{
  "schema_version": 2,
  "model": "deepseek/deepseek-v4-flash-0731",
  "outcome": {
    "status": "running"
  },
  "usage": {
    "input_tokens": 12312,
    "output_tokens": 1273,
    "cache_read_tokens": 9728,
    "cache_creation_tokens": 0,
    "cost_usd": 0.000591508
  },
  "messages": [
    {
      "role": "user",
      "content": "Build the service in the contract appended below on this blank host. Speed matters, but only a durable deployment can win.\n\n\nThe controller-owned referee is the only authority on completion. Do not stop after merely describing the work. Implement the service on this host, verify it yourself, and leave it running. You have no access to referee evidence or other competitors.\n\n# Service contract\n\n# Durable service contract\n\nExpose an HTTP service on port 8080. `GET /health` must return status 200 and\nthe exact body `ready`. `PUT /records/<id>` stores the request body and returns\nstatus 204. `GET /records/<id>` returns the exact stored body with status 200.\n\nThe blank guest includes a dormant `builder-app.service` deployment slot whose\nexecutable path is `/opt/builder/app.py`. Supply the application there and start\nthe existing unit. Stored records must survive restart of that service and a\nhost reboot. The deployment must return without agent help after reboot."
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Let me start by exploring the environment to understand what's there.\n\nLet me check the system, the existing unit file, and plan.\n\nLet me create a todo list and explore.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Let me start by explori",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "ng the environment to under",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "sta",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "nd what's th",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "ere.\n\nLet m",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "e check the system,",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " the existing u",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "nit",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " file, and pl",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "an.\n\nLet me create a tod",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "o list and explore.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "chatcmpl-tool-a7ff017e1c4fce9d",
          "name": "TodoWrite",
          "input": {
            "todos": [
              {
                "activeForm": "Exploring host and service unit",
                "content": "Explore host and existing service unit",
                "status": "in_progress"
              },
              {
                "activeForm": "Implementing HTTP service",
                "content": "Implement /opt/builder/app.py HTTP service",
                "status": "pending"
              },
              {
                "activeForm": "Configuring durable storage",
                "content": "Configure durable storage for records",
                "status": "pending"
              },
              {
                "activeForm": "Starting and verifying service",
                "content": "Start and verify the service and unit",
                "status": "pending"
              },
              {
                "activeForm": "Verifying restart persistence",
                "content": "Verify restart persistence",
                "status": "pending"
              }
            ]
          }
        },
        {
          "type": "tool_use",
          "id": "chatcmpl-tool-b8596a94d0a2f37f",
          "name": "Bash",
          "input": {
            "command": "ls -la /opt/builder 2>/dev/null; echo \"---\"; cat /etc/systemd/system/builder-app.service 2>/dev/null; echo \"---\"; systemctl status builder-app.service 2>/dev/null; echo \"---\"; cat /etc/os-release | head -3; echo \"---\"; python3 --version; which python3",
            "description": "Inspect environment and service unit"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "chatcmpl-tool-a7ff017e1c4fce9d",
          "content": "Added:\n  + Explore host and existing service unit\n  + Implement /opt/builder/app.py HTTP service\n  + Configure durable storage for records\n  + Start and verify the service and unit\n  + Verify restart persistence\n\nCurrent tasks:\n  ◉ Explore host and existing service unit\n  ○ Implement /opt/builder/app.py HTTP service\n  ○ Configure durable storage for records\n  ○ Start and verify the service and unit\n  ○ Verify restart persistence\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "chatcmpl-tool-b8596a94d0a2f37f",
