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      "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."
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          "text": "**Inspecting system services**\n\nI need to implement something on the host and start by inspecting the relevant services. I'm thinking I should use the tools within the commentary area. It may also be necessary to identify specific services involved. My first step will be to look into the /opt directory and also check the systemd services. This structured approach might help clarify what needs to be done!",
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          "input": {
            "todos": [
              {
                "activeForm": "Inspecting the blank host and dormant service unit",
                "content": "Inspect the host layout and builder-app.service configuration",
                "status": "in_progress"
              },
              {
                "activeForm": "Implementing the durable HTTP service",
                "content": "Create /opt/builder/app.py with persistent record storage and required endpoints",
                "status": "pending"
              },
              {
                "activeForm": "Starting and enabling the deployment",
                "content": "Start and enable builder-app.service for reboot persistence",
                "status": "pending"
              },
              {
                "activeForm": "Verifying service behavior and durability",
                "content": "Exercise health and record APIs, then verify persistence across service restart",
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      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_zZtLb006zVNaTebVCMZP7CZc",
          "content": "Added:\n  + Inspect the host layout and builder-app.service configuration\n  + Create /opt/builder/app.py with persistent record storage and required endpoints\n  + Start and enable builder-app.service for reboot persistence\n  + Exercise health and record APIs, then verify persistence across service restart\n\nCurrent tasks:\n  ◉ Inspect the host layout and builder-app.service configuration\n  ○ Create /opt/builder/app.py with persistent record storage and required endpoints\n  ○ Start and enable builder-app.service for reboot persistence\n  ○ Exercise health and record APIs, then verify persistence across service restart\n"
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          }
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            "timeout": 120000
          }
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    {
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      "content": [
        {
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          "tool_use_id": "call_hEp84mOxNyCNiN8C8M79mfAJ",
          "content": "could not resolve path /opt",
          "is_error": true
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_LubPYi5zIFfmYPv1BaLPDxnG",
          "content": "# /etc/systemd/system/builder-app.service -> /nix/store/bkhc7c1djj4z9s51r616fqfbc55zwdvs-unit-builder-app.service/builder-app.service\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--- status ---\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 Thu 2026-08-13 16:20:34 UTC; 5s ago\n   Duration: 78ms\n Invocation: 4c1a794d711841fe97ff77938cd20536\n    Process: 634 ExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py (code=exited, status=2)\n   Main PID: 634 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.3M\n        CPU: 40ms\n\nAug 13 16:20:34 builder-two systemd[1]: builder-app.service: Scheduled restart job, restart counter is at 5.\nAug 13 16:20:34 builder-two systemd[1]: builder-app.service: Start request repeated too quickly.\nAug 13 16:20:34 builder-two systemd[1]: builder-app.service: Failed with result 'start-limit-hit'.\nAug 13 16:20:34 builder-two systemd[1]: Failed to start Agent-built application slot.\n"
        },
        {
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          "tool_use_id": "call_rSaVI5wZLu60qkKjARitzIdM",
          "content": "ls: cannot access '/opt': No such file or directory\nls: cannot access '/opt/builder': No such file or directory\n\n--- mounts ---\n"
        }
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        },
        {
          "type": "tool_use",
          "id": "call_IHRPqAccfejVdfcI36PGUYqb",
          "name": "TodoWrite",
          "input": {
