diff --git a/web/src/app/error.tsx b/web/src/app/error.tsx
index 9a280f0..30100c9 100644
--- a/web/src/app/error.tsx
+++ b/web/src/app/error.tsx
@@ -2,6 +2,7 @@
 
 import { useEffect } from 'react';
 import Link from 'next/link';
+import { trackEvent } from '../lib/telemetry';
 
 export default function GlobalError({
   error,
@@ -11,11 +12,10 @@ export default function GlobalError({
   reset: () => void;
 }) {
   useEffect(() => {
-    // TODO-011: Wire error boundary to telemetry
-    // Priority: low | Phase: cleanup
-    // Import { trackEvent } from '../lib/telemetry' and send error details:
-    //   trackEvent('app.error_boundary', { message: error.message, digest: error.digest })
-    // Also consider sending to @bytelyst/diagnostics-client if available.
+    trackEvent('error', 'app', 'error_boundary', {
+      message: error.message,
+      tags: error.digest ? { digest: error.digest } : undefined,
+    });
   }, [error]);
 
   return (