import { BaseListChatMessageHistory } from "@langchain/core/chat_history";
import { type BaseMessage } from "@langchain/core/messages";
import type { FlairClient } from "@tpsdev-ai/flair-client";
/**
 * LangChain `BaseListChatMessageHistory` adapter backed by Flair memory.
 *
 * Each chat message is stored as a single Flair memory:
 *   - content: JSON.stringify(StoredMessage)
 *   - subject: the composed chat-session subject
 *   - tags: ["n8n-chat", `role:<type>`]
 *   - type: "session"
 *   - durability: "ephemeral"
 *
 * `getMessages()` reads memories filtered by subject and reconstructs the
 * BaseMessage[] in createdAt-ascending order. Order is computed client-side
 * from the createdAt timestamp because Memory.list does not yet expose a
 * server-side sort param (tracked as the `order` extension in q3qf §6).
 *
 * The `windowK` constructor argument bounds the number of memories fetched
 * per `getMessages()` call: each turn is two messages (user + AI), so we
 * fetch up to `windowK * 2` to cover a windowing wrapper that keeps the
 * last K turns.
 */
export declare class FlairChatMessageHistory extends BaseListChatMessageHistory {
    private readonly client;
    private readonly subject;
    private readonly windowK;
    lc_namespace: string[];
    constructor(client: FlairClient, subject: string, windowK?: number);
    getMessages(): Promise<BaseMessage[]>;
    addMessage(message: BaseMessage): Promise<void>;
    addMessages(messages: BaseMessage[]): Promise<void>;
    clear(): Promise<void>;
}