{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/codecentric/spring-boot-admin/schema/instance-event",
  "title": "Spring Boot Admin Instance Event",
  "description": "A lifecycle event for a Spring Boot Admin instance, delivered via Server-Sent Events (SSE) from the /instances/events endpoint.",
  "type": "object",
  "properties": {
    "instance": {
      "type": "string",
      "description": "The instance ID this event pertains to.",
      "example": "abc123def456"
    },
    "version": {
      "type": "integer",
      "description": "Monotonically increasing version number for ordering events.",
      "minimum": 0
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "ISO 8601 timestamp when this event occurred."
    },
    "type": {
      "type": "string",
      "description": "Type of lifecycle event.",
      "enum": [
        "REGISTERED",
        "DEREGISTERED",
        "STATUS_CHANGED",
        "INFO_CHANGED",
        "ENDPOINTS_DETECTED"
      ]
    },
    "statusInfo": {
      "type": "object",
      "description": "New status information (present for STATUS_CHANGED events).",
      "properties": {
        "status": {
          "type": "string",
          "enum": ["UP", "DOWN", "OUT_OF_SERVICE", "UNKNOWN", "RESTRICTED", "OFFLINE"]
        },
        "details": {
          "type": "object",
          "additionalProperties": true
        }
      }
    },
    "info": {
      "type": "object",
      "description": "Updated application info payload (present for INFO_CHANGED events).",
      "additionalProperties": true
    }
  },
  "required": ["instance", "version", "timestamp", "type"]
}