{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://thinkloom.app/schemas/provenance/1.0/invocation-state.schema.json",
  "title": "Invocation state",
  "description": "Operational invocation lifecycle projection.",
  "type": "object",
  "properties": {
    "schema_version": {
      "const": "1.0"
    },
    "invocation_id": {
      "type": "string",
      "pattern": "^invocation_[0-9A-HJKMNP-TV-Z]{26}$"
    },
    "state": {
      "enum": [
        "REQUEST_PREPARED",
        "REQUEST_RECORDED",
        "MODEL_RUNNING",
        "RESPONSE_RECEIVED",
        "RESPONSE_RECORDED",
        "STAGED_PREVIEW",
        "FAILED",
        "CANCELLED",
        "ABANDONED"
      ]
    },
    "state_sequence": {
      "type": "integer",
      "minimum": 1
    },
    "updated_at": {
      "type": "string",
      "format": "date-time",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}Z$"
    },
    "failure_id": {
      "anyOf": [
        {
          "type": "string",
          "pattern": "^failure_[0-9A-HJKMNP-TV-Z]{26}$"
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": [
    "schema_version",
    "invocation_id",
    "state",
    "state_sequence",
    "updated_at",
    "failure_id"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "schema_version": "1.0",
      "invocation_id": "invocation_01J00000000000000000000008",
      "state": "REQUEST_RECORDED",
      "state_sequence": 2,
      "updated_at": "2026-07-17T18:42:10.123Z",
      "failure_id": null
    }
  ]
}