            "todos": [
              {
                "activeForm": "Inspecting the blank host and dormant service unit",
                "content": "Inspect the host layout and builder-app.service configuration",
                "status": "completed"
              },
              {
                "activeForm": "Implementing the durable HTTP service",
                "content": "Create /opt/builder/app.py with persistent record storage and required endpoints",
                "status": "in_progress"
              },
              {
                "activeForm": "Starting and enabling the deployment",
                "content": "Start and enable builder-app.service for reboot persistence",
                "status": "pending"
              },
              {
                "activeForm": "Verifying service behavior and durability",
                "content": "Exercise health and record APIs, then verify persistence across service restart",
                "status": "pending"
              }
            ]
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_IHRPqAccfejVdfcI36PGUYqb",
          "content": "Started:\n  > Implementing the durable HTTP service\nCompleted:\n  ✓ Inspect the host layout and builder-app.service configuration\n\nCurrent tasks:\n  ✓ Inspect the host layout and builder-app.service configuration\n  ◉ Create /opt/builder/app.py with persistent record storage and required endpoints\n  ○ Start and enable builder-app.service for reboot persistence\n  ○ Exercise health and record APIs, then verify persistence across service restart\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "tool_use",
          "id": "call_vrsOAnRZRVye8ZQuAO3iMXSK",
          "name": "Write",
          "input": {
            "content": "#!/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python\n\nimport base64\nimport os\nimport tempfile\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nfrom urllib.parse import unquote, urlsplit\n\nRECORDS_DIR = \"/var/lib/builder-app/records\"\n\n\ndef record_path(record_id):\n    encoded = base64.urlsafe_b64encode(record_id.encode(\"utf-8\")).decode(\"ascii\")\n    return os.path.join(RECORDS_DIR, encoded)\n\n\ndef store_record(record_id, body):\n    fd, temporary = tempfile.mkstemp(dir=RECORDS_DIR, prefix=\".record-\")\n    try:\n        with os.fdopen(fd, \"wb\") as output:\n            output.write(body)\n            output.flush()\n            os.fsync(output.fileno())\n        os.replace(temporary, record_path(record_id))\n        directory_fd = os.open(RECORDS_DIR, os.O_RDONLY | os.O_DIRECTORY)\n        try:\n            os.fsync(directory_fd)\n        finally:\n            os.close(directory_fd)\n    except BaseException:\n        try:\n            os.unlink(temporary)\n        except FileNotFoundError:\n            pass\n        raise\n\n\nclass RequestHandler(BaseHTTPRequestHandler):\n    protocol_version = \"HTTP/1.1\"\n\n    def do_GET(self):\n        path = urlsplit(self.path).path\n        if path == \"/health\":\n            self.send_response(200)\n            self.send_header(\"Content-Length\", \"5\")\n            self.end_headers()\n            self.wfile.write(b\"ready\")\n            return\n\n        record_id = self.record_id(path)\n        if record_id is None:\n            self.send_error(404)\n            return\n        try:\n            with open(record_path(record_id), \"rb\") as record:\n                body = record.read()\n        except FileNotFoundError:\n            self.send_error(404)\n            return\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        path = urlsplit(self.path).path\n        record_id = self.record_id(path)\n        if record_id is None:\n            self.send_error(404)\n            return\n        try:\n            length = int(self.headers[\"Content-Length\"])\n        except (KeyError, TypeError, ValueError):\n            self.send_error(411)\n            return\n        if length < 0:\n            self.send_error(400)\n            return\n        body = self.rfile.read(length)\n        if len(body) != length:\n            self.send_error(400)\n            return\n        store_record(record_id, body)\n        self.send_response(204)\n        self.send_header(\"Content-Length\", \"0\")\n        self.end_headers()\n\n    @staticmethod\n    def record_id(path):\n        prefix = \"/records/\"\n        if not path.startswith(prefix):\n            return None\n        raw_id = path[len(prefix):]\n        if not raw_id or \"/\" in raw_id:\n            return None\n        try:\n            return unquote(raw_id, encoding=\"utf-8\", errors=\"strict\")\n        except UnicodeDecodeError:\n            return None\n\n    def log_message(self, format_string, *args):\n        return\n\n\nif __name__ == \"__main__\":\n    os.makedirs(RECORDS_DIR, mode=0o755, exist_ok=True)\n    server = ThreadingHTTPServer((\"0.0.0.0\", 8080), RequestHandler)\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": "call_vrsOAnRZRVye8ZQuAO3iMXSK",
