import { Settings } from './types.js';
type ConfigSource = 'env' | 'user' | 'package';
/**
 * Load settings from JSON file with environment variable substitution.
 */
export declare function loadSettings(configPath?: string): Settings;
/**
 * Save settings to JSON file.
 */
export declare function saveSettings(settings: Settings, configPath?: string): void;
/**
 * Get the default config path.
 */
export declare function getDefaultConfigPath(): string;
/**
 * Get the user config directory path.
 */
export declare function getUserConfigDir(): string;
/**
 * Get the user config file path.
 */
export declare function getUserConfigPath(): string;
/**
 * Initialize user config directory and create default settings if not exists.
 * Returns the path to the user config file.
 */
export declare function initUserConfig(): string;
/**
 * Get all config paths for debugging.
 */
export declare function getConfigPaths(): {
    env?: string;
    user: string;
    package: string;
    active: string;
    source: ConfigSource;
};
export {};
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