{
  "schema_version": 2,
  "model": "anthropic/claude-fable-5.1",
  "outcome": {
    "status": "completed",
    "result": "I'll start by inspecting the current state of the host.Now let me read the proxy and replica source, and see how they're managed (systemd?).The seed service is the critical piece — it may reset the topology on reboot. Let me check it.Now verifying the public API through port 8080, then restarting the services to confirm the topology survives a restart.Failover is complete and the service is running for the referee.\n\n**What was done** (in split-brain-safe order, all state file writes via tmp + `fsync` + `rename` + directory `fsync`):\n\n1. **Preflight** – confirmed replica on 8082 was healthy and 8081 was refusing connections.\n2. **Fenced** – created `/var/lib/failover/primary.fenced` *before* enabling any writes; `primary.failed` preserved. No systemd unit exists for the old primary, so 8081 cannot come back on reboot.\n3. **Promoted** – `replica.role` → `primary` (replica re-reads it per request, no restart needed).\n4. **Switched proxy** – `upstream` → `8082` atomically via rename.\n\n**Verification through public port 8080:**\n- `/health` → `200 ready`, `/role` → `200 primary`\n- All 3 original records intact (`red/blue/green-original`), missing id → `404`\n- `PUT` → `204`, read-back exact (incl. UTF-8)\n- After `systemctl restart` of seed + replica + proxy: role/upstream/records/new write all persisted\n- 8081 not listening; `primary.failed` and `primary.fenced` both present\n\n**Reboot durability:** the seed script (`failover-seed-start`) only writes defaults when files are absent and uses `INSERT OR IGNORE`, so it won't revert `replica.role`/`upstream` or clobber records; `failover-replica` and `failover-proxy` are both `enabled` with `Restart=always`. The original SQLite file was never replaced — only appended to via the service's own commit path."
  },
  "usage": {
    "input_tokens": 70016,
    "output_tokens": 3222,
    "cache_read_tokens": 0,
    "cache_creation_tokens": 0,
    "cost_usd": 0.86126
  },
  "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.\n\n\nThe referee performs host reboot testing. Do not reboot, shut down, or power off this guest yourself, or schedule those operations. Leave the deployment running for the referee to test."
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "details": [
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "",
              "text": "",
              "type": "reasoning.text"
            },
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "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",
              "text": "",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "I'll start by inspecting the current state of the host."
        },
        {
          "type": "tool_use",
          "id": "toolu_01XNFMP2FHTViNdZ7Q5jLneW",
          "name": "Bash",
          "input": {
            "command": "ls -la /var/lib/failover/ 2>&1; echo ---; for f in /var/lib/failover/*; do [ -f \"$f\" ] && [ \"${f##*.}\" != \"sqlite3\" ] && { echo \"== $f\"; cat \"$f\"; echo; }; done; echo ---; ss -ltnp 2>/dev/null || netstat -ltnp; echo ---; ps aux | grep -v grep | grep -iE 'failover|proxy|replica|primary|python|node' ",
            "description": "Inspect failover state dir, listeners, processes"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "toolu_01XNFMP2FHTViNdZ7Q5jLneW",
          "content": "total 28\ndrwxr-xr-x 2 root root  4096 Oct 13 00:47 .\ndrwxr-xr-x 9 root root  4096 Oct 13 00:47 ..\n-rw-r--r-- 1 root root     0 Oct 13 00:47 primary.failed\n-rw-r--r-- 1 root root 12288 Oct 13 00:47 records.sqlite3\n-rw-r--r-- 1 root root     8 Oct 13 00:47 replica.role\n-rw-r--r-- 1 root root     5 Oct 13 00:47 upstream\n---\n== /var/lib/failover/primary.failed\n\n== /var/lib/failover/replica.role\nreplica\n\n== /var/lib/failover/upstream\n8081\n\n---\nState  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=635,fd=10))\nLISTEN 0      4096      127.0.0.54:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=300,fd=25))\nLISTEN 0      5            0.0.0.0:8080       0.0.0.0:*    users:((\"python\",pid=542,fd=3))\nLISTEN 0      4096   127.0.0.53%lo:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=300,fd=23))\nLISTEN 0      128          0.0.0.0:22         0.0.0.0:*    users:((\"sshd\",pid=573,fd=6))\nLISTEN 0      5          127.0.0.1:8082       0.0.0.0:*    users:((\"python\",pid=544,fd=3))\nLISTEN 0      4096         0.0.0.0:5355       0.0.0.0:*    users:((\"systemd-resolve\",pid=300,fd=14))\nLISTEN 0      128             [::]:22            [::]:*    users:((\"sshd\",pid=573,fd=7))\nLISTEN 0      4096            [::]:5355          [::]:*    users:((\"systemd-resolve\",pid=300,fd=16))\n---\nroot         542  1.5  3.4 113184 24904 ?        