{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://trixie.invalid/contracts/v1/realtime-event.json",
  "title": "Trixie Realtime Event",
  "type": "object",
  "additionalProperties": false,
  "required": ["event_id", "event_type", "occurred_at", "payload"],
  "properties": {
    "event_id": { "type": "string", "minLength": 1 },
    "event_type": { "type": "string", "pattern": "^[a-z0-9_.-]+$" },
    "occurred_at": { "type": "string", "format": "date-time" },
    "payload": { "type": "object" }
  }
}