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                "activeForm": "Inspecting the host and deployment slot",
                "content": "Inspect the host and existing builder service unit",
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              {
                "activeForm": "Implementing the HTTP record service",
                "content": "Implement the durable HTTP service at /opt/builder/app.py",
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          "content": "Added:\n  + Inspect the host and existing builder service unit\n  + Implement the durable HTTP service at /opt/builder/app.py\n  + Start the existing unit and verify persistence and reboot durability\n\nCurrent tasks:\n  ◉ Inspect the host and existing builder service unit\n  ○ Implement the durable HTTP service at /opt/builder/app.py\n  ○ Start the existing unit and verify persistence and reboot durability\n"
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          "content": "/root\n\n-- root --\ntotal 64\ndrwxr-xr-x  17 root root  4096 Aug 14 14:59 .\ndrwxr-xr-x  17 root root  4096 Aug 14 14:59 ..\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 bin\ndrwxr-xr-x  17 root root  3260 Aug 14 14:59 dev\ndrwxr-xr-x  21 root root  4096 Aug 14 14:59 etc\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 home\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 lib64\ndrwx------   2 root root 16384 Aug 14 14:59 lost+found\ndrwxr-xr-x   6 root root  4096 Aug 14 14:59 nix\ndr-xr-xr-x 102 root root     0 Aug 14 14:59 proc\ndrwx------   5 root root  4096 Aug 14 14:59 root\ndrwxr-xr-x  19 root root   500 Aug 14 14:59 run\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 srv\ndr-xr-xr-x  13 root root     0 Aug 14 14:59 sys\ndrwxrwxrwt  11 root root  4096 Aug 14 14:59 tmp\ndrwxr-xr-x   3 root root  4096 Aug 14 14:59 usr\ndrwxr-xr-x   9 root root  4096 Aug 14 14:59 var\n\n-- opt --\nls: cannot access '/opt': No such file or directory\n\n-- builder --\nls: cannot access '/opt/builder': No such file or directory\n\nExit code: exit status: 2",
          "is_error": true
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          "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 Fri 2026-08-14 14:59:37 UTC; 9s ago\n   Duration: 140ms\n Invocation: f81e620f0ff74127bd207060d1d002d8\n    Process: 627 ExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py (code=exited, status=2)\n   Main PID: 627 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.2M\n        CPU: 71ms\n\nAug 14 14:59:37 builder-two systemd[1]: builder-app.service: Scheduled restart job, restart counter is at 5.\nAug 14 14:59:37 builder-two systemd[1]: builder-app.service: Start request repeated too quickly.\nAug 14 14:59:37 builder-two systemd[1]: builder-app.service: Failed with result 'start-limit-hit'.\nAug 14 14:59:37 builder-two systemd[1]: Failed to start Agent-built application slot.\n\nExit code: exit status: 3",
          "is_error": true
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_kJd8Imzv704stCMbHb1Yv5tx",
          "content": "uid=0(root) gid=0(root) groups=0(root)\n\n-- python --\n/run/current-system/sw/bin/python3\nPython 3.14.6\n\n-- port --\nState  Recv-Q Send-Q Local Address:Port  Peer Address:PortProcess\nLISTEN 0      4096         0.0.0.0:5355       0.0.0.0:*    users:((\"systemd-resolve\",pid=297,fd=14))\nLISTEN 0      128        127.0.0.1:18002      0.0.0.0:*    users:((\"sshd-session\",pid=624,fd=10))\nLISTEN 0      4096   127.0.0.53%lo:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=297,fd=23))\nLISTEN 0      128          0.0.0.0:22         0.0.0.0:*    users:((\"sshd\",pid=582,fd=6))\nLISTEN 0      4096      127.0.0.54:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=297,fd=25))\nLISTEN 0      4096            [::]:5355          [::]:*    users:((\"systemd-resolve\",pid=297,fd=16))\nLISTEN 0      128             [::]:22            [::]:*    users:((\"sshd\",pid=582,fd=7))\n"
