Antigravity Agent Execution Terminated Due To Error | How to Fix it

The error “antigravity agent execution terminated” is a specific crash message from Google Antigravity, the new AI-first IDE (Integrated Development Environment) released by Google around mid-November 2025.

This error typically occurs when the autonomous AI agent running in your background (powered by Gemini 3) encounters a model overload or a permission deadlock it cannot resolve on its own.

Here is how to fix it based on the current known issues with the Antigravity Public Preview:

1. The Most Common Cause: “Model Provider Overload”

If the full error message mentions “overload,” it means the Gemini 3 Pro backend is currently receiving too much traffic.

• Quick Fix: Do not just restart the IDE. Instead, type “continue” or “proceed” in the agent chat window. Users have reported this often “wakes” the agent up and forces a retry without losing your context.

• Model Switch: If it keeps failing, click the model picker (usually bottom-left or top-right of the Agent Manager) and switch from Gemini 3 Pro to Gemini 3 Flash (or “Standard”). The lighter models are less likely to time out during peak hours.

2. The Hidden Cause: Permission & Security Blocks

The Antigravity agent attempts to execute terminal commands autonomously. If it tries to run a command that requires elevated privileges (like sudo, chmod, or accessing a protected root directory) and gets denied, it can sometimes crash rather than fail gracefully.

• Check the Output Panel: Go to View > Output and select “Antigravity Agent” from the dropdown. Look for “Access Denied” or “EPERM” errors right before the termination.

• The Fix: You may need to manually run the blocked command in the terminal yourself, then tell the agent, “I have run the command manually. Proceed.”

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3. Resetting the Agent Service

If the agent is completely stuck (spinning indefinitely or immediately crashing on new prompts), the background service is likely hung.

1. Open the Command Palette (Ctrl+Shift+P or Cmd+Shift+P).

2. Type and select “Antigravity: Restart Agent Service”.

3. Wait about 15–30 seconds for the “Mission Control” dashboard to reload.

4. Context Window Overflow

If you have been in the same agent session for hours or have added massive documentation files, the context window might be corrupted.

• The Fix: In the Agent Manager view, click “New Agent” or “Spawn Sub-Agent” to start a fresh context for your next task.