import type { Duplicate } from '../config/types.js';
/**
 * Scan a .env-like file for duplicate keys.
 * - Ignores empty lines and comments (#...)
 * - Splits on first '='
 * - Trims the key
 * - Returns keys that appear more than once, with counts
 * @param filePath - Path to the .env file to scan
 * @returns An array of objects representing duplicate keys and their counts.
 */
export declare function findDuplicateKeys(filePath: string): Array<Duplicate>;
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