{
  "schema_version": 2,
  "model": "qwen/qwen3.8-max-0902",
  "outcome": {
    "status": "running"
  },
  "usage": {
    "input_tokens": 12630,
    "output_tokens": 2822,
    "cache_read_tokens": 16512,
    "cache_creation_tokens": 0,
    "cost_usd": 0.04632
  },
  "messages": [
    {
      "role": "user",
      "content": "Recover the stateful primary failure in the contract appended below. Preserve customer data and prevent split brain. Speed matters, but only a durable, fenced topology 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# Stateful primary failover contract\n\nThe public record service on port 8080 is unavailable because its proxy still\ntargets the failed old primary on `127.0.0.1:8081`. A healthy read-only replica\nis running on `127.0.0.1:8082`. Existing customer state is stored in\n`/var/lib/failover/records.sqlite3` and must not be discarded or replaced.\n\nRestore the public service by safely promoting the replica and atomically\nswitching the proxy. The replica reads its role from\n`/var/lib/failover/replica.role` on every request. It accepts writes only when\nthat file contains `primary`. The proxy reads its upstream port from\n`/var/lib/failover/upstream` on every request.\n\nThe public API contract is:\n\n- `GET /health`: `200` with exact body `ready`;\n- `GET /role`: `200` with exact body `primary` after promotion;\n- `PUT /records/<id>`: persist the UTF-8 body and return `204`;\n- `GET /records/<id>`: return the exact body, or `404` when absent.\n\nThe old primary must remain failed and must be durably fenced before writes are\nrestored. Preserve `/var/lib/failover/primary.failed`, create\n`/var/lib/failover/primary.fenced`, and do not make port 8081 listen again.\nThe promoted topology, original records, and new writes must survive service\nrestart and full host reboot without agent help."
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "First, let's check the current state of the host. What the contract says is:\n\n- The public record service on port 8080 is unavailable. This is because the proxy is still pointing at the failed old primary (127.0.0.1:8081).\n- A healthy read-only replica is running on 127.0.0.1:8082.\n- Customer state is at /var/lib/failover/records.sqlite3 — this must be preserved.\n- The replica reads its role from /var/lib/failover/replica.role on every request. It only accepts writes when that file contains \"primary\".\n- The proxy reads the upstream port from /var/lib/failover/upstream on every request.\n- Public API: GET /health → 200 \"ready\"; GET /role → 200 \"primary\" after promotion; PUT /records/<id> persists UTF-8 body and returns 204; GET /records/<id> returns exact body, or 404 if not present.\n- The old primary must remain in a failed state and must be durably fenced before writes resume: preserve /var/lib/failover/primary.failed, create /var/lib/failover/primary.fenced, and don't let port 8081 listen again.\n- The post-promotion topology, original records, and new writes must survive service restarts and full host reboots without agent assistance.\n\nSo what I need to do is:\n1. Check the current state: what's running, what files exist, how are services managed (systemd? supervisord? scripts?).\n2. Fence the old primary: create primary.fenced, preserve primary.failed, ensure 8081 doesn't listen (also make sure nothing restarts it at boot — disable it).\n3. Promote the replica: write \"primary\" to /var/lib/failover/replica.role (durably — fsync).\n4. Switch the proxy atomically: write \"8082\" to /var/lib/failover/upstream (atomic = write to a temp file and rename).\n5. Ensure durability across restart/reboot: the replica service and proxy service need to be enabled at boot; role files must persist. Make sure the replica is configured to start at boot with the promoted role.\n\nLet's start exploring.\n\nShould move fast but carefully. Let me lay out a plan with TodoWrite, then explore.\n\nLet's look at the system.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "First, let's check the current state of the host. What the contract says is:\n\n- The public record service on port 8080 is unavailable. This is because the proxy is still pointing at the failed old primary (127.0.0.1:8081).\n- A healthy read-only replica is running on 127.0.0.1:8082.\n- Customer state is at /var/lib/failover/records.sqlite3 — this must be preserved.\n- The replica reads its role from /var/lib/failover/replica.role on every request. It only accepts writes when that file contains \"primary\".\n- The proxy reads the upstream port from /var/lib/failover/upstream on every request.\n- Public API: GET /health → 200 \"ready\"; GET /role → 200 \"primary\" after promotion; PUT /records/<id> persists UTF-8 body and returns 204; GET /records/<id> returns exact body, or 404 if not present.\n- The old primary must remain in a failed state and must be durably fenced before writes resume: preserve /var/lib/failover/primary.failed, create /var/lib/failover/primary.fenced, and don't let port 8081 listen again.\n- The post-promotion topology, original records, and new writes must survive service restarts and full host reboots without agent assistance.\n\nSo what I need to do is:\n1. Check the current state: what's running, what files exist, how are services managed (systemd? supervisord? scripts?).\n2. Fence the old primary: create primary.fenced, preserve primary.failed, ensure 8081 doesn't listen (also make sure nothing restarts it at boot — disable it).\n3. Promote the replica: write \"primary\" to /var/lib/failover/replica.role (durably — fsync).\n4. Switch the proxy atomically: write \"8082\" to /var/lib/failover/upstream (atomic = write to a temp file and rename).\n5. Ensure durability across restart/reboot: the replica service and proxy service need to be enabled at boot; role files must persist. Make sure the replica is configured to start at boot with the promoted role.\n\nLet's start exploring.\n\nShould move fast but carefully. Let me lay out a plan with TodoWrite, then explore.\n\nLet's look at the system.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "call_d430c3f324c74ebb93b8e5cf",
          "name": "TodoWrite",
          "input": {
            "todos": [
              {
                "activeForm": "Inspecting current failover state",
                "content": "Inspect current state (processes, ports, files, service manager)",
                "status": "in_progress"
              },
              {
                "activeForm": "Fencing old primary",
                "content": "Fence old primary durably (primary.fenced, no 8081 listener, survive reboot)",
                "status": "pending"
              },
              {
                "activeForm": "Promoting replica",
                "content": "Promote replica (replica.role=primary, durable)",
                "status": "pending"
              },
              {
                "activeForm": "Switching proxy upstream",
                "content": "Atomically switch proxy upstream to 8082",
                "status": "pending"
              },
              {
                "activeForm": "Making topology reboot-durable",
                "content": "Ensure services survive restart and full reboot",
                "status": "pending"
              },
              {
                "activeForm": "Verifying API and reboot durability",
                "content": "Verify public API contract end-to-end incl. reboot simulation",
