[Bug] AGY 2.4.2 Regression: Misbehaving MCP server freezes entire IDE conversation panel

Google Antigravity
1

**Title (Title)**: [Bug] AGY 2.4.2 Regression: Misbehaving MCP server freezes entire IDE conversation panel

**Body (Body)**: Hi team,

I am migrating this bug report from the GitHub CLI repository (Issue #701) at the request of the maintainer (@manirajc).

Description:
Since upgrading to AGY 2.4.2, there appears to be a regression regarding how the IDE handles unresponsive MCP servers. Specifically, if an MCP server (e.g., markitdown-mcp) misbehaves, hangs, or times out, it causes the entire conversation panel in the Antigravity IDE to freeze. The UI becomes completely unresponsive, forcing a hard restart of the IDE session to recover.

Environment:

  • OS: Windows
  • Antigravity Version: 2.4.2
  • Triggering Component: markitdown-mcp (but likely affects any unresponsive MCP server)

Steps to Reproduce:

  1. Configure an MCP server in the IDE.
  2. Trigger a condition where the MCP server hangs, throws a silent error, or fails to respond gracefully.
  3. Observe that the entire conversation panel completely freezes instead of timing out or showing an error state.

Expected Behavior:
The IDE should isolate MCP server failures. If a tool call times out or the server crashes, the conversation panel should remain responsive, display an error alert to the user, and allow the conversation to continue (or at least provide an option to restart the specific MCP server).

Additional Context:
This severely impacts the developer workflow, as any unstable external MCP server can take down the entire IDE session. Combined with other recent process management bugs (e.g., Issue #682 regarding orphaned language_server processes), IDE stability in the 2.4.x branch has been challenging.

Please let me know if you need any local logs or diagnostic information to help track this down!

Best regards,
Gerald

2

Hello @CHIH-YANG_HUANG

  • Please ensure you are running Antigravity version 2.7.1 (released August 11, 2026), which addresses these freezes by adding timeouts for MCP server connections and tool calls.

If the IDE continues to freeze after updating-

  • Can you clarify which specific MCP server is triggering the issue?
  • Can you provide any relevant console errors, terminal output, or background IDE logs generated when the panel locks up?
  • Additionally, please provide visual evidence of the freeze or any process spikes in your Task Manager.

Finally, use the in-app “Report Issue” feedback tool in the top-right corner to capture diagnostic data for our engineering team.