{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://harness-forge.dev/schemas/runtime/recursive-trace-event.schema.json",
  "title": "Recursive trace event",
  "type": "object",
  "additionalProperties": false,
  "required": ["eventId", "sessionId", "eventType", "occurredAt", "actor", "status"],
  "properties": {
    "eventId": { "type": "string" },
    "sessionId": { "type": "string" },
    "eventType": {
      "type": "string",
      "enum": ["tool-call", "batch-start", "batch-end", "subcall", "promotion", "budget-breach", "compact", "finalize", "resume"]
    },
    "occurredAt": { "type": "string", "format": "date-time" },
    "actor": {
      "type": "string",
      "enum": ["runtime", "operator", "child-session"]
    },
    "inputRefs": {
      "type": "array",
      "items": { "type": "string" }
    },
    "outputRefs": {
      "type": "array",
      "items": { "type": "string" }
    },
    "status": {
      "type": "string",
      "enum": ["success", "partial", "blocked", "failed"]
    },
    "budgetImpact": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "iterationsUsed": { "type": "integer", "minimum": 0 },
        "subcallsUsed": { "type": "integer", "minimum": 0 },
        "batchWidthUsed": { "type": "integer", "minimum": 0 }
      }
    },
    "notes": { "type": "string" }
  }
}