I've been looking for a way to get notified when Claude Code needs my input or is finished. Big shout out to u/Ok-Engineering2612 on Reddit for this post:  WSL Toast Notifications with Hooks in Claude Code : r/ClaudeAI. I had been trying to do the same thing with BurntToast but I forget the way WSL interops with Windows.

The settings from the Reddit thread did need a little tweaking ($PAYLOAD is no longer supported and now Claude Code sends the JSON structure via stdin). Here's my change to the command:

 "command": "input=$(cat) && powershell.exe -NoProfile -Command \"Import-Module BurntToast; New-BurntToastNotification -Text 'Claude Code Notification', '$(echo \"$input\" | jq -r '.message')'\""

Here is the full documentation for hooks: Hooks reference