import type { JSONValue, LanguageModelV4StreamPart } from "@ai-sdk/provider";
export declare function isReasoningStreamPart(part: LanguageModelV4StreamPart): boolean;
export declare function isTextStreamPart(part: LanguageModelV4StreamPart): boolean;
export declare function detailsSince(details: readonly JSONValue[], count: number): readonly JSONValue[];
export declare function snapshotMiddlewareResult(value: unknown, name: string): Record<string, unknown>;
export declare function discardReasoningStream(stream: object): void;
export declare function captureMiddlewareHookArgs(value: unknown): Record<string, unknown>;