{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://stella-ops.org/notify/schemas/receipt.schema.json",
  "title": "Notify Delivery Receipt",
  "type": "object",
  "required": ["schema_version", "tenant_id", "delivery_id", "rule_id", "channel", "status", "sent_at"],
  "properties": {
    "schema_version": { "type": "string", "pattern": "^v[0-9]+\\.[0-9]+$" },
    "tenant_id": { "type": "string", "minLength": 1 },
    "delivery_id": { "type": "string", "pattern": "^[0-9a-fA-F-]{18,36}$" },
    "rule_id": { "type": "string" },
    "channel": { "type": "string" },
    "status": { "type": "string", "enum": ["sent", "delivered", "failed", "queued", "acknowledged"] },
    "attempt": { "type": "integer", "minimum": 1 },
    "sent_at": { "type": "string", "format": "date-time" },
    "ack_url": { "type": "string", "format": "uri" },
    "response": { "type": "object" },
    "errors": { "type": "array", "items": { "type": "string" } }
  },
  "additionalProperties": false
}