{
  "schema_version": "0.1",
  "message_id": "msg-slack-water-handover-2026",
  "type": "system",
  "sender": {
    "identity": "marit@mail.example",
    "display_name": "Marit Halvorsen",
    "verification_level": "oauth",
    "profile_url": "https://marit-halvorsen.example"
  },
  "recipient": {
    "identity": "kofi@mail.example",
    "profile_url": "https://kofi-mensah.example"
  },
  "via_pool": {
    "url": "https://slackwaterfest.example/pools/slack-water-2026.json",
    "id": "slack-water-2026",
    "name": "Slack Water 2026"
  },
  "sent_at": "2026-08-31T16:00:00Z",
  "subject": "Slack Water 2026: Birdie keeps the Pool from today",
  "body": {
    "content_type": "text/plain",
    "content": "Thank you for a good weekend.\n\nThe festival is over and the Pool stays. From today Birdie Novak keeps it. She ran the info tent for six summers, and she will answer anyone who writes about the Pool until next year’s opens. I stay listed, and I will take no action in it.\n\nNothing about your place changes. Your page is still yours, and you can leave any time from this message.\n\nMarit"
  },
  "transport": {
    "type": "email"
  }
}