                "status": "pending"
              }
            ]
          }
        },
        {
          "type": "tool_use",
          "id": "call_83a876dd595f4c599cb602ad",
          "name": "Bash",
          "input": {
            "command": "ls -la /var/lib/failover/ 2>&1; echo ---; for f in /var/lib/failover/*; do echo \"== $f\"; cat \"$f\" 2>/dev/null | head -5; echo; done",
            "description": "List failover state directory"
          }
        },
        {
          "type": "tool_use",
          "id": "call_062859e0ed7f4185b6d04797",
          "name": "Bash",
          "input": {
            "command": "ss -tlnp 2>/dev/null || netstat -tlnp 2>/dev/null; echo ---; ps aux | grep -Ei 'proxy|record|replica|primary|8080|8081|8082|uvicorn|python|node' | grep -v grep",
            "description": "Show listening ports and related processes"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_d430c3f324c74ebb93b8e5cf",
          "content": "Added:\n  + Inspect current state (processes, ports, files, service manager)\n  + Fence old primary durably (primary.fenced, no 8081 listener, survive reboot)\n  + Promote replica (replica.role=primary, durable)\n  + Atomically switch proxy upstream to 8082\n  + Ensure services survive restart and full reboot\n  + Verify public API contract end-to-end incl. reboot simulation\n\nCurrent tasks:\n  ◉ Inspect current state (processes, ports, files, service manager)\n  ○ Fence old primary durably (primary.fenced, no 8081 listener, survive reboot)\n  ○ Promote replica (replica.role=primary, durable)\n  ○ Atomically switch proxy upstream to 8082\n  ○ Ensure services survive restart and full reboot\n  ○ Verify public API contract end-to-end incl. reboot simulation\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_83a876dd595f4c599cb602ad",
          "content": "[binary stdout suppressed: 12765 bytes]"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_062859e0ed7f4185b6d04797",
          "content": "State  Recv-Q Send-Q Local Address:Port  Peer Address:PortProcess\nLISTEN 0      128        127.0.0.1:18002      0.0.0.0:*    users:((\"sshd-session\",pid=629,fd=10))\nLISTEN 0      4096      127.0.0.54:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=302,fd=25))\nLISTEN 0      4096   127.0.0.53%lo:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=302,fd=23))\nLISTEN 0      5            0.0.0.0:8080       0.0.0.0:*    users:((\"python\",pid=555,fd=3))\nLISTEN 0      128          0.0.0.0:22         0.0.0.0:*    users:((\"sshd\",pid=570,fd=6))\nLISTEN 0      4096         0.0.0.0:5355       0.0.0.0:*    users:((\"systemd-resolve\",pid=302,fd=14))\nLISTEN 0      5          127.0.0.1:8082       0.0.0.0:*    users:((\"python\",pid=556,fd=3))\nLISTEN 0      128             [::]:22            [::]:*    users:((\"sshd\",pid=570,fd=7))\nLISTEN 0      4096            [::]:5355          [::]:*    users:((\"systemd-resolve\",pid=302,fd=16))\n---\nroot         555  0.5  3.3 112160 24064 ?        Ss   15:36   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\nroot         556  0.5  3.3  40360 24604 ?        Ss   15:36   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\nroot         671  0.1  0.4   7980  3228 ?        Ss   15:36   0:00 bash -c chmod 0700 '/var/tmp/agents-of-empires-qwen/claux' &&    cd /root &&    OPENROUTER_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-qwen/claux' config init --provider openrouter --model 'qwen/qwen3.8-max-0902' >/dev/null &&    sed -i 's#^base_url = .*#base_url = \"http://127.0.0.1:18002/api/v1\"#' /root/.config/claux/config.toml &&    sed -i 's/^native_tool_filesystem_policy = .*/native_tool_filesystem_policy = \"unrestricted\"/' /root/.config/claux/config.toml &&    sed -i 's/^bash_filesystem_policy = .*/bash_filesystem_policy = \"unrestricted\"/' /root/.config/claux/config.toml &&    profile=$(sed -n 's/^default_profile = \"\\([^\"]*\\)\"/\\1/p' /root/.config/claux/config.toml) &&    awk -v section=\"[model_profiles.${profile}]\" -v effort='high' '{ print; if ($0 == section) print \"reasoning_effort = \\\"\" effort \"\\\"\" }' /root/.config/claux/config.toml > /root/.config/claux/config.toml.partial &&    mv /root/.config/claux/config.toml.partial /root/.config/claux/config.toml &&    OPENROUTER_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-qwen/claux' --print \"$(cat '/var/tmp/agents-of-empires-qwen/instruction.md')\" --permission-mode bypass --output-format json --transcript '/var/tmp/agents-of-empires-qwen/transcript.json' > '/var/tmp/agents-of-empires-qwen/result.json'\nroot         683  0.2  2.6 104032 19244 ?        Sl   15:36   0:00 /var/tmp/agents-of-empires-qwen/claux --print Recover the stateful primary failure in the contract appended below. Preserve customer data and prevent split brain. Speed matters, but only a durable, fenced topology can win.   The 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.  # Service contract  # Stateful primary failover contract  The public record service on port 8080 is unavailable because its proxy still targets the failed old primary on `127.0.0.1:8081`. A healthy read-only replica is running on `127.0.0.1:8082`. Existing customer state is stored in `/var/lib/failover/records.sqlite3` and must not be discarded or replaced.  Restore the public service by safely promoting the replica and atomically switching the proxy. The replica reads its role from `/var/lib/failover/replica.role` on every request. It accepts writes only when that file contains `primary`. The proxy reads its upstream port from `/var/lib/failover/upstream` on every request.  The public API contract is:  - `GET /health`: `200` with exact body `ready`; - `GET /role`: `200` with exact body `primary` after promotion; - `PUT /records/<id>`: persist the UTF-8 body and return `204`; - `GET /records/<id>`: return the exact body, or `404` when absent.  The old primary must remain failed and must be durably fenced before writes are restored. Preserve `/var/lib/failover/primary.failed`, create `/var/lib/failover/primary.fenced`, and do not make port 8081 listen again. The promoted topology, original records, and new writes must survive service restart and full host reboot without agent help. --permission-mode bypass --output-format json --transcript /var/tmp/agents-of-empires-qwen/transcript.json\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "The output of the first Bash call was suppressed (binary). Let me re-read the file with the Read tool instead.\n\nCurrent state:\n- Proxy on 8080: /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py (pid 555)\n- Replica on 8082: /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py (pid 556)\n- Nothing on 8081 (the old primary has already stopped).\n\nThese are nix store paths, so is the host managed by NixOS? But systemd-resolved is running. Let me check whether it's systemd. I'll read the files inside /var/lib/failover with the Read tool and check the service configuration.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "The output of the first Bash call was suppressed (binary). Let me re-read the file with the Read tool instead.\n\nCurrent state:\n- Proxy on 8080: /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py (pid 555)\n- Replica on 8082: /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py (pid 556)\n- Nothing on 8081 (the old primary has already stopped).\n\nThese are nix store paths, so is the host managed by NixOS? But systemd-resolved is running. Let me check whether it's systemd. I'll read the files inside /var/lib/failover with the Read tool and check the service configuration.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "The proxy (8080) and replica (8082) are running; nothing on 8081. Let me inspect the state files and service definitions.\n\n"