Ss   00:47   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\nroot         544  1.1  3.4  41384 25432 ?        Ss   00:47   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\nroot         680  0.0  0.4   7980  3232 ?        Ss   00:47   0:00 bash -c chmod 0700 '/var/tmp/agents-of-empires-fable/claux' '/var/tmp/agents-of-empires-fable/strace' &&    cd /root &&    AI_GATEWAY_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-fable/claux' config init --provider vercel --model 'anthropic/claude-fable-5.1' >/dev/null &&    sed -i 's#^base_url = .*#base_url = \"http://127.0.0.1:18002/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 ($0 == section && effort != \"\") print \"reasoning_effort = \\\"\" effort \"\\\"\" }' /root/.config/claux/config.toml > /root/.config/claux/config.toml.partial &&    mv /root/.config/claux/config.toml.partial /root/.config/claux/config.toml &&    AI_GATEWAY_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-fable/strace' --seccomp-bpf -f -qq -s 4096 -e trace=execve -o '/var/tmp/agents-of-empires-fable/exec.trace' '/var/tmp/agents-of-empires-fable/claux' --print \"$(cat '/var/tmp/agents-of-empires-fable/instruction.md')\" --permission-mode bypass --output-format json --transcript '/var/tmp/agents-of-empires-fable/transcript.json' > '/var/tmp/agents-of-empires-fable/result.json'\nroot         691  0.3  0.2   2772  1632 ?        S    00:47   0:00 /var/tmp/agents-of-empires-fable/strace --seccomp-bpf -f -qq -s 4096 -e trace=execve -o /var/tmp/agents-of-empires-fable/exec.trace /var/tmp/agents-of-empires-fable/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.   The referee performs host reboot testing. Do not reboot, shut down, or power off this guest yourself, or schedule those operations. Leave the deployment running for the referee to test. --permission-mode bypass --output-format json --transcript /var/tmp/agents-of-empires-fable/transcript.json\nroot         695  0.7  2.6 104020 18988 ?        Sl   00:47   0:00 /var/tmp/agents-of-empires-fable/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.   The referee performs host reboot testing. Do not reboot, shut down, or power off this guest yourself, or schedule those operations. Leave the deployment running for the referee to test. --permission-mode bypass --output-format json --transcript /var/tmp/agents-of-empires-fable/transcript.json\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "text",
          "text": "Now let me read the proxy and replica source, and see how they're managed (systemd?)."
        },
        {
          "type": "tool_use",
          "id": "toolu_01BpiLGqNt8v7ZW4ioEBY17U",
          "name": "Bash",
          "input": {
            "command": "cat /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py; echo \"==========\"; cat /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py; echo \"==========\"; systemctl list-units --type=service --all 2>/dev/null | grep -iE 'failover|proxy|replica|primary'; echo ---; systemctl cat failover-proxy failover-replica failover-primary 2>&1 | head -120",
            "description": "Read service source and systemd units"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "toolu_01BpiLGqNt8v7ZW4ioEBY17U",
