type LastSessionStorage = Pick<Storage, "getItem" | "setItem" | "removeItem">;
export declare function lastSessionMemoryId(subjectId: string, workspaceId: string): string;
export declare function readLastSessionId(memoryId: string, storage?: LastSessionStorage | null): string | null;
export declare function rememberLastSessionId(memoryId: string, sessionId: string, storage?: LastSessionStorage | null): void;
/** Forget the remembered session; with `sessionId`, only while it is still that one. */
export declare function forgetLastSessionId(memoryId: string, sessionId?: string, storage?: LastSessionStorage | null): void;
/** The new-session page is now the open view: Back from Settings returns to it. */
export declare function useForgetLastSession(subjectId: string, workspaceId: string): void;
/**
 * Remembers the session route's session once it opens and forgets it once it
 * is gone (not found or no longer accessible), so Back can't lead there again.
 * When the Back link itself brought the person to a gone session, calls
 * `leave` (open a new session instead of a not-found page) and returns true
 * so the route can skip that page. Transient load failures change nothing.
 */
export declare function useSessionRouteMemory(input: {
    subjectId: string;
    workspaceId: string;
    sessionId: string;
    openedSessionId: string | null;
    loadError: unknown;
    restoredSessionId: string | undefined;
    leave: () => void;
}): boolean;
export {};