import { Message } from "../components/ChatConversation/ChatWindow";
/**
 * Requests an LLM-generated title summarising a conversation. For
 * authenticated users the server persists the title on the chat; for guests
 * the caller is responsible for storing the returned title locally. Returns
 * an empty string on failure so callers can keep the existing title.
 */
export declare const generateChatTitle: (chatId: string, chatHistory: Message[]) => Promise<string>;