          "content": "Successfully wrote to /opt/builder/app.py"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "details": [
            {
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              "format": "openai-responses-v1",
              "id": "rs_087d5d2f8b7c6823016a7deee80f9c81939d8406f13b63164b",
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          ]
        },
        {
          "type": "tool_use",
          "id": "call_z21p2GDk4a77pq4w6d294Pz2",
          "name": "Bash",
          "input": {
            "command": "python3 -m py_compile /opt/builder/app.py && stat -c '%A %U:%G %n' /opt/builder/app.py /opt/builder",
            "description": "Validate application syntax and permissions",
            "timeout": 120000
          }
        },
        {
          "type": "tool_use",
          "id": "call_uuHwFP8NJ0WNoksyjVLxgWDt",
          "name": "Bash",
          "input": {
            "command": "ss -ltnp '( sport = :8080 )' || true",
            "description": "Check whether port 8080 is already occupied",
            "timeout": 120000
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_z21p2GDk4a77pq4w6d294Pz2",
          "content": "-rw-r--r-- root:root /opt/builder/app.py\ndrwxr-xr-x root:root /opt/builder\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_uuHwFP8NJ0WNoksyjVLxgWDt",
          "content": "State Recv-Q Send-Q Local Address:Port Peer Address:PortProcess\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "**Initiating Python compile**\n\nI have a potential Python compilation that created a pycache in the /opt builder. It seems like everything is okay, so now I need to start the process. I should stay focused to ensure that I properly initiate the compilation and check for any potential issues along the way. It's all about maintaining that clarity to avoid any hiccups as I move forward. Let's see how this goes!",
          "details": [
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              "summary": "**Initiating Python compile**\n\nI",
              "type": "reasoning.summary"
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              "summary": " have",
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              "summary": " Python",
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              "summary": " compilation",
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              "summary": " created",
              "type": "reasoning.summary"
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              "type": "reasoning.summary"
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              "summary": "cache",
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              "summary": " builder",
              "type": "reasoning.summary"
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            {
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              "summary": ".",
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              "format": "openai-responses-v1",
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              "type": "reasoning.summary"
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              "format": "openai-responses-v1",
              "index": 0,
              "summary": " which",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " should",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " return",
              "type": "reasoning.summary"
