{
  "schema_version": 2,
  "model": "deepseek/deepseek-v4.1-flash",
  "outcome": {
    "status": "error",
    "message": "openrouter API error (429 Too Many Requests) for model 'deepseek/deepseek-v4.1-flash': Provider returned error. Retry later or choose another model/provider",
    "failure": {
      "kind": "rate_limited",
      "retryable": true,
      "http_status": 429,
      "attempts": 4
    }
  },
  "usage": {
    "input_tokens": 18417,
    "output_tokens": 3069,
    "cache_read_tokens": 9600,
    "cache_creation_tokens": 0,
    "cost_usd": 0.0092655
  },
  "messages": [
    {
      "role": "user",
      "content": "Roll the live stateful service from v1 to v2 using the contract appended below. Preserve every request and existing record during cutover. Speed matters, but any externally visible outage disqualifies the rollout.\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# Zero-downtime rollout contract\n\nA stateful v1 record service is live on the public endpoint at port 8080. It is\nserved by `rollout-v1.service` on port 8081 through the stable\n`rollout-proxy.service`. Existing records in\n`/var/lib/rollout/records.sqlite3` are customer state and must be preserved.\n\nDeploy v2 using the dormant `rollout-v2.service` slot. It runs\n`/opt/rollout/v2.py` and must listen on `127.0.0.1:8082`. v2 implements:\n\n- `GET /health`: `200` with the exact body `ready`;\n- `GET /version`: `200` with the exact body `v2`;\n- `PUT /records/<id>`: store the UTF-8 request body and return `204`;\n- `GET /records/<id>`: return the exact stored body, or `404` when absent.\n\nThe public proxy reads its upstream port from `/var/lib/rollout/upstream` for\nevery request. It initially contains `8081`. Switch it atomically to `8082`\nonly after v2 is ready. The public endpoint is monitored throughout the rollout.\nAny failed health, version, or existing-record request makes the rollout\nineligible to win, even if the service later recovers.\n\nDo not stop or restart `rollout-proxy.service` or `rollout-v1.service` during\ncutover. After switching traffic, leave v2 and the proxy enabled and healthy.\nThe v2 deployment and all records must survive a v2 service restart and a full\nhost reboot without agent help."
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Let me start by exploring the environment to understand the current state.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Let me start by exploring the environment to understand the current state.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "I'll start by exploring the current state of the system."
        },
        {
          "type": "tool_use",
          "id": "call_00_xxqsIAJaya0bWnywXcu55625",
          "name": "Bash",
          "input": {
            "command": "ls -la /opt/rollout/ /var/lib/rollout/ 2>&1; echo \"---SERVICES---\"; systemctl status rollout-v1.service rollout-v2.service rollout-proxy.service --no-pager 2>&1",
            "description": "Inspect rollout directories and service status"
          }
        },
        {
          "type": "tool_use",
          "id": "call_01_OjYTX6J7Gx1BagJlb8sn9519",
          "name": "Bash",
          "input": {
            "command": "echo \"=== v1 unit ===\"; cat /etc/systemd/system/rollout-v1.service 2>&1; echo \"=== v2 unit ===\"; cat /etc/systemd/system/rollout-v2.service 2>&1; echo \"=== proxy unit ===\"; cat /etc/systemd/system/rollout-proxy.service 2>&1",
            "description": "Read systemd unit files"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_00_xxqsIAJaya0bWnywXcu55625",
          "content": "/opt/rollout/:\ntotal 8\ndrwxr-xr-x 2 root root 4096 Sep 10 15:42 .\ndrwxr-xr-x 3 root root 4096 Sep 10 15:42 ..\n\n/var/lib/rollout/:\ntotal 24\ndrwxr-xr-x 2 root root  4096 Sep 10 15:42 .\ndrwxr-xr-x 9 root root  4096 Sep 10 15:42 ..\n-rw-r--r-- 1 root root 12288 Sep 10 15:42 records.sqlite3\n-rw-r--r-- 1 root root     5 Sep 10 15:42 upstream\n---SERVICES---\n● rollout-v1.service - Existing rollout v1 service\n     Loaded: loaded (/etc/systemd/system/rollout-v1.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-09-10 15:42:34 UTC; 8s ago\n Invocation: a483ef311f1f417d9d97a2eadc4ebfac\n   Main PID: 555 (python)\n         IP: 232K in, 223.1K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 18M (peak: 18.1M)\n        CPU: 517ms\n     CGroup: /system.slice/rollout-v1.service\n             └─555 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nSep 10 15:42:34 rollout-three systemd[1]: Started Existing rollout v1 service.\n\n× rollout-v2.service - Agent-built rollout v2 slot\n     Loaded: loaded (/etc/systemd/system/rollout-v2.service; enabled; preset: ignored)\n     Active: failed (Result: start-limit-hit) since Thu 2026-09-10 15:42:41 UTC; 2s ago\n   Duration: 116ms\n Invocation: 124748f9217048ce8a28bafc6f566611\n    Process: 1119 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n   Main PID: 1119 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.1M\n        CPU: 53ms\n\nSep 10 15:42:41 rollout-three systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nSep 10 15:42:41 rollout-three systemd[1]: rollout-v2.service: Start request repeated too quickly.