        }
      ]
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            "content": "#!/usr/bin/env python3\n\"\"\"Small durable HTTP record service for the builder deployment slot.\"\"\"\n\nimport os\nimport sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nfrom urllib.parse import unquote, urlsplit\n\n\nHOST = \"0.0.0.0\"\nPORT = 8080\nDATA_DIR = \"/var/lib/builder-app\"\nDATABASE = os.path.join(DATA_DIR, \"records.sqlite3\")\n\n\nclass RecordHandler(BaseHTTPRequestHandler):\n    protocol_version = \"HTTP/1.1\"\n\n    def _send(self, status, body=b\"\", content_type=None):\n        self.send_response(status)\n        if content_type is not None:\n            self.send_header(\"Content-Type\", content_type)\n        self.send_header(\"Content-Length\", str(len(body)))\n        self.end_headers()\n        if body:\n            self.wfile.write(body)\n\n    def _record_id(self):\n        path = urlsplit(self.path).path\n        parts = path.split(\"/\")\n        if len(parts) != 3 or parts[1] != \"records\" or not parts[2]:\n            return None\n        try:\n            return unquote(parts[2], errors=\"strict\")\n        except UnicodeDecodeError:\n            return None\n\n    def _read_body(self):\n        value = self.headers.get(\"Content-Length\")\n        if value is None:\n            return None\n        try:\n            length = int(value)\n        except ValueError:\n            return None\n        if length < 0:\n            return None\n        return self.rfile.read(length)\n\n    def do_GET(self):\n        if urlsplit(self.path).path == \"/health\":\n            self._send(200, b\"ready\", \"text/plain\")\n            return\n\n        record_id = self._record_id()\n        if record_id is None:\n            self._send(404)\n            return\n\n        with sqlite3.connect(DATABASE) as connection:\n            row = connection.execute(\n                \"SELECT body FROM records WHERE id = ?\", (record_id,)\n            ).fetchone()\n        if row is None:\n            self._send(404)\n        else:\n            self._send(200, bytes(row[0]), \"application/octet-stream\")\n\n    def do_PUT(self):\n        record_id = self._record_id()\n        if record_id is None:\n            self._send(404)\n            return\n\n        body = self._read_body()\n        if body is None:\n            self._send(400)\n            return\n\n        with sqlite3.connect(DATABASE) as connection:\n            connection.execute(\n                \"INSERT INTO records (id, body) VALUES (?, ?) \"\n                \"ON CONFLICT(id) DO UPDATE SET body = excluded.body\",\n                (record_id, body),\n            )\n        self._send(204)\n\n    def log_message(self, format, *args):\n        print(\"%s - - [%s] %s\" % (self.address_string(), self.log_date_time_string(), format % args), flush=True)\n\n\ndef main():\n    os.makedirs(DATA_DIR, exist_ok=True)\n    with sqlite3.connect(DATABASE) as connection:\n        connection.execute(\"PRAGMA journal_mode = WAL\")\n        connection.execute(\"PRAGMA synchronous = FULL\")\n        connection.execute(\n            \"CREATE TABLE IF NOT EXISTS records \"\n            \"(id TEXT PRIMARY KEY NOT NULL, body BLOB NOT NULL)\"\n        )\n\n    server = ThreadingHTTPServer((HOST, PORT), RecordHandler)\n    server.serve_forever()\n\n\nif __name__ == \"__main__\":\n    main()\n",