          "content": "import http.client\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nUPSTREAM = \"/var/lib/failover/upstream\"\nclass Handler(BaseHTTPRequestHandler):\n    def forward(self):\n        try:\n            with open(UPSTREAM) as source: port = int(source.read().strip())\n            body = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\")))\n            connection = http.client.HTTPConnection(\"127.0.0.1\", port, timeout=2)\n            connection.request(self.command, self.path, body=body)\n            response = connection.getresponse(); data = response.read()\n            self.send_response(response.status); self.send_header(\"Content-Length\", str(len(data))); self.end_headers(); self.wfile.write(data)\n            connection.close()\n        except Exception:\n            self.send_response(502); self.send_header(\"Content-Length\", \"0\"); self.end_headers()\n    do_GET = forward\n    do_PUT = forward\n    def log_message(self, *_): pass\nThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n==========\nimport sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nDB = \"/var/lib/failover/records.sqlite3\"\nROLE = \"/var/lib/failover/replica.role\"\ndef role():\n    with open(ROLE) as source: return source.read().strip()\ndef database():\n    connection = sqlite3.connect(DB, timeout=10)\n    connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n    return connection\nclass Handler(BaseHTTPRequestHandler):\n    def send(self, status, body=b\"\"):\n        self.send_response(status); self.send_header(\"Content-Length\", str(len(body))); self.end_headers(); self.wfile.write(body)\n    def do_GET(self):\n        if self.path == \"/health\": self.send(200, b\"ready\"); return\n        if self.path == \"/role\": self.send(200, role().encode()); return\n        if self.path.startswith(\"/records/\"):\n            connection = database(); row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone(); connection.close()\n            self.send(404 if row is None else 200, b\"\" if row is None else row[0].encode()); return\n        self.send(404)\n    def do_PUT(self):\n        if not self.path.startswith(\"/records/\"): self.send(404); return\n        if role() != \"primary\": self.send(503, b\"read-only\"); return\n        value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode(); connection = database()\n        connection.execute(\"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\", (self.path[9:], value))\n        connection.commit(); connection.close(); self.send(204)\n    def log_message(self, *_): pass\nThreadingHTTPServer((\"127.0.0.1\", 8082), Handler).serve_forever()\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---\nNo files found for failover-primary.service.\n# /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"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "text",
          "text": "The seed service is the critical piece — it may reset the topology on reboot. Let me check it."
        },
        {
          "type": "tool_use",
          "id": "toolu_01HStAWcdVgSTWNWLhrUXTz1",
          "name": "Bash",
          "input": {
            "command": "systemctl cat failover-seed 2>&1; echo ----; f=$(systemctl show -p ExecStart failover-seed | grep -oE '/nix/store/[^ ;]+' | head -1); echo \"$f\"; cat \"$f\" 2>/dev/null; echo ----; sqlite3 /var/lib/failover/records.sqlite3 'select * from records;' 2>/dev/null || python3 -c \"import sqlite3;print(sqlite3.connect('/var/lib/failover/records.sqlite3').execute('select * from records').fetchall())\"; echo ----; systemctl is-enabled failover-proxy failover-replica failover-seed; stat -c '%U:%G %a %n' /var/lib/failover/*; mount | grep -E ' / | /var'; ",
            "description": "Inspect seed service and existing data"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "toolu_01HStAWcdVgSTWNWLhrUXTz1",
          "content": "# /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----\n/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start\n#!/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash\nset -e\n\ninstall -d -m 0755 /var/lib/failover\n[[ -e /var/lib/failover/upstream ]] || printf '8081\\n' > /var/lib/failover/upstream\n[[ -e /var/lib/failover/replica.role ]] || printf 'replica\\n' > /var/lib/failover/replica.role\ntouch /var/lib/failover/primary.failed\n/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python - <<'PY'\nimport sqlite3\ndb=sqlite3.connect('/var/lib/failover/records.sqlite3')\ndb.execute('CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)')\nfor record,value in [('customer-red-4a7','red-original'),('customer-blue-8d2','blue-original'),('customer-green-f31','green-original')]:\n    db.execute('INSERT OR IGNORE INTO records(id,value) VALUES(?,?)',(record,value))\ndb.commit()\nPY\n\n\n----\ncustomer-red-4a7|red-original\ncustomer-blue-8d2|blue-original\ncustomer-green-f31|green-original\n----\nenabled\nenabled\nenabled\nroot:root 644 /var/lib/failover/primary.failed\nroot:root 644 /var/lib/failover/records.sqlite3\nroot:root 644 /var/lib/failover/replica.role\nroot:root 644 /var/lib/failover/upstream\n/dev/vda on / type ext4 (rw,relatime,x-initrd.mount)\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "details": [
