/**
 * Configuration Loader for rill-check
 * Loads and validates .rill-check.json configuration files.
 */
import type { CheckConfig } from './types.js';
/**
 * Create default configuration with all rules enabled.
 * Returns configuration where all known rules are set to 'on'.
 */
export declare function createDefaultConfig(): CheckConfig;
/**
 * Load configuration from .rill-check.json in the specified directory.
 *
 * @param cwd - Directory to search for configuration file
 * @returns CheckConfig object, or null if file not found
 * @throws Error with "Invalid configuration: {reason}" if JSON is invalid [EC-3]
 * @throws Error with "Invalid configuration: unknown rule {code}" if unknown rule [EC-4]
 */
export declare function loadConfig(cwd: string): CheckConfig | null;