[BUG] Cowork code crashes

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?

Cowork/Code crashes immediately on macOS 26.3.1 (Apple Silicon), Claude Desktop 1.9659.2. Crashes on the first message of a fresh task. Already tried: VPN off + reboot, full vm_bundles delete with clean re-download. VM log stops right after the bundle loads, with networkMode=gvisor. Regular Chat works; only Cowork/Code crash. Matches the known 26.3.1 VM kernel-panic reports.

What Should Happen?

Claude cowork should run properly

Error Messages/Logs

Steps to Reproduce

Access claude cowork in the macOS desktop version, click on Cowork and enter a prompt

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude 1.9659.2 (390d6c) 2026-05-28T21:50:01.000Z

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_