/** Observability hooks must never affect routing or create unhandled rejections. */
export declare function runObservabilityHook(hook: () => unknown): void;
/** Isolate an attempt hook and consume Promise mutations on its bounded payload. */
export declare function runAttemptObservabilityHook<T extends object>(payload: T, hook: (payload: T) => unknown): void;
/** Isolate an error hook and consume Promise mutations on its bounded payload. */
export declare function runErrorObservabilityHook<T extends object>(payload: T, hook: (payload: T) => unknown): void;