export declare const LLM_MISSING_CREDENTIALS_ERROR_CODE = "missing_credentials";
export declare const CREDENTIAL_STORE_UNAVAILABLE_ERROR_CODE = "credential_store_unavailable";
export declare const LLM_MISSING_CREDENTIALS_MESSAGE = "No LLM provider is connected. Open Settings > Agent > AI providers, then use Builder.io (free tier available) or add a provider key.";
export declare const GATEWAY_UNAVAILABLE_VISITOR_MESSAGE = "AI features aren't available on this site right now.";
export declare function gatewayVisitorFacingError(errorCode?: string): {
    error: string;
    errorCode?: string;
};
export declare const LLM_CREDENTIAL_KEYS: ReadonlySet<string>;
export declare function isLlmCredentialError(error: unknown, errorCode?: string | null): boolean;
export declare function formatLlmCredentialErrorMessage(options?: {
    agentName?: string;
    visitorFacing?: boolean;
}): string;
export declare function userFacingLlmCredentialError(error: unknown, options?: {
    agentName?: string;
    visitorFacing?: boolean;
}): string | null;