import type { SinkRecord } from '../types.js';
type Format = 'csv' | 'json' | 'jsonl';
declare function detectFormat(filePath: string): Format;
declare function parseInput(filePath: string): SinkRecord[];
declare function formatOutput(records: SinkRecord[], format: Format): string;
/**
 * Convert a file between formats.
 */
export declare function drain(inputPath: string, outputPath: string, targetFormat?: Format): {
    records: number;
    format: Format;
};
export { parseInput, formatOutput, detectFormat };