\nSep 10 15:42:41 rollout-three systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nSep 10 15:42:41 rollout-three systemd[1]: Failed to start Agent-built rollout v2 slot.\n\n● rollout-proxy.service - Stable public rollout proxy\n     Loaded: loaded (/etc/systemd/system/rollout-proxy.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-09-10 15:42:34 UTC; 8s ago\n Invocation: f66f5312d40e4a0b9a7977f93ca6b07b\n   Main PID: 557 (python)\n         IP: 384.6K in, 384.6K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 15.8M (peak: 15.9M)\n        CPU: 710ms\n     CGroup: /system.slice/rollout-proxy.service\n             └─557 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nSep 10 15:42:34 rollout-three systemd[1]: Started Stable public rollout proxy.\n\nExit code: exit status: 3",
          "is_error": true
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_01_OjYTX6J7Gx1BagJlb8sn9519",
          "content": "=== v1 unit ===\n[Unit]\nAfter=rollout-seed.service\nDescription=Existing rollout v1 service\nRequires=rollout-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/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n=== v2 unit ===\n[Unit]\nAfter=rollout-seed.service\nDescription=Agent-built rollout v2 slot\nRequires=rollout-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n=== proxy unit ===\n[Unit]\nAfter=rollout-seed.service rollout-v1.service\nDescription=Stable public rollout proxy\nRequires=rollout-seed.service rollout-v1.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/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Let me look at the proxy source, the v1 source, and understand how things work. Also let me check the seed service and the existing records.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Let me look at the proxy source, the v1 source, and understand how things work. Also let me check the seed service and the existing records.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "Let me examine the proxy and v1 implementations to understand the exact behavior."
        },
        {
          "type": "tool_use",
          "id": "call_00_iqIdni361OdAJUKvGJaQ6635",
          "name": "Bash",
          "input": {
            "command": "echo \"=== PROXY SOURCE ===\"; cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py; echo; echo \"=== V1 SOURCE ===\"; cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py",
            "description": "Read proxy and v1 source"
          }
        },
        {
          "type": "tool_use",
          "id": "call_01_BkYmM7mAlUMyYVGbVe928517",
          "name": "Bash",
          "input": {
            "command": "echo \"=== upstream ===\"; cat /var/lib/rollout/upstream; echo; echo \"=== seed service ===\"; cat /etc/systemd/system/rollout-seed.service 2>&1; echo \"=== records schema ===\"; sqlite3 /var/lib/rollout/records.sqlite3 \".schema\" 2>&1; echo \"=== records ===\"; sqlite3 /var/lib/rollout/records.sqlite3 \"SELECT * FROM records;\" 2>&1",
            "description": "Check upstream file, seed service, and records db"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_00_iqIdni361OdAJUKvGJaQ6635",
          "content": "=== PROXY SOURCE ===\nimport http.client\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nUPSTREAM = \"/var/lib/rollout/upstream\"\n\nclass Handler(BaseHTTPRequestHandler):\n    def forward(self):\n        try:\n            with open(UPSTREAM) as source:\n                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()\n            response_body = response.read()\n            self.send_response(response.status)\n            self.send_header(\"Content-Length\", str(len(response_body)))\n            self.end_headers()\n            self.wfile.write(response_body)\n            connection.close()\n        except Exception:\n            self.send_response(502)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n\n    do_GET = forward\n    do_PUT = forward\n\n    def log_message(self, *_):\n        pass\n\nThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n\n=== V1 SOURCE ===\nimport sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDB = \"/var/lib/rollout/records.sqlite3\"\n\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\n\nclass Handler(BaseHTTPRequestHandler):\n    def send(self, status, body=b\"\"):\n        self.send_response(status)\n        self.send_header(\"Content-Length\", str(len(body)))\n        self.end_headers()\n        self.wfile.write(body)\n\n    def do_GET(self):\n        if self.path == \"/health\":\n            self.send(200, b\"ready\")\n            