          "content": "---\n[Unit]\nAfter=network.target\nDescription=Agent-built application slot\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/54jg0kk0cn5h7j19r0l8x36fmbfywwjj-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/di26b1kkbammy0sj70nq5qzvfrh78wxl-coreutils-9.11/bin:/nix/store/fcqbwp5hx5wh3lzf0457wmf0divknz7y-findutils-4.11.0/bin:/nix/store/aak8d9mrdv9sgn0lcg7xss7wxdg9sqh3-gnugrep-3.12/bin:/nix/store/7mfsmbhsd3arnypipwm251rcd0b45riy-gnused-4.10/bin:/nix/store/r6sz8p6sd6c73fp9z8nzl04dri7lyx8n-systemd-261.1/bin:/nix/store/di26b1kkbammy0sj70nq5qzvfrh78wxl-coreutils-9.11/sbin:/nix/store/fcqbwp5hx5wh3lzf0457wmf0divknz7y-findutils-4.11.0/sbin:/nix/store/aak8d9mrdv9sgn0lcg7xss7wxdg9sqh3-gnugrep-3.12/sbin:/nix/store/7mfsmbhsd3arnypipwm251rcd0b45riy-gnused-4.10/sbin:/nix/store/r6sz8p6sd6c73fp9z8nzl04dri7lyx8n-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/2nndxyf3phkb5aggxm3c16sapa0f49kz-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n---\n× builder-app.service - Agent-built application slot\n     Loaded: loaded (/etc/systemd/system/builder-app.service; enabled; preset: ignored)\n     Active: failed (Result: start-limit-hit) since Fri 2026-08-14 15:01:12 UTC; 13s ago\n   Duration: 67ms\n Invocation: a964b710ceaa497b816a43592080aa77\n    Process: 604 ExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py (code=exited, status=2)\n   Main PID: 604 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.1M\n        CPU: 33ms\n\nAug 14 15:01:12 builder-two systemd[1]: builder-app.service: Scheduled restart job, restart counter is at 5.\nAug 14 15:01:12 builder-two systemd[1]: builder-app.service: Start request repeated too quickly.\nAug 14 15:01:12 builder-two systemd[1]: builder-app.service: Failed with result 'start-limit-hit'.\nAug 14 15:01:12 builder-two systemd[1]: Failed to start Agent-built application slot.\n---\nANSI_COLOR=\"0;38;2;126;186;228\"\nBUG_REPORT_URL=\"https://github.com/NixOS/nixpkgs/issues\"\nBUILD_ID=\"26.11.20260810.2fcb964\"\n---\nPython 3.14.6\n/run/current-system/sw/bin/python3\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "The unit exists and is enabled, pointing to /opt/builder/app.py which doesn't exist yet. I need to create that file. Python 3.14 available. Let me create app.py using just stdlib (http.server). Store records durably in /opt/builder/data directory.\n\nLet me write the app. Use ThreadingHTTPServer. Handle PUT and GET. Store body to a file keyed by id. Use a data directory.\n\nLet me create the file and data directory.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "T",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "he unit exis",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "ts and is",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " enabled, pointing t",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "o /opt/bu",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "ilder/app.py which do",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "esn't exist yet. I n",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "eed to create",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " that file. Pyt",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "hon 3.14 availa",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "ble.",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " Let me create",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " app.py u",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "sing just std",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "lib (h",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "ttp.server)",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": ". Store",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " records durably in /opt/builder/data directory.\n\nLet me write t",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "he app. Use Threading",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "HTTPServ",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "er. Handle PUT a",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "nd",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " GE",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "T. Store",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " body to a file",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " keyed",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " by id. Use a data directory.",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "\n\nLet me c",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": "reate",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " the file",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " and data directory.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "The unit exists, points to `/opt/builder/app.py` which doesn't exist yet. Let me create the service using Python stdlib with durable file storage.\n\n"
        },
        {
          "type": "tool_use",
          "id": "chatcmpl-tool-9567e3d060158192",
          "name": "Write",
          "input": {