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            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " quickly",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": ".",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " It",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " might",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " be",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " best",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " to",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " wait",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " for",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " confirmation",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " or",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " a",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " timeout",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " before",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " doing",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " anything",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " explicit",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": ".",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " Let's",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " get",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " this",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": " right",
              "type": "reasoning.summary"
            },
            {
              "format": "openai-responses-v1",
              "index": 0,
              "summary": "!",
              "type": "reasoning.summary"
            },
            {
              "data": "gAAAAABqfe8A_lKJni9hZfzlr6BTdUY04tG4GYtjxHxZxVnUyPeWPJtncXqdpTellgrwrnH4hB-jg4f5do2RdrcBhgeiu96LUHdwNc68RtsClQnf4H0sI6MLAYVJ7zyg3MFFntMN-Q6un-PHrj7CDQYxaP9PvKKlF71nrS8dCR5G6QsoYlzfQPWLwwukljBhPsDfgCr8FveDsCHfv9NNYtvtrYKONSCTjkb4SQGakU8uhwNKm9Go-BMsTlyEVrBM8mlvMBRKCQqIvievzHKpv0VlcQf8wMMfZy0VmOHulJAHQFkOZeQFF0KFwtlc3WMgTdDiDWq7Ab1lu3XMTWuMe05TTFJkYybD7QRMr51yHNxJcNsD_nfJVWEZk3ZqTA8WqrkN2ih66KAU_GHGqPZCVsXXANQ9hBtXBzDOQOQJDD1o2JvU75iHJyPSTBSAfN83zvRuUTUFNhGrJpMlEX6gMR-zGFYJMGarK40uZIZlkK5sF4LsBW5lJF_ANeIdTIdXFI1sGSoCoh-uL3BqcpfMXo9Rqtsd6KToREUJhEMcADkNH1LeFhP5DZKNIcr4VoUv62gltJLSs1cSaa58-8Whhu3UuUnLjeIMhMPTLgViK97AQqpoXhcCqUNs_d-DCIy7OgMcfdqBJWCbublASxJy-6gxGrpxCFYc6k53sTzMkzu2JDwQoBifOnXi7UGVEdDYLQHd8yDbVavc8h2yhSxMGeDjv014QKt0plmRt5R2mVOYaQmipuYnNOTE8zK3SjRw1f1P7sOiyeVcum3gxtZ0oVvKgEZOZOYvMrnKm-UDFgSwiYZ8_G9FsljeMxdOi6ATc-mHYceyiH7ZNG0mjYA31s9Y2-4XXjFCSh7CQL8Ec9bRp1BR3uBzpWCGzYVI3fFBFsuMJKKqKRXES7BzUfFHLv3B_qRlAlwfzvMtjijYt-MOCzesVUQ0CohyChg1b70eYKEONAjso8dJg4w7CuFbYwSEHTClj7VMrgBXgjbOP_3xP7VUhch1IwZx2HtuMJzav9F45inhGpYdaM9dFEtzOhaLzpQjn7megtSSNRxHliw_ya1RfOTbXpHzvIDDJguGcB5-AA1IL7hpD6oc4fp2_t82Bshac1qUJqnsy3dSil2-hjBxwBgBOO-aGBft7GBRIrg4QI1kMKc-teZ0rwant98yQ0NCMZKv5XMglgGrAB6UURIV9OMUPLpF4ZZrDDKzhYsal5CTcIwgQBC1IHO9OONzRKrqJ9jRW12wdAdvgaV-bNVrOe7H_xzgTLK2SR9zXTsLc6KY3rZU-mS7EVooFu2Vga1hrB4Z8iiskQFheZesNqXG7tVhinI=.eyJlbmRwb2ludF9zbHVnIjoib3BlbmFpL2dwdC01LjYtbHVuYS0yMDI2MDcwOXxvcGVuYWkifQ",
              "format": "openai-responses-v1",
              "id": "rs_087d5d2f8b7c6823016a7deefdd8308193bdc3d6572b85939d",
              "index": 1,
              "type": "reasoning.encrypted"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "call_YmfDFaehsnKy6twf0JnshbFX",
          "name": "Bash",
          "input": {
            "command": "systemctl reboot",
            "description": "Reboot the host to verify boot-time recovery",
            "timeout": 120000
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_YmfDFaehsnKy6twf0JnshbFX",
          "content": ""
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "call_zZtLb006zVNaTebVCMZP7CZc",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Inspecting the blank host and dormant service unit",
            "content": "Inspect the host layout and builder-app.service configuration",
            "status": "in_progress"
          },
          {
            "activeForm": "Implementing the durable HTTP service",
            "content": "Create /opt/builder/app.py with persistent record storage and required endpoints",
            "status": "pending"
          },
          {
            "activeForm": "Starting and enabling the deployment",
            "content": "Start and enable builder-app.service for reboot persistence",
            "status": "pending"
          },
          {
            "activeForm": "Verifying service behavior and durability",
            "content": "Exercise health and record APIs, then verify persistence across service restart",
            "status": "pending"
          }
        ]
      },
