[BUG] "v is not iterable" - Claude Code Panel fails to load on Antigravity (VSCode OSS 1.107.0)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

After updating Antigravity to version 1.19.6 (VSCode OSS 1.107.0), the Claude Code extension (v2.1.61) stopped working. The side panel shows "An error occurred while loading view: claudeVSCodePanel" and a notification error "v is not iterable" appears in the bottom left corner.

I have tried:

Downgrading the extension to previous versions (2.1.45, 2.1.39).

Clearing globalStorage and workspaceStorage.

Deleting storage.json.
None of these steps resolved the issue. It seems to be a compatibility problem between the latest extension and the Antigravity/OSS rendering engine.

<img width="494" height="384" alt="Image" src="https://github.com/user-attachments/assets/e59989b2-cdfb-4084-84c5-9e5b208927c8" />

<img width="1843" height="1020" alt="Image" src="https://github.com/user-attachments/assets/f7a6d129-d41d-4c33-93cc-e67aa2eb96dd" />

What Should Happen?

The Claude Code side panel should load the chat interface correctly without errors.

Error Messages/Logs

v is not iterable
An error occurred while loading view: claudeVSCodePanel

Steps to Reproduce

1. Open Antigravity (VSCode OSS 1.107.0).
2. Install or update Claude Code extension to v2.1.61.
3. Try to open the Claude Code side panel.
4. The panel remains black/empty and the "v is not iterable" error pops up.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.45

Claude Code Version

2.1.61

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_