return\n        if self.path == \"/version\":\n            self.send(200, b\"v1\")\n            return\n        if self.path.startswith(\"/records/\"):\n            connection = database()\n            row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone()\n            connection.close()\n            if row is None:\n                self.send(404)\n            else:\n                self.send(200, row[0].encode())\n            return\n        self.send(404)\n\n    def do_PUT(self):\n        if not self.path.startswith(\"/records/\"):\n            self.send(404)\n            return\n        value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode()\n        connection = database()\n        connection.execute(\n            \"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\",\n            (self.path[9:], value),\n        )\n        connection.commit()\n        connection.close()\n        self.send(204)\n\n    def log_message(self, *_):\n        pass\n\nThreadingHTTPServer((\"127.0.0.1\", 8081), Handler).serve_forever()\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_01_BkYmM7mAlUMyYVGbVe928517",
          "content": "=== upstream ===\n8081\n\n=== seed service ===\n[Unit]\nBefore=rollout-v1.service rollout-v2.service rollout-proxy.service\nDescription=Seed live v1 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/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start/bin/rollout-seed-start \nRemainAfterExit=true\nType=oneshot\n\n[Install]\nWantedBy=multi-user.target\n=== records schema ===\nCREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL);\n=== records ===\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Now I understand the setup. Let me plan:\n\n1. Write `/opt/rollout/v2.py` implementing the contract:\n   - `GET /health`: 200 body `ready`\n   - `GET /version`: 200 body `v2`\n   - `PUT /records/<id>`: store UTF-8 body, return 204\n   - `GET /records/<id>`: return exact stored body, 404 absent\n   - Listen on 127.0.0.1:8082\n   - Must use the same sqlite db `/var/lib/rollout/records.sqlite3` to preserve records\n   \n2. Fix v2 service - it's currently in start-limit-hit. Need to reset-failed.\n\n3. Start v2, verify health/version/records.\n\n4. Atomically switch `/var/lib/rollout/upstream` from 8081 to 8082. Atomic = write to temp file and `mv` (rename is atomic on same filesystem).\n\n5. Verify through the public endpoint port 8080 that version is v2, health ready, existing records preserved.\n\n6. Ensure persistence: v2 enabled, proxy enabled. Survive v2 restart and reboot. The upstream file must persist (it's in /var/lib/rollout). Since we write it, it persists on disk. v2 service enabled. Good.\n\nWait - important: the seed service is a oneshot that runs before v1/v2/proxy on boot. Does it reset upstream to 8081? Let me check what rollout-seed-start does. If it resets upstream to 8081 on boot, then after reboot the proxy would point to v1 again. But the contract says \"After switching traffic, leave v2 and the proxy enabled and healthy\" and \"all records must survive restart and reboot\". Hmm, but does the referee check that after reboot the public endpoint serves v2? Let me re-read.\n\n\"The v2 deployment and all records must survive a v2 service restart and a full host reboot without agent help.\"\n\nThis implies v2 must come up on its own after reboot. But if the seed service resets upstream to 8081, then the proxy would route to v1 after reboot. Hmm. Let me inspect the seed script. It's a nix store path. Let me read it.\n\nAlso, careful: the seed service might recreate/reset the database, which would wipe records! Let me check. Actually it's \"Seed live v1 state\" - it probably creates the two initial records. If it runs on every boot with INSERT OR REPLACE, it might overwrite customer records. But that's existing behavior. Let me look.\n\nLet me read the seed script.\n\nAlso note: the v2 unit has `Requires=rollout-seed.service` and `After=rollout-seed.service`. Good, same as v1.\n\nLet me inspect the seed script and boot configuration.\n\nActually, key concern: does the referee restart the host and check? \"must survive a full host reboot without agent help\". The seed service runs on boot. If it resets upstream to 8081, then v2 wouldn't serve. So maybe the seed only seeds the DB and not upstream. Let me read.\n\nLet me also check whether there's a way to make our v2 point survive. Let me read the seed script content.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Now I understand the setup. Let me plan:\n\n1. Write `/opt/rollout/v2.py` implementing the contract:\n   - `GET /health`: 200 body `ready`\n   - `GET /version`: 200 body `v2`\n   - `PUT /records/<id>`: store UTF-8 body, return 204\n   - `GET /records/<id>`: return exact stored body, 404 absent\n   - Listen on 127.0.0.1:8082\n   - Must use the same sqlite db `/var/lib/rollout/records.sqlite3` to preserve records\n   \n2. Fix v2 service - it's currently in start-limit-hit. Need to reset-failed.