Chrome native host crashes on Windows with Bun panic: "Internal assertion failure"

The Chrome extension fails to connect to Claude Code on Windows. When attempting to reconnect, the tab navigates to
clau.de/chrome/reconnect and immediately closes. Running the native host manually reveals a Bun runtime crash.

Environment

• OS: Windows 10 (10.0.19045.6456)
• Claude Code version: 2.1.22
• Chrome extension: Installed and enabled

Steps to Reproduce

1. Install Claude Code on Windows
2. Install Claude Chrome extension
3. Run /chrome in Claude Code - shows extension is installed
4. Try to reconnect from the Chrome extension
5. Tab opens to clau.de/chrome/reconnect then immediately closes

Root Cause

Running the native host manually crashes immediately:

& "C:\Users\Austin\.local\bin\claude.exe" --chrome-native-host

Output:

  [Claude Chrome Native Host] Initializing...
  [Claude Chrome Native Host] Creating socket listener: \\.\pipe\claude-mcp-browser-bridge-Austin
  ============================================================
  Bun v1.3.5 (1e86cebd) Windows x64 (baseline)
  Windows v.win10_cu
  CPU: sse42 avx avx2
  Args: "C:\Users\Austin\.local\bin\claude.exe" "--chrome-native-host"
  Features: Bun.stderr(2) Bun.stdin(2) Bun.stdout(2) jsc standalone_executable
  Builtins: [...]
  Elapsed: 486ms | User: 750ms | Sys: 125ms
  RSS: 0.52GB | Peak: 0.52GB | Commit: 0.50GB | Faults: 127491 | Machine: 67.84GB

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

Bun Crash Report

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

Verified Setup

• Native messaging host is registered in Windows registry ✓
• Manifest file exists at registered path ✓
• Batch file exists and points to correct claude.exe ✓
• claude.exe exists ✓

Expected Behavior

The native host should start successfully and allow the Chrome extension to connect.