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              "data": "gAAAAABqfy18wIbN_gzfZg0Dsiru9W6pXhiP0n-J2LhT5BQ4k1UjlJ7NpEjn8eCN6T08WWKPJD0sSLsSqPfIPaFD8Qk6PnbUHZLLTXlUFiXPGMBuCgqa7psIrDMPM8yF-kHl9jfzUYl9X0Y3jzF7ULDMAhT3sdSGbizFPqEeW9CcLIWjel9la7ApbuzP89zxhBo1R3K0C0OXmIT5FNCRq9R3fRzE1TIqRSSZX2_Mubvrg6d5k3-T8n9kIJkvHXQvza6_c_V7odxeL3-_yaB1gqLFifDK6CvYV6uUVRFl0wrXLr0UFjBgc6h87uhRlea6L6twmEbD30o8m0xpCC5UNgFClFiAvoIkXFkyvJa1HuF7YrgWsAAX8KpNoQnSQ18xIuO_yuBL_N-FAcOOggk6EAIhJAGOWTp08hIiMENzPBF9OHcFoz9aozHhWHcmBwxbALOjyT88fY5kkTIga7g6GtDrjp6E3JKCpM_MuM5-E3k_iJCxUAmNpT4-QzF5OV3WmTsxquW9VZMWvHSrtKwFyDIy-zTK-GJH1sBNo3ccVAdJVwg8ikUZjqi8L4H59Al2iM_yYJYqWlxOhItn35AfnYwy3ubeU_SQKyYniIuPOowhmHWOXF774GH5VeN-5hZCstrhETmHKvEGoRKxjZawYrfxMgudFYQhQy7gFaXvXCyM8SO52cm758DAGsQimKhACXzV-R05NihbPiOQu-ypeQGWXiJfoItztnDvu4DhiwtuCOq-xKE5YwF1IsGtvJsnldFmcvWfJzmKYHBdVDsIY7pb_zv_trgkFV2JQ2O1NxkN_CY7GF-xlRuT3llrjy9e6kKdQu9Z2XxAg6oroEK0mb7JYJP7TIrLy9p2MuNHnRanRxI5h4Qk3W7qsVLb8UR9b3sN_0VM4Wa1aDUmfyGIJFWc1epOwtnYQQfgy-Ay8rvGvvFEVsHDlsX5ujmfifGBvjyE0bi_N-eYhxI_AMymO538HZJFdQbZTzkdBVPm6SfwwyWNh2BwJPZvk8vQClblOmPTxY_QnOq_YAFmGQC1w3ZxR4SlsQxsKn56_FfNN5Eogge-rJvPHpV6r4pMDrt0wc3_u8LyOUdaPGXMq9g28vUx8uPSfKCnl-crSiISKlhCQ9JaYOa89JoHrTY89KvGj_8E66WyClHewR9AeBypZ0RPPXRgwFH-Af7l2WZw50OiW-NSW40-eJ9jNmcXRzr52xUcynBOw9pG89UJMN3p8ffdalmgiqsZ3k5IXzpwpnYW5cypUUGeW4syVA5sR8SyWu5qKg79U-VBILwuqKpeRXWmMWH5H_SBdHWFEn-3jOdAwYQQxBVxzI3GSPLmUHUKe079YdZNAsvkBojOYJ_0IDiqI23cbwsUPNNi7rgD2WSfnvQE6_jVrcFEqab1_nnjqGU_-xs-rBHIop2rJuqaoHoGD1N7dwsLMswySDweojdA5WuV6CIPLkGHr8lTZAX8pKMESD-h5jjKADe8Hqc1EXxq007T4s6PfuVrJUfNpvXaCODMIHtsNOTlgDpGIT3cIIE5cB93616gOYpGq5LlQFdsHCUIKytE95Y3Mbvv9FmfeXRnvdnxbW1dR0RXhdRM8xSv2jz3GDq1EPd7UqxctEsQGw98NXAREhWPBz-EuUZlwp66ukCsNjHeUhme0Q8ycuR9UukhrpWJZo_Gnz9HCu7Z4l6ZZ0oGqDJ_4CNxf12CGNrvUp9nsNIMExwPC5mJDoHDZdyS1Do2O1bKSgpWyzgzGqgSCwgCjyeNo6x2omVujZeZWQI4C6uY0AppI7rkmpbZ8w5jVKLKAzNtTh58bQa9oG9lLrLcYA==.eyJlbmRwb2ludF9zbHVnIjoib3BlbmFpL2dwdC01LjYtbHVuYS0yMDI2MDcwOXxvcGVuYWkifQ",
              "format": "openai-responses-v1",
              "id": "rs_020b567ad488ff94016a7f2d79f11481908cc8e99fe5aa5738",
              "index": 1,
              "type": "reasoning.encrypted"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "call_CpHsrCP3miE5dOYVwb43OoZ6",
          "name": "Bash",
          "input": {
            "command": "set -e\n/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python -m py_compile /opt/builder/app.py\nsystemctl reset-failed builder-app.service\nsystemctl start builder-app.service\nsleep 1\nsystemctl is-active builder-app.service\nsystemctl is-enabled builder-app.service\nsystemctl status builder-app.service --no-pager",
            "description": "Validate the app and start the builder service",
            "timeout": 120000
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_CpHsrCP3miE5dOYVwb43OoZ6",
          "content": "active\nenabled\n● builder-app.service - Agent-built application slot\n     Loaded: loaded (/etc/systemd/system/builder-app.service; enabled; preset: ignored)\n     Active: active (running) since Fri 2026-08-14 15:00:12 UTC; 1s ago\n Invocation: 4de56bc26cd34073aae92c848d0d52cf\n   Main PID: 815 (python)\n         IP: 0B in, 0B out\n         IO: 0B read, 32K written\n      Tasks: 1 (limit: 811)\n     Memory: 12.9M (peak: 13M)\n        CPU: 88ms\n     CGroup: /system.slice/builder-app.service\n             └─815 /nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py\n\nAug 14 15:00:12 builder-two systemd[1]: Started Agent-built application slot.\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "details": [
            {
              "data": "gAAAAABqfy2CXp-34bMgvuRpJfgC4JGaFMZT2y9AIrIIoAuP4dzt3SNZk4_ugjkF74A4u8qCY79lOn-KKUoHkRUMzl4J6UlUDZBlgJ8KadIf38X131AlKp_fc9ExvxXACc2GqN2ltPzajEto1lOk-sgCXQv2_CafKq8wtxvwxFiqSp_JWJiffCFmQvfR9qmJwbD8oYVZrB2rdlW7VKlQWXYCMLkREiIvji-IxrI7ArK1sF3uPIguA7PrKA-aDujQ9iGYckSxIZ_tQSy_dSHfIrZBq2hvWd8oGuvZSzUII0YFtFxxsfEwJxkWEn7FbU79AibSIKHmFCeptzQN5Gg9Xv_uPJeGU6cjF-OwPXU1v5DVaOf9-B2BPe5dc_3_8po-6viEyrfnXtXsMYoXUtMKDu04ZT5SNz2GaiMo7Ys3rr5hVucc8rtjMM282H-eCgWBKAS_YdtE5kgdmoBJbxVjDZo1846cT06NRwL_ltEAMbDgxjZETE9OVIl_BKm1GVw7_VdbIqb9IF3Suu1mBa_naU9NlPzPqgrPEL8b7xzldStKNYlpjrZsmTJdmX0prn_VWuFYcgtFH3-YNqMcuqdZfEZNhO1uQxWejCbJ9LYRDldkluY9H6GJE7JfgKwAnc5Y8hmsmQuYSzgEtQoa3lmiTOLP4aEkG5IYGDY6JpVbL1xNV9_PpReVlRDEi50wA8PUSimLSENwCK7VJ_hggpI_EDgqI_Hj5cN3S2Hw8gJKVu7LFTeshUzMcwzLfjnu48v2pfXH0fKkbOwzE4o6eHRtgtqDVXSN-MJp3KZWQmoZyh7GH9yyd3bb3J1IH2Z9lyN2MP5Tx_TKlAg8Id5ZPKr0hM4-5CTOJNIjXVVD6VOAVbHgJ1tLfrgjiaGky0zrUwgx5HMBCUoK_TdTLH38KFovPuIol8MagnCKafkJiSuWcdcgagOV4-ZboWCt2022wEh4iQobH2A9tSxkdEONlueAZceporR0eIV3gV0kGDmCEOhC-7_ZkpTLH0VXouy8HdIJ1lbMmx613DWMbxHqhDIC8jAM0VEai45jvkvUUZvT5rjKxQNgMbGjnkPdlmMjza_i9gZcl8FCiBGPIVhvlkJG2rp70pxQ0mfv5lh0XKQFQcEbMeIU3pY8nMaWZyHyylcOm39WJlrrFVBQEi5JgKasRSZI5fC_H-eBB2q6Ix_kY1CcGvygWNULRmW0bhq7lG4N5-8pNg3GrdG29DGxkTXesbEn-xymcP3yoeaSC3Ytg3rdrktC-49189084ndKL_Sd5kyazysXLtD5Ba7tuCrLzMh3OLrIJMmc4JP3M4UsM8N4XTkQ5lsC13wPEB7uHfT5z2bEkZBc32xYUQn3GTHMPwpvjeDS_2U3c8XVXlfbfl08ELeEymnxe3c0GhCYuM1PEsVitKRImo3HjmIipUpesoGC2hGw15sG0G0dwSrEzOCBTuzzH8DFSj9m64ggnMULExaeiO7Cv-Wey0tYPWL7RC0GEZXXzVcU14UjciuoEgKDgQZBcDJWg0W-ZrsQQhDo3q3d8uHnTS-dtsuo18XAIBgPWXnhkRLkG3cG8eHOG_US9JAl18G_7a0Qs4h2PxmELkdnRwec3bWRLODsE-xtGikpahJkR7PtNeAczdvaZO0F6I1uh40lW9JRFOeUFMROR87WkGoUBx3bgFAR2ay4veDOCByOdwWoDiB7Y3wGz2fleZwQzu9ZGFiTQqGwsJRO7_hUtF_I5o2xc8DEC-uoxF8O21y5P5Ha5dp5UefbOcGp0k2YYdqZpnG0z_0GixDcZRgoW6y4OHv_60huLH4uxCfP_ZcVSBbVD509_Jh-AAPVW_rFoHe8ZCZ8Gj3x3u_YnDW3whG_Povch0PAeicKyRAM2dZH0V2Jk7lhbCjYHKYrBUlEOnMEKSl7iElSpZXe4hJ5fMR0M8vBFyTSQmXW33S8U4GOMIbi9Vgfc0iFOi2HGFhYbf8xNtyFM6DiEEte07a1ubUvc3XDhzc5btNtkHM0sbfMjuZPcqYQQk8xAInaNtkjSc3uRaxySGlTSmnaAvIXjiiHf0hJu_2P5YOvyw27v86cFhtR3n7lfLgN_Umx_zFm9JdygVGI7uP5pIo7ngjhC4Fg17NwgjW_73cr6lr1QtypY6pywLjoA4ur5R1kbG_tnpoHAcPpGScnmRbLN-ymngcpwyLGk5XhYJdliB9LHnjcUrzxF5O9CHUGeCekNhzO37brM-oLIkCMwsHMjkwK498Z05boM2FZOBmexg05mwqWnVUbUNcOfFWq4Fj6NrxSmW5i0MGviXu1B1EzsNmSa-H3BuyYe6oFqoO3u1CqBKxpZcCeWg==.eyJlbmRwb2ludF9zbHVnIjoib3BlbmFpL2dwdC01LjYtbHVuYS0yMDI2MDcwOXxvcGVuYWkifQ",
              "format": "openai-responses-v1",
              "id": "rs_020b567ad488ff94016a7f2d7ff0008190a4183e99d84589e9",
              "index": 0,
              "type": "reasoning.encrypted"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "call_6mmFN0p2uElIk2qo7zzUFTbH",
          "name": "Bash",
          "input": {
            "command": "set -e\npython3 - <<'PY'\nimport http.client\n\ndef request(method, path, body=None):\n    conn = http.client.HTTPConnection('127.0.0.1', 8080, timeout=5)\n    headers = {} if body is None else {'Content-Length': str(len(body))}\n    conn.request(method, path, body=body, headers=headers)\n    response = conn.getresponse()\n    result = response.status, response.read()\n    conn.close()\n    return result\n\nassert request('GET', '/health') == (200, b'ready')\npayload = b'first\\x00payload\\xff\\n'\nassert request('PUT', '/records/durable-check', payload) == (204, b'')\nassert request('GET', '/records/durable-check') == (200, payload)\nupdated = b'updated body'\nassert request('PUT', '/records/durable-check', updated) == (204, b'')\nassert request('GET', '/records/durable-check') == (200, updated)\nassert request('GET', '/records/does-not-exist')[0] == 404\nprint('HTTP contract and overwrite checks passed')\nPY\nsystemctl restart builder-app.service\nsleep 1\npython3 - <<'PY'\nimport http.client\nconn = http.client.HTTPConnection('127.0.0.1', 8080, timeout=5)\nconn.request('GET', '/health')\nr = conn.getresponse()\nassert (r.status, r.read()) == (200, b'ready')\nconn.close()\nconn = http.client.HTTPConnection('127.0.0.1', 8080, timeout=5)\nconn.request('GET', '/records/durable-check')\nr = conn.getresponse()\nassert (r.status, r.read()) == (200, b'updated body')\nconn.close()\nprint('Persistence across service restart passed')\nPY\nsystemctl is-active builder-app.service\nls -l /var/lib/builder-app/records.sqlite3*",
            "description": "Exercise the HTTP contract and restart persistence",
            "timeout": 120000
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_6mmFN0p2uElIk2qo7zzUFTbH",
          "content": "HTTP contract and overwrite checks passed\nPersistence across service restart passed\nactive\n-rw-r--r-- 1 root root  4096 Aug 14 15:00 /var/lib/builder-app/records.sqlite3\n-rw-r--r-- 1 root root 32768 Aug 14 15:00 /var/lib/builder-app/records.sqlite3-shm\n-rw-r--r-- 1 root root 24752 Aug 14 15:00 /var/lib/builder-app/records.sqlite3-wal\n"
