import type { ChatAttachment } from '../chatAttachments';
/**
 * Appends attachment metadata context to message content so chat models can see uploaded file URLs.
 *
 * @param {string} messageContent - The original message content.
 * @param {ReadonlyArray<ChatAttachment>} attachments - The attachments to append.
 * @returns {string} The updated message content.
 * @public exported from `@promptbook/core`
 */
export declare function appendChatAttachmentContext(messageContent: string, attachments: ReadonlyArray<ChatAttachment>): string;
