export type MultipartBody = string | Uint8Array | ArrayBuffer | ArrayBufferView | Blob | ReadableStream<Uint8Array>;
export type MultipartHeadersInit = Headers | Readonly<Record<string, string>> | ReadonlyArray<readonly [string, string]>;
export interface MultipartPart {
    readonly headers?: MultipartHeadersInit;
    readonly body: MultipartBody;
}
export interface MultipartResponseOptions {
    /** Boundary token. If omitted, a cryptographically random boundary is generated. */
    readonly boundary?: string;
    /** Multipart subtype. Defaults to `mixed`; use `form-data` when parts carry form names. */
    readonly subtype?: "mixed" | "form-data";
    /** HTTP response status. Defaults to 200. */
    readonly status?: number;
}
/**
 * Stream a multipart response without buffering the parts. The part headers and bodies are emitted
 * as supplied; this helper deliberately does not persist, inspect, or serialize payloads.
 */
export declare function multipartResponse(parts: Iterable<MultipartPart> | AsyncIterable<MultipartPart>, options?: MultipartResponseOptions): Response;
//# sourceMappingURL=multipart.d.ts.map