import type { LanguageModelV4GenerateResult } from "@ai-sdk/provider";
export declare const GENERATE_ENVELOPE_FIELDS: readonly ["content", "finishReason", "providerMetadata", "request", "response", "usage", "warnings"];
export declare const GENERATE_CONTENT_MUTATION_FIELDS: readonly ["approvalId", "data", "dynamic", "filename", "id", "input", "isError", "kind", "mediaType", "preliminary", "providerExecuted", "providerMetadata", "result", "sourceType", "text", "title", "toolCallId", "toolName", "type", "url"];
export declare const MAX_VALIDATOR_MUTATION_FIELDS = 200000;
export interface ValidatorMutationTarget {
    keys: string[];
    value: object;
}
export declare function validatorMutationKeys(value: object, remainingFields: number): string[] | undefined;
export declare function validatorOwnDataValue(value: object, key: string | number): unknown;
export declare function consumeValidatorArrayItemPromises(value: unknown, maximum: number, itemFields: readonly string[]): void;
export declare function consumeNestedValidatorInputPromiseMutations(input: LanguageModelV4GenerateResult): void;
export declare function captureValidatorMutationTargets(root: LanguageModelV4GenerateResult): ValidatorMutationTarget[];
export declare function consumeCapturedValidatorMutationPromises(targets: ValidatorMutationTarget[]): void;
export declare class InvalidProviderModelError extends Error {
    readonly code = "invalid_provider_model";
    constructor(message: string);
}
/** A successful generate call must contain something usable by the caller. */
export declare function hasOutputContent(result: LanguageModelV4GenerateResult): boolean;