        },
        {
          "type": "tool_use",
          "id": "call_f70c399f3143470daf8eba8c",
          "name": "Bash",
          "input": {
            "command": "ls -la /var/lib/failover/; echo ---; file /var/lib/failover/* 2>/dev/null; echo ---; systemctl --version 2>/dev/null | head -1; echo ---; systemctl list-units --all 2>/dev/null | grep -Ei 'failover|proxy|replica|primary|record' ; systemctl list-unit-files 2>/dev/null | grep -Ei 'failover|proxy|replica|primary|record'",
            "description": "Inspect state files and systemd units"
          }
        },
        {
          "type": "tool_use",
          "id": "call_215e7e622737430d8a95ff8b",
          "name": "Bash",
          "input": {
            "command": "for f in /var/lib/failover/replica.role /var/lib/failover/upstream /var/lib/failover/primary.failed /var/lib/failover/primary.fenced; do echo \"== $f\"; od -c \"$f\" 2>&1 | head -3; done",
            "description": "Dump role/upstream/fence file contents"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_f70c399f3143470daf8eba8c",
          "content": "total 28\ndrwxr-xr-x 2 root root  4096 Sep 10 15:36 .\ndrwxr-xr-x 9 root root  4096 Sep 10 15:36 ..\n-rw-r--r-- 1 root root     0 Sep 10 15:36 primary.failed\n-rw-r--r-- 1 root root 12288 Sep 10 15:36 records.sqlite3\n-rw-r--r-- 1 root root     8 Sep 10 15:36 replica.role\n-rw-r--r-- 1 root root     5 Sep 10 15:36 upstream\n---\n---\nsystemd 261 (261.1)\n---\n  failover-proxy.service                                                              loaded    active   running   Public proxy stranded on failed primary\n  failover-replica.service                                                            loaded    active   running   Healthy read-only failover replica\n  failover-seed.service                                                               loaded    active   exited    Seed failed-primary topology and replicated state\n  systemd-pcrlogin@0.service                                                          loaded    inactive dead      TPM NvPCR Measurement of User Record for UID 0\n  systemd-update-utmp.service                                                         loaded    active   exited    Record System Boot/Shutdown in UTMP\nfailover-proxy.service                      enabled         ignored\nfailover-replica.service                    enabled         ignored\nfailover-seed.service                       enabled         ignored\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_215e7e622737430d8a95ff8b",
          "content": "== /var/lib/failover/replica.role\n0000000   r   e   p   l   i   c   a  \\n\n0000010\n== /var/lib/failover/upstream\n0000000   8   0   8   1  \\n\n0000005\n== /var/lib/failover/primary.failed\n0000000\n== /var/lib/failover/primary.fenced\nod: /var/lib/failover/primary.fenced: No such file or directory\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Status:\n- replica.role = \"replica\\n\"\n- upstream = \"8081\\n\"\n- primary.failed exists (empty file, must be preserved)\n- primary.fenced does not exist — I need to create it myself.\n- records.sqlite3 exists (12288 bytes).\n- systemd services: failover-proxy.service, failover-replica.service, failover-seed.service — all \"enabled\". The seed service has already run (exited). Important: failover-seed.service seeds the \"failed-primary topology and replicated state\". On reboot it runs again, and may reset replica.role to \"replica\" and upstream to \"8081\" — this would destroy the promoted topology across reboots! I need to check the seed script and disable or modify it so that the promoted topology is maintained on reboot.\n\nLet me read the service unit files and scripts. The scripts are in the nix store: /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py and /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py. The nix store is read-only, but the unit files in /etc/systemd/system are editable.\n\nLet me look for the unit files and the seed script.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Status:\n- replica.role = \"replica\\n\"\n- upstream = \"8081\\n\"\n- primary.failed exists (empty file, must be preserved)\n- primary.fenced does not exist — I need to create it myself.\n- records.sqlite3 exists (12288 bytes).\n- systemd services: failover-proxy.service, failover-replica.service, failover-seed.service — all \"enabled\". The seed service has already run (exited). Important: failover-seed.service seeds the \"failed-primary topology and replicated state\". On reboot it runs again, and may reset replica.role to \"replica\" and upstream to \"8081\" — this would destroy the promoted topology across reboots! I need to check the seed script and disable or modify it so that the promoted topology is maintained on reboot.\n\nLet me read the service unit files and scripts. The scripts are in the nix store: /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py and /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py. The nix store is read-only, but the unit files in /etc/systemd/system are editable.\n\nLet me look for the unit files and the seed script.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "Key finding: `failover-seed.service` \"seeds failed-primary topology\" and is enabled — on reboot it would likely reset `replica.role=replica` and `upstream=8081`, undoing the promotion. Let me read the units and scripts.\n\n"
        },
        {
          "type": "tool_use",
          "id": "call_d9504fd40e4d415b84d72f6d",
          "name": "Bash",
          "input": {
            "command": "systemctl cat failover-proxy.service failover-replica.service failover-seed.service 2>&1",
            "description": "Show unit definitions"
          }
        },
        {
          "type": "tool_use",
          "id": "call_82d34b6207494b73b98d234a",
          "name": "Bash",
          "input": {
            "command": "ls /nix/store/*failover* /nix/store/*seed* 2>/dev/null",
            "description": "Locate failover scripts in nix store"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_d9504fd40e4d415b84d72f6d",
          "content": "# /etc/systemd/system/failover-proxy.service -> /nix/store/0a3wcrh8pzc7wax5x6d724lr804qdcgm-unit-failover-proxy.service/failover-proxy.service\n[Unit]\nAfter=failover-seed.service\nDescription=Public proxy stranded on failed primary\nRequires=failover-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 /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n\n# /etc/systemd/system/failover-replica.service -> /nix/store/cssa3kcfm8vppf61nk06yh7j2n1gn2ml-unit-failover-replica.service/failover-replica.service\n[Unit]\nAfter=failover-seed.service\nDescription=Healthy read-only failover replica\nRequires=failover-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 /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n\n# /etc/systemd/system/failover-seed.service -> /nix/store/819cls1w85azf4km9mwvbmn64mbwcbms-unit-failover-seed.service/failover-seed.service\n[Unit]\nBefore=failover-replica.service failover-proxy.service\nDescription=Seed failed-primary topology and replicated state\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/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start \nRemainAfterExit=true\nType=oneshot\n\n[Install]\nWantedBy=multi-user.target\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_82d34b6207494b73b98d234a",
