[BUG] Agent cuts off mid-response then terminates silently — Windows v1.21.9

[Akhil_Rajeev_Kumar]

The Antigravity agent stopped responding completely starting Monday, March 31, 2026. After reinstalling fresh and signing in today, when I type a message and press send, the agent briefly shows “Generating…” then the indicator suddenly disappears after 2-3 seconds, terminating silently with no error message, response, or any indication of what happened. I’ve uninstalled and reinstalled Antigravity fresh, signed in again with my Google account, started a brand new chat, restarted VSCode multiple times, verified model quota is available (Gemini 3.1 Pro High has 60% remaining), and tried with simple prompts like “hello” and “wassup” - all with the same result. This behavior matches the persistent HTTP 500 errors reported by other users after the March 28-29 weekend outage, where despite Google’s status page marking the incident as resolved, users in certain regions still experience agents starting then cutting off mid-response with silent termination and no error messages. My system is Windows 11 (Build 26200) running Antigravity v1.21.9 with VSCode OSS 1.107.0, my account has no plan restrictions, I’m in Calgary, Alberta in North America (a different region from the reported Europe-West failures), I don’t have a VPN active, and there’s no antivirus quarantine of Antigravity. I’m happy to provide Output panel logs, traces, or other debugging information if needed to help track this down.