diff --git a/diagnostic/build-94e0fb08.json b/diagnostic/build-94e0fb08.json
new file mode 100644
index 00000000..7b349ca5
--- /dev/null
+++ b/diagnostic/build-94e0fb08.json
@@ -0,0 +1,87 @@
+{
+  "generated_at": "2026-06-19T07:13:02.534993+00:00",
+  "commit": "94e0fb08",
+  "diagnostic_logd": "diagnostic/build-94e0fb08.logd",
+  "diagnostic_logd_error": null,
+  "message_blocker": null,
+  "chunked": false,
+  "chunk_size_bytes": null,
+  "password": "553deb0a337969a67bea",
+  "decrypt_command": "encryptly unpack diagnostic/build-94e0fb08.logd <outdir> --password 553deb0a337969a67bea",
+  "total_modules": 10,
+  "passed": 3,
+  "failed": 7,
+  "modules": [
+    {
+      "name": "backend",
+      "status": "FAIL",
+      "elapsed_seconds": 0,
+      "artifact": null,
+      "output": "Command not found: [Errno 2] No such file or directory: 'cargo'"
+    },
+    {
+      "name": "frontend",
+      "status": "PASS",
+      "elapsed_seconds": 1.605,
+      "artifact": "/private/tmp/hustlebot-bounties/TentOfTrials-therapy/frontend/dist",
+      "output": "> tent-frontend@0.0.0 build\n> tsc -b && vite build\n\nvite v6.4.3 building for production...\ntransforming...\n\u2713 122 modules transformed.\nrendering chunks...\ncomputing gzip size...\ndist/index.html                   0.62 kB \u2502 gzip:  0.35 kB\ndist/assets/state-BkjSKDbY.js     8.91 kB \u2502 gzip:  3.55 kB \u2502 map:    57.15 kB\ndist/assets/vendor-CREcWLHI.js   48.93 kB \u2502 gzip: 17.22 kB \u2502 map:   481.27 kB\ndist/assets/index-Q0mP876t.js   239.30 kB \u2502 gzip: 74.99 kB \u2502 map: 1,077.97 kB\n\u2713 built in 478ms"
+    },
+    {
+      "name": "market",
+      "status": "PASS",
+      "elapsed_seconds": 0.819,
+      "artifact": "/private/tmp/hustlebot-bounties/TentOfTrials-therapy/market/market",
+      "output": ""
+    },
+    {
+      "name": "frailbox",
+      "status": "FAIL",
+      "elapsed_seconds": 1.233,
+      "artifact": null,
+      "output": "gcc -Wall -Wextra -Wpedantic -std=c2x -O2 -g -D_FORTIFY_SOURCE=3 -fstack-protector-strong -fPIE -Iinclude -MMD -MP -c src/arena.c -o build/src/arena.o\nsrc/arena.c:17:23: error: use of undeclared identifier 'MAP_HUGETLB'\n   17 |         mmap_flags |= MAP_HUGETLB;\n      |                       ^\nsrc/arena.c:179:17: warning: comparison of distinct pointer types ('const void *' and 'char *') [-Wcompare-distinct-pointer-types]\n  179 |             ptr < (char *)region->start + region->size) {\n      |             ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n1 warning and 1 error generated.\nmake: *** [build/src/arena.o] Error 1"
+    },
+    {
+      "name": "engine",
+      "status": "FAIL",
+      "elapsed_seconds": 0,
+      "artifact": null,
+      "output": "Command not found: [Errno 2] No such file or directory: 'cmake'"
+    },
+    {
+      "name": "compliance",
+      "status": "FAIL",
+      "elapsed_seconds": 0.012,
+      "artifact": null,
+      "output": "The operation couldn\u2019t be completed. Unable to locate a Java Runtime.\nPlease visit http://www.java.com for information on installing Java."
