[BUG] Hooks execution deferred until terminal tab regains focus (Windows Terminal)

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

• OS: Windows 11 Pro (10.0.26200)
• Terminal: Windows Terminal (Store version)
• Shell: PowerShell 5.1
• Claude Code: VSCode extension + terminal CLI

Behavior

Hook commands (Stop, Notification, PermissionRequest) do not execute until the
Windows Terminal tab running Claude Code regains focus. The hook is queued but
not fired while the tab is in the background.

Reproduction

1. Configure a hook that writes to a log file:

```json
"hooks": {
"Stop": [{ "matcher": "", "hooks": [{ "type": "command", "command": "bash -c \"echo $(date) >> /tmp/hook-debug.log\"" }] }]
}

What Should Happen?

Hook command should be executed immediately

Error Messages/Logs

Steps to Reproduce

Reproduction

1. Configure a hook that writes to a log file:

```json
"hooks": {
"Stop": [{ "matcher": "", "hooks": [{ "type": "command", "command": "bash -c \"echo $(date) >> /tmp/hook-debug.log\"" }] }]
}

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.70

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Reproducible both with powershell and vscode extension