export type SmiRunner = () => string;
/**
 * GPU count for this machine, or `null` when it cannot be established.
 *
 * `null` means "unknown", NOT "zero GPUs" — the server keeps its configured value in that case,
 * so a missing nvidia-smi or a driver hiccup never silently takes a machine out of GPU dispatch.
 * `nvidia-smi --query-gpu=count` prints the host total once per GPU, so only the first line matters.
 */
export declare function detectGpuCount(run?: SmiRunner): number | null;
export declare function resetGpuCountCacheForTesting(): void;