import type { SessionUpdate, UserUpdate } from "./types";
export type SavedUser = UserUpdate;
export type SavedSessionContext = SessionUpdate;
export type StoredSession = {
    sessionId: string | null;
    user: SavedUser | null;
    sessionContext: SavedSessionContext | null;
};
export declare function loadSessionState(): StoredSession | null;
export declare function saveSessionState(state: StoredSession): void;
export declare function clearSessionState(): void;
export declare function mergeUser(prev: SavedUser | null, input: UserUpdate): SavedUser;
export declare function mergeSessionContext(prev: SavedSessionContext | null, input: SessionUpdate): SavedSessionContext;
export declare function setSessionId(sessionId: string): void;
export declare function clearSessionId(): void;
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