{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://hunter-harness.local/contracts/external-platform-observation.schema.json",
  "title": "Authoritative External Platform Observation",
  "type": "object",
  "additionalProperties": true,
  "required": [
    "subjectIdentity",
    "businessState",
    "observationState",
    "freshness",
    "retryable",
    "reasonCode",
    "observedAt"
  ],
  "properties": {
    "subjectIdentity": {
      "type": "string",
      "minLength": 1
    },
    "businessState": {
      "enum": [
        "PENDING",
        "RUNNING",
        "SUCCEEDED",
        "FAILED",
        "CANCELLED",
        "UNKNOWN"
      ]
    },
    "observationState": {
      "enum": [
        "PENDING",
        "TERMINAL",
        "UNKNOWN"
      ]
    },
    "freshness": {
      "enum": [
        "FRESH",
        "STALE",
        "UNKNOWN"
      ]
    },
    "retryable": {
      "type": "boolean"
    },
    "reasonCode": {
      "type": "string",
      "minLength": 1
    },
    "observedAt": {
      "type": "string",
      "format": "date-time"
    },
    "idempotencyKey": {
      "type": "string",
      "minLength": 1
    },
    "payload": {}
  }
}