import type { ServerMessage } from "./adapter.js";
export declare function appendMessage(agentDir: string, branch: string, msg: ServerMessage): void;
export declare function loadHistory(agentDir: string, branch: string): ServerMessage[];
export declare function deleteHistory(agentDir: string, branch: string): void;
/** Count messages for a branch (to decide when to re-summarize) */
export declare function getMessageCount(agentDir: string, branch: string): number;
/** Summarize a branch's chat history using a lightweight query() call */
export declare function summarizeHistory(agentDir: string, branch: string): Promise<string>;