      "output": "Added:\n  + Inspect the host layout and builder-app.service configuration\n  + Create /opt/builder/app.py with persistent record storage and required endpoints\n  + Start and enable builder-app.service for reboot persistence\n  + Exercise health and record APIs, then verify persistence across service restart\n\nCurrent tasks:\n  ◉ Inspect the host layout and builder-app.service configuration\n  ○ Create /opt/builder/app.py with persistent record storage and required endpoints\n  ○ Start and enable builder-app.service for reboot persistence\n  ○ Exercise health and record APIs, then verify persistence across service restart\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 3296,
      "duration_ms": 0
    },
    {
      "id": "call_hEp84mOxNyCNiN8C8M79mfAJ",
      "name": "Glob",
      "input": {
        "include_build_dirs": true,
        "include_hidden": true,
        "path": "/opt",
        "pattern": "**/*"
      },
      "output": "could not resolve path /opt",
      "is_error": true,
      "read_only": true,
      "started_after_ms": 5871,
      "duration_ms": 0
    },
    {
      "id": "call_LubPYi5zIFfmYPv1BaLPDxnG",
      "name": "Bash",
      "input": {
        "command": "systemctl cat builder-app.service && printf '\\n--- status ---\\n' && systemctl status builder-app.service --no-pager || true",
        "description": "Inspect dormant systemd service",
        "timeout": 120000
      },
      "output": "# /etc/systemd/system/builder-app.service -> /nix/store/bkhc7c1djj4z9s51r616fqfbc55zwdvs-unit-builder-app.service/builder-app.service\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--- status ---\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 Thu 2026-08-13 16:20:34 UTC; 5s ago\n   Duration: 78ms\n Invocation: 4c1a794d711841fe97ff77938cd20536\n    Process: 634 ExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py (code=exited, status=2)\n   Main PID: 634 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.3M\n        CPU: 40ms\n\nAug 13 16:20:34 builder-two systemd[1]: builder-app.service: Scheduled restart job, restart counter is at 5.\nAug 13 16:20:34 builder-two systemd[1]: builder-app.service: Start request repeated too quickly.\nAug 13 16:20:34 builder-two systemd[1]: builder-app.service: Failed with result 'start-limit-hit'.\nAug 13 16:20:34 builder-two systemd[1]: Failed to start Agent-built application slot.\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 5871,
      "duration_ms": 211
    },
    {
      "id": "call_rSaVI5wZLu60qkKjARitzIdM",
      "name": "Bash",
      "input": {
        "command": "ls -la /opt /opt/builder 2>&1 || true; printf '\\n--- mounts ---\\n'; findmnt /opt /var/lib 2>/dev/null || true",
        "description": "Inspect application directories and storage",
        "timeout": 120000
      },
      "output": "ls: cannot access '/opt': No such file or directory\nls: cannot access '/opt/builder': No such file or directory\n\n--- mounts ---\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 6082,
      "duration_ms": 67
    },
    {
      "id": "call_IHRPqAccfejVdfcI36PGUYqb",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Inspecting the blank host and dormant service unit",
            "content": "Inspect the host layout and builder-app.service configuration",
            "status": "completed"
          },
          {
            "activeForm": "Implementing the durable HTTP service",
            "content": "Create /opt/builder/app.py with persistent record storage and required endpoints",
            "status": "in_progress"
          },
          {
            "activeForm": "Starting and enabling the deployment",
            "content": "Start and enable builder-app.service for reboot persistence",
            "status": "pending"
          },
          {
            "activeForm": "Verifying service behavior and durability",
            "content": "Exercise health and record APIs, then verify persistence across service restart",
            "status": "pending"
          }
        ]
      },
      "output": "Started:\n  > Implementing the durable HTTP service\nCompleted:\n  ✓ Inspect the host layout and builder-app.service configuration\n\nCurrent tasks:\n  ✓ Inspect the host layout and builder-app.service configuration\n  ◉ Create /opt/builder/app.py with persistent record storage and required endpoints\n  ○ Start and enable builder-app.service for reboot persistence\n  ○ Exercise health and record APIs, then verify persistence across service restart\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 14616,
      "duration_ms": 0
    },
    {
      "id": "call_vrsOAnRZRVye8ZQuAO3iMXSK",
      "name": "Write",
      "input": {
