{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.com/schemas/highlight-io/highlight-log-schema.json",
  "title": "Highlight Log Record (OTLP)",
  "description": "Schema for a single OpenTelemetry log record as accepted by the Highlight OTLP HTTP/JSON endpoint at /v1/logs.",
  "type": "object",
  "required": ["timeUnixNano", "body"],
  "properties": {
    "timeUnixNano": { "type": "string", "description": "Event timestamp in nanoseconds since UNIX epoch." },
    "observedTimeUnixNano": { "type": "string" },
    "severityNumber": {
      "type": "integer",
      "description": "OpenTelemetry severity number (1-24). 9=INFO, 13=WARN, 17=ERROR, 21=FATAL.",
      "minimum": 1,
      "maximum": 24
    },
    "severityText": {
      "type": "string",
      "description": "Human-readable severity label.",
      "examples": ["TRACE", "DEBUG", "INFO", "WARN", "ERROR", "FATAL"]
    },
    "body": {
      "oneOf": [
        { "type": "string" },
        {
          "type": "object",
          "properties": {
            "stringValue": { "type": "string" },
            "intValue": { "type": "string" },
            "doubleValue": { "type": "number" },
            "boolValue": { "type": "boolean" }
          }
        }
      ]
    },
    "attributes": {
      "type": "array",
      "description": "Recommended attributes: highlight.session_id, highlight.trace_id, service.name.",
      "items": {
        "type": "object",
        "required": ["key"],
        "properties": {
          "key": { "type": "string" },
          "value": {
            "type": "object",
            "properties": {
              "stringValue": { "type": "string" },
              "boolValue": { "type": "boolean" },
              "intValue": { "type": "string" },
              "doubleValue": { "type": "number" }
            }
          }
        }
      }
    },
    "traceId": { "type": "string", "description": "16-byte hex trace ID for correlation." },
    "spanId": { "type": "string", "description": "8-byte hex span ID for correlation." }
  }
}