[BUG] Chrome native messaging host crashes with Bun panic on Windows 11

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?

The Claude in Chrome integration fails to connect because the native messaging host crashes immediately on startup
with a Bun internal assertion failure.

Environment:

• OS: Windows 11
• Claude Code version: 2.1.23
• Bun version (bundled): 1.3.5

Steps to reproduce:

1. Run Claude Code with Chrome integration enabled
2. Use /chrome command or attempt to use any mcp__claude-in-chrome__* tool
3. MCP server shows as failed

Expected behavior:
Native messaging host starts successfully and Chrome extension connects.

Actual behavior:
The native host crashes immediately with:

[Claude Chrome Native Host] Initializing...
[Claude Chrome Native Host] Creating socket listener: \\.\pipe\claude-mcp-browser-bridge-satya

panic(main thread): Internal assertion failure
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

Diagnostic info:

Manually running the native host produces the crash:
echo '{"type":"ping"}' | "C:/Users/satya/.claude/chrome/chrome-native-host.bat"

Registry entry exists and points to correct location:
HKCU\Software\Google\Chrome\NativeMessagingHosts\com.anthropic.claude_code_browser_extension

Native host manifest and batch script are correctly configured in ~/.claude/chrome/.

Bun crash report:
https://bun.report/1.3.5/e_11e86cebEugggC++08F+mvBoxhkf0389e__0shkwCA0eNrzzCtJLcpLzFFILC5OLSrJzM9TSEvMzCktSgUAiSkKPg

What Should Happen?

Should just work

Error Messages/Logs

Steps to Reproduce

n/a

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.23

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_