        "content": "#!/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python\n\nimport base64\nimport os\nimport tempfile\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nfrom urllib.parse import unquote, urlsplit\n\nRECORDS_DIR = \"/var/lib/builder-app/records\"\n\n\ndef record_path(record_id):\n    encoded = base64.urlsafe_b64encode(record_id.encode(\"utf-8\")).decode(\"ascii\")\n    return os.path.join(RECORDS_DIR, encoded)\n\n\ndef store_record(record_id, body):\n    fd, temporary = tempfile.mkstemp(dir=RECORDS_DIR, prefix=\".record-\")\n    try:\n        with os.fdopen(fd, \"wb\") as output:\n            output.write(body)\n            output.flush()\n            os.fsync(output.fileno())\n        os.replace(temporary, record_path(record_id))\n        directory_fd = os.open(RECORDS_DIR, os.O_RDONLY | os.O_DIRECTORY)\n        try:\n            os.fsync(directory_fd)\n        finally:\n            os.close(directory_fd)\n    except BaseException:\n        try:\n            os.unlink(temporary)\n        except FileNotFoundError:\n            pass\n        raise\n\n\nclass RequestHandler(BaseHTTPRequestHandler):\n    protocol_version = \"HTTP/1.1\"\n\n    def do_GET(self):\n        path = urlsplit(self.path).path\n        if path == \"/health\":\n            self.send_response(200)\n            self.send_header(\"Content-Length\", \"5\")\n            self.end_headers()\n            self.wfile.write(b\"ready\")\n            return\n\n        record_id = self.record_id(path)\n        if record_id is None:\n            self.send_error(404)\n            return\n        try:\n            with open(record_path(record_id), \"rb\") as record:\n                body = record.read()\n        except FileNotFoundError:\n            self.send_error(404)\n            return\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        path = urlsplit(self.path).path\n        record_id = self.record_id(path)\n        if record_id is None:\n            self.send_error(404)\n            return\n        try:\n            length = int(self.headers[\"Content-Length\"])\n        except (KeyError, TypeError, ValueError):\n            self.send_error(411)\n            return\n        if length < 0:\n            self.send_error(400)\n            return\n        body = self.rfile.read(length)\n        if len(body) != length:\n            self.send_error(400)\n            return\n        store_record(record_id, body)\n        self.send_response(204)\n        self.send_header(\"Content-Length\", \"0\")\n        self.end_headers()\n\n    @staticmethod\n    def record_id(path):\n        prefix = \"/records/\"\n        if not path.startswith(prefix):\n            return None\n        raw_id = path[len(prefix):]\n        if not raw_id or \"/\" in raw_id:\n            return None\n        try:\n            return unquote(raw_id, encoding=\"utf-8\", errors=\"strict\")\n        except UnicodeDecodeError:\n            return None\n\n    def log_message(self, format_string, *args):\n        return\n\n\nif __name__ == \"__main__\":\n    os.makedirs(RECORDS_DIR, mode=0o755, exist_ok=True)\n    server = ThreadingHTTPServer((\"0.0.0.0\", 8080), RequestHandler)\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": 20437,
      "duration_ms": 0
    },
    {
      "id": "call_z21p2GDk4a77pq4w6d294Pz2",
      "name": "Bash",
      "input": {
        "command": "python3 -m py_compile /opt/builder/app.py && stat -c '%A %U:%G %n' /opt/builder/app.py /opt/builder",
        "description": "Validate application syntax and permissions",
        "timeout": 120000
      },
      "output": "-rw-r--r-- root:root /opt/builder/app.py\ndrwxr-xr-x root:root /opt/builder\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 24044,
      "duration_ms": 307
    },
    {
      "id": "call_uuHwFP8NJ0WNoksyjVLxgWDt",
      "name": "Bash",
      "input": {
        "command": "ss -ltnp '( sport = :8080 )' || true",
        "description": "Check whether port 8080 is already occupied",
        "timeout": 120000
      },
      "output": "State Recv-Q Send-Q Local Address:Port Peer Address:PortProcess\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 24351,
      "duration_ms": 37
    },
    {
      "id": "call_6XHat7CoAfuwqjr8CUI9agux",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Inspecting the blank host and dormant service unit",
            "content": "Inspect the host layout and builder-app.service configuration",
            "status": "completed"
