{
  "hooks": {
    "Stop": [
      {
        "hooks": [
          {
            "type": "command",
            "command": "curl -X POST -H 'Content-Type: application/json' -d '{\"text\":\"Task completed\"}' ${SLACK_WEBHOOK_URL} 2>/dev/null || true"
          }
        ]
      }
    ]
  }
}