export type ExecutionAbortReason = "idle-timeout" | "signal";
export interface IdleTimeoutWatchdogOptions {
    timeoutMs?: number;
    signal?: AbortSignal;
    hardTimeoutGraceMs: number;
    onAbort?: (reason: ExecutionAbortReason) => void;
}
export declare class IdleTimeoutWatchdog {
    #private;
    constructor(options: IdleTimeoutWatchdogOptions);
    get abortedBySignal(): boolean;
    get hardTimeoutPromise(): Promise<"hard-timeout">;
    get signal(): AbortSignal;
    get timedOut(): boolean;
    touch(): void;
    dispose(): void;
}
export declare function formatIdleTimeoutMessage(timeoutMs?: number): string;