\n\n3. Start v2, verify health/version/records.\n\n4. Atomically switch `/var/lib/rollout/upstream` from 8081 to 8082. Atomic = write to temp file and `mv` (rename is atomic on same filesystem).\n\n5. Verify through the public endpoint port 8080 that version is v2, health ready, existing records preserved.\n\n6. Ensure persistence: v2 enabled, proxy enabled. Survive v2 restart and reboot. The upstream file must persist (it's in /var/lib/rollout). Since we write it, it persists on disk. v2 service enabled. Good.\n\nWait - important: the seed service is a oneshot that runs before v1/v2/proxy on boot. Does it reset upstream to 8081? Let me check what rollout-seed-start does. If it resets upstream to 8081 on boot, then after reboot the proxy would point to v1 again. But the contract says \"After switching traffic, leave v2 and the proxy enabled and healthy\" and \"all records must survive restart and reboot\". Hmm, but does the referee check that after reboot the public endpoint serves v2? Let me re-read.\n\n\"The v2 deployment and all records must survive a v2 service restart and a full host reboot without agent help.\"\n\nThis implies v2 must come up on its own after reboot. But if the seed service resets upstream to 8081, then the proxy would route to v1 after reboot. Hmm. Let me inspect the seed script. It's a nix store path. Let me read it.\n\nAlso, careful: the seed service might recreate/reset the database, which would wipe records! Let me check. Actually it's \"Seed live v1 state\" - it probably creates the two initial records. If it runs on every boot with INSERT OR REPLACE, it might overwrite customer records. But that's existing behavior. Let me look.\n\nLet me read the seed script.\n\nAlso note: the v2 unit has `Requires=rollout-seed.service` and `After=rollout-seed.service`. Good, same as v1.\n\nLet me inspect the seed script and boot configuration.\n\nActually, key concern: does the referee restart the host and check? \"must survive a full host reboot without agent help\". The seed service runs on boot. If it resets upstream to 8081, then v2 wouldn't serve. So maybe the seed only seeds the DB and not upstream. Let me read.\n\nLet me also check whether there's a way to make our v2 point survive. Let me read the seed script content.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "Now let me inspect the seed script (runs on boot) and check what it does to state."
        },
        {
          "type": "tool_use",
          "id": "call_00_zchSGlSDBl43o5olEet34280",
          "name": "Bash",
          "input": {
            "command": "cat /nix/store/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start/bin/rollout-seed-start 2>&1",
            "description": "Read seed script"
          }
        },
        {
          "type": "tool_use",
          "id": "call_01_uiaU5Fm1C1B0J54G4NHc8290",
          "name": "Bash",
          "input": {
            "command": "echo \"=== all rollout units ===\"; ls -la /etc/systemd/system/ | grep -i rollout; echo \"=== is-enabled ===\"; systemctl is-enabled rollout-v1.service rollout-v2.service rollout-proxy.service rollout-seed.service 2>&1; echo \"=== listening ports ===\"; ss -tlnp 2>/dev/null | grep -E '8080|8081|8082' || netstat -tlnp 2>/dev/null | grep -E '8080|8081|8082'",
            "description": "List rollout units and listening ports"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_00_zchSGlSDBl43o5olEet34280",
          "content": "#!/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash\nset -e\n\ninstall -d -m 0755 /var/lib/rollout /opt/rollout\nif [[ ! -e /var/lib/rollout/upstream ]]; then\n  printf '8081\\n' > /var/lib/rollout/upstream\nfi\n/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python - <<'PY'\nimport sqlite3\ndb = sqlite3.connect('/var/lib/rollout/records.sqlite3')\ndb.execute('CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)')\nfor record, value in [('customer-alpha-73c', 'alpha-original'), ('customer-beta-a19', 'beta-original')]:\n    db.execute('INSERT OR IGNORE INTO records(id,value) VALUES(?,?)', (record,value))\ndb.commit()\nPY\n\n\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_01_uiaU5Fm1C1B0J54G4NHc8290",