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "",
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              "type": "reasoning.text"
            },
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "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",
              "text": "",
              "type": "reasoning.text"
            },
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "",
              "text": "",
              "type": "reasoning.text"
            },
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "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",
              "text": "",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "toolu_01SqDWQkY3SQQUMV17vYLfrx",
          "name": "Bash",
          "input": {
            "command": "cd /var/lib/failover && python3 - <<'PY'\nimport os, http.client, sys\nD=\"/var/lib/failover\"\ndef atomic_write(name, data):\n    tmp=os.path.join(D, \".\"+name+\".tmp\"); path=os.path.join(D, name)\n    with open(tmp,\"w\") as f:\n        f.write(data); f.flush(); os.fsync(f.fileno())\n    os.chmod(tmp,0o644); os.rename(tmp,path)\n    dfd=os.open(D,os.O_DIRECTORY); os.fsync(dfd); os.close(dfd)\ndef get(port,path):\n    c=http.client.HTTPConnection(\"127.0.0.1\",port,timeout=2); c.request(\"GET\",path); r=c.getresponse(); return r.status, r.read()\n# 1. preflight: replica healthy, old primary dead\nassert get(8082,\"/health\")==(200,b\"ready\"), \"replica unhealthy\"\ntry: get(8081,\"/health\"); sys.exit(\"old primary still answering on 8081 - abort\")\nexcept (ConnectionRefusedError, OSError): pass\nassert os.path.exists(f\"{D}/primary.failed\")\n# 2. durable fence BEFORE restoring writes\natomic_write(\"primary.fenced\",\"fenced: old primary 127.0.0.1:8081 must never accept writes again\\n\")\n# 3. promote replica\natomic_write(\"replica.role\",\"primary\\n\")\nassert get(8082,\"/role\")==(200,b\"primary\")\n# 4. atomically switch proxy upstream\natomic_write(\"upstream\",\"8082\\n\")\nprint(\"failover complete\")\nPY\nsync; ls -la /var/lib/failover; cat /var/lib/failover/replica.role /var/lib/failover/upstream",
            "description": "Fence old primary, promote replica, switch proxy atomically"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "toolu_01SqDWQkY3SQQUMV17vYLfrx",
          "content": "failover complete\ntotal 32\ndrwxr-xr-x 2 root root  4096 Oct 13 00:48 .\ndrwxr-xr-x 9 root root  4096 Oct 13 00:47 ..\n-rw-r--r-- 1 root root     0 Oct 13 00:47 primary.failed\n-rw-r--r-- 1 root root    66 Oct 13 00:48 primary.fenced\n-rw-r--r-- 1 root root 12288 Oct 13 00:47 records.sqlite3\n-rw-r--r-- 1 root root     8 Oct 13 00:48 replica.role\n-rw-r--r-- 1 root root     5 Oct 13 00:48 upstream\nprimary\n8082\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "text",
          "text": "Now verifying the public API through port 8080, then restarting the services to confirm the topology survives a restart."
        },
        {
          "type": "tool_use",
          "id": "toolu_01TpivzDuxPcrwrMnhyu5VCa",
          "name": "Bash",
          "input": {
            "command": "cd /tmp; t(){ echo -n \"$1 $2 -> \"; curl -s -o /tmp/b -w '%{http_code} ' -X \"$1\" \"http://127.0.0.1:8080$2\" ${3+--data-binary \"$3\"}; cat /tmp/b; echo; }\nt GET /health; t GET /role; t GET /records/customer-red-4a7; t GET /records/customer-blue-8d2; t GET /records/customer-green-f31; t GET /records/missing\nt PUT /records/agent-check 'héllo-after-failover ✓'; t GET /records/agent-check\necho \"--- restart services ---\"; systemctl restart failover-seed failover-replica failover-proxy; sleep 1.5\nsystemctl is-active failover-seed failover-replica failover-proxy\nt GET /health; t GET /role; t GET /records/customer-red-4a7; t GET /records/agent-check\necho \"--- fencing ---\"; ls /var/lib/failover/primary.failed /var/lib/failover/primary.fenced; ss -ltn | grep -c ':8081 ' ; curl -s -o /dev/null -w 'direct 8081: %{http_code}\\n' http://127.0.0.1:8081/health\nsqlite3 /var/lib/failover/records.sqlite3 'select * from records;'",