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "call_eKp30JN09ZZBsqoUEuK1OwH5",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Inspecting the host and deployment slot",
            "content": "Inspect the host and existing builder service unit",
            "status": "in_progress"
          },
          {
            "activeForm": "Implementing the HTTP record service",
            "content": "Implement the durable HTTP service at /opt/builder/app.py",
            "status": "pending"
          },
          {
            "activeForm": "Starting and verifying deployment",
            "content": "Start the existing unit and verify persistence and reboot durability",
            "status": "pending"
          }
        ]
      },
      "output": "Added:\n  + Inspect the host and existing builder service unit\n  + Implement the durable HTTP service at /opt/builder/app.py\n  + Start the existing unit and verify persistence and reboot durability\n\nCurrent tasks:\n  ◉ Inspect the host and existing builder service unit\n  ○ Implement the durable HTTP service at /opt/builder/app.py\n  ○ Start the existing unit and verify persistence and reboot durability\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 3883,
      "duration_ms": 0
    },
    {
      "id": "call_qBq5vWYfuXtCxBLDHyMKSG0i",
      "name": "Bash",
      "input": {
        "command": "pwd; printf '\\n-- root --\\n'; ls -la /; printf '\\n-- opt --\\n'; ls -la /opt 2>&1; printf '\\n-- builder --\\n'; ls -la /opt/builder 2>&1",
        "description": "Inspect filesystem and builder directory",
        "timeout": 120000
      },
      "output": "/root\n\n-- root --\ntotal 64\ndrwxr-xr-x  17 root root  4096 Aug 14 14:59 .\ndrwxr-xr-x  17 root root  4096 Aug 14 14:59 ..\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 bin\ndrwxr-xr-x  17 root root  3260 Aug 14 14:59 dev\ndrwxr-xr-x  21 root root  4096 Aug 14 14:59 etc\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 home\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 lib64\ndrwx------   2 root root 16384 Aug 14 14:59 lost+found\ndrwxr-xr-x   6 root root  4096 Aug 14 14:59 nix\ndr-xr-xr-x 102 root root     0 Aug 14 14:59 proc\ndrwx------   5 root root  4096 Aug 14 14:59 root\ndrwxr-xr-x  19 root root   500 Aug 14 14:59 run\ndrwxr-xr-x   2 root root  4096 Aug 14 14:59 srv\ndr-xr-xr-x  13 root root     0 Aug 14 14:59 sys\ndrwxrwxrwt  11 root root  4096 Aug 14 14:59 tmp\ndrwxr-xr-x   3 root root  4096 Aug 14 14:59 usr\ndrwxr-xr-x   9 root root  4096 Aug 14 14:59 var\n\n-- opt --\nls: cannot access '/opt': No such file or directory\n\n-- builder --\nls: cannot access '/opt/builder': No such file or directory\n\nExit code: exit status: 2",
      "is_error": true,
      "read_only": false,
      "started_after_ms": 9908,
      "duration_ms": 33
    },
    {
      "id": "call_FPtxeoaSprdupqIRqRSSI4W3",
      "name": "Bash",
      "input": {
        "command": "systemctl cat builder-app.service 2>&1; printf '\\n-- status --\\n'; systemctl status builder-app.service --no-pager 2>&1",
        "description": "Inspect existing service unit",
        "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 Fri 2026-08-14 14:59:37 UTC; 9s ago\n   Duration: 140ms\n Invocation: f81e620f0ff74127bd207060d1d002d8\n    Process: 627 ExecStart=/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py (code=exited, status=2)\n   Main PID: 627 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.2M\n        CPU: 71ms\n\nAug 14 14:59:37 builder-two systemd[1]: builder-app.service: Scheduled restart job, restart counter is at 5.\nAug 14 14:59:37 builder-two systemd[1]: builder-app.service: Start request repeated too quickly.\nAug 14 14:59:37 builder-two systemd[1]: builder-app.service: Failed with result 'start-limit-hit'.\nAug 14 14:59:37 builder-two systemd[1]: Failed to start Agent-built application slot.\n\nExit code: exit status: 3",