          "content": "=== all rollout units ===\nlrwxrwxrwx  1 root root      92 Jan  1  1970 rollout-proxy.service -> /nix/store/zs0l8ds3rl62nabiwjfgz8bykpp6z6kn-unit-rollout-proxy.service/rollout-proxy.service\nlrwxrwxrwx  1 root root      90 Jan  1  1970 rollout-seed.service -> /nix/store/0ky46lp0ljmkfv9y4sc1w4n2vfkydj8v-unit-rollout-seed.service/rollout-seed.service\nlrwxrwxrwx  1 root root      86 Jan  1  1970 rollout-v1.service -> /nix/store/rcrgmhnjq004n1y7kzpbn6mp5mxfqblh-unit-rollout-v1.service/rollout-v1.service\nlrwxrwxrwx  1 root root      86 Jan  1  1970 rollout-v2.service -> /nix/store/pq9m5zxhsw22kmv4s8nbx7y16ac9pghj-unit-rollout-v2.service/rollout-v2.service\n=== is-enabled ===\nenabled\nenabled\nenabled\nenabled\n=== listening ports ===\nLISTEN 0      5          127.0.0.1:8081       0.0.0.0:*    users:((\"python\",pid=555,fd=3))\nLISTEN 0      5            0.0.0.0:8080       0.0.0.0:*    users:((\"python\",pid=557,fd=3))\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "The seed script only writes upstream if it doesn't exist, and uses INSERT OR IGNORE (doesn't overwrite existing records). So persistence is fine — after reboot, upstream remains 8082 and records preserved.\n\nNow let me plan the v2 implementation. Key contract points:\n\n- `PUT /records/<id>`: store the UTF-8 request body and return 204. v1 uses `.decode()` which fails on invalid UTF-8; contract says UTF-8 body so fine.\n- `GET /records/<id>`: return exact stored body, 404 absent.\n- Must use same DB `/var/lib/rollout/records.sqlite3`.\n\nImportant detail: v1 stores value as TEXT (str) and returns `row[0].encode()`. For exactness, v2 could store bytes as BLOB to be exact. But existing records are TEXT. To preserve compat, decode/encode UTF-8 works since it's UTF-8. I'll store as text using decode, matching v1. Actually to be careful about \"exact stored body\", UTF-8 decode then encode is identity for valid UTF-8. Fine.\n\nBut there's a concurrency consideration: v2 must handle PUT while v1 still running? Both use SQLite same file. SQLite handles locking with timeout. I'll set timeout=10 like v1.\n\nLet me think about the atomic switch. Write `8082\\n` to a temp file in same dir and `mv -f` to upstream. `os.rename` is atomic. Better: use a small python one-liner or `printf > tmp && mv`. Since the proxy reads per-request, atomic rename ensures no reader sees partial content. Actually the file is tiny (5 bytes), a truncate-write could theoretically be read mid-write. Use rename.\n\nAlso I should consider: the referee monitors throughout. So I must not cause any failed request. Steps must be safe.\n\nPotential issue: when I start v2, the v2 service is in failed state (start-limit-hit). I need `systemctl reset-failed rollout-v2.service` then `systemctl start`. That's not stopping proxy or v1.\n\nLet me also make sure v2 binds to 8082 and doesn't conflict. Currently only 8080 and 8081 listening.\n\nAlso \"leave v2 and the proxy enabled and healthy\" - both already enabled.\n\nLet me now write v2.py. Let me match style of v1.\n\nOne thing: v1 `PUT` returns 204 with `send(204)` which sends Content-Length: 0. Fine. For v2, same.\n\nFor the handler, `self.path` may include query string, but not required. Keep simple like v1.\n\nLet me write it.\n\nAlso, should v2 handle the `/records/<id>` where id contains slashes? self.path[9:] takes everything after \"/records/\". Same as v1.\n\nNow, about robustness: The service must survive restart — systemd Restart=always handles it, and DB persists on disk.\n\nLet me consider a subtle issue: when traffic switches to v2, writes go to v2 (same DB), reads too. v1 keeps running but gets no traffic. Good.\n\nLet me also think about whether the referee expects the public health to return \"ready\" (v2's /health) after cutover. The contract: public endpoint monitored; any failed health/version/existing-record request makes ineligible. Before cutover, proxy points to v1 which returns health \"ready\" and version \"v1\". The version check presumably expects \"v2\" only after cutover. Either way, v2's health must be \"ready\".\n\nNow implement. Write /opt/rollout/v2.py.\n\nLet me also verify the exact PIDs and that v2 fails currently because /opt/rollout/v2.py doesn't exist. Right, /opt/rollout is empty.\n\nLet me write the file.\n\nAfter writing, I'll:\n1. `systemctl reset-failed rollout-v2.service`\n2. `systemctl start rollout-v2.service`\n3. wait and check status\n4. curl 127.0.0.1:8082/health, /version, /records/customer-alpha-73c\n5. Then switch upstream atomically.\n6. Verify through 8080: health, version, existing records, and a PUT+GET roundtrip.\n\nBefore switching, also confirm v1 still serving via 8080 (baseline).\n\nLet me also think about whether I should do a test PUT to v2 before switch — that writes a new record to shared DB, which is fine (adds record). But maybe I shouldn't pollute. I can test PUT/GET on a temp id then delete it. But deleting requires DB. I can just test with an id and then remove via sqlite. Actually simpler: test PUT/GET with a probe id, then delete it to leave clean state. Good for verifying.\n\nLet me write v2.py now. I'll be careful with Content-Length reading.\n\nLet me write the code.\n\nAlso consider: The proxy forwards with `self.rfile.read(int(Content-Length))` and creates HTTPConnection. It doesn't forward headers other than body. So v2's reading of Content-Length is fine.\n\nLet me write.