[BUG] No notifications in windows desktop app

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?

When Claude Desktop is minimized or in the background on Windows, no toast/popup notification appears when a response completes. The expected behavior is that Windows should display a notification banner alerting the user that Claude has finished responding, allowing them to context-switch back without constantly checking the app.

What Should Happen?

A Windows toast notification (banner popup) should appear when Claude finishes a response, consistent with how other messaging/chat apps behave on Windows.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Desktop on Windows (latest version)
2. Send a message in a conversation
3. Minimize or move focus to another application
4. Wait for Claude to finish responding
5. No Windows toast notification appears

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude 1.1.7203 (034f07) 2026-03-17T17:48:28.000Z

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

Things Already Tried

• Confirmed notifications are enabled for Claude in Windows Settings → System → Notifications
• Confirmed Focus Assist / Do Not Disturb is off
• Confirmed "Show notification banners" is toggled on for Claude in per-app notification settings
• Fully quit and restarted the app (including checking system tray)
• Running latest version of Claude Desktop

None of these resolved the issue. This appears to be a bug in how the app registers with the Windows notification system, possibly related to the MSIX packaging.