          },
          {
            "activeForm": "Implementing the durable HTTP service",
            "content": "Create /opt/builder/app.py with persistent record storage and required endpoints",
            "status": "completed"
          },
          {
            "activeForm": "Starting and enabling the deployment",
            "content": "Start and enable builder-app.service for reboot persistence",
            "status": "in_progress"
          },
          {
            "activeForm": "Verifying service behavior and durability",
            "content": "Exercise health and record APIs, then verify persistence across service restart",
            "status": "pending"
          }
        ]
      },
      "output": "Started:\n  > Starting and enabling the deployment\nCompleted:\n  ✓ Create /opt/builder/app.py with persistent record storage and required endpoints\n\nCurrent tasks:\n  ✓ Inspect the host layout and builder-app.service configuration\n  ✓ Create /opt/builder/app.py with persistent record storage and required endpoints\n  ◉ Start and enable builder-app.service for reboot persistence\n  ○ Exercise health and record APIs, then verify persistence across service restart\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 27182,
      "duration_ms": 0
    },
    {
      "id": "call_keC66aXuQs6yTCQIECyw8GHS",
      "name": "Bash",
      "input": {
        "command": "systemctl reset-failed builder-app.service && systemctl enable builder-app.service && systemctl start builder-app.service && systemctl status builder-app.service --no-pager",
        "description": "Enable and start the application service",
        "timeout": 120000
      },
      "output": "● builder-app.service - Agent-built application slot\n     Loaded: loaded (/etc/systemd/system/builder-app.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-08-13 16:21:02 UTC; 17ms ago\n Invocation: ea29de5244af4b8eb98b5dc22070d6f0\n   Main PID: 728 (python)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 2M (peak: 2M)\n        CPU: 6ms\n     CGroup: /system.slice/builder-app.service\n             └─728 /nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py\n\nAug 13 16:21:02 builder-two systemd[1]: Started Agent-built application slot.\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 28691,
      "duration_ms": 454
    },
    {
      "id": "call_M2aSPiSnOCfmgOqxsueC2Sqw",
      "name": "Bash",
      "input": {
        "command": "set -e\nhealth=$(curl --fail --silent --show-error --dump-header /tmp/health.headers http://127.0.0.1:8080/health)\nprintf 'health-body=<%s>\\n' \"$health\"\nawk 'NR==1 { print \"health-status=\" $2 }' /tmp/health.headers\nprintf 'health-bytes='; printf '%s' \"$health\" | wc -c\n",
        "description": "Verify health endpoint status and exact body",
        "timeout": 120000
      },
      "output": "health-body=<ready>\nhealth-status=200\nhealth-bytes=5\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 34973,
      "duration_ms": 80
    },
    {
      "id": "call_H6gxwbM3DwKWvLoU8RzvgIYZ",
      "name": "Bash",
      "input": {
        "command": "set -e\nbody='durable payload: 2026-08-13'\nprintf '%s' \"$body\" | curl --fail --silent --show-error --request PUT --data-binary @- --dump-header /tmp/put.headers http://127.0.0.1:8080/records/smoke-test\nawk 'NR==1 { print \"put-status=\" $2 }' /tmp/put.headers\ncurl --fail --silent --show-error --dump-header /tmp/get.headers http://127.0.0.1:8080/records/smoke-test > /tmp/get.body\nawk 'NR==1 { print \"get-status=\" $2 }' /tmp/get.headers\nprintf 'get-body='; cat /tmp/get.body; printf '\\nget-bytes='; wc -c < /tmp/get.body\n",
        "description": "Verify record write and exact read behavior",
        "timeout": 120000
      },
      "output": "put-status=204\nget-status=200\nget-body=durable payload: 2026-08-13\nget-bytes=27\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 35053,
      "duration_ms": 79
    },
    {
      "id": "call_mGieK0try2jz6wh7UW2r3d6r",
      "name": "Bash",
      "input": {
        "command": "systemctl is-enabled builder-app.service && systemctl is-active builder-app.service && ss -ltnp '( sport = :8080 )'",
        "description": "Verify enabled service and listening socket",
        "timeout": 120000
      },
      "output": "enabled\nactive\nState  Recv-Q Send-Q Local Address:Port Peer Address:PortProcess\nLISTEN 0      5            0.0.0.0:8080      0.0.0.0:*    users:((\"python\",pid=728,fd=3))\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 35133,
