/**
 * Package Type Resolver
 *
 * Resolves module type from package.json
 * Supports Node.js "type" field for .js file interpretation
 */
/**
 * Determine if a .js file should be treated as ESM
 *
 * Logic:
 * - .mjs → always ESM
 * - .cjs → always CommonJS
 * - .mts → always ESM (TypeScript)
 * - .cts → always CommonJS (TypeScript)
 * - .js → depends on nearest package.json "type" field
 * - .ts → depends on nearest package.json "type" field (when used in runtime)
 *
 * @param filePath - Absolute file path
 * @returns 'esm' | 'commonjs'
 */
export declare function resolveModuleType(filePath: string): 'esm' | 'commonjs';
/**
 * Clear cache (useful for testing)
 */
export declare function clearPackageTypeCache(): void;
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