/** Options for {@link fileBlob}. */
export interface FileBlobOptions {
    /** MIME type stamped on the Blob (becomes the multipart part's Content-Type). */
    type?: string;
    /** Reject (before any upload) when the file is larger than this many bytes. */
    maxBytes?: number;
    /** Friendly name for the size-limit error message (e.g. "Image"). */
    label?: string;
}
/**
 * A **file-backed** `Blob` for streaming multipart uploads. Backed by the file
 * on disk via `fs.openAsBlob`, so the bytes are NOT read into memory — `fetch`
 * streams them from disk as it sends the request body. Use in place of
 * `new Blob([readFileSync(path)])` when building `FormData` for an upload.
 *
 * @throws if the file can't be opened, or (when `maxBytes` is set) is too large.
 */
export declare function fileBlob(path: string, opts?: FileBlobOptions): Promise<Blob>;
/**
 * Read the first `bytes` of a file (for magic-byte / header sniffing — image
 * dimensions, file-type detection) WITHOUT loading the whole file. Returns only
 * as many bytes as were actually read (a short file yields a short buffer).
 */
export declare function readFileHead(path: string, bytes: number): Promise<Buffer>;
export * from './output.js';
//# sourceMappingURL=index.d.ts.map