/**
 * Token storage cho 1 OAuth account.
 *
 * Lưu vào `~/.redai/oauth/<provider>/<account>.json` (chmod 600).
 * Đa số provider (Claude/Codex/Gemini) chỉ có 1 account → file `default.json`.
 * Multi-account (M4) thêm folder con + tên account.
 */
export interface OAuthTokenStorage {
    /** Provider type: claude | codex | gemini | ... */
    type: string;
    /** Account identifier mặc định 'default'. */
    account: string;
    /** OAuth access_token. */
    accessToken: string;
    /** OAuth refresh_token (long-lived). */
    refreshToken: string;
    /** Optional JWT id_token (Anthropic không trả nhưng Google CLI có). */
    idToken?: string;
    /** Email account (informational, hiển thị trong status). */
    email?: string;
    /** Unix ms khi access_token hết hạn. */
    expiresAt: number;
    /** Unix ms lần cuối refresh. */
    lastRefresh: number;
    /** Free-form metadata (provider-specific). */
    metadata?: Record<string, unknown>;
}
export declare function oauthDir(provider: string): string;
export declare function oauthFilePath(provider: string, account?: string): string;
export declare function saveToken(provider: string, token: OAuthTokenStorage): void;
export declare function loadToken(provider: string, account?: string): OAuthTokenStorage | null;
export declare function listAccounts(provider: string): string[];
export declare function deleteToken(provider: string, account?: string): void;
export declare function listProvidersWithLogin(): string[];