export type CachedSession = {
    token: string;
    /** ISO timestamp when the token expires (2 days from issue). */
    expiresAt: string;
    /** Email of the user who authorized (if available). */
    email?: string;
};
/** Persist the auth token to the `session` section of the unified config. */
export declare function writeSession(session: CachedSession): void;
/**
 * Read the cached session, returning it only if the token is still
 * valid (not yet expired). Returns undefined on any error.
 */
export declare function readSession(): CachedSession | undefined;