      "is_error": true,
      "read_only": false,
      "started_after_ms": 9942,
      "duration_ms": 40
    },
    {
      "id": "call_kJd8Imzv704stCMbHb1Yv5tx",
      "name": "Bash",
      "input": {
        "command": "id; printf '\\n-- python --\\n'; command -v python3; python3 --version; printf '\\n-- port --\\n'; ss -ltnp 2>&1 | head -40",
        "description": "Inspect runtime and port availability",
        "timeout": 120000
      },
      "output": "uid=0(root) gid=0(root) groups=0(root)\n\n-- python --\n/run/current-system/sw/bin/python3\nPython 3.14.6\n\n-- port --\nState  Recv-Q Send-Q Local Address:Port  Peer Address:PortProcess\nLISTEN 0      4096         0.0.0.0:5355       0.0.0.0:*    users:((\"systemd-resolve\",pid=297,fd=14))\nLISTEN 0      128        127.0.0.1:18002      0.0.0.0:*    users:((\"sshd-session\",pid=624,fd=10))\nLISTEN 0      4096   127.0.0.53%lo:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=297,fd=23))\nLISTEN 0      128          0.0.0.0:22         0.0.0.0:*    users:((\"sshd\",pid=582,fd=6))\nLISTEN 0      4096      127.0.0.54:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=297,fd=25))\nLISTEN 0      4096            [::]:5355          [::]:*    users:((\"systemd-resolve\",pid=297,fd=16))\nLISTEN 0      128             [::]:22            [::]:*    users:((\"sshd\",pid=582,fd=7))\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 9983,
      "duration_ms": 61
    },
    {
      "id": "call_JgEpaPE0fql0itM5IaheB14E",
      "name": "Write",
      "input": {
        "content": "#!/usr/bin/env python3\n\"\"\"Small durable HTTP record service for the builder deployment slot.\"\"\"\n\nimport os\nimport sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nfrom urllib.parse import unquote, urlsplit\n\n\nHOST = \"0.0.0.0\"\nPORT = 8080\nDATA_DIR = \"/var/lib/builder-app\"\nDATABASE = os.path.join(DATA_DIR, \"records.sqlite3\")\n\n\nclass RecordHandler(BaseHTTPRequestHandler):\n    protocol_version = \"HTTP/1.1\"\n\n    def _send(self, status, body=b\"\", content_type=None):\n        self.send_response(status)\n        if content_type is not None:\n            self.send_header(\"Content-Type\", content_type)\n        self.send_header(\"Content-Length\", str(len(body)))\n        self.end_headers()\n        if body:\n            self.wfile.write(body)\n\n    def _record_id(self):\n        path = urlsplit(self.path).path\n        parts = path.split(\"/\")\n        if len(parts) != 3 or parts[1] != \"records\" or not parts[2]:\n            return None\n        try:\n            return unquote(parts[2], errors=\"strict\")\n        except UnicodeDecodeError:\n            return None\n\n    def _read_body(self):\n        value = self.headers.get(\"Content-Length\")\n        if value is None:\n            return None\n        try:\n            length = int(value)\n        except ValueError:\n            return None\n        if length < 0:\n            return None\n        return self.rfile.read(length)\n\n    def do_GET(self):\n        if urlsplit(self.path).path == \"/health\":\n            self._send(200, b\"ready\", \"text/plain\")\n            return\n\n        record_id = self._record_id()\n        if record_id is None:\n            self._send(404)\n            return\n\n        with sqlite3.connect(DATABASE) as connection:\n            row = connection.execute(\n                \"SELECT body FROM records WHERE id = ?