SREnetic

Autonomous SRE Incident Response

Sentinel Monitoring

Input your own code, logs, and metrics, or use the "Reset" button to generate a new random scenario. Then click "Simulate Incident" to start.

Sample Code

import { useEffect, useState } from 'react';

function UserProfile({ userId }) {
  const [user, setUser] = useState(null);

  useEffect(() => {
    fetch(`/api/users/${userId}`)
      .then(res => res.json())
      .then(data => setUser(data));
  }, [userId]);

  // BUG: The component will crash if 'user' is null on the first render.
  return (
    <div>
      <h1>{user.name}</h1>
      <p>{user.email}</p>
    </div>
  );
}

Logs

[2025-09-20T21:31:22.109Z] [ERROR] TypeError: Cannot read properties of null (reading 'name') at UserProfile.
[2025-09-20T21:31:22.009Z] [INFO] Component 'UserProfile' rendering with props: {userId: '123'}.
[2025-09-20T21:31:22.159Z] [ERROR] Unhandled Promise Rejection: API call to '/api/users/123' failed.

Metrics

api_error_rate{endpoint="/api/users/:id"}: 100%
component_crash_rate{component="UserProfile"}: 100%
response_time{endpoint="/api/users/:id"}: 139ms