{
  "schema_version": 2,
  "model": "deepseek/deepseek-v4-flash-0731",
  "outcome": {
    "status": "running"
  },
  "usage": {
    "input_tokens": 7824,
    "output_tokens": 636,
    "cache_read_tokens": 3072,
    "cache_creation_tokens": 0,
    "cost_usd": 0.000529573604
  },
  "messages": [
    {
      "role": "user",
      "content": "Build the durable job queue in the contract appended below on this blank host. Recover accepted work exactly once. 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 job queue contract\n\nDeploy two existing systemd slots: `queue-api.service` runs\n`/opt/job-queue/api.py`, and `queue-worker.service` runs\n`/opt/job-queue/worker.py`. Both use the existing SQLite database at\n`/var/lib/job-queue/jobs.sqlite3`.\n\nThe API listens on port 8080. `GET /health` returns `200` and the exact body\n`ready`. `POST /jobs/<id>` accepts a UTF-8 request body and returns `202`.\n`GET /jobs/<id>` returns JSON containing `id`, `payload`, `status`, `result`,\nand integer `attempts`. The worker completes each queued job with\n`result = \"processed:\" + payload` and exactly one attempt.\n\nJobs accepted before deployment already exist in the database. They must be\ncompleted, not discarded or replaced. Existing and newly accepted jobs must\nsurvive worker restart and host reboot. Both services must return without agent\nhelp after reboot."
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Let me start by exploring the host to understand what's already there. The contract says there are existing systemd slots, an API script, a worker script, and an SQLite database. Let me look around.",
          "details": [
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            },
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              "format": "unknown",
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              "text": " exploring",
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            {
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              "text": " the",
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              "format": "unknown",
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              "text": " host",
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              "text": " an",
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              "format": "unknown",
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              "text": " API",
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            {
              "format": "unknown",
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            {
              "format": "unknown",
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              "format": "unknown",
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              "text": " a",
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          ]
        },
        {
          "type": "tool_use",
          "id": "call_f0be18fb5a0e4987a48e5138",
          "name": "Bash",
          "input": {
            "command": "ls -la /opt/job-queue/ 2>&1; echo \"---\"; ls -la /var/lib/job-queue/ 2>&1; echo \"---\"; systemctl list-units --all 2>/dev/null | grep -i queue; echo \"---\"; cat /etc/systemd/system/queue-api.service 2>&1; echo \"---\"; cat /etc/systemd/system/queue-worker.service 2>&1",
            "description": "Inspect existing deployment files"
          }
        },
        {
          "type": "tool_use",
          "id": "call_cc16dd6916ab4287a3f27805",
          "name": "Bash",
          "input": {
            "command": "cat /opt/job-queue/api.py 2>&1; echo \"---WORKER---\"; cat /opt/job-queue/worker.py 2>&1",
            "description": "Read API and worker scripts"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_f0be18fb5a0e4987a48e5138",
          "content": "ls: cannot access '/opt/job-queue/': No such file or directory\n---\ntotal 20\ndrwxr-xr-x 2 root root  4096 Aug 15 03:28 .\ndrwxr-xr-x 9 root root  4096 Aug 15 03:28 ..\n-rw-r--r-- 1 root root 12288 Aug 15 03:28 jobs.sqlite3\n---\n  dev-mqueue.mount                                                                    loaded    active   mounted   POSIX Message Queue File System\n● queue-api.service                                                                   loaded    failed   failed    Agent-built durable queue API slot\n  queue-seed.service                                                                  loaded    active   exited    Seed opaque jobs accepted before the deployment\n● queue-worker.service                                                                loaded    failed   failed    Agent-built durable queue worker slot\n---\n[Unit]\nAfter=network.target queue-seed.service\nDescription=Agent-built durable queue API slot\nRequires=queue-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/job-queue/api.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n---\n[Unit]\nAfter=queue-seed.service\nDescription=Agent-built durable queue worker slot\nRequires=queue-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/job-queue/worker.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_cc16dd6916ab4287a3f27805",
