import { Message } from '../types.js';
/**
 * Processes a user message with the given context strings and optional system message content.
 * It retrieves the chat configuration, message history, adds context messages and system messages to the chat log,
 * sends the user message to the AI, and updates the message history with the user message and AI response.
 *
 * @param {Message} userMessage - The user message to be processed.
 * @param {string[]} contexts - Optional array of context strings to be included in the chat.
 * @param {string} systemMessageContent - Optional system message content to be included in the chat.
 * @returns {Promise<Message>} - A Promise that resolves to the AI-generated response message.
 */
export declare function chat(userMessage: Message, contexts?: string[], systemMessageContent?: string): Promise<Message>;