export declare class EmptyModelResponseError extends Error {
    readonly code = "empty_model_response";
    constructor();
}
export declare class InvalidModelResponseError extends Error {
    readonly code = "invalid_model_response";
    constructor(message: string);
}
export declare class ValidatorContractError extends Error {
    readonly code = "validator_contract_error";
    constructor(message: string, cause?: unknown);
}
export declare const CONTENT_TYPES: Set<string>;
export declare const FINISH_REASONS: Set<string>;
export declare const MAX_GENERATE_CONTENT_PARTS = 10000;
export declare const MAX_GENERATE_JSON_CONTAINERS = 50000;
export declare const MAX_GENERATE_JSON_CHARACTERS = 4194304;
export declare const MAX_GENERATE_METADATA_CHARACTERS = 4194304;
export declare const MAX_METADATA_FIELD_LENGTH = 65536;
export declare const MAX_RESULT_WARNINGS = 1024;
export declare const MAX_RESULT_WARNING_CHARS = 1048576;
export declare const MAX_RESULT_WARNING_FIELD_LENGTH = 65536;
export declare const MAX_RESULT_HEADERS = 1024;
export declare const MAX_RESULT_HEADER_LENGTH = 65536;
export declare const MAX_RESULT_HEADER_CHARS = 1048576;
export declare function validUsageNumber(value: unknown): boolean;
export declare function validOptionalBoolean(value: unknown): boolean;
export declare function validOptionalString(value: unknown): boolean;
export declare function validWarningString(value: unknown): boolean;
export declare function validOptionalWarningString(value: unknown): boolean;
export declare function validWarning(value: unknown): boolean;
export declare function validResultHeaders(value: unknown): boolean;
export declare function validGenerateMetadata(result: Record<string, unknown>): boolean;
export declare function validateUsage(value: unknown): boolean;
export declare function validGeneratedFileData(value: unknown): boolean;
export declare function validContentPart(record: Record<string, unknown>): boolean;
export declare function validateContent(value: unknown): string | undefined;
export declare function validateGenerateEnvelope(value: unknown): string | undefined;