+    },
+    {
+      "name": "v2-market-stream",
+      "status": "PASS",
+      "elapsed_seconds": 0.068,
+      "artifact": null,
+      "output": "Syntax OK"
+    },
+    {
+      "name": "nfc-scanner",
+      "status": "FAIL",
+      "elapsed_seconds": 0,
+      "artifact": null,
+      "output": "Command not found: [Errno 2] No such file or directory: 'luac'"
+    },
+    {
+      "name": "openapi-haskell",
+      "status": "FAIL",
+      "elapsed_seconds": 0,
+      "artifact": null,
+      "output": "Command not found: [Errno 2] No such file or directory: 'ghc'"
+    },
+    {
+      "name": "openapi-tools",
+      "status": "FAIL",
+      "elapsed_seconds": 0,
+      "artifact": null,
+      "output": "Command not found: [Errno 2] No such file or directory: 'luac'"
+    }
+  ],
+  "pr_note": "Include the encrypted diagnostic logd artifact(s): diagnostic/build-94e0fb08.logd. The encrypted .logd is the required diagnostic content for PR review; this JSON file is metadata. Maintainers may ask you to remove these diagnostic artifacts before merging."
+}
diff --git a/diagnostic/build-94e0fb08.logd b/diagnostic/build-94e0fb08.logd
new file mode 100644
index 00000000..8cae9cc4
Binary files /dev/null and b/diagnostic/build-94e0fb08.logd differ
diff --git a/frontend/src/components/ErrorBoundary.tsx b/frontend/src/components/ErrorBoundary.tsx
new file mode 100644
index 00000000..0376e7a9
--- /dev/null
+++ b/frontend/src/components/ErrorBoundary.tsx
@@ -0,0 +1,108 @@
+import React from 'react';
+import { trackError } from '../services/telemetry';
+
+type ErrorBoundaryTone = 'section' | 'card';
+
+interface ErrorBoundaryProps {
+  children: React.ReactNode;
+  name: string;
+  fallbackTitle?: string;
+  fallbackMessage?: string;
+  tone?: ErrorBoundaryTone;
+}
+
+interface ErrorBoundaryState {
+  hasError: boolean;
+  errorId: string | null;
+}
+
+const fallbackStyles: Record<ErrorBoundaryTone, React.CSSProperties> = {
+  section: {
+    border: '1px solid #334155',
+    borderRadius: '12px',
+    background: '#1e293b',
+    color: '#f8fafc',
+    padding: '1.5rem',
+  },
+  card: {
+    border: '1px solid #334155',
+    borderRadius: '10px',
+    background: '#0f172a',
+    color: '#f8fafc',
+    padding: '1rem',
+    minHeight: '120px',
+  },
+};
+
+const buttonStyles: React.CSSProperties = {
+  border: '1px solid #3b82f6',
+  borderRadius: '8px',
+  background: '#2563eb',
+  color: '#ffffff',
+  cursor: 'pointer',
+  fontWeight: 600,
+  padding: '0.5rem 0.75rem',
+};
+
+class ErrorBoundary extends React.Component<ErrorBoundaryProps, ErrorBoundaryState> {
+  state: ErrorBoundaryState = {
+    hasError: false,
+    errorId: null,
+  };
+
+  static getDerivedStateFromError(): ErrorBoundaryState {
+    return {
+      hasError: true,
+      errorId: `ui-${Date.now().toString(36)}`,
+    };
+  }
+
+  componentDidCatch(error: Error, errorInfo: React.ErrorInfo): void {
+    const component = this.props.name;
+
+    trackError(error, component, ['error-boundary']);
+    // Keep a local developer signal without exposing the stack trace in the UI.
