/**
 * Excel (.xlsx) schema round-trip: first row = headers ↔ DeukPack AST.
 * Optional dependency: xlsx (SheetJS). Install for Excel support.
 */
import { DeukPackAST, DeukPackStruct } from '../types/DeukPackTypes';
/**
 * Parse Excel file: first row of first sheet = column names.
 */
export declare function parseExcelFileToAst(filePath: string, sourceFile?: string): DeukPackAST;
/**
 * Emit Excel file with one sheet; first row = struct field names.
 */
export declare function emitExcelFromStruct(struct: DeukPackStruct, outputPath: string): void;
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