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "The seed script only writes upstream if it doesn't exist, and uses INSERT OR IGNORE (doesn't overwrite existing records). So persistence is fine — after reboot, upstream remains 8082 and records preserved.\n\nNow let me plan the v2 implementation. Key contract points:\n\n- `PUT /records/<id>`: store the UTF-8 request body and return 204. v1 uses `.decode()` which fails on invalid UTF-8; contract says UTF-8 body so fine.\n- `GET /records/<id>`: return exact stored body, 404 absent.\n- Must use same DB `/var/lib/rollout/records.sqlite3`.\n\nImportant detail: v1 stores value as TEXT (str) and returns `row[0].encode()`. For exactness, v2 could store bytes as BLOB to be exact. But existing records are TEXT. To preserve compat, decode/encode UTF-8 works since it's UTF-8. I'll store as text using decode, matching v1. Actually to be careful about \"exact stored body\", UTF-8 decode then encode is identity for valid UTF-8. Fine.\n\nBut there's a concurrency consideration: v2 must handle PUT while v1 still running? Both use SQLite same file. SQLite handles locking with timeout. I'll set timeout=10 like v1.\n\nLet me think about the atomic switch. Write `8082\\n` to a temp file in same dir and `mv -f` to upstream. `os.rename` is atomic. Better: use a small python one-liner or `printf > tmp && mv`. Since the proxy reads per-request, atomic rename ensures no reader sees partial content. Actually the file is tiny (5 bytes), a truncate-write could theoretically be read mid-write. Use rename.\n\nAlso I should consider: the referee monitors throughout. So I must not cause any failed request. Steps must be safe.\n\nPotential issue: when I start v2, the v2 service is in failed state (start-limit-hit). I need `systemctl reset-failed rollout-v2.service` then `systemctl start`. That's not stopping proxy or v1.\n\nLet me also make sure v2 binds to 8082 and doesn't conflict. Currently only 8080 and 8081 listening.\n\nAlso \"leave v2 and the proxy enabled and healthy\" - both already enabled.\n\nLet me now write v2.py. Let me match style of v1.\n\nOne thing: v1 `PUT` returns 204 with `send(204)` which sends Content-Length: 0. Fine. For v2, same.\n\nFor the handler, `self.path` may include query string, but not required. Keep simple like v1.\n\nLet me write it.\n\nAlso, should v2 handle the `/records/<id>` where id contains slashes? self.path[9:] takes everything after \"/records/\". Same as v1.\n\nNow, about robustness: The service must survive restart — systemd Restart=always handles it, and DB persists on disk.\n\nLet me consider a subtle issue: when traffic switches to v2, writes go to v2 (same DB), reads too. v1 keeps running but gets no traffic. Good.\n\nLet me also think about whether the referee expects the public health to return \"ready\" (v2's /health) after cutover. The contract: public endpoint monitored; any failed health/version/existing-record request makes ineligible. Before cutover, proxy points to v1 which returns health \"ready\" and version \"v1\". The version check presumably expects \"v2\" only after cutover. Either way, v2's health must be \"ready\".\n\nNow implement. Write /opt/rollout/v2.py.\n\nLet me also verify the exact PIDs and that v2 fails currently because /opt/rollout/v2.py doesn't exist. Right, /opt/rollout is empty.\n\nLet me write the file.\n\nAfter writing, I'll:\n1. `systemctl reset-failed rollout-v2.service`\n2. `systemctl start rollout-v2.service`\n3. wait and check status\n4. curl 127.0.0.1:8082/health, /version, /records/customer-alpha-73c\n5. Then switch upstream atomically.\n6. Verify through 8080: health, version, existing records, and a PUT+GET roundtrip.\n\nBefore switching, also confirm v1 still serving via 8080 (baseline).\n\nLet me also think about whether I should do a test PUT to v2 before switch — that writes a new record to shared DB, which is fine (adds record). But maybe I shouldn't pollute. I can test PUT/GET on a temp id then delete it. But deleting requires DB. I can just test with an id and then remove via sqlite. Actually simpler: test PUT/GET with a probe id, then delete it to leave clean state. Good for verifying.\n\nLet me write v2.py now. I'll be careful with Content-Length reading.\n\nLet me write the code.\n\nAlso consider: The proxy forwards with `self.rfile.read(int(Content-Length))` and creates HTTPConnection. It doesn't forward headers other than body. So v2's reading of Content-Length is fine.\n\nLet me write.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "Now I understand the full picture. Key facts:\n- Seed script only writes `upstream` if absent, and uses `INSERT OR IGNORE`, so records and upstream choice persist across reboot.\n- v2 needs to be written to `/opt/rollout/v2.py`, listening on `127.0.0.1:8082`, using the same SQLite DB.\n\nLet me set up a todo list and write v2."
