import type { Response, ResponseStreamEvent } from "../../resources/responses/responses.js";
/** A transport keepalive event that leaves the accumulated response unchanged. */
type ResponseKeepAliveEvent = {
    /** Identifies a non-content keepalive event emitted by the response transport. */
    type: 'keepalive';
    /** Monotonically ordered event sequence number assigned by the response stream. */
    sequence_number: number;
};
/**
 * Applies a streaming event to a response snapshot.
 *
 * Always use the returned snapshot. Incremental events update the supplied snapshot
 * in place, while response lifecycle events return a detached replacement. Event
 * payloads are cloned, so retaining or replaying the raw events is safe.
 */
export declare function accumulateResponse(event: ResponseStreamEvent | ResponseKeepAliveEvent, snapshot?: Response): Response;
export {};
//# sourceMappingURL=ResponseAccumulator.d.ts.map