export interface StoredCredentials {
    apiBaseUrl: string;
    key: string;
    username: string;
    workerId?: string;
    label?: string;
    createdAt: string;
}
export declare function credentialsPath(): string;
export declare function saveCredentials(creds: StoredCredentials): void;
export declare function loadCredentials(): StoredCredentials | null;
export declare function clearCredentials(): boolean;
/**
 * Resolve the active worker key: WORKER_API_KEY env wins, else the stored
 * credential file. Returns null if neither is present.
 */
export declare function resolveWorkerKey(): string | null;
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