        },
        {
          "type": "tool_use",
          "id": "call_00_BJrGMsB6b6ivP8XOWUqm8897",
          "name": "TodoWrite",
          "input": {
            "todos": [
              {
                "activeForm": "Writing v2 service implementation",
                "content": "Write /opt/rollout/v2.py implementing the contract on 127.0.0.1:8082",
                "status": "in_progress"
              },
              {
                "activeForm": "Starting v2 service",
                "content": "Reset v2 failed state and start rollout-v2.service",
                "status": "pending"
              },
              {
                "activeForm": "Verifying v2 on 8082",
                "content": "Verify v2 directly on 8082 (health, version, existing records, PUT/GET)",
                "status": "pending"
              },
              {
                "activeForm": "Switching upstream atomically",
                "content": "Atomically switch /var/lib/rollout/upstream to 8082",
                "status": "pending"
              },
              {
                "activeForm": "Verifying public endpoint",
                "content": "Verify public endpoint 8080 serves v2 and preserves records",
                "status": "pending"
              },
              {
                "activeForm": "Confirming persistence",
                "content": "Confirm persistence across v2 restart and reboot (enabled + on-disk state)",
                "status": "pending"
              }
            ]
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_00_BJrGMsB6b6ivP8XOWUqm8897",
          "content": "Added:\n  + Write /opt/rollout/v2.py implementing the contract on 127.0.0.1:8082\n  + Reset v2 failed state and start rollout-v2.service\n  + Verify v2 directly on 8082 (health, version, existing records, PUT/GET)\n  + Atomically switch /var/lib/rollout/upstream to 8082\n  + Verify public endpoint 8080 serves v2 and preserves records\n  + Confirm persistence across v2 restart and reboot (enabled + on-disk state)\n\nCurrent tasks:\n  ◉ Write /opt/rollout/v2.py implementing the contract on 127.0.0.1:8082\n  ○ Reset v2 failed state and start rollout-v2.service\n  ○ Verify v2 directly on 8082 (health, version, existing records, PUT/GET)\n  ○ Atomically switch /var/lib/rollout/upstream to 8082\n  ○ Verify public endpoint 8080 serves v2 and preserves records\n  ○ Confirm persistence across v2 restart and reboot (enabled + on-disk state)\n"
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "call_00_xxqsIAJaya0bWnywXcu55625",
      "name": "Bash",
      "input": {
        "command": "ls -la /opt/rollout/ /var/lib/rollout/ 2>&1; echo \"---SERVICES---\"; systemctl status rollout-v1.service rollout-v2.service rollout-proxy.service --no-pager 2>&1",
        "description": "Inspect rollout directories and service status"
      },
      "output": "/opt/rollout/:\ntotal 8\ndrwxr-xr-x 2 root root 4096 Sep 10 15:42 .\ndrwxr-xr-x 3 root root 4096 Sep 10 15:42 ..\n\n/var/lib/rollout/:\ntotal 24\ndrwxr-xr-x 2 root root  4096 Sep 10 15:42 .\ndrwxr-xr-x 9 root root  4096 Sep 10 15:42 ..\n-rw-r--r-- 1 root root 12288 Sep 10 15:42 records.sqlite3\n-rw-r--r-- 1 root root     5 Sep 10 15:42 upstream\n---SERVICES---\n● rollout-v1.service - Existing rollout v1 service\n     Loaded: loaded (/etc/systemd/system/rollout-v1.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-09-10 15:42:34 UTC; 8s ago\n Invocation: a483ef311f1f417d9d97a2eadc4ebfac\n   Main PID: 555 (python)\n         IP: 232K in, 223.1K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 18M (peak: 18.1M)\n        CPU: 517ms\n     CGroup: /system.slice/rollout-v1.service\n             └─555 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nSep 10 15:42:34 rollout-three systemd[1]: Started Existing rollout v1 service.\n\n× rollout-v2.service - Agent-built rollout v2 slot\n     Loaded: loaded (/etc/systemd/system/rollout-v2.service; enabled; preset: ignored)\n     Active: failed (Result: start-limit-hit) since Thu 2026-09-10 15:42:41 UTC; 2s ago\n   Duration: 116ms\n Invocation: 124748f9217048ce8a28bafc6f566611\n    Process: 1119 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n   Main PID: 1119 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.1M\n        CPU: 53ms\n\nSep 10 15:42:41 rollout-three systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nSep 10 15:42:41 rollout-three systemd[1]: rollout-v2.service: Start request repeated too quickly.