import type { ExportData, DiffResult, MetaChanges } from "./types.js";
/** Compare two exports and classify changes.
 *  Optional labels override the derived dates (useful when the storage key
 *  differs from the latest dateOfService, e.g. round key = earliest date). */
export declare function diffExports(from: ExportData, to: ExportData, fromLabel?: string, toLabel?: string): DiffResult;
/** Compare non-result metadata between two exports. Only populates fields that changed. */
export declare function diffMeta(from: ExportData | null, to: ExportData): MetaChanges;
/** Build human-readable summary lines from diff results and meta changes.
 *  Returns empty array if nothing changed (no file should be written). */
export declare function buildChangeSummary(diff: DiffResult | null, meta: MetaChanges, context?: {
    totalResults: number;
    roundCount: number;
    previousRoundCount?: number;
}): string[];
/** Detect changes between previous aggregate and fresh API data, save notification if any.
 *  Returns the summary lines (empty if nothing changed).
 *  Note: "disappeared" markers are suppressed because the API's /results-report returns
 *  only current results — comparing against the aggregate of all historical rounds would
 *  produce false disappearances for markers not in the latest panel. Use fh_changes for
 *  accurate round-to-round disappearance tracking. */
export declare function detectAndSaveChanges(previousData: ExportData | null, currentData: ExportData, savedDates: string[], previousRoundCount?: number): Promise<string[]>;