          "content": "/nix/store/23728y7zgh1jb55kpwxv5qnjbq0ykca6-randstruct-provide-seed-5.19.patch\n/nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\n/nix/store/5h8n2bwv9if473r8ibdj1ryhzsh36l0w-unit-rollout-seed.service.drv\n/nix/store/8di1gyrag3hq9bw4nv6cic0ilxv1jfjg-failover-proxy.py.drv\n/nix/store/97pnrhnr3pyb3jxhdhr8ly0pc9cmjl3s-unit-script-traffic-surge-seed-start.drv\n/nix/store/dzx73zf5xl8bsdjjwvvabrbvjlg85d75-unit-failover-proxy.service.drv\n/nix/store/fq4zqfan2g2zlbwi96cwc3j8yivji5zv-nixos-system-failover-two-26.11.20260813.0e251e2.drv\n/nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\n/nix/store/h1zmcrbr7qq6l8k485pbq368f7l1bs47-unit-script-rollout-seed-start.drv\n/nix/store/h5fs814wf6aqrk2q8l1d8w6nj74cpm9v-nixos-system-failover-three-26.11.20260813.0e251e2.drv\n/nix/store/j0nwphg0lcqifqgd47f4fr0hagarw1gy-unit-systemd-random-seed.service.drv\n/nix/store/j76if9fyh6aw41qvc8nqr9c8ha4azayn-hex0-seed.drv\n/nix/store/jhhs55ynhxhwkyr6b0icbbx7zxlhwhii-nixos-system-failover-one-26.11.20260813.0e251e2.drv\n/nix/store/k3kaqylbhyxkgaza3w5f93lcq3zaqkjd-unit-script-failover-seed-start.drv\n/nix/store/k3kaqylbhyxkgaza3w5f93lcq3zaqkjd-unit-script-failover-seed-start.drv\n/nix/store/li5hqxls0gdvxnwgiqgzysd2k88nf3an-unit-systemd-random-seed.service.drv\n/nix/store/lq6afyhfwn4n0r5h2fvz90y8q1w5d68h-unit-systemd-random-seed.service.drv\n/nix/store/misrfiajc5i6x5xxr0slkj9flhwfdkxx-unit-traffic-surge-seed.service.drv\n/nix/store/njc1rg137snycq9pvldvi8b1aaf3plbf-unit-systemd-boot-random-seed.service.drv\n/nix/store/paq9rb4b22ijykdglwvsv1j4y6nrk7lb-unit-systemd-boot-random-seed.service.drv\n/nix/store/qhdq62mip7q0k7bjhdwidm3k7pxjbdch-unit-failover-seed.service.drv\n/nix/store/qhdq62mip7q0k7bjhdwidm3k7pxjbdch-unit-failover-seed.service.drv\n/nix/store/qqvrshj7ppqfcga9ajjxz52f9lyl9wsh-unit-failover-replica.service.drv\n/nix/store/yn0iabm0h5xahc4r2isj8jshiwn1va36-failover-replica.py.drv\n\n/nix/store/0a3wcrh8pzc7wax5x6d724lr804qdcgm-unit-failover-proxy.service:\nfailover-proxy.service\n\n/nix/store/0ky46lp0ljmkfv9y4sc1w4n2vfkydj8v-unit-rollout-seed.service:\nrollout-seed.service\n\n/nix/store/1ica3yb0z4nix9x4imij6yb9fm8hywgc-unit-systemd-boot-random-seed.service:\nsystemd-boot-random-seed.service\n\n/nix/store/2zm0hvwn29vj0dyw0jm9k3i0mim150wx-unit-script-traffic-surge-seed-start:\nbin\n\n/nix/store/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start:\nbin\n\n/nix/store/819cls1w85azf4km9mwvbmn64mbwcbms-unit-failover-seed.service:\nfailover-seed.service\n\n/nix/store/819cls1w85azf4km9mwvbmn64mbwcbms-unit-failover-seed.service:\nfailover-seed.service\n\n/nix/store/99lh6543zrnz8nadygg9xz3vz11aywr2-nixos-system-failover-three-26.11.20260813.0e251e2:\nactivate\nbin\nboot.json\nconfiguration-name\ndry-activate\netc\nextra-dependencies\nfirmware\ninit\ninit-interface-version\ninitrd\nkernel\nkernel-modules\nkernel-params\nnixos-version\nprepare-root\nspecialisation\nsw\nswitch-inhibitors\nsystem\nsystemd\n\n/nix/store/cnd1jgdzml9qyjlara626c5x0fqcb06r-unit-traffic-surge-seed.service:\ntraffic-surge-seed.service\n\n/nix/store/cssa3kcfm8vppf61nk06yh7j2n1gn2ml-unit-failover-replica.service:\nfailover-replica.service\n\n/nix/store/i3f72kibv0ndv3xb5hjx9hrnkf4r1y4m-unit-systemd-random-seed.service:\nsystemd-random-seed.service\n\n/nix/store/k2qalfpdl8bh151cl0w19q2933zw0cfb-unit-systemd-random-seed.service:\nsystemd-random-seed.service\n\n/nix/store/mzixgmr2znl0fsz34nvfipp0jsj53b8j-unit-systemd-random-seed.service:\nsystemd-random-seed.service\n\n/nix/store/qvnwg26vgh4zzmkk2r1dw5k5cfy2v1rs-unit-systemd-boot-random-seed.service:\nsystemd-boot-random-seed.service\n\n/nix/store/rn4ambqqvxbb2ng23l9f088xhdn2ham9-nixos-system-failover-two-26.11.20260813.0e251e2:\nactivate\nbin\nboot.json\nconfiguration-name\ndry-activate\netc\nextra-dependencies\nfirmware\ninit\ninit-interface-version\ninitrd\nkernel\nkernel-modules\nkernel-params\nnixos-version\nprepare-root\nspecialisation\nsw\nswitch-inhibitors\nsystem\nsystemd\n\n/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start:\nbin\n\n/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start:\nbin\n\n/nix/store/yqlfx9gc823yx0d4sh9z3kf3y8yh8rnx-nixos-system-failover-one-26.11.20260813.0e251e2:\nactivate\nbin\nboot.json\nconfiguration-name\ndry-activate\netc\nextra-dependencies\nfirmware\ninit\ninit-interface-version\ninitrd\nkernel\nkernel-modules\nkernel-params\nnixos-version\nprepare-root\nspecialisation\nsw\nswitch-inhibitors\nsystem\nsystemd\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "This is a NixOS system. The unit files inside /etc/systemd/system are symlinks to the nix store (read-only). The seed service runs a script located at /nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start.\n\nImportant: The seed service is oneshot with RemainAfterExit=true, and is `enabled` (WantedBy=multi-user.target). At boot time, it runs before the replica and proxy, and probably recreates the topology files (replica.role=replica, upstream=8081, primary.failed) — possibly overwriting records.sqlite3 as well. To understand the exact behavior, let's read the seed script and the proxy/replica python files.\n\nSince it's NixOS, at reboot the activation process regenerates the symlinks in /etc/systemd/system from the store. If we `systemctl disable failover-seed.service`, the multi-user.target.wants symlink under /etc/systemd/system gets removed... but wait, on NixOS, /etc/systemd/system is under nix store control. In fact, on NixOS, the unit files and wants symlinks inside /etc/systemd/system are created by activation. If we run `systemctl disable`, those symlinks get removed, but will the NixOS activation on the next boot recreate them? Actually no — NixOS activation runs when `nixos-rebuild` is executed, not at boot time. At boot time, systemd uses /etc/systemd/system as it exists on disk. Hmm, but there might be something like `etc/...`. On NixOS, /etc/systemd/system is a real directory populated by the activation script. At boot time the activation script does not run. Therefore, changes made via systemctl enable/disable persist across reboots unless nixos-rebuild is executed.\n\nBut wait — this might be a container (there are sshd, systemd-resolved, etc...). Let's check whether it's a NixOS container or a VM. The contract says \"full host reboot\" — the referee will presumably reboot the host and check that the topology persists. So we must ensure that on reboot:\n\n1. failover-seed.service does not reset replica.role/upstream to failed-primary topology (or, alternatively, if the seed script is written to skip when a fenced file exists, we might rely on that — need to read it).\n2. The replica and proxy start up automatically (already enabled).\n3. primary.fenced and primary.failed exist and persist.\n4. 8081 never listens: presumably nothing binds 8081 to begin with (the old primary is failed/dead). Verify that no service exists that starts an old primary. There might be a \"failover-primary.service\" — not shown in the list. OK.\n5. records.sqlite3 persists along with its data.\n\nAlright, let's read the seed script, the proxy, and the replica code. These are in the read-only nix store, but we can read them.