      "duration_ms": 29
    },
    {
      "id": "call_bqc6eJwFbElNdlwbBtvz3xHV",
      "name": "Bash",
      "input": {
        "command": "systemctl restart builder-app.service && sleep 1 && curl --fail --silent --show-error http://127.0.0.1:8080/records/smoke-test > /tmp/after-restart.body && printf 'after-restart-body=' && cat /tmp/after-restart.body && printf '\\n' && systemctl is-active builder-app.service",
        "description": "Verify records survive an application service restart",
        "timeout": 120000
      },
      "output": "after-restart-body=durable payload: 2026-08-13\nactive\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 41090,
      "duration_ms": 1170
    },
    {
      "id": "call_YmfDFaehsnKy6twf0JnshbFX",
      "name": "Bash",
      "input": {
        "command": "systemctl reboot",
        "description": "Reboot the host to verify boot-time recovery",
        "timeout": 120000
      },
      "output": "",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 45681,
      "duration_ms": 47
    }
  ],
  "timing": {
    "total_duration_ms": 45728,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 3295,
        "status": "completed",
        "usage": {
          "input_tokens": 2144,
          "output_tokens": 170,
          "cache_read_tokens": 2141,
          "cache_creation_tokens": 0,
          "cost_usd": 0.00012371
        }
      },
      {
        "index": 2,
        "started_after_ms": 3297,
        "duration_ms": 2571,
        "status": "completed",
        "usage": {
          "input_tokens": 2444,
          "output_tokens": 171,
          "cache_read_tokens": 2141,
          "cache_creation_tokens": 300,
          "cost_usd": 0.00016181
        }
      },
      {
        "index": 3,
        "started_after_ms": 6150,
        "duration_ms": 8465,
        "status": "completed",
        "usage": {
          "input_tokens": 3572,
          "output_tokens": 652,
          "cache_read_tokens": 2441,
          "cache_creation_tokens": 1128,
          "cost_usd": 0.00055691
        }
      },
      {
        "index": 4,
        "started_after_ms": 14616,
        "duration_ms": 5820,
        "status": "completed",
        "usage": {
          "input_tokens": 4321,
          "output_tokens": 892,
          "cache_read_tokens": 3569,
          "cache_creation_tokens": 749,
          "cost_usd": 0.000664815
        }
      },
      {
        "index": 5,
        "started_after_ms": 20438,
        "duration_ms": 3603,
        "status": "completed",
        "usage": {
          "input_tokens": 5232,
          "output_tokens": 268,
          "cache_read_tokens": 4318,
          "cache_creation_tokens": 911,
          "cost_usd": 0.000318155
        }
      },
      {
        "index": 6,
        "started_after_ms": 24389,
        "duration_ms": 2792,
        "status": "completed",
        "usage": {
          "input_tokens": 5566,
          "output_tokens": 155,
          "cache_read_tokens": 5229,
          "cache_creation_tokens": 334,
          "cost_usd": 0.00018734
        }
      },
      {
        "index": 7,
        "started_after_ms": 27183,
        "duration_ms": 1506,
        "status": "completed",
        "usage": {
          "input_tokens": 5822,
          "output_tokens": 64,
          "cache_read_tokens": 5563,
          "cache_creation_tokens": 256,
          "cost_usd": 0.00012633
        }
      },
      {
        "index": 8,
        "started_after_ms": 29145,
        "duration_ms": 5826,
        "status": "completed",
        "usage": {
          "input_tokens": 6126,
          "output_tokens": 598,
          "cache_read_tokens": 5819,
          "cache_creation_tokens": 304,
          "cost_usd": 0.00045529
        }
      },
      {
        "index": 9,
        "started_after_ms": 35162,
        "duration_ms": 5923,
        "status": "completed",
        "usage": {
          "input_tokens": 6864,
          "output_tokens": 379,
          "cache_read_tokens": 6123,
          "cache_creation_tokens": 738,
          "cost_usd": 0.00038118
        }
      },
      {
        "index": 10,
        "started_after_ms": 42261,
        "duration_ms": 3417,
        "status": "completed",
        "usage": {
          "input_tokens": 7273,
          "output_tokens": 103,
          "cache_read_tokens": 6861,
          "cache_creation_tokens": 409,
          "cost_usd": 0.000181835
        }
      }
    ]
  }
}