/** Extract visible text from a provider assistant message. */
export declare function extractAssistantText(content: unknown): string;
/** True when retrying a model request may recover from a transport or upstream 5xx failure. */
export declare function isTransientProviderErrorMessage(message: string): boolean;
export declare function stripCodeFences(raw: string): string;
export declare function getAssistantMessageErrorReason(message: unknown): string | null;