            "content": "#!/usr/bin/env python3\nimport os\nimport re\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDATA_DIR = \"/opt/builder/data\"\nos.makedirs(DATA_DIR, exist_ok=True)\n\nID_RE = re.compile(r\"^/records/([^/]+)$\")\n\n\nclass Handler(BaseHTTPRequestHandler):\n    protocol_version = \"HTTP/1.1\"\n\n    def _save(self):\n        self.server.shutdown_request(self.request)\n\n    def do_GET(self):\n        if self.path == \"/health\":\n            body = b\"ready\"\n            self.send_response(200)\n            self.send_header(\"Content-Length\", str(len(body)))\n            self.end_headers()\n            self.wfile.write(body)\n            return\n        m = ID_RE.match(self.path)\n        if not m:\n            self.send_response(404)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n            return\n        rid = m.group(1)\n        path = os.path.join(DATA_DIR, rid)\n        if not os.path.isfile(path):\n            self.send_response(404)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n            return\n        with open(path, \"rb\") as f:\n            body = f.read()\n        self.send_response(200)\n        self.send_header(\"Content-Length\", str(len(body)))\n        self.end_headers()\n        self.wfile.write(body)\n\n    def do_PUT(self):\n        m = ID_RE.match(self.path)\n        if not m:\n            self.send_response(404)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n            return\n        rid = m.group(1)\n        length = int(self.headers.get(\"Content-Length\", 0))\n        body = self.rfile.read(length) if length else b\"\"\n        path = os.path.join(DATA_DIR, rid)\n        tmp = path + \".tmp\"\n        with open(tmp, \"wb\") as f:\n            f.write(body)\n        os.replace(tmp, path)\n        self.send_response(204)\n        self.send_header(\"Content-Length\", \"0\")\n        self.end_headers()\n\n    def log_message(self, *args):\n        pass\n\n\nif __name__ == \"__main__\":\n    server = ThreadingHTTPServer((\"0.0.0.0\", 8080), Handler)\n    server.daemon_threads = True\n    server.serve_forever()\n",
            "file_path": "/opt/builder/app.py"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "chatcmpl-tool-9567e3d060158192",
          "content": "Successfully wrote to /opt/builder/app.py"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "tool_use",
          "id": "chatcmpl-tool-ac748887bcb07ef7",
          "name": "Bash",
          "input": {
            "command": "systemctl reset-failed builder-app.service; systemctl start builder-app.service; sleep 2; systemctl status builder-app.service --no-pager | head -8; echo \"---health---\"; curl -s -w \" [%{http_code}]\" http://localhost:8080/health; echo; echo \"---put---\"; curl -s -w \"[%{http_code}]\" -X PUT --data-binary \"hello world data\" http://localhost:8080/records/abc; echo; echo \"---get---\"; curl -s -w \" [%{http_code}]\" http://localhost:8080/records/abc; echo",
            "description": "Start service and test endpoints"
          }
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "chatcmpl-tool-a7ff017e1c4fce9d",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Exploring host and service unit",
            "content": "Explore host and existing service unit",
            "status": "in_progress"
          },
          {
            "activeForm": "Implementing HTTP service",
            "content": "Implement /opt/builder/app.py HTTP service",
            "status": "pending"
          },
          {
            "activeForm": "Configuring durable storage",
            "content": "Configure durable storage for records",
            "status": "pending"
          },
          {
            "activeForm": "Starting and verifying service",
            "content": "Start and verify the service and unit",
            "status": "pending"
          },
          {
            "activeForm": "Verifying restart persistence",
            "content": "Verify restart persistence",
            "status": "pending"
          }
        ]
      },
      "output": "Added:\n  + Explore host and existing service unit\n  + Implement /opt/builder/app.py HTTP service\n  + Configure durable storage for records\n  + Start and verify the service and unit\n  + Verify restart persistence\n\nCurrent tasks:\n  ◉ Explore host and existing service unit\n  ○ Implement /opt/builder/app.py HTTP service\n  ○ Configure durable storage for records\n  ○ Start and verify the service and unit\n  ○ Verify restart persistence\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 4988,
      "duration_ms": 0
    },
    {
      "id": "chatcmpl-tool-b8596a94d0a2f37f",
      "name": "Bash",
      "input": {
        "command": "ls -la /opt/builder 2>/dev/null; echo \"---\"; cat /etc/systemd/system/builder-app.service 2>/dev/null; echo \"---\"; systemctl status builder-app.service 2>/dev/null; echo \"---\"; cat /etc/os-release | head -3; echo \"---\"; python3 --version; which python3",
        "description": "Inspect environment and service unit"
      },
