/**
 * Config service — read, write, backup and rollback for Commander-managed config files.
 *
 * Supports atomic writes (tmp + rename) and auto-backup before every mutation.
 */
export type ConfigSource = "codex-multi-account-accounts" | "anthropic-multi-account-state" | "antigravity-accounts" | "opencode";
export type ConfigFileMeta = {
    source: ConfigSource;
    path: string;
    exists: boolean;
    parseOk: boolean;
    sizeBytes: number;
};
export declare function isValidSource(s: string): s is ConfigSource;
/**
 * List all known config files with metadata.
 */
export declare function listConfigFiles(): Promise<ConfigFileMeta[]>;
/**
 * Read and parse a config file. Throws if missing or unparseable.
 */
export declare function readConfig(source: ConfigSource): unknown;
/**
 * Write config with atomic tmp+rename and auto-backup.
 */
export declare function writeConfig(source: ConfigSource, data: unknown): Promise<{
    backupPath: string;
}>;
/**
 * Rollback config to the latest backup.
 */
export declare function rollbackConfig(source: ConfigSource): Promise<{
    restoredFrom: string;
}>;
export declare class ConfigError extends Error {
    status: number;
    constructor(message: string, status: number);
}