.webp photo1.jpg photo2.png photo3.webp

Generation Options

Aspect Ratios

1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9

Resolutions

1K (1024px), 2K, 4K

Set these in the generationConfig.imageConfig object:

"imageConfig": {
  "aspectRatio": "16:9",
  "imageSize": "2K"
}

Prompting Tips

Photorealistic: Include camera settings, lighting, lens details

"Shot on 85mm lens, golden hour lighting, shallow depth of field"

Logos: Specify style, colors, typography

"Clean minimalist logo, sans-serif font, monochrome, vector style"

Product shots: Describe studio setup

"Studio-lit, 3-point softbox, polished surface, 45-degree angle"

Stylized art: Name the style explicitly

"Anime style, cel-shading, bold outlines, vibrant colors"

Error Handling

Common issues:

• Missing API key: Ensure GEMINI_API_KEY is exported in your shell environment
• Empty output file: The model may have refused the prompt (safety filters) — check the JSON response for blockReason or finishReason
• Large images for editing: Very large source images may exceed request size limits — resize before encoding
• jq parse errors: The tr sanitization step in extract_image handles this, but if running manually, always sanitize first
• Quota errors (429): Free-tier quotas for gemini-3-pro-image may be 0 — a billing-enabled API key is required

How to Use This Skill

When the user invokes /loreduck:image, interpret $ARGUMENTS as the image generation task. Determine the appropriate workflow based on the request and use the corresponding command: create_image for text-to-image generation, modify_image for editing an existing image, or compose_image for combining multiple images. Always save output images to the current working directory unless the user specifies a different path.