import type { SpreadsheetPackageScanResult } from './work-spreadsheet-package-scan-worker-protocol';
/**
 * Decompresses and classifies worksheet XML away from the UI thread. A null
 * result preserves the existing main-thread parser as a compatibility path.
 */
export declare function scanSpreadsheetPackageInWorker(bytes: ArrayBuffer, signal?: AbortSignal, onFastPathCandidate?: () => void): Promise<SpreadsheetPackageScanResult | null>;