1 min lesson
End with a one-line root cause
Use the lesson to respond to this: "Sign-in fails and the Network tab shows repeated 407 responses. What's the most likely root cause?" Keep the answer plain.
Step 1 of 2
End with a one-line root causefor an audience that isn't an engineer
Raw logs don't close a ticket. Translation does. "Your VPN is blocking the model endpoint, so completions time out" is something a user and a manager can both act on. Compress the trace into one plain sentence that names the cause and the fix.
A log line that correlates isn't proof. Before you call it root cause, change that one thing and confirm the symptom disappears - and only that symptom. Correlation in a noisy log is how a wrong fix ships.
“The console shows repeated 407s on the completions endpoint, which means a proxy is rejecting the requests. In plain terms: your network is blocking Cursor's model calls. Allowlisting the endpoint should fix it and I'll confirm by watching those 407s clear.”