Screenshot of the console during the hang (Help > Toggle Developer Tools > Console) - look for “ETIMEDOUT” or “unavailable” errors
Result of Cursor Settings > Network > Run Diagnostics
Quick checks:
Run cursor --disable-extensions in the terminal, open a new Cursor window, try the Agent in an empty project (no open repos) - if it works, it’s an extensions issue
Cursor Settings > Network > enable “Disable HTTP/2”, then restart
Try another model (Sonnet 4.5) - if it works, it might be related to Opus 4.5