{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://stella-ops.org/notify/schemas/event-envelope.schema.json",
  "title": "Notify Event Envelope",
  "type": "object",
  "required": [
    "schema_version",
    "tenant_id",
    "event_id",
    "occurred_at",
    "kind",
    "payload"
  ],
  "properties": {
    "schema_version": { "type": "string", "pattern": "^v[0-9]+\\.[0-9]+$" },
    "tenant_id": { "type": "string", "minLength": 1 },
    "event_id": { "type": "string", "pattern": "^[0-9a-fA-F-]{18,36}$" },
    "occurred_at": { "type": "string", "format": "date-time" },
    "kind": { "type": "string", "minLength": 1 },
    "correlation_id": { "type": "string" },
    "source": { "type": "string" },
    "payload": { "type": "object" },
    "attributes": { "type": "object", "additionalProperties": { "type": ["string", "number", "boolean", "null"] } }
  },
  "additionalProperties": false
}