\n",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "This is a NixOS system. The unit files inside /etc/systemd/system are symlinks to the nix store (read-only). The seed service runs a script located at /nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start.\n\nImportant: The seed service is oneshot with RemainAfterExit=true, and is `enabled` (WantedBy=multi-user.target). At boot time, it runs before the replica and proxy, and probably recreates the topology files (replica.role=replica, upstream=8081, primary.failed) — possibly overwriting records.sqlite3 as well. To understand the exact behavior, let's read the seed script and the proxy/replica python files.\n\nSince it's NixOS, at reboot the activation process regenerates the symlinks in /etc/systemd/system from the store. If we `systemctl disable failover-seed.service`, the multi-user.target.wants symlink under /etc/systemd/system gets removed... but wait, on NixOS, /etc/systemd/system is under nix store control. In fact, on NixOS, the unit files and wants symlinks inside /etc/systemd/system are created by activation. If we run `systemctl disable`, those symlinks get removed, but will the NixOS activation on the next boot recreate them? Actually no — NixOS activation runs when `nixos-rebuild` is executed, not at boot time. At boot time, systemd uses /etc/systemd/system as it exists on disk. Hmm, but there might be something like `etc/...`. On NixOS, /etc/systemd/system is a real directory populated by the activation script. At boot time the activation script does not run. Therefore, changes made via systemctl enable/disable persist across reboots unless nixos-rebuild is executed.\n\nBut wait — this might be a container (there are sshd, systemd-resolved, etc...). Let's check whether it's a NixOS container or a VM. The contract says \"full host reboot\" — the referee will presumably reboot the host and check that the topology persists. So we must ensure that on reboot:\n\n1. failover-seed.service does not reset replica.role/upstream to failed-primary topology (or, alternatively, if the seed script is written to skip when a fenced file exists, we might rely on that — need to read it).\n2. The replica and proxy start up automatically (already enabled).\n3. primary.fenced and primary.failed exist and persist.\n4. 8081 never listens: presumably nothing binds 8081 to begin with (the old primary is failed/dead). Verify that no service exists that starts an old primary. There might be a \"failover-primary.service\" — not shown in the list. OK.\n5. records.sqlite3 persists along with its data.\n\nAlright, let's read the seed script, the proxy, and the replica code. These are in the read-only nix store, but we can read them.\n",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "NixOS host. Now let me read the seed script and the two Python services to understand exact semantics.\n\n"
        },
        {
          "type": "tool_use",
          "id": "call_a89d6755f5664305add03f8a",
          "name": "Read",
          "input": {
            "file_path": "/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start"
          }
        },
        {
          "type": "tool_use",
          "id": "call_d3240553910a449d82301b20",
          "name": "Read",
          "input": {
            "file_path": "/nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py"
          }
        },
        {
          "type": "tool_use",
          "id": "call_4b8b7773f2d349efa4fd0c07",
          "name": "Read",
          "input": {
            "file_path": "/nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_a89d6755f5664305add03f8a",
          "content": "1\t#!/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash\n2\tset -e\n3\t\n4\tinstall -d -m 0755 /var/lib/failover\n5\t[[ -e /var/lib/failover/upstream ]] || printf '8081\\n' > /var/lib/failover/upstream\n6\t[[ -e /var/lib/failover/replica.role ]] || printf 'replica\\n' > /var/lib/failover/replica.role\n7\ttouch /var/lib/failover/primary.failed\n8\t/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python - <<'PY'\n9\timport sqlite3\n10\tdb=sqlite3.connect('/var/lib/failover/records.sqlite3')\n11\tdb.execute('CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)')\n12\tfor record,value in [('customer-red-4a7','red-original'),('customer-blue-8d2','blue-original'),('customer-green-f31','green-original')]:\n13\t    db.execute('INSERT OR IGNORE INTO records(id,value) VALUES(?,?)',(record,value))\n14\tdb.commit()\n15\tPY\n16\t\n17\t\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_d3240553910a449d82301b20",
          "content": "1\timport http.client\n2\tfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n3\tUPSTREAM = \"/var/lib/failover/upstream\"\n4\tclass Handler(BaseHTTPRequestHandler):\n5\t    def forward(self):\n6\t        try:\n7\t            with open(UPSTREAM) as source: port = int(source.read().strip())\n8\t            body = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\")))\n9\t            connection = http.client.HTTPConnection(\"127.0.0.1\", port, timeout=2)\n10\t            connection.request(self.command, self.path, body=body)\n11\t            response = connection.getresponse(); data = response.read()\n12\t            self.send_response(response.status); self.send_header(\"Content-Length\", str(len(data))); self.end_headers(); self.wfile.write(data)\n13\t            connection.close()\n14\t        except Exception:\n15\t            self.send_response(502); self.send_header(\"Content-Length\", \"0\"); self.end_headers()\n16\t    do_GET = forward\n17\t    do_PUT = forward\n18\t    def log_message(self, *_): pass\n19\tThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_4b8b7773f2d349efa4fd0c07",
          "content": "1\timport sqlite3\n2\tfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n3\tDB = \"/var/lib/failover/records.sqlite3\"\n4\tROLE = \"/var/lib/failover/replica.role\"\n5\tdef role():\n6\t    with open(ROLE) as source: return source.read().strip()\n7\tdef database():\n8\t    connection = sqlite3.connect(DB, timeout=10)\n9\t    connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n10\t    return connection\n11\tclass Handler(BaseHTTPRequestHandler):\n12\t    def send(self, status, body=b\"\"):\n13\t        self.send_response(status); self.send_header(\"Content-Length\", str(len(body))); self.end_headers(); self.wfile.write(body)\n14\t    def do_GET(self):\n15\t        if self.path == \"/health\": self.send(200, b\"ready\"); return\n16\t        if self.path == \"/role\": self.send(200, role().encode()); return\n17\t        if self.path.startswith(\"/records/\"):\n18\t            connection = database(); row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone(); connection.close()\n19\t            self.send(404 if row is None else 200, b\"\" if row is None else row[0].encode()); return\n20\t        self.send(404)\n21\t    def do_PUT(self):\n22\t        if not self.path.startswith(\"/records/\"): self.send(404); return\n23\t        if role() != \"primary\": self.send(503, b\"read-only\"); return\n24\t        value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode(); connection = database()\n25\t        connection.execute(\"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\", (self.path[9:], value))\n26\t        connection.commit(); connection.close(); self.send(204)\n27\t    def log_message(self, *_): pass\n28\tThreadingHTTPServer((\"127.0.0.1\", 8082), Handler).serve_forever()\n"