            "description": "Verify public API, restart services, recheck"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "toolu_01TpivzDuxPcrwrMnhyu5VCa",
          "content": "GET /health -> 200 ready\nGET /role -> 200 primary\nGET /records/customer-red-4a7 -> 200 red-original\nGET /records/customer-blue-8d2 -> 200 blue-original\nGET /records/customer-green-f31 -> 200 green-original\nGET /records/missing -> 404 \nPUT /records/agent-check -> 204 \nGET /records/agent-check -> 200 héllo-after-failover ✓\n--- restart services ---\nactive\nactive\nactive\nGET /health -> 200 ready\nGET /role -> 200 primary\nGET /records/customer-red-4a7 -> 200 red-original\nGET /records/agent-check -> 200 héllo-after-failover ✓\n--- fencing ---\n/var/lib/failover/primary.failed\n/var/lib/failover/primary.fenced\n0\ndirect 8081: 000\ncustomer-red-4a7|red-original\ncustomer-blue-8d2|blue-original\ncustomer-green-f31|green-original\nagent-check|héllo-after-failover ✓\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "details": [
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "",
              "text": "",
              "type": "reasoning.text"
            },
            {
              "format": "anthropic-claude-v1",
              "index": 0,
              "signature": "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",
              "text": "",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "Failover is complete and the service is running for the referee.\n\n**What was done** (in split-brain-safe order, all state file writes via tmp + `fsync` + `rename` + directory `fsync`):\n\n1. **Preflight** – confirmed replica on 8082 was healthy and 8081 was refusing connections.\n2. **Fenced** – created `/var/lib/failover/primary.fenced` *before* enabling any writes; `primary.failed` preserved. No systemd unit exists for the old primary, so 8081 cannot come back on reboot.\n3. **Promoted** – `replica.role` → `primary` (replica re-reads it per request, no restart needed).\n4. **Switched proxy** – `upstream` → `8082` atomically via rename.\n\n**Verification through public port 8080:**\n- `/health` → `200 ready`, `/role` → `200 primary`\n- All 3 original records intact (`red/blue/green-original`), missing id → `404`\n- `PUT` → `204`, read-back exact (incl. UTF-8)\n- After `systemctl restart` of seed + replica + proxy: role/upstream/records/new write all persisted\n- 8081 not listening; `primary.failed` and `primary.fenced` both present\n\n**Reboot durability:** the seed script (`failover-seed-start`) only writes defaults when files are absent and uses `INSERT OR IGNORE`, so it won't revert `replica.role`/`upstream` or clobber records; `failover-replica` and `failover-proxy` are both `enabled` with `Restart=always`. The original SQLite file was never replaced — only appended to via the service's own commit path."
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "toolu_01XNFMP2FHTViNdZ7Q5jLneW",
      "name": "Bash",
      "input": {
        "command": "ls -la /var/lib/failover/ 2>&1; echo ---; for f in /var/lib/failover/*; do [ -f \"$f\" ] && [ \"${f##*.}\" != \"sqlite3\" ] && { echo \"== $f\"; cat \"$f\"; echo; }; done; echo ---; ss -ltnp 2>/dev/null || netstat -ltnp; echo ---; ps aux | grep -v grep | grep -iE 'failover|proxy|replica|primary|python|node' ",
        "description": "Inspect failover state dir, listeners, processes"
      },
      "output": "total 28\ndrwxr-xr-x 2 root root  4096 Oct 13 00:47 .\ndrwxr-xr-x 9 root root  4096 Oct 13 00:47 ..\n-rw-r--r-- 1 root root     0 Oct 13 00:47 primary.failed\n-rw-r--r-- 1 root root 12288 Oct 13 00:47 records.sqlite3\n-rw-r--r-- 1 root root     8 Oct 13 00:47 replica.role\n-rw-r--r-- 1 root root     5 Oct 13 00:47 upstream\n---\n== /var/lib/failover/primary.failed\n\n== /var/lib/failover/replica.role\nreplica\n\n== /var/lib/failover/upstream\n8081\n\n---\nState  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=635,fd=10))\nLISTEN 0      4096      127.0.0.54:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=300,fd=25))\nLISTEN 0      5            0.0.0.0:8080       0.0.0.0:*    users:((\"python\",pid=542,fd=3))\nLISTEN 0      4096   127.0.0.53%lo:53         0.0.0.0:*    users:((\"systemd-resolve\",pid=300,fd=23))\nLISTEN 0      128          0.0.0.0:22         0.0.0.0:*    users:((\"sshd\",pid=573,fd=6))\nLISTEN 0      5          127.0.0.1:8082       0.0.0.0:*    users:((\"python\",pid=544,fd=3))\nLISTEN 0      4096         0.0.0.0:5355       0.0.0.0:*    users:((\"systemd-resolve\",pid=300,fd=14))\nLISTEN 0      128             [::]:22            [::]:*    users:((\"sshd\",pid=573,fd=7))\nLISTEN 0      4096            [::]:5355          [::]:*    users:((\"systemd-resolve\",pid=300,fd=16))\n---\nroot         542  1.5  3.4 113184 24904 ?        