import type { UserContent } from "ai";
import type { Attachment, Message } from "#compiled/chat/index.js";
/** Returns model-visible Linq content, or `undefined` for blank messages. */
export declare function linqInboundContent(message: Message): string | UserContent | undefined;
/**
 * Rebuilds a Linq attachment's download after the message crosses the queue.
 * The Linq adapter downloads from its CDN URL without credentials but has no
 * `rehydrateAttachment`, so this does the same, stopping at the upload limit.
 */
export declare function rehydrateLinqAttachment(attachment: Attachment): Attachment;