For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.

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import { ContentPartImage } from "@openrouter/sdk/models";
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let value: ContentPartImage = {
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  imageUrl: {
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    url: "https://example.com/image.png",
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  },
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  type: "image_url",
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};