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "call_d430c3f324c74ebb93b8e5cf",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Inspecting current failover state",
            "content": "Inspect current state (processes, ports, files, service manager)",
            "status": "in_progress"
          },
          {
            "activeForm": "Fencing old primary",
            "content": "Fence old primary durably (primary.fenced, no 8081 listener, survive reboot)",
            "status": "pending"
          },
          {
            "activeForm": "Promoting replica",
            "content": "Promote replica (replica.role=primary, durable)",
            "status": "pending"
          },
          {
            "activeForm": "Switching proxy upstream",
            "content": "Atomically switch proxy upstream to 8082",
            "status": "pending"
          },
          {
            "activeForm": "Making topology reboot-durable",
            "content": "Ensure services survive restart and full reboot",
            "status": "pending"
          },
          {
            "activeForm": "Verifying API and reboot durability",
            "content": "Verify public API contract end-to-end incl. reboot simulation",
            "status": "pending"
          }
        ]
      },
      "output": "Added:\n  + Inspect current state (processes, ports, files, service manager)\n  + Fence old primary durably (primary.fenced, no 8081 listener, survive reboot)\n  + Promote replica (replica.role=primary, durable)\n  + Atomically switch proxy upstream to 8082\n  + Ensure services survive restart and full reboot\n  + Verify public API contract end-to-end incl. reboot simulation\n\nCurrent tasks:\n  ◉ Inspect current state (processes, ports, files, service manager)\n  ○ Fence old primary durably (primary.fenced, no 8081 listener, survive reboot)\n  ○ Promote replica (replica.role=primary, durable)\n  ○ Atomically switch proxy upstream to 8082\n  ○ Ensure services survive restart and full reboot\n  ○ Verify public API contract end-to-end incl. reboot simulation\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 26458,
      "duration_ms": 0
    },
    {
      "id": "call_83a876dd595f4c599cb602ad",
      "name": "Bash",
      "input": {
        "command": "ls -la /var/lib/failover/ 2>&1; echo ---; for f in /var/lib/failover/*; do echo \"== $f\"; cat \"$f\" 2>/dev/null | head -5; echo; done",
        "description": "List failover state directory"
      },
      "output": "[binary stdout suppressed: 12765 bytes]",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 26458,
      "duration_ms": 58
    },
    {
      "id": "call_062859e0ed7f4185b6d04797",
      "name": "Bash",
      "input": {
        "command": "ss -tlnp 2>/dev/null || netstat -tlnp 2>/dev/null; echo ---; ps aux | grep -Ei 'proxy|record|replica|primary|8080|8081|8082|uvicorn|python|node' | grep -v grep",
        "description": "Show listening ports and related processes"
      },
      "output": "State  Recv-Q Send-Q Local Address:Port  Peer Address:PortProcess\nLISTEN 0      128        127.0.0.1:18002      0.0.0.0:*    users:((\"sshd-session\",pid=629,fd=10))\nLISTEN 0      4096      127.0.0.54:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=302,fd=25))\nLISTEN 0      4096   127.0.0.53%lo:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=302,fd=23))\nLISTEN 0      5            0.0.0.0:8080       0.0.0.0:*    users:((\"python\",pid=555,fd=3))\nLISTEN 0      128          0.0.0.0:22         0.0.0.0:*    users:((\"sshd\",pid=570,fd=6))\nLISTEN 0      4096         0.0.0.0:5355       0.0.0.0:*    users:((\"systemd-resolve\",pid=302,fd=14))\nLISTEN 0      5          127.0.0.1:8082       0.0.0.0:*    users:((\"python\",pid=556,fd=3))\nLISTEN 0      128             [::]:22            [::]:*    users:((\"sshd\",pid=570,fd=7))\nLISTEN 0      4096            [::]:5355          [::]:*    users:((\"systemd-resolve\",pid=302,fd=16))\n---\nroot         555  0.5  3.3 112160 24064 ?        Ss   15:36   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\nroot         556  0.5  3.3  40360 24604 ?        Ss   15:36   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\nroot         671  0.1  0.4   7980  3228 ?        Ss   15:36   0:00 bash -c chmod 0700 '/var/tmp/agents-of-empires-qwen/claux' &&    cd /root &&    OPENROUTER_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-qwen/claux' config init --provider openrouter --model 'qwen/qwen3.8-max-0902' >/dev/null &&    sed -i 's#^base_url = .*#base_url = \"http://127.0.0.1:18002/api/v1\"#' /root/.config/claux/config.toml &&    sed -i 's/^native_tool_filesystem_policy = .*/native_tool_filesystem_policy = \"unrestricted\"/' /root/.config/claux/config.toml &&    sed -i 's/^bash_filesystem_policy = .*/bash_filesystem_policy = \"unrestricted\"/' /root/.config/claux/config.toml &&    profile=$(sed -n 's/^default_profile = \"\\([^\"]*\\)\"/\\1/p' /root/.config/claux/config.toml) &&    awk -v section=\"[model_profiles.${profile}]\" -v effort='high' '{ print; if ($0 == section) print \"reasoning_effort = \\\"\" effort \"\\\"\" }' /root/.config/claux/config.toml > /root/.config/claux/config.toml.partial &&    mv /root/.config/claux/config.toml.partial /root/.config/claux/config.toml &&    OPENROUTER_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-qwen/claux' --print \"$(cat '/var/tmp/agents-of-empires-qwen/instruction.md')\" --permission-mode bypass --output-format json --transcript '/var/tmp/agents-of-empires-qwen/transcript.json' > '/var/tmp/agents-of-empires-qwen/result.json'\nroot         683  0.2  2.6 104032 19244 ?        Sl   15:36   0:00 /var/tmp/agents-of-empires-qwen/claux --print Recover the stateful primary failure in the contract appended below. Preserve customer data and prevent split brain. Speed matters, but only a durable, fenced topology can win.   The 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.  # Service contract  # Stateful primary failover contract  The public record service on port 8080 is unavailable because its proxy still targets the failed old primary on `127.0.0.1:8081`. A healthy read-only replica is running on `127.0.0.1:8082`. Existing customer state is stored in `/var/lib/failover/records.sqlite3` and must not be discarded or replaced.  Restore the public service by safely promoting the replica and atomically switching the proxy. The replica reads its role from `/var/lib/failover/replica.role` on every request. It accepts writes only when that file contains `primary`. The proxy reads its upstream port from `/var/lib/failover/upstream` on every request.  The public API contract is:  - `GET /health`: `200` with exact body `ready`; - `GET /role`: `200` with exact body `primary` after promotion; - `PUT /records/<id>`: persist the UTF-8 body and return `204`; - `GET /records/<id>`: return the exact body, or `404` when absent.  The old primary must remain failed and must be durably fenced before writes are restored. Preserve `/var/lib/failover/primary.failed`, create `/var/lib/failover/primary.fenced`, and do not make port 8081 listen again. The promoted topology, original records, and new writes must survive service restart and full host reboot without agent help. --permission-mode bypass --output-format json --transcript /var/tmp/agents-of-empires-qwen/transcript.json\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 26517,
      "duration_ms": 46
    },
    {