      "output": "---\n[Unit]\nAfter=network.target\nDescription=Agent-built application slot\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/54jg0kk0cn5h7j19r0l8x36fmbfywwjj-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/di26b1kkbammy0sj70nq5qzvfrh78wxl-coreutils-9.11/bin:/nix/store/fcqbwp5hx5wh3lzf0457wmf0divknz7y-findutils-4.11.0/bin:/nix/store/aak8d9mrdv9sgn0lcg7xss7wxdg9sqh3-gnugrep-3.12/bin:/nix/store/7mfsmbhsd3arnypipwm251rcd0b45riy-gnused-4.10/bin:/nix/store/r6sz8p6sd6c73fp9z8nzl04dri7lyx8n-systemd-261.1/bin:/nix/store/di26b1kkbammy0sj70nq5qzvfrh78wxl-coreutils-9.11/sbin:/nix/store/fcqbwp5hx5wh3lzf0457wmf0divknz7y-findutils-4.11.0/sbin:/nix/store/aak8d9mrdv9sgn0lcg7xss7wxdg9sqh3-gnugrep-3.12/sbin:/nix/store/7mfsmbhsd3arnypipwm251rcd0b45riy-gnused-4.10/sbin:/nix/store/r6sz8p6sd6c73fp9z8nzl04dri7lyx8n-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/2nndxyf3phkb5aggxm3c16sapa0f49kz-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n---\n× builder-app.service - Agent-built application slot\n     Loaded: loaded (/etc/systemd/system/builder-app.service; enabled; preset: ignored)\n     Active: failed (Result: start-limit-hit) since Fri 2026-08-14 15:01:12 UTC; 13s ago\n   Duration: 67ms\n Invocation: a964b710ceaa497b816a43592080aa77\n    Process: 604 ExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py (code=exited, status=2)\n   Main PID: 604 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.1M\n        CPU: 33ms\n\nAug 14 15:01:12 builder-two systemd[1]: builder-app.service: Scheduled restart job, restart counter is at 5.\nAug 14 15:01:12 builder-two systemd[1]: builder-app.service: Start request repeated too quickly.\nAug 14 15:01:12 builder-two systemd[1]: builder-app.service: Failed with result 'start-limit-hit'.\nAug 14 15:01:12 builder-two systemd[1]: Failed to start Agent-built application slot.\n---\nANSI_COLOR=\"0;38;2;126;186;228\"\nBUG_REPORT_URL=\"https://github.com/NixOS/nixpkgs/issues\"\nBUILD_ID=\"26.11.20260810.2fcb964\"\n---\nPython 3.14.6\n/run/current-system/sw/bin/python3\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 4989,
      "duration_ms": 122
    },
    {
      "id": "chatcmpl-tool-9567e3d060158192",
      "name": "Write",
      "input": {
        "content": "#!/usr/bin/env python3\nimport os\nimport re\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDATA_DIR = \"/opt/builder/data\"\nos.makedirs(DATA_DIR, exist_ok=True)\n\nID_RE = re.compile(r\"^/records/([^/]+)$\")\n\n\nclass Handler(BaseHTTPRequestHandler):\n    protocol_version = \"HTTP/1.1\"\n\n    def _save(self):\n        self.server.shutdown_request(self.request)\n\n    def do_GET(self):\n        if self.path == \"/health\":\n            body = b\"ready\"\n            self.send_response(200)\n            self.send_header(\"Content-Length\", str(len(body)))\n            self.end_headers()\n            self.wfile.write(body)\n            return\n        m = ID_RE.match(self.path)\n        if not m:\n            self.send_response(404)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n            return\n        rid = m.group(1)\n        path = os.path.join(DATA_DIR, rid)\n        if not os.path.isfile(path):\n            self.send_response(404)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n            return\n        with open(path, \"rb\") as f:\n            body = f.read()\n        self.send_response(200)\n        self.send_header(\"Content-Length\", str(len(body)))\n        self.end_headers()\n        self.wfile.write(body)\n\n    def do_PUT(self):\n        m = ID_RE.match(self.path)\n        if not m:\n            self.send_response(404)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n            return\n        rid = m.group(1)\n        length = int(self.headers.get(\"Content-Length\", 0))\n        body = self.rfile.read(length) if length else b\"\"\n        path = os.path.join(DATA_DIR, rid)\n        tmp = path + \".tmp\"\n        with open(tmp, \"wb\") as f:\n            f.write(body)\n        os.replace(tmp, path)\n        self.send_response(204)\n        self.send_header(\"Content-Length\", \"0\")\n        self.end_headers()\n\n    def log_message(self, *args):\n        pass\n\n\nif __name__ == \"__main__\":\n    server = ThreadingHTTPServer((\"0.0.0.0\", 8080), Handler)\n    server.daemon_threads = True\n    server.serve_forever()\n",
        "file_path": "/opt/builder/app.py"
      },
      "output": "Successfully wrote to /opt/builder/app.py",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 16663,
      "duration_ms": 0
    }
  ],
  "timing": {
    "total_duration_ms": 20929,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 4984,
        "status": "completed",
        "usage": {
          "input_tokens": 2898,
          "output_tokens": 346,
          "cache_read_tokens": 2816,
          "cache_creation_tokens": 0,
          "cost_usd": 0.000113896
        }
      },
      {
        "index": 2,
        "started_after_ms": 5112,
        "duration_ms": 11550,
        "status": "completed",
        "usage": {
          "input_tokens": 4311,
          "output_tokens": 724,
          "cache_read_tokens": 2816,
          "cache_creation_tokens": 0,
          "cost_usd": 0.000294976
        }
      },
      {
        "index": 3,
        "started_after_ms": 16663,
        "duration_ms": 4266,
        "status": "completed",
        "usage": {
          "input_tokens": 5103,
          "output_tokens": 203,
          "cache_read_tokens": 4096,
          "cache_creation_tokens": 0,
          "cost_usd": 0.000182636
        }
      }
    ]
  }
}