generating-images - SKILL.md Agent Skill

name: generating-images description: Generate images using AI models via OpenRouter API. Supports text-to-image and image-based generation with customizable aspect ratios. Use when the user asks to generate, create, or synthesize images based on text descriptions or reference images.

Generating Images

Use AI models to generate images from text descriptions or reference images via OpenRouter API.

Quick start

Text-to-image generation

Generate an image from a text description:

python scripts/generate.py \
  --prompt "A serene landscape with mountains and a lake at sunset" \
  --output "landscape.png"

Image-to-image generation

Generate a new image based on a reference image:

python scripts/generate.py \
  --reference "girl.png" \
  --prompt "Same art style, but the girl is happily eating delicious braised pork" \
  --output "result.png"

Configuration

Initial setup

Set your OpenRouter API key as environment variable:

export OPENROUTER_API_KEY="${OPENROUTER_API_KEY}"

Aspect ratios

Specify custom aspect ratios with --aspect-ratio:

# Square image (1024x1024)
python scripts/generate.py --prompt "..." --aspect-ratio "1:1"

# Landscape (1344x768)
python scripts/generate.py --prompt "..." --aspect-ratio "16:9"

# Portrait (768x1344)
python scripts/generate.py --prompt "..." --aspect-ratio "9:16"

Supported ratios: 1:1, 16:9, 9:16, 4:3, 3:4

Advanced features

Choose a different model

See MODELS.md for available models and their capabilities.

python scripts/generate.py \
  --model "google/gemini-2.5-flash-image" \
  --prompt "..." \
  --output "result.png"

More examples

See EXAMPLES.md for common use cases and scenarios.

Scripts reference

generate.py

Main image generation script.

Required arguments:

--prompt: Text description of the image to generate
--output: Output file path (e.g., result.png)

Optional arguments:

--reference: Path to reference image for image-to-image generation
--aspect-ratio: Image aspect ratio (default: 1:1)
--model: Model to use (default: from config.json)
--timeout: Request timeout in seconds (default: 60)

Examples:

Text-to-image:

python scripts/generate.py \
  --prompt "Anime style girl drinking coffee" \
  --aspect-ratio "16:9" \
  --output "coffee.png"

Image-to-image:

python scripts/generate.py \
  --reference "style_reference.png" \
  --prompt "Same style, different scene: girl eating ramen" \
  --output "ramen.png"

Error handling

The script handles common errors:

Missing API key: Shows clear error message
Network errors: Retries automatically
Invalid image format: Validates before saving
Missing reference file: Reports file not found

Check script output for detailed error messages.