      "id": "call_f70c399f3143470daf8eba8c",
      "name": "Bash",
      "input": {
        "command": "ls -la /var/lib/failover/; echo ---; file /var/lib/failover/* 2>/dev/null; echo ---; systemctl --version 2>/dev/null | head -1; echo ---; systemctl list-units --all 2>/dev/null | grep -Ei 'failover|proxy|replica|primary|record' ; systemctl list-unit-files 2>/dev/null | grep -Ei 'failover|proxy|replica|primary|record'",
        "description": "Inspect state files and systemd units"
      },
      "output": "total 28\ndrwxr-xr-x 2 root root  4096 Sep 10 15:36 .\ndrwxr-xr-x 9 root root  4096 Sep 10 15:36 ..\n-rw-r--r-- 1 root root     0 Sep 10 15:36 primary.failed\n-rw-r--r-- 1 root root 12288 Sep 10 15:36 records.sqlite3\n-rw-r--r-- 1 root root     8 Sep 10 15:36 replica.role\n-rw-r--r-- 1 root root     5 Sep 10 15:36 upstream\n---\n---\nsystemd 261 (261.1)\n---\n  failover-proxy.service                                                              loaded    active   running   Public proxy stranded on failed primary\n  failover-replica.service                                                            loaded    active   running   Healthy read-only failover replica\n  failover-seed.service                                                               loaded    active   exited    Seed failed-primary topology and replicated state\n  systemd-pcrlogin@0.service                                                          loaded    inactive dead      TPM NvPCR Measurement of User Record for UID 0\n  systemd-update-utmp.service                                                         loaded    active   exited    Record System Boot/Shutdown in UTMP\nfailover-proxy.service                      enabled         ignored\nfailover-replica.service                    enabled         ignored\nfailover-seed.service                       enabled         ignored\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 39563,
      "duration_ms": 4899
    },
    {
      "id": "call_215e7e622737430d8a95ff8b",
      "name": "Bash",
      "input": {
        "command": "for f in /var/lib/failover/replica.role /var/lib/failover/upstream /var/lib/failover/primary.failed /var/lib/failover/primary.fenced; do echo \"== $f\"; od -c \"$f\" 2>&1 | head -3; done",
        "description": "Dump role/upstream/fence file contents"
      },
      "output": "== /var/lib/failover/replica.role\n0000000   r   e   p   l   i   c   a  \\n\n0000010\n== /var/lib/failover/upstream\n0000000   8   0   8   1  \\n\n0000005\n== /var/lib/failover/primary.failed\n0000000\n== /var/lib/failover/primary.fenced\nod: /var/lib/failover/primary.fenced: No such file or directory\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 44463,
      "duration_ms": 58
    },
    {
      "id": "call_d9504fd40e4d415b84d72f6d",
      "name": "Bash",
      "input": {
        "command": "systemctl cat failover-proxy.service failover-replica.service failover-seed.service 2>&1",
        "description": "Show unit definitions"
      },
      "output": "# /etc/systemd/system/failover-proxy.service -> /nix/store/0a3wcrh8pzc7wax5x6d724lr804qdcgm-unit-failover-proxy.service/failover-proxy.service\n[Unit]\nAfter=failover-seed.service\nDescription=Public proxy stranded on failed primary\nRequires=failover-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 /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n\n# /etc/systemd/system/failover-replica.service -> /nix/store/cssa3kcfm8vppf61nk06yh7j2n1gn2ml-unit-failover-replica.service/failover-replica.service\n[Unit]\nAfter=failover-seed.service\nDescription=Healthy read-only failover replica\nRequires=failover-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 /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n\n# /etc/systemd/system/failover-seed.service -> /nix/store/819cls1w85azf4km9mwvbmn64mbwcbms-unit-failover-seed.service/failover-seed.service\n[Unit]\nBefore=failover-replica.service failover-proxy.service\nDescription=Seed failed-primary topology and replicated state\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/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start \nRemainAfterExit=true\nType=oneshot\n\n[Install]\nWantedBy=multi-user.target\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 57835,
      "duration_ms": 24
    },
    {
      "id": "call_82d34b6207494b73b98d234a",
      "name": "Bash",
      "input": {
        "command": "ls /nix/store/*failover* /nix/store/*seed* 2>/dev/null",
        "description": "Locate failover scripts in nix store"
      },
      "output": "/nix/store/23728y7zgh1jb55kpwxv5qnjbq0ykca6-randstruct-provide-seed-5.19.patch\n/nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\n/nix/store/5h8n2bwv9if473r8ibdj1ryhzsh36l0w-unit-rollout-seed.service.drv\n/nix/store/8di1gyrag3hq9bw4nv6cic0ilxv1jfjg-failover-proxy.py.drv\n/nix/store/97pnrhnr3pyb3jxhdhr8ly0pc9cmjl3s-unit-script-traffic-surge-seed-start.drv\n/nix/store/dzx73zf5xl8bsdjjwvvabrbvjlg85d75-unit-failover-proxy.service.drv\n/nix/store/fq4zqfan2g2zlbwi96cwc3j8yivji5zv-nixos-system-failover-two-26.11.20260813.0e251e2.drv\n/nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\n/nix/store/h1zmcrbr7qq6l8k485pbq368f7l1bs47-unit-script-rollout-seed-start.drv\n/nix/store/h5fs814wf6aqrk2q8l1d8w6nj74cpm9v-nixos-system-failover-three-26.11.20260813.0e251e2.drv\n/nix/store/j0nwphg0lcqifqgd47f4fr0hagarw1gy-unit-systemd-random-seed.service.drv\n/nix/store/j76if9fyh6aw41qvc8nqr9c8ha4azayn-hex0-seed.drv\n/nix/store/jhhs55ynhxhwkyr6b0icbbx7zxlhwhii-nixos-system-failover-one-26.11.20260813.0e251e2.drv\n/nix/store/k3kaqylbhyxkgaza3w5f93lcq3zaqkjd-unit-script-failover-seed-start.drv\n/nix/store/k3kaqylbhyxkgaza3w5f93lcq3zaqkjd-unit-script-failover-seed-start.drv\n/nix/store/li5hqxls0gdvxnwgiqgzysd2k88nf3an-unit-systemd-random-seed.service.drv\n/nix/store/lq6afyhfwn4n0r5h2fvz90y8q1w5d68h-unit-systemd-random-seed.service.drv\n/nix/store/misrfiajc5i6x5xxr0slkj9flhwfdkxx-unit-traffic-surge-seed.service.drv\n/nix/store/njc1rg137snycq9pvldvi8b1aaf3plbf-unit-systemd-boot-random-seed.service.drv\n/nix/store/paq9rb4b22ijykdglwvsv1j4y6nrk7lb-unit-systemd-boot-random-seed.service.drv\n/nix/store/qhdq62mip7q0k7bjhdwidm3k7pxjbdch-unit-failover-seed.service.drv\n/nix/store/qhdq62mip7q0k7bjhdwidm3k7pxjbdch-unit-failover-seed.service.drv\n/nix/store/qqvrshj7ppqfcga9ajjxz52f9lyl9wsh-unit-failover-replica.service.drv\n/nix/store/yn0iabm0h5xahc4r2isj8jshiwn1va36-failover-replica.py.drv\n\n/nix/store/0a3wcrh8pzc7wax5x6d724lr804qdcgm-unit-failover-proxy.service:\nfailover-proxy.service\n\n/nix/store/0ky46lp0ljmkfv9y4sc1w4n2vfkydj8v-unit-rollout-seed.service:\nrollout-seed.service\n\n/nix/store/1ica3yb0z4nix9x4imij6yb9fm8hywgc-unit-systemd-boot-random-seed.service:\nsystemd-boot-random-seed.service\n\n/nix/store/2zm0hvwn29vj0dyw0jm9k3i0mim150wx-unit-script-traffic-surge-seed-start:\nbin\n\n/nix/store/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start:\nbin\n\n/nix/store/819cls1w85azf4km9mwvbmn64mbwcbms-unit-failover-seed.service:\nfailover-seed.service\n\n/nix/store/819cls1w85azf4km9mwvbmn64mbwcbms-unit-failover-seed.service:\nfailover-seed.service\n\n/nix/store/99lh6543zrnz8nadygg9xz3vz11aywr2-nixos-system-failover-three-26.11.20260813.0e251e2:\nactivate\nbin\nboot.json\nconfiguration-name\ndry-activate\netc\nextra-dependencies\nfirmware\ninit\ninit-interface-version\ninitrd\nkernel\nkernel-modules\nkernel-params\nnixos-version\nprepare-root\nspecialisation\nsw\nswitch-inhibitors\nsystem\nsystemd\n\n/nix/store/cnd1jgdzml9qyjlara626c5x0fqcb06r-unit-traffic-surge-seed.service:\ntraffic-surge-seed.service\n\n/nix/store/cssa3kcfm8vppf61nk06yh7j2n1gn2ml-unit-failover-replica.service:\nfailover-replica.service\n\n/nix/store/i3f72kibv0ndv3xb5hjx9hrnkf4r1y4m-unit-systemd-random-seed.service:\nsystemd-random-seed.service\n\n/nix/store/k2qalfpdl8bh151cl0w19q2933zw0cfb-unit-systemd-random-seed.service:\nsystemd-random-seed.service\n\n/nix/store/mzixgmr2znl0fsz34nvfipp0jsj53b8j-unit-systemd-random-seed.service:\nsystemd-random-seed.service\n\n/nix/store/qvnwg26vgh4zzmkk2r1dw5k5cfy2v1rs-unit-systemd-boot-random-seed.service:\nsystemd-boot-random-seed.service\n\n/nix/store/rn4ambqqvxbb2ng23l9f088xhdn2ham9-nixos-system-failover-two-26.11.20260813.0e251e2:\nactivate\nbin\nboot.json\nconfiguration-name\ndry-activate\netc\nextra-dependencies\nfirmware\ninit\ninit-interface-version\ninitrd\nkernel\nkernel-modules\nkernel-params\nnixos-version\nprepare-root\nspecialisation\nsw\nswitch-inhibitors\nsystem\nsystemd\n\n/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start:\nbin\n\n/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start:\nbin\n\n/nix/store/yqlfx9gc823yx0d4sh9z3kf3y8yh8rnx-nixos-system-failover-one-26.11.20260813.0e251e2:\nactivate\nbin\nboot.json\nconfiguration-name\ndry-activate\netc\nextra-dependencies\nfirmware\ninit\ninit-interface-version\ninitrd\nkernel\nkernel-modules\nkernel-params\nnixos-version\nprepare-root\nspecialisation\nsw\nswitch-inhibitors\nsystem\nsystemd\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 57860,
      "duration_ms": 488
    },
    {
      "id": "call_a89d6755f5664305add03f8a",
      "name": "Read",
      "input": {
        "file_path": "/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start"
      },
      "output": "1\t#!/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash\n2\tset -e\n3\t\n4\tinstall -d -m 0755 /var/lib/failover\n5\t[[ -e /var/lib/failover/upstream ]] || printf '8081\\n' > /var/lib/failover/upstream\n6\t[[ -e /var/lib/failover/replica.role ]] || printf 'replica\\n' > /var/lib/failover/replica.role\n7\ttouch /var/lib/failover/primary.failed\n8\t/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python - <<'PY'\n9\timport sqlite3\n10\tdb=sqlite3.connect('/var/lib/failover/records.sqlite3')\n11\tdb.execute('CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)')\n12\tfor record,value in [('customer-red-4a7','red-original'),('customer-blue-8d2','blue-original'),('customer-green-f31','green-original')]:\n13\t    db.execute('INSERT OR IGNORE INTO records(id,value) VALUES(?,?)',(record,value))\n14\tdb.commit()\n15\tPY\n16\t\n17\t\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 83756,
      "duration_ms": 1
    },
    {
      "id": "call_d3240553910a449d82301b20",
      "name": "Read",
      "input": {
        "file_path": "/nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py"
      },
      "output": "1\timport http.client\n2\tfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n3\tUPSTREAM = \"/var/lib/failover/upstream\"\n4\tclass Handler(BaseHTTPRequestHandler):\n5\t    def forward(self):\n6\t        try:\n7\t            with open(UPSTREAM) as source: port = int(source.read().strip())\n8\t            body = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\")))\n9\t            connection = http.client.HTTPConnection(\"127.0.0.1\", port, timeout=2)\n10\t            connection.request(self.command, self.path, body=body)\n11\t            response = connection.getresponse(); data = response.read()\n12\t            self.send_response(response.status); self.send_header(\"Content-Length\", str(len(data))); self.end_headers(); self.wfile.write(data)\n13\t            connection.close()\n14\t        except Exception:\n15\t            self.send_response(502); self.send_header(\"Content-Length\", \"0\"); self.end_headers()\n16\t    do_GET = forward\n17\t    do_PUT = forward\n18\t    def log_message(self, *_): pass\n19\tThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 83756,
      "duration_ms": 1
    },
    {
      "id": "call_4b8b7773f2d349efa4fd0c07",
      "name": "Read",
      "input": {
        "file_path": "/nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py"
      },
      "output": "1\timport sqlite3\n2\tfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n3\tDB = \"/var/lib/failover/records.sqlite3\"\n4\tROLE = \"/var/lib/failover/replica.role\"\n5\tdef role():\n6\t    with open(ROLE) as source: return source.read().strip()\n7\tdef database():\n8\t    connection = sqlite3.connect(DB, timeout=10)\n9\t    connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n10\t    return connection\n11\tclass Handler(BaseHTTPRequestHandler):\n12\t    def send(self, status, body=b\"\"):\n13\t        self.send_response(status); self.send_header(\"Content-Length\", str(len(body))); self.end_headers(); self.wfile.write(body)\n14\t    def do_GET(self):\n15\t        if self.path == \"/health\": self.send(200, b\"ready\"); return\n16\t        if self.path == \"/role\": self.send(200, role().encode()); return\n17\t        if self.path.startswith(\"/records/\"):\n18\t            connection = database(); row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone(); connection.close()\n19\t            self.send(404 if row is None else 200, b\"\" if row is None else row[0].encode()); return\n20\t        self.send(404)\n21\t    def do_PUT(self):\n22\t        if not self.path.startswith(\"/records/\"): self.send(404); return\n23\t        if role() != \"primary\": self.send(503, b\"read-only\"); return\n24\t        value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode(); connection = database()\n25\t        connection.execute(\"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\", (self.path[9:], value))\n26\t        connection.commit(); connection.close(); self.send(204)\n27\t    def log_message(self, *_): pass\n28\tThreadingHTTPServer((\"127.0.0.1\", 8082), Handler).serve_forever()\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 83756,
      "duration_ms": 1
    }
  ],
  "timing": {
    "total_duration_ms": 83758,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 26457,
        "status": "completed",
        "usage": {
          "input_tokens": 3552,
          "output_tokens": 979,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 0,
          "cost_usd": 0.012978
        }
      },
      {
        "index": 2,
        "started_after_ms": 26661,
        "duration_ms": 12901,
        "status": "completed",
        "usage": {
          "input_tokens": 3219,
          "output_tokens": 491,
          "cache_read_tokens": 3200,
          "cache_creation_tokens": 0,
          "cost_usd": 0.010184
        }
      },
      {
        "index": 3,
        "started_after_ms": 44524,
        "duration_ms": 13311,
        "status": "completed",
        "usage": {
          "input_tokens": 1248,
          "output_tokens": 483,
          "cache_read_tokens": 6144,
          "cache_creation_tokens": 0,
          "cost_usd": 0.00693
        }
      },
      {
        "index": 4,
        "started_after_ms": 58353,
        "duration_ms": 25402,
        "status": "completed",
        "usage": {
          "input_tokens": 4611,
          "output_tokens": 869,
          "cache_read_tokens": 7168,
          "cache_creation_tokens": 0,
          "cost_usd": 0.016228
        }
      }
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  }
}