import type { Message } from "../model.js";
export declare function getIsOpened(): boolean | undefined;
export declare function setIsOpened(isOpened: boolean): void;
export declare function saveMessages(workspaceId: string, messages: Message[]): void;
export declare function loadMessages(workspaceId: string): Message[] | undefined;
export declare function clearCachedMessages(workspaceId: string): void;
export declare function getLastActiveAt(workspaceId: string): number | undefined;
export declare function setLastActiveAt(workspaceId: string, timestamp: number): void;
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