Antigravity CLI crashes with "Agent execution terminated due to error" for every prompt

Google Antigravity
,
1

I am encountering an issue with Antigravity CLI where every prompt fails with the following message:

:warning: Agent execution terminated due to error. Error ID: 3c6dfd1b-130c-45ee-8d4c-7bf9baa59ced-3

Subsequent attempts generate the same error with a different suffix, for example:

Error ID: 3c6dfd1b-130c-45ee-8d4c-7bf9baa59ced-7

Environment

  • OS: Windows
  • Antigravity CLI version: 1.1.2
  • Model: Gemini 3.5 Flash

Steps already completed

  • Installed Python 3.12.
  • Installed analytics-mcp successfully.
  • Configured Google Cloud project.
  • Completed gcloud auth login.
  • Completed gcloud auth application-default login.
  • Verified Application Default Credentials (ADC).
  • Enabled the required Google Cloud APIs.
  • Configured the Analytics MCP server.
  • Antigravity successfully detects the Analytics MCP plugin and its tools.

Observed behavior

The error occurs even for prompts that do not use MCP, such as:

hello

or

2+2

The Analytics MCP plugin can be discovered successfully, but the agent terminates before returning any response.

Expected behavior

Antigravity should respond to normal prompts and execute Analytics MCP tools successfully.

Could you please help determine whether this is a known runtime issue or if there are additional diagnostics I can provide?

Thank you.