Ss   00:47   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py\nroot         544  1.1  3.4  41384 25432 ?        Ss   00:47   0:00 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py\nroot         680  0.0  0.4   7980  3232 ?        Ss   00:47   0:00 bash -c chmod 0700 '/var/tmp/agents-of-empires-fable/claux' '/var/tmp/agents-of-empires-fable/strace' &&    cd /root &&    AI_GATEWAY_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-fable/claux' config init --provider vercel --model 'anthropic/claude-fable-5.1' >/dev/null &&    sed -i 's#^base_url = .*#base_url = \"http://127.0.0.1:18002/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 ($0 == section && effort != \"\") print \"reasoning_effort = \\\"\" effort \"\\\"\" }' /root/.config/claux/config.toml > /root/.config/claux/config.toml.partial &&    mv /root/.config/claux/config.toml.partial /root/.config/claux/config.toml &&    AI_GATEWAY_API_KEY=arena-proxy-placeholder '/var/tmp/agents-of-empires-fable/strace' --seccomp-bpf -f -qq -s 4096 -e trace=execve -o '/var/tmp/agents-of-empires-fable/exec.trace' '/var/tmp/agents-of-empires-fable/claux' --print \"$(cat '/var/tmp/agents-of-empires-fable/instruction.md')\" --permission-mode bypass --output-format json --transcript '/var/tmp/agents-of-empires-fable/transcript.json' > '/var/tmp/agents-of-empires-fable/result.json'\nroot         691  0.3  0.2   2772  1632 ?        S    00:47   0:00 /var/tmp/agents-of-empires-fable/strace --seccomp-bpf -f -qq -s 4096 -e trace=execve -o /var/tmp/agents-of-empires-fable/exec.trace /var/tmp/agents-of-empires-fable/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.   The referee performs host reboot testing. Do not reboot, shut down, or power off this guest yourself, or schedule those operations. Leave the deployment running for the referee to test. --permission-mode bypass --output-format json --transcript /var/tmp/agents-of-empires-fable/transcript.json\nroot         695  0.7  2.6 104020 18988 ?        Sl   00:47   0:00 /var/tmp/agents-of-empires-fable/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.   The referee performs host reboot testing. Do not reboot, shut down, or power off this guest yourself, or schedule those operations. Leave the deployment running for the referee to test. --permission-mode bypass --output-format json --transcript /var/tmp/agents-of-empires-fable/transcript.json\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 5822,
      "duration_ms": 437
    },
    {
      "id": "toolu_01BpiLGqNt8v7ZW4ioEBY17U",
      "name": "Bash",
      "input": {
        "command": "cat /nix/store/gy7xaavwyh9mbwz4ll8h6z3ban0s6g93-failover-proxy.py; echo \"==========\"; cat /nix/store/3lf8if1z3ahcv9mdxqmwncn87hnwdymi-failover-replica.py; echo \"==========\"; systemctl list-units --type=service --all 2>/dev/null | grep -iE 'failover|proxy|replica|primary'; echo ---; systemctl cat failover-proxy failover-replica failover-primary 2>&1 | head -120",
        "description": "Read service source and systemd units"
      },
      "output": "import http.client\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nUPSTREAM = \"/var/lib/failover/upstream\"\nclass Handler(BaseHTTPRequestHandler):\n    def forward(self):\n        try:\n            with open(UPSTREAM) as source: port = int(source.read().strip())\n            body = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\")))\n            connection = http.client.HTTPConnection(\"127.0.0.1\", port, timeout=2)\n            connection.request(self.command, self.path, body=body)\n            response = connection.getresponse(); data = response.read()\n            self.send_response(response.status); self.send_header(\"Content-Length\", str(len(data))); self.end_headers(); self.wfile.write(data)\n            