export interface Credentials {
    apiKey: string;
    email: string;
    createdAt: string;
}
/** The durable per-machine id. Reuses session.ts rather than minting a second. */
export declare function installId(): string | undefined;
export declare function readCredentials(): Credentials | null;
export declare function writeCredentials(c: Credentials): void;
export declare function clearCredentials(): void;