export interface EnvBackupResult {
    success: boolean;
    backupPath?: string;
    error?: string;
}
export interface EnvRestoreResult {
    success: boolean;
    mergedVariables?: number;
    error?: string;
}
/**
 * Creates a timestamped backup of the .env file
 */
export declare const backupEnvFile: () => Promise<EnvBackupResult>;
/**
 * Formats env variables back to .env file format
 */
export declare const formatEnvContent: (envMap: Map<string, string>) => string;
/**
 * Merges user env variables with template variables, preferring user values
 */
export declare const mergeEnvFiles: (userBackupPath: string, templatePath: string) => Promise<Map<string, string>>;
/**
 * Restores .env file from backup, merging with any new template variables
 */
export declare const restoreEnvFile: (backupPath?: string) => Promise<EnvRestoreResult>;
/**
 * Lists all .env backup files
 */
export declare const listEnvBackups: () => Promise<string[]>;
/**
 * Cleans up old .env backup files (keeps last 5)
 */
export declare const cleanupOldBackups: () => Promise<void>;