connection.close()\n        except Exception:\n            self.send_response(502); self.send_header(\"Content-Length\", \"0\"); self.end_headers()\n    do_GET = forward\n    do_PUT = forward\n    def log_message(self, *_): pass\nThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n==========\nimport sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\nDB = \"/var/lib/failover/records.sqlite3\"\nROLE = \"/var/lib/failover/replica.role\"\ndef role():\n    with open(ROLE) as source: return source.read().strip()\ndef database():\n    connection = sqlite3.connect(DB, timeout=10)\n    connection.execute(\"CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)\")\n    return connection\nclass Handler(BaseHTTPRequestHandler):\n    def send(self, status, body=b\"\"):\n        self.send_response(status); self.send_header(\"Content-Length\", str(len(body))); self.end_headers(); self.wfile.write(body)\n    def do_GET(self):\n        if self.path == \"/health\": self.send(200, b\"ready\"); return\n        if self.path == \"/role\": self.send(200, role().encode()); return\n        if self.path.startswith(\"/records/\"):\n            connection = database(); row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone(); connection.close()\n            self.send(404 if row is None else 200, b\"\" if row is None else row[0].encode()); return\n        self.send(404)\n    def do_PUT(self):\n        if not self.path.startswith(\"/records/\"): self.send(404); return\n        if role() != \"primary\": self.send(503, b\"read-only\"); return\n        value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode(); connection = database()\n        connection.execute(\"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\", (self.path[9:], value))\n        connection.commit(); connection.close(); self.send(204)\n    def log_message(self, *_): pass\nThreadingHTTPServer((\"127.0.0.1\", 8082), Handler).serve_forever()\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---\nNo files found for failover-primary.service.\n# /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",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 13808,
      "duration_ms": 70
    },
    {
      "id": "toolu_01HStAWcdVgSTWNWLhrUXTz1",
      "name": "Bash",
      "input": {
        "command": "systemctl cat failover-seed 2>&1; echo ----; f=$(systemctl show -p ExecStart failover-seed | grep -oE '/nix/store/[^ ;]+' | head -1); echo \"$f\"; cat \"$f\" 2>/dev/null; echo ----; sqlite3 /var/lib/failover/records.sqlite3 'select * from records;' 2>/dev/null || python3 -c \"import sqlite3;print(sqlite3.connect('/var/lib/failover/records.sqlite3').execute('select * from records').fetchall())\"; echo ----; systemctl is-enabled failover-proxy failover-replica failover-seed; stat -c '%U:%G %a %n' /var/lib/failover/*; mount | grep -E ' / | /var'; ",
        "description": "Inspect seed service and existing data"
      },
      "output": "# /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----\n/nix/store/vnsdj3nml00cykxy4dmpcsgbwp76jspz-unit-script-failover-seed-start/bin/failover-seed-start\n#!/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash\nset -e\n\ninstall -d -m 0755 /var/lib/failover\n[[ -e /var/lib/failover/upstream ]] || printf '8081\\n' > /var/lib/failover/upstream\n[[ -e /var/lib/failover/replica.role ]] || printf 'replica\\n' > /var/lib/failover/replica.role\ntouch /var/lib/failover/primary.failed\n/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python - <<'PY'\nimport sqlite3\ndb=sqlite3.connect('/var/lib/failover/records.sqlite3')\ndb.execute('CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)')\nfor record,value in [('customer-red-4a7','red-original'),('customer-blue-8d2','blue-original'),('customer-green-f31','green-original')]:\n    db.execute('INSERT OR IGNORE INTO records(id,value) VALUES(?,?)',(record,value))\ndb.commit()\nPY\n\n\n----\ncustomer-red-4a7|red-original\ncustomer-blue-8d2|blue-original\ncustomer-green-f31|green-original\n----\nenabled\nenabled\nenabled\nroot:root 644 /var/lib/failover/primary.failed\nroot:root 644 /var/lib/failover/records.sqlite3\nroot:root 644 /var/lib/failover/replica.role\nroot:root 644 /var/lib/failover/upstream\n/dev/vda on / type ext4 (rw,relatime,x-initrd.mount)\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 20387,
