Image Generate Skill

This skill generates images using Doubao Seedream 4.0/4.5/5.0 models.

Trigger Conditions

1. User wants to generate images from text descriptions
2. User wants to create images based on reference images
3. User asks for image generation capabilities

Usage

Environment Variables

Before using this skill, ensure the following environment variables are set:

• ARK_API_KEY or MODEL_IMAGE_API_KEY or MODEL_AGENT_API_KEY: API key for the image generation service
• MODEL_IMAGE_API_BASE: API base URL (optional, has default)
• MODEL_IMAGE_NAME: Model name (optional, has default)

Function Signature

async def image_generate(
    tasks: list[dict],
    timeout: int = 600,
    model_name: str = None,
) -> Dict:

Parameters

tasks (list[dict])

A list of image-generation tasks. Each task is a dict with the following fields:

Required:

• prompt (str): Text description of the desired image(s). Chinese or English both work. To specify the number of images, add "生成N张图片" in the prompt.

Optional:

• size (str): Image size. Two formats:

  • Resolution level: "1K", "2K", "4K"
  • Exact dimensions: "<width>x<height>", e.g., "2048x2048", "2384x1728"
  • Default: "2048x2048"

• response_format (str): Return format. "url" (default, URL expires in 24h) or "b64_json"

• watermark (bool): Add watermark. Default: true

• image (str | list[str]): Reference image(s) as URL or Base64

  • For single image tasks: pass a string (exactly 1 image)
  • For group image tasks: pass an array (2-10 images)

• sequential_image_generation (str): Control group image generation. Default: "disabled"

  • Set to "auto" to generate multiple images

• max_images (int): Maximum number of images for group generation. Range [1, 15]

• tools (list[dict]): Tool configuration, e.g., [{"type": "web_search"}]

• output_format (str): Output format. "png" or "jpeg". Default: "jpeg"

Task Types

The model infers the task type from parameters:

1. Text to Single Image: No image, sequential_image_generation not set or "disabled"
2. Text to Group Images: No image, sequential_image_generation="auto"
3. Single Image to Single Image: image=string, sequential_image_generation not set or "disabled"
4. Single Image to Group Images: image=string, sequential_image_generation="auto"
5. Multi Image to Single Image: image=array (2-10), sequential_image_generation not set or "disabled"
6. Multi Image to Group Images: image=array (2-10), sequential_image_generation="auto"

Return Value

Script Return Info

The image_generate.py script will return these info:

{
    "status": "success" | "error",
    "success_list": [{"name": "image_name", "url": "image_url", "local_path": "local_path"}],
    "error_list": ["image_name"],
    "error_detail_list": [{"task_idx": 0, "error": {...}}]
}

Based on the script return info, the final response returned to the user consists of a description of the image generation task and the image URL(s) and local path(s). You may download the image from the URL, but the image URL should still be provided to the user for viewing and downloading.

Note: the URL is the 'url' in the success_list of script return info.

Final Return Info

You should return three types of information:

1. File format, return the image file (if you have some other methods to send the image file) and the local path of the image, for example: local_path: /root/.openclaw/workspace/skills/image-generate/xxx.png
2. After generation， show list of images with Markdown format, for example：

      ![generated-image-1](https://example.com/image1.png)
      ![generated-image-2](https://example.com/image2.png)

Code Implementation

See scripts/image_generate.py for the full implementation.

Example Usage

# Text to single image
python scripts/image_generate.py -p "A beautiful sunset over the ocean" -s 2048x2048

# Text to group images (generate 3 images)
python scripts/image_generate.py -p "生成3张可爱的小猫图片" -s 2K -g --max-images 3

# Image to image
python scripts/image_generate.py -p "Convert this image to anime style" -i "https://example.com/image.jpg"

# Multi-image to group images
python scripts/image_generate.py -p "Combine these images into a collage" --images "https://example.com/img1.jpg" "https://example.com/img2.jpg" -g --max-images 5

# Use specific model
python scripts/image_generate.py -p "A futuristic city" -m doubao-seedream-5-0-260128

# No watermark
python scripts/image_generate.py -p "A beautiful landscape" --no-watermark

# Output as PNG
python scripts/image_generate.py -p "A portrait photo" --output-format png

Command Line Options

Model Fallback

If you encounter a model-related error (like ModelNotOpen), you can downgrade to these models:

• doubao-seedream-5-0-260128
• doubao-seedream-4-5-251128
• doubao-seedream-4-0-250828

Error Handling

• IF the script raises the error "PermissionError: ARK_API_KEY or MODEL_IMAGE_API_KEY or MODEL_AGENT_API_KEY not found in environment variables", inform the user that they need to provide the ARK_API_KEY or MODEL_IMAGE_API_KEY or MODEL_AGENT_API_KEY environment variable. Write it to the environment variable file in the workspace. If the file already exists, append it to the end. Ensure the environment variable format is correct, make the environment variable effective, and retry the image generation task that just failed.

Notes

• Group image tasks require sequential_image_generation="auto"
• To specify the number of group images, add the count in the prompt (e.g., "生成3张图片")
• Recommended sizes: 2048x2048 or standard aspect ratios for best quality
• URL responses expire in 24 hours