/** Safe GitHub transport metadata suitable for user-facing structured error output. */
export declare function serializeGitHubRequestErrorDetails(err: unknown): {
    rateLimit?: {
        resource: string;
        limit: number;
        remaining: number;
        used?: number | undefined;
        resetAt: number;
    } | undefined;
    retryAfterSeconds?: number | undefined;
    credential?: string | undefined;
} | undefined;
export declare function formatCliError(err: unknown): string;