export declare const PI_INITIAL_TURN_TIMEOUT_MS = 300000;
export declare const PI_HANDLED_TASK_GRACE_MS = 60000;
/** Id of the initial task prompt; later steer, follow-up and operator commands carry none. */
export declare const PI_TASK_PROMPT_ID = "fabric-task";
/** Tracks only the ordinary task prompt, never later steering or operator commands. */
export declare class PiTaskPromptLifecycle {
    #private;
    private readonly fail;
    constructor(fail: (error: string) => void);
    sent(id: string): void;
    observe(event: Record<string, unknown>): void;
    /** The child is gone, so a handled task can no longer start a turn: fail it now. */
    childExited(): void;
    dispose(): void;
}
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