/**
 * Extracts embedding-ready text or Markdown from upload formats.
 *
 * Text and CSV are handled inline (CSV uses a RAG-optimized format that
 * denormalizes headers into every row). All other formats (PDF, DOCX, XLSX,
 * PPTX, HTML, RTF, EPUB, etc.) are delegated to the `DocumentExtractor`
 * extension contract, which owns kreuzberg, Markdown extraction, and Worker
 * isolation on Deno.
 *
 * @example
 * ```ts
 * const markdown = await loadUpload(buffer, "application/pdf");
 * ```
 */
export declare function loadUpload(buffer: ArrayBuffer, mimeType: string): Promise<string>;
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