export interface SessionTurnManagerOptions<TState> {
    open: () => Promise<TState>;
    close?: (state: TState | null) => Promise<void> | void;
    getInitial?: () => Promise<TState>;
    maxTurns?: number;
    recovery?: {
        turnsOnActiveSession?: unknown;
    } | null;
    getSessionId?: (state: TState) => string | null | undefined;
    onRefresh?: (event: {
        turnLimit: number;
        previous: TState | null;
    }) => void;
    onRecover?: (event: {
        previous: TState | null;
    }) => void;
    onCloseError?: (error: unknown, state: TState | null) => void;
}
export interface SessionTurnManager<TState> {
    getForTurn(): Promise<TState>;
    recoverForRetry(): Promise<TState>;
    refreshNow(): Promise<TState>;
    getActive(): TState | null;
    getStarted(): TState[];
    getRecoverySnapshot(): {
        sessionId: string;
        turnsOnActiveSession: number;
    } | null;
}
export declare function createSessionTurnManager<TState>(options: SessionTurnManagerOptions<TState>): SessionTurnManager<TState>;
export declare function normalizeSessionTurnLimit(value: unknown): number;