\", (record_id,)\n            ).fetchone()\n        if row is None:\n            self._send(404)\n        else:\n            self._send(200, bytes(row[0]), \"application/octet-stream\")\n\n    def do_PUT(self):\n        record_id = self._record_id()\n        if record_id is None:\n            self._send(404)\n            return\n\n        body = self._read_body()\n        if body is None:\n            self._send(400)\n            return\n\n        with sqlite3.connect(DATABASE) as connection:\n            connection.execute(\n                \"INSERT INTO records (id, body) VALUES (?, ?) \"\n                \"ON CONFLICT(id) DO UPDATE SET body = excluded.body\",\n                (record_id, body),\n            )\n        self._send(204)\n\n    def log_message(self, format, *args):\n        print(\"%s - - [%s] %s\" % (self.address_string(), self.log_date_time_string(), format % args), flush=True)\n\n\ndef main():\n    os.makedirs(DATA_DIR, exist_ok=True)\n    with sqlite3.connect(DATABASE) as connection:\n        connection.execute(\"PRAGMA journal_mode = WAL\")\n        connection.execute(\"PRAGMA synchronous = FULL\")\n        connection.execute(\n            \"CREATE TABLE IF NOT EXISTS records \"\n            \"(id TEXT PRIMARY KEY NOT NULL, body BLOB NOT NULL)\"\n        )\n\n    server = ThreadingHTTPServer((HOST, PORT), RecordHandler)\n    server.serve_forever()\n\n\nif __name__ == \"__main__\":\n    main()\n",
        "file_path": "/opt/builder/app.py"
      },
      "output": "Successfully wrote to /opt/builder/app.py",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 26209,
      "duration_ms": 0
    },
    {
      "id": "call_clWYGoS1Z91jrCngXqxAHEtp",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Inspecting the host and deployment slot",
            "content": "Inspect the host and existing builder service unit",
            "status": "completed"
          },
          {
            "activeForm": "Implementing the HTTP record service",
            "content": "Implement the durable HTTP service at /opt/builder/app.py",
            "status": "completed"
          },
          {
            "activeForm": "Starting and verifying deployment",
            "content": "Start the existing unit and verify persistence and reboot durability",
            "status": "in_progress"
          }
        ]
      },
      "output": "Started:\n  > Starting and verifying deployment\nCompleted:\n  ✓ Inspect the host and existing builder service unit\n  ✓ Implement the durable HTTP service at /opt/builder/app.py\n\nCurrent tasks:\n  ✓ Inspect the host and existing builder service unit\n  ✓ Implement the durable HTTP service at /opt/builder/app.py\n  ◉ Start the existing unit and verify persistence and reboot durability\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 30228,
      "duration_ms": 0
    },
    {
      "id": "call_CpHsrCP3miE5dOYVwb43OoZ6",
      "name": "Bash",
      "input": {
        "command": "set -e\n/nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python -m py_compile /opt/builder/app.py\nsystemctl reset-failed builder-app.service\nsystemctl start builder-app.service\nsleep 1\nsystemctl is-active builder-app.service\nsystemctl is-enabled builder-app.service\nsystemctl status builder-app.service --no-pager",
        "description": "Validate the app and start the builder service",
        "timeout": 120000
      },
      "output": "active\nenabled\n● builder-app.service - Agent-built application slot\n     Loaded: loaded (/etc/systemd/system/builder-app.service; enabled; preset: ignored)\n     Active: active (running) since Fri 2026-08-14 15:00:12 UTC; 1s ago\n Invocation: 4de56bc26cd34073aae92c848d0d52cf\n   Main PID: 815 (python)\n         IP: 0B in, 0B out\n         IO: 0B read, 32K written\n      Tasks: 1 (limit: 811)\n     Memory: 12.9M (peak: 13M)\n        CPU: 88ms\n     CGroup: /system.slice/builder-app.service\n             └─815 /nix/store/gxzhl7aaiid7zp3y47jqqiq7zg5mqpwp-python3-3.14.6/bin/python /opt/builder/app.py\n\nAug 14 15:00:12 builder-two systemd[1]: Started Agent-built application slot.\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 34724,
      "duration_ms": 1335
    },
    {
      "id": "call_6mmFN0p2uElIk2qo7zzUFTbH",
      "name": "Bash",
      "input": {
