[BUG] Chrome native host crashes with Bun internal assertion failure on Windows

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?

Environment:
Windows 11
Claude Code 2.1.31
Chrome extension ID: fcoeoabgfenejglbffodgkkbkcdhcgfn
Bun v1.3.5

Description:
Chrome extension connects via /mcp but immediately disconnects when any browser tool is used. Running the native host directly shows a Bun crash:

Crash report link:
https://bun.report/1.3.5/e_11e86cebEugggC++08F+mvBoxhkf0389e__0shkwCA0eNrzzCtJLcpLzFFILC5OLSrJzM9TSEvMzCktSgUAiSkKPg

What Should Happen?

Claude Code chat/connect to Chrome Extension

Error Messages/Logs

[Claude Chrome Native Host] Initializing...
[Claude Chrome Native Host] Creating socket listener: \\.\pipe\claude-mcp-browser-bridge-bradm
panic(main thread): Internal assertion failure
oh no: Bun has crashed.

Steps to Reproduce

Claude --Chrome

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code 2.1.31

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

This is a known crash type in Bun and Anthropic's team will need to fix it. Unfortunately there's no workaround on your end until they patch it.