diff --git a/src/components/ErrorBoundary.tsx b/src/components/ErrorBoundary.tsx
index 52a5f91..ffa1f37 100644
--- a/src/components/ErrorBoundary.tsx
+++ b/src/components/ErrorBoundary.tsx
@@ -11,17 +11,7 @@ interface ErrorBoundaryProps {
   fallback?: ReactNode;
 }
 
-interface ErrorMessage {
-  type: 'mkstack-error';
-  error: {
-    message: string;
-    stack?: string;
-    componentStack?: string;
-    url: string;
-    timestamp: string;
-    userAgent: string;
-  };
-}
+
 
 export class ErrorBoundary extends Component<ErrorBoundaryProps, ErrorBoundaryState> {
   constructor(props: ErrorBoundaryProps) {
@@ -43,26 +33,6 @@ export class ErrorBoundary extends Component<ErrorBoundaryProps, ErrorBoundarySt
   componentDidCatch(error: Error, errorInfo: ErrorInfo) {
     console.error('Error caught by ErrorBoundary:', error, errorInfo);
 
-    // Send error details via postMessage for iframe embedding
-    const errorMessage: ErrorMessage = {
-      type: 'mkstack-error',
-      error: {
-        message: error.message,
-        stack: error.stack || undefined,
-        componentStack: errorInfo.componentStack || undefined,
-        url: window.location.href,
-        timestamp: new Date().toISOString(),
-        userAgent: navigator.userAgent,
-      },
-    };
-
-    // Send to parent window if in iframe, or broadcast to all
-    if (window.parent !== window) {
-      window.parent.postMessage(errorMessage, '*');
-    } else {
-      window.postMessage(errorMessage, '*');
-    }
-
     this.setState({
       error,
       errorInfo,
diff --git a/src/test/ErrorBoundary.test.tsx b/src/test/ErrorBoundary.test.tsx
index 14dd33f..3f49427 100644
--- a/src/test/ErrorBoundary.test.tsx
+++ b/src/test/ErrorBoundary.test.tsx
@@ -2,11 +2,7 @@ import { render, screen } from '@testing-library/react';
 import { describe, it, expect, vi } from 'vitest';
 import { ErrorBoundary } from '@/components/ErrorBoundary';
 
-// Mock window.postMessage
-const postMessageMock = vi.fn();
-Object.defineProperty(window, 'postMessage', {
-  value: postMessageMock,
-});
+
 
 // Test component that throws an error
 const ThrowError = ({ shouldThrow }: { shouldThrow: boolean }) => {
@@ -43,33 +39,7 @@ describe('ErrorBoundary', () => {
     consoleSpy.mockRestore();
   });
 
-  it('sends error details via postMessage', () => {
-    // Suppress console.error for this test
-    const consoleSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
-    postMessageMock.mockClear();
 
-    render(
-      <ErrorBoundary>
-        <ThrowError shouldThrow={true} />
-      </ErrorBoundary>
-    );
-
-    expect(postMessageMock).toHaveBeenCalledWith(
-      expect.objectContaining({
-        type: 'mkstack-error',
-        error: expect.objectContaining({
-          message: 'Test error',
-          stack: expect.any(String),
-          url: expect.any(String),
-          timestamp: expect.any(String),
-          userAgent: expect.any(String),
-        }),
-      }),
-      '*'
-    );
-
-    consoleSpy.mockRestore();
-  });
 
   it('uses custom fallback when provided', () => {
     const customFallback = <div>Custom error message</div>;