      "duration_ms": 160
    },
    {
      "id": "toolu_01SqDWQkY3SQQUMV17vYLfrx",
      "name": "Bash",
      "input": {
        "command": "cd /var/lib/failover && python3 - <<'PY'\nimport os, http.client, sys\nD=\"/var/lib/failover\"\ndef atomic_write(name, data):\n    tmp=os.path.join(D, \".\"+name+\".tmp\"); path=os.path.join(D, name)\n    with open(tmp,\"w\") as f:\n        f.write(data); f.flush(); os.fsync(f.fileno())\n    os.chmod(tmp,0o644); os.rename(tmp,path)\n    dfd=os.open(D,os.O_DIRECTORY); os.fsync(dfd); os.close(dfd)\ndef get(port,path):\n    c=http.client.HTTPConnection(\"127.0.0.1\",port,timeout=2); c.request(\"GET\",path); r=c.getresponse(); return r.status, r.read()\n# 1. preflight: replica healthy, old primary dead\nassert get(8082,\"/health\")==(200,b\"ready\"), \"replica unhealthy\"\ntry: get(8081,\"/health\"); sys.exit(\"old primary still answering on 8081 - abort\")\nexcept (ConnectionRefusedError, OSError): pass\nassert os.path.exists(f\"{D}/primary.failed\")\n# 2. durable fence BEFORE restoring writes\natomic_write(\"primary.fenced\",\"fenced: old primary 127.0.0.1:8081 must never accept writes again\\n\")\n# 3. promote replica\natomic_write(\"replica.role\",\"primary\\n\")\nassert get(8082,\"/role\")==(200,b\"primary\")\n# 4. atomically switch proxy upstream\natomic_write(\"upstream\",\"8082\\n\")\nprint(\"failover complete\")\nPY\nsync; ls -la /var/lib/failover; cat /var/lib/failover/replica.role /var/lib/failover/upstream",
        "description": "Fence old primary, promote replica, switch proxy atomically"
      },
      "output": "failover complete\ntotal 32\ndrwxr-xr-x 2 root root  4096 Oct 13 00:48 .\ndrwxr-xr-x 9 root root  4096 Oct 13 00:47 ..\n-rw-r--r-- 1 root root     0 Oct 13 00:47 primary.failed\n-rw-r--r-- 1 root root    66 Oct 13 00:48 primary.fenced\n-rw-r--r-- 1 root root 12288 Oct 13 00:47 records.sqlite3\n-rw-r--r-- 1 root root     8 Oct 13 00:48 replica.role\n-rw-r--r-- 1 root root     5 Oct 13 00:48 upstream\nprimary\n8082\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 35879,
      "duration_ms": 195
    },
    {
      "id": "toolu_01TpivzDuxPcrwrMnhyu5VCa",
      "name": "Bash",
      "input": {
        "command": "cd /tmp; t(){ echo -n \"$1 $2 -> \"; curl -s -o /tmp/b -w '%{http_code} ' -X \"$1\" \"http://127.0.0.1:8080$2\" ${3+--data-binary \"$3\"}; cat /tmp/b; echo; }\nt GET /health; t GET /role; t GET /records/customer-red-4a7; t GET /records/customer-blue-8d2; t GET /records/customer-green-f31; t GET /records/missing\nt PUT /records/agent-check 'héllo-after-failover ✓'; t GET /records/agent-check\necho \"--- restart services ---\"; systemctl restart failover-seed failover-replica failover-proxy; sleep 1.5\nsystemctl is-active failover-seed failover-replica failover-proxy\nt GET /health; t GET /role; t GET /records/customer-red-4a7; t GET /records/agent-check\necho \"--- fencing ---\"; ls /var/lib/failover/primary.failed /var/lib/failover/primary.fenced; ss -ltn | grep -c ':8081 ' ; curl -s -o /dev/null -w 'direct 8081: %{http_code}\\n' http://127.0.0.1:8081/health\nsqlite3 /var/lib/failover/records.sqlite3 'select * from records;'",
        "description": "Verify public API, restart services, recheck"
      },
      "output": "GET /health -> 200 ready\nGET /role -> 200 primary\nGET /records/customer-red-4a7 -> 200 red-original\nGET /records/customer-blue-8d2 -> 200 blue-original\nGET /records/customer-green-f31 -> 200 green-original\nGET /records/missing -> 404 \nPUT /records/agent-check -> 204 \nGET /records/agent-check -> 200 héllo-after-failover ✓\n--- restart services ---\nactive\nactive\nactive\nGET /health -> 200 ready\nGET /role -> 200 primary\nGET /records/customer-red-4a7 -> 200 red-original\nGET /records/agent-check -> 200 héllo-after-failover ✓\n--- fencing ---\n/var/lib/failover/primary.failed\n/var/lib/failover/primary.fenced\n0\ndirect 8081: 000\ncustomer-red-4a7|red-original\ncustomer-blue-8d2|blue-original\ncustomer-green-f31|green-original\nagent-check|héllo-after-failover ✓\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 45831,
      "duration_ms": 2162
    }
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    "total_duration_ms": 58625,
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