{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Agent Tool progress",
  "type": "object",
  "required": [
    "schema_version",
    "progress_id",
    "invocation_id",
    "sequence",
    "status",
    "timestamp"
  ],
  "properties": {
    "schema_version": {
      "type": "string"
    },
    "progress_id": {
      "type": "string"
    },
    "invocation_id": {
      "type": "string"
    },
    "sequence": {
      "type": "integer"
    },
    "status": {
      "type": "string"
    },
    "message": {
      "type": "string"
    },
    "percent": {
      "type": "number",
      "minimum": 0,
      "maximum": 100
    },
    "current_step": {
      "type": "string"
    },
    "total_steps": {
      "type": "integer"
    },
    "elapsed_ms": {
      "type": "integer"
    },
    "bytes_read": {
      "type": "integer"
    },
    "bytes_written": {
      "type": "integer"
    },
    "line_count": {
      "type": "integer"
    },
    "task_id": {
      "type": "string"
    },
    "partial_result_refs": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "artifact_refs": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": true
      }
    },
    "timestamp": {
      "type": "string"
    }
  },
  "additionalProperties": true
}