          "content": "cat: /opt/job-queue/api.py: No such file or directory\n---WORKER---\ncat: /opt/job-queue/worker.py: No such file or directory\n\nExit code: exit status: 1",
          "is_error": true
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "So the situation is:\n1. The database exists at `/var/lib/job-queue/jobs.sqlite3`\n2. The systemd service units exist (queue-api.service and queue-worker.service) but they failed because `/opt/job-queue/api.py` and `/opt/job-queue/worker.py` don't exist\n3. There's also a `queue-seed.service` that already ran successfully - this was \"Seed opaque jobs accepted before the deployment\"\n\nLet me check the database structure and the seed service.",
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            },
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              "text": " accepted before",
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            },
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              "format": "unknown",
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              "text": " the deployment",
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            },
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              "text": "\"\n\nLet",
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              "text": " me check",
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            },
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              "format": "unknown",
              "index": 0,
              "text": " the database",
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            },
            {
              "format": "unknown",
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              "text": " structure",
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            },
            {
              "format": "unknown",
              "index": 0,
              "text": " and the",
              "type": "reasoning.text"
            },
            {
              "format": "unknown",
              "index": 0,
              "text": " seed service",
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            },
            {
              "format": "unknown",
              "index": 0,
              "text": ".",
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            }
          ]
        },
        {
          "type": "tool_use",
          "id": "call_9cf03d35b92d4e9eb2dc87eb",
          "name": "Bash",
          "input": {
            "command": "sqlite3 /var/lib/job-queue/jobs.sqlite3 \".schema\" 2>&1",
            "description": "Check database schema"
          }
        },
        {
          "type": "tool_use",
          "id": "call_fdb30ed4a37348db82cdc3f4",
          "name": "Bash",
          "input": {
            "command": "sqlite3 /var/lib/job-queue/jobs.sqlite3 \"SELECT * FROM jobs;\" 2>&1",
            "description": "Check existing job data"
          }
        },
        {
          "type": "tool_use",
          "id": "call_5f4f7355b66646c99c92577e",
          "name": "Bash",
          "input": {
            "command": "cat /etc/systemd/system/queue-seed.service 2>&1; echo \"---JOURNAL---\"; journalctl -u queue-seed.service --no-pager 2>&1",
            "description": "Check seed service"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_9cf03d35b92d4e9eb2dc87eb",
          "content": "CREATE TABLE jobs (id TEXT PRIMARY KEY, payload TEXT NOT NULL, status TEXT NOT NULL, result TEXT, attempts INTEGER NOT NULL DEFAULT 0);\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_fdb30ed4a37348db82cdc3f4",
          "content": "accepted-alpha-7d3|alpha|queued||0\naccepted-beta-91e|beta|queued||0\naccepted-gamma-c42|gamma|queued||0\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_5f4f7355b66646c99c92577e",
          "content": "[Unit]\nBefore=queue-api.service queue-worker.service\nDescription=Seed opaque jobs accepted before the deployment\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/2dfn4ylvf2r7j47aqms6mn63pnk0nj5h-unit-script-queue-seed-start/bin/queue-seed-start \nRemainAfterExit=true\nType=oneshot\n\n[Install]\nWantedBy=multi-user.target\n---JOURNAL---\nAug 15 03:28:42 queue-three systemd[1]: Starting Seed opaque jobs accepted before the deployment...\nAug 15 03:28:42 queue-three systemd[1]: Finished Seed opaque jobs accepted before the deployment.\n"
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "call_f0be18fb5a0e4987a48e5138",
