CopilotKit/CopilotKit · error

[A2UI] processMessages error:

Error message

[A2UI] processMessages error:

What it means

Error "[A2UI] processMessages error:" thrown in CopilotKit/CopilotKit.

Source

Thrown at packages/a2ui-renderer/src/react-renderer/core/A2UIProvider.tsx:97

    );
  }
  const processor = processorRef.current;

  // Version counter for triggering re-renders
  const [version, setVersion] = useState(0);

  // Error state for graceful error handling
  const [error, setError] = useState<string | null>(null);

  // Create stable actions object once - stored in ref, never changes
  const actionsRef = useRef<A2UIActions | null>(null);
  if (!actionsRef.current) {
    actionsRef.current = {
      processMessages: (messages: Array<Record<string, unknown>>) => {
        try {
          processor.processMessages(messages as any[]);
        } catch (err) {
          console.warn("[A2UI] processMessages error:", err);
          setError(err instanceof Error ? err.message : String(err));
          return;
        }
        setError(null);
        setVersion((v) => v + 1);
      },

      dispatch: (message: any) => {
        if (onActionRef.current) {
          onActionRef.current(message);
        }
      },

      getSurface: (surfaceId: string) => {
        return processor.model.getSurface(surfaceId);
      },

      clearSurfaces: () => {

View on GitHub (pinned to 68fbe97d87)

When it happens

Trigger: Thrown at packages/a2ui-renderer/src/react-renderer/core/A2UIProvider.tsx:97 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of CopilotKit/CopilotKit@68fbe97d87 (2026-08-27). Data as JSON: /api/errors/4e33a401fc018712. Report an issue: GitHub.