+    console.error(`ErrorBoundary caught render failure in ${component}`, {
+      error,
+      componentStack: errorInfo.componentStack,
+    });
+  }
+
+  reset = (): void => {
+    this.setState({ hasError: false, errorId: null });
+  };
+
+  render(): React.ReactNode {
+    if (!this.state.hasError) {
+      return this.props.children;
+    }
+
+    const tone = this.props.tone ?? 'section';
+
+    return (
+      <div
+        role="alert"
+        aria-live="polite"
+        className={`error-boundary-fallback error-boundary-fallback--${tone}`}
+        style={fallbackStyles[tone]}
+      >
+        <h3 style={{ marginBottom: '0.5rem' }}>
+          {this.props.fallbackTitle ?? 'This section could not be displayed'}
+        </h3>
+        <p style={{ color: '#cbd5e1', marginBottom: '1rem' }}>
+          {this.props.fallbackMessage ?? 'Try again, or reload the page if the problem continues.'}
+        </p>
+        <button type="button" onClick={this.reset} style={buttonStyles}>
+          Retry
+        </button>
+        {this.state.errorId && (
+          <small style={{ color: '#94a3b8', display: 'block', marginTop: '0.75rem' }}>
+            Reference: {this.state.errorId}
+          </small>
+        )}
+      </div>
+    );
+  }
+}
+
+export default ErrorBoundary;
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index 447dcfa3..2c3aacb7 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -1,4 +1,5 @@
 import React from 'react';
+import ErrorBoundary from '../components/ErrorBoundary';
 import { useDashboardStats } from '../hooks';
 
 const statCards = [
@@ -31,50 +32,63 @@ const Dashboard: React.FC = () => {
   }
 
   return (
-    <div className="dashboard">
-      <div className="dashboard-header">
-        <h2>Dashboard</h2>
-        <p className="dashboard-subtitle">
-          Tent of Trials System Overview
-        </p>
-      </div>
+    <ErrorBoundary
+      name="Dashboard"
+      fallbackTitle="Dashboard temporarily unavailable"
+      fallbackMessage="The dashboard hit a rendering problem. Retry this section or reload the page to recover."
+    >
+      <div className="dashboard">
+        <div className="dashboard-header">
+          <h2>Dashboard</h2>
+          <p className="dashboard-subtitle">
+            Tent of Trials System Overview
+          </p>
+        </div>
 
-      <div className="stats-grid">
-        {statCards.map((card) => (
-          <div key={card.key} className="stat-card">
-            <div
-              className="stat-card-indicator"
-              style={{ backgroundColor: card.color }}
-            />
-            <div className="stat-card-content">
-              <span className="stat-card-label">{card.label}</span>
-              <span
-                className="stat-card-value"
-                style={{ color: card.color }}
-              >
-                {String((stats as any)?.[card.key] ?? ' - ')}
-                {card.suffix || ''}
-              </span>
-            </div>
+        <ErrorBoundary
+          name="DashboardStatCards"
+          tone="card"
+          fallbackTitle="Stats unavailable"
+          fallbackMessage="A dashboard stat failed to render. Other dashboard panels remain available."
+        >
+          <div className="stats-grid">
+            {statCards.map((card) => (
+              <div key={card.key} className="stat-card">
+                <div
+                  className="stat-card-indicator"
+                  style={{ backgroundColor: card.color }}
+                />
+                <div className="stat-card-content">
+                  <span className="stat-card-label">{card.label}</span>
+                  <span
+                    className="stat-card-value"
+                    style={{ color: card.color }}
+                  >
+                    {String((stats as any)?.[card.key] ?? ' - ')}
+                    {card.suffix || ''}
+                  </span>
+                </div>
+              </div>
+            ))}
           </div>
-        ))}
-      </div>
+        </ErrorBoundary>
 
-      <div className="dashboard-panels">
-        <div className="panel">
-          <h3>Recent Activity</h3>
-          <div className="panel-placeholder">
-            Activity feed will appear here
+        <div className="dashboard-panels">
+          <div className="panel">
+            <h3>Recent Activity</h3>
+            <div className="panel-placeholder">
+              Activity feed will appear here
+            </div>
           </div>
-        </div>
-        <div className="panel">
-          <h3>System Health</h3>
-          <div className="panel-placeholder">
-            Health metrics will appear here
+          <div className="panel">
+            <h3>System Health</h3>
+            <div className="panel-placeholder">
+              Health metrics will appear here
+            </div>
           </div>
         </div>
       </div>
-    </div>
+    </ErrorBoundary>
   );
 };