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AgentMark generates images with prompts that declare image_config in frontmatter. The image description itself goes in an <ImagePrompt> tag.

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Example configuration

example.prompt.mdx
---
name: image
image_config:
  model_name: dall-e-3
  num_images: 1
  size: 1024x1024
  aspect_ratio: 1:1
  seed: 12345
---

<ImagePrompt>
A futuristic cityscape at sunset with flying cars and neon lights
</ImagePrompt>

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Tags

TagDescription
<ImagePrompt>The text description for image generation. AgentMark reads the contents at compile time and sends it to the model as the prompt.

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Available configuration

PropertyTypeDescriptionRequired
model_namestringThe name of the model to use for image generation.Yes
num_imagesnumberNumber of images to generate.No
sizestringImage dimensions in format WIDTHxHEIGHT (e.g., 1024x1024, 512x512).No
aspect_ratiostringAspect ratio in format WIDTH:HEIGHT (e.g., 1:1, 16:9, 9:16).No
seednumberRandom-number seed for reproducibility.No

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Running an image prompt

See Running prompts → Image generation for the SDK code pattern using Vercel AI SDK’s experimental_generateImage. (The experimental_ prefix is upstream — the API may evolve.)

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