type OwnedChild = {
    readonly pid: number;
    readonly exitCode: number | null;
    readonly signalCode: string | number | null;
    kill(signal: "SIGKILL"): unknown;
};
type GroupSignal = (pid: number, signal: "SIGKILL" | 0) => unknown;
/** Capture identity immediately after spawn; Bun may change pid after reaping. */
export declare function capturePreparationProcess(child: OwnedChild, platform?: NodeJS.Platform, signalGroup?: GroupSignal): {
    kill(): void;
    groupExited(): boolean | undefined;
};
export {};