      "name": "Bash",
      "input": {
        "command": "ls -la /opt/job-queue/ 2>&1; echo \"---\"; ls -la /var/lib/job-queue/ 2>&1; echo \"---\"; systemctl list-units --all 2>/dev/null | grep -i queue; echo \"---\"; cat /etc/systemd/system/queue-api.service 2>&1; echo \"---\"; cat /etc/systemd/system/queue-worker.service 2>&1",
        "description": "Inspect existing deployment files"
      },
      "output": "ls: cannot access '/opt/job-queue/': No such file or directory\n---\ntotal 20\ndrwxr-xr-x 2 root root  4096 Aug 15 03:28 .\ndrwxr-xr-x 9 root root  4096 Aug 15 03:28 ..\n-rw-r--r-- 1 root root 12288 Aug 15 03:28 jobs.sqlite3\n---\n  dev-mqueue.mount                                                                    loaded    active   mounted   POSIX Message Queue File System\n● queue-api.service                                                                   loaded    failed   failed    Agent-built durable queue API slot\n  queue-seed.service                                                                  loaded    active   exited    Seed opaque jobs accepted before the deployment\n● queue-worker.service                                                                loaded    failed   failed    Agent-built durable queue worker slot\n---\n[Unit]\nAfter=network.target queue-seed.service\nDescription=Agent-built durable queue API slot\nRequires=queue-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/job-queue/api.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n---\n[Unit]\nAfter=queue-seed.service\nDescription=Agent-built durable queue worker slot\nRequires=queue-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/job-queue/worker.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 7104,
      "duration_ms": 83
    },
    {
      "id": "call_cc16dd6916ab4287a3f27805",
      "name": "Bash",
      "input": {
        "command": "cat /opt/job-queue/api.py 2>&1; echo \"---WORKER---\"; cat /opt/job-queue/worker.py 2>&1",
        "description": "Read API and worker scripts"
      },
      "output": "cat: /opt/job-queue/api.py: No such file or directory\n---WORKER---\ncat: /opt/job-queue/worker.py: No such file or directory\n\nExit code: exit status: 1",
      "is_error": true,
      "read_only": false,
      "started_after_ms": 7188,
      "duration_ms": 54
    },
    {
      "id": "call_9cf03d35b92d4e9eb2dc87eb",
      "name": "Bash",
      "input": {
        "command": "sqlite3 /var/lib/job-queue/jobs.sqlite3 \".schema\" 2>&1",
        "description": "Check database schema"
      },
      "output": "CREATE TABLE jobs (id TEXT PRIMARY KEY, payload TEXT NOT NULL, status TEXT NOT NULL, result TEXT, attempts INTEGER NOT NULL DEFAULT 0);\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 25523,
      "duration_ms": 23
    },
    {
      "id": "call_fdb30ed4a37348db82cdc3f4",
      "name": "Bash",
      "input": {
        "command": "sqlite3 /var/lib/job-queue/jobs.sqlite3 \"SELECT * FROM jobs;\" 2>&1",
        "description": "Check existing job data"
      },
      "output": "accepted-alpha-7d3|alpha|queued||0\naccepted-beta-91e|beta|queued||0\naccepted-gamma-c42|gamma|queued||0\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 25546,
      "duration_ms": 14
    },
    {
      "id": "call_5f4f7355b66646c99c92577e",
      "name": "Bash",
      "input": {
        "command": "cat /etc/systemd/system/queue-seed.service 2>&1; echo \"---JOURNAL---\"; journalctl -u queue-seed.service --no-pager 2>&1",
        "description": "Check seed service"
      },
      "output": "[Unit]\nBefore=queue-api.service queue-worker.service\nDescription=Seed opaque jobs accepted before the deployment\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/2dfn4ylvf2r7j47aqms6mn63pnk0nj5h-unit-script-queue-seed-start/bin/queue-seed-start \nRemainAfterExit=true\nType=oneshot\n\n[Install]\nWantedBy=multi-user.target\n---JOURNAL---\nAug 15 03:28:42 queue-three systemd[1]: Starting Seed opaque jobs accepted before the deployment...\nAug 15 03:28:42 queue-three systemd[1]: Finished Seed opaque jobs accepted before the deployment.\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 25560,
      "duration_ms": 24
    }
  ],
  "timing": {
    "total_duration_ms": 25585,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 7104,
        "status": "completed",
        "usage": {
          "input_tokens": 3107,
          "output_tokens": 285,
          "cache_read_tokens": 3072,
          "cache_creation_tokens": 0,
          "cost_usd": 0.000097137404
        }
      },
      {
        "index": 2,
        "started_after_ms": 7243,
        "duration_ms": 18280,
        "status": "completed",
        "usage": {
          "input_tokens": 4717,
          "output_tokens": 351,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0004324362
        }
      }
    ]
  }
}