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Comment by momentmaker | Hacker News Reader

You can use edit your settings.json in ~/.claude and put a hook for it like this:

    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "afplay ~/.claude/hooks/chime.wav",
            "async": true
          },

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That hook is also called when subagents stop which means you'll get a lot of false positives.

Ideally you are only notified when the main agent stops, the main agent has a question, or a subagent has a question.

I created a script that figures out if any of those states apply before emitting a macOS notification and then called it in each hook:

    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "script.sh",
            "timeout": 10
          }
        ]
      }
    ],
    "PreToolUse": ...
    "PermissionRequest": ...
    "Elicitation": ...

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