export interface SessionSnapshot {
    sessionId: string;
    taskId: string;
    step: number;
}
export interface SessionRotation {
    sessionId: string;
    taskId: string;
}
/**
 * Client-side session state for the Hollow Connector.
 *
 * One session_id per connector process lifetime by default. Step counter is
 * monotonic within the session. Contract rotation triggers:
 *   - 410 session_expired   → rotate session_id AND task_id, step resets to 0
 *   - 400 step_out_of_order → rotate task_id only (same session_id), step resets
 *
 * The connector does not infer "task boundaries" from MCP call patterns in M1 —
 * every snapshot is attributed to the single running task_id until a rotation
 * trigger fires.
 */
export declare class SessionState {
    private sessionId;
    private taskId;
    private step;
    private readonly newId;
    constructor(opts?: {
        newId?: () => string;
    });
    /** Returns a snapshot of the current state AND advances the step counter. */
    consume(): SessionSnapshot;
    /** Peek without advancing (useful for logs). */
    peek(): SessionSnapshot;
    /** Rotate both session + task (contract §7.2 / 410 session_expired). */
    rotateSession(): SessionRotation;
    /** Rotate task only (contract §7.2 / 400 step_out_of_order). */
    rotateTask(): SessionRotation;
}