import type { LanguageModelV4StreamPart } from "@ai-sdk/provider";
import type { StreamJsonBudget } from "./stream-part-json.js";
export declare function validStreamFileData(value: unknown): boolean;
export declare function validUsageNumber(value: unknown): boolean;
export declare function validOptionalDate(value: unknown): boolean;
export declare function validOptionalString(value: unknown): boolean;
export declare function validOptionalBoolean(value: unknown): boolean;
export declare function validStreamWarningString(value: unknown): boolean;
export declare function validWarning(value: unknown): boolean;
export declare function validFinishPart(part: LanguageModelV4StreamPart): boolean;
export declare function validKnownStreamPartShape(part: LanguageModelV4StreamPart): boolean;
export declare function consumeStreamMetadataStrings(part: LanguageModelV4StreamPart, budget: StreamJsonBudget): void;