        "command": "set -e\npython3 - <<'PY'\nimport http.client\n\ndef request(method, path, body=None):\n    conn = http.client.HTTPConnection('127.0.0.1', 8080, timeout=5)\n    headers = {} if body is None else {'Content-Length': str(len(body))}\n    conn.request(method, path, body=body, headers=headers)\n    response = conn.getresponse()\n    result = response.status, response.read()\n    conn.close()\n    return result\n\nassert request('GET', '/health') == (200, b'ready')\npayload = b'first\\x00payload\\xff\\n'\nassert request('PUT', '/records/durable-check', payload) == (204, b'')\nassert request('GET', '/records/durable-check') == (200, payload)\nupdated = b'updated body'\nassert request('PUT', '/records/durable-check', updated) == (204, b'')\nassert request('GET', '/records/durable-check') == (200, updated)\nassert request('GET', '/records/does-not-exist')[0] == 404\nprint('HTTP contract and overwrite checks passed')\nPY\nsystemctl restart builder-app.service\nsleep 1\npython3 - <<'PY'\nimport http.client\nconn = http.client.HTTPConnection('127.0.0.1', 8080, timeout=5)\nconn.request('GET', '/health')\nr = conn.getresponse()\nassert (r.status, r.read()) == (200, b'ready')\nconn.close()\nconn = http.client.HTTPConnection('127.0.0.1', 8080, timeout=5)\nconn.request('GET', '/records/durable-check')\nr = conn.getresponse()\nassert (r.status, r.read()) == (200, b'updated body')\nconn.close()\nprint('Persistence across service restart passed')\nPY\nsystemctl is-active builder-app.service\nls -l /var/lib/builder-app/records.sqlite3*",
        "description": "Exercise the HTTP contract and restart persistence",
        "timeout": 120000
      },
      "output": "HTTP contract and overwrite checks passed\nPersistence across service restart passed\nactive\n-rw-r--r-- 1 root root  4096 Aug 14 15:00 /var/lib/builder-app/records.sqlite3\n-rw-r--r-- 1 root root 32768 Aug 14 15:00 /var/lib/builder-app/records.sqlite3-shm\n-rw-r--r-- 1 root root 24752 Aug 14 15:00 /var/lib/builder-app/records.sqlite3-wal\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 42962,
      "duration_ms": 1395
    }
  ],
  "timing": {
    "total_duration_ms": 44357,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 3882,
        "status": "completed",
        "usage": {
          "input_tokens": 2144,
          "output_tokens": 166,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 2141,
          "cost_usd": 0.000367525
        }
      },
      {
        "index": 2,
        "started_after_ms": 3883,
        "duration_ms": 6024,
        "status": "completed",
        "usage": {
          "input_tokens": 2406,
          "output_tokens": 230,
          "cache_read_tokens": 2141,
          "cache_creation_tokens": 262,
          "cost_usd": 0.00019246
        }
      },
      {
        "index": 3,
        "started_after_ms": 10045,
        "duration_ms": 16161,
        "status": "completed",
        "usage": {
          "input_tokens": 4367,
          "output_tokens": 1797,
          "cache_read_tokens": 2403,
          "cache_creation_tokens": 1961,
          "cost_usd": 0.001347655
        }
      },
      {
        "index": 4,
        "started_after_ms": 26212,
        "duration_ms": 4015,
        "status": "completed",
        "usage": {
          "input_tokens": 6183,
          "output_tokens": 122,
          "cache_read_tokens": 4364,
          "cache_creation_tokens": 1816,
          "cost_usd": 0.00034414
        }
      },
      {
        "index": 5,
        "started_after_ms": 30229,
        "duration_ms": 4489,
        "status": "completed",
        "usage": {
          "input_tokens": 6397,
          "output_tokens": 208,
          "cache_read_tokens": 6180,
          "cache_creation_tokens": 214,
          "cost_usd": 0.00021365
        }
      },
      {
        "index": 6,
        "started_after_ms": 36060,
        "duration_ms": 6897,
        "status": "completed",
        "usage": {
          "input_tokens": 6849,
          "output_tokens": 648,
          "cache_read_tokens": 6394,
          "cache_creation_tokens": 452,
          "cost_usd": 0.00050954
        }
      }
    ]
  }
}