import type { Account } from "./account.js";
export interface AccountConfigKey {
    platform: string;
    account_id: string;
}
/** 拒绝无法形成稳定配置键的账号输入，避免扩展构造阶段处理畸形身份。 */
export declare function assertAccountIdentity(config: unknown): asserts config is Account.Config;
export declare function assertAccountIdentifier(field: string, value: unknown): asserts value is string;
/** 解析 `{platform}.{account_id}`，账号 ID 可继续包含点号。无点号的宿主字段返回 null。 */
export declare function parseAccountConfigKey(key: string): AccountConfigKey | null;