Function buildStreamErrorEventData

src/node/services/utils/sendMessageError.ts:167–179

(
  error: SendMessageError,
  options?: { acpPromptId?: string }
)

 * Build a stream-error payload for pre-stream failures so the UI can surface them immediately.
 */
export const buildStreamErrorEventData = (
  error: SendMessageError,
  options?: { acpPromptId?: string }
): StreamErrorPayload => {
  const { message, errorType } = formatSendMessageError(error);
  const messageId = createAssistantMessageId();
  return {
    messageId,
    error: message,
    errorType,
    acpPromptId: options?.acpPromptId,
  };
};