\nSep 10 15:42:41 rollout-three systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nSep 10 15:42:41 rollout-three systemd[1]: Failed to start Agent-built rollout v2 slot.\n\n● rollout-proxy.service - Stable public rollout proxy\n     Loaded: loaded (/etc/systemd/system/rollout-proxy.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-09-10 15:42:34 UTC; 8s ago\n Invocation: f66f5312d40e4a0b9a7977f93ca6b07b\n   Main PID: 557 (python)\n         IP: 384.6K in, 384.6K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 15.8M (peak: 15.9M)\n        CPU: 710ms\n     CGroup: /system.slice/rollout-proxy.service\n             └─557 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nSep 10 15:42:34 rollout-three systemd[1]: Started Stable public rollout proxy.\n\nExit code: exit status: 3",
      "is_error": true,
      "read_only": false,
      "started_after_ms": 1584,
      "duration_ms": 103
    },
    {
      "id": "call_01_OjYTX6J7Gx1BagJlb8sn9519",
      "name": "Bash",
      "input": {
        "command": "echo \"=== v1 unit ===\"; cat /etc/systemd/system/rollout-v1.service 2>&1; echo \"=== v2 unit ===\"; cat /etc/systemd/system/rollout-v2.service 2>&1; echo \"=== proxy unit ===\"; cat /etc/systemd/system/rollout-proxy.service 2>&1",
        "description": "Read systemd unit files"
      },
      "output": "=== v1 unit ===\n[Unit]\nAfter=rollout-seed.service\nDescription=Existing rollout v1 service\nRequires=rollout-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/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n=== v2 unit ===\n[Unit]\nAfter=rollout-seed.service\nDescription=Agent-built rollout v2 slot\nRequires=rollout-seed.service\n\n[Service]\nEnvironment=\"LOCALE_ARCHIVE=/nix/store/c59mcax29xrwyfdqs308wkmn2srnmzkn-glibc-locales-2.42-67/lib/locale/locale-archive\"\nEnvironment=\"PATH=/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/bin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/bin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/bin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/bin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/bin:/nix/store/97d5ygrvqj55f4nx1x34wfdcc7qn11c0-coreutils-9.11/sbin:/nix/store/ibg16grw5is7i7ilnflc5xmj6fwksqkl-findutils-4.11.0/sbin:/nix/store/4dgym2zhac9vy0vrih4gsplh0wpfl13m-gnugrep-3.12/sbin:/nix/store/rxd8p6g4k4s0sx4q1szmzvp9rsmhmfys-gnused-4.10/sbin:/nix/store/mc901k2s1n3v1disrj0356l7lwz7l6vg-systemd-261.1/sbin\"\nEnvironment=\"TZDIR=/nix/store/vlgjd2179ahfh509p1aid8fl22bw8ri3-tzdata-2026c/share/zoneinfo\"\nExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n=== proxy unit ===\n[Unit]\nAfter=rollout-seed.service rollout-v1.service\nDescription=Stable public rollout proxy\nRequires=rollout-seed.service rollout-v1.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/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\nRestart=always\nRestartSec=1\n\n[Install]\nWantedBy=multi-user.target\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 1687,
      "duration_ms": 58
    },
    {
      "id": "call_00_iqIdni361OdAJUKvGJaQ6635",
      "name": "Bash",
      "input": {
        "command": "echo \"=== PROXY SOURCE ===\"; cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py; echo; echo \"=== V1 SOURCE ===\"; cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py",
        "description": "Read proxy and v1 source"
      },
      "output": "=== PROXY SOURCE ===\nimport http.client\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nUPSTREAM = \"/var/lib/rollout/upstream\"\n\nclass Handler(BaseHTTPRequestHandler):\n    def forward(self):\n        try:\n            with open(UPSTREAM) as source:\n                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()\n            response_body = response.read()\n            self.send_response(response.status)\n            self.send_header(\"Content-Length\", str(len(response_body)))\n            self.end_headers()\n            self.wfile.write(response_body)\n            connection.close()\n        except Exception:\n            self.send_response(502)\n            self.send_header(\"Content-Length\", \"0\")\n            self.end_headers()\n\n    do_GET = forward\n    do_PUT = forward\n\n    def log_message(self, *_):\n        pass\n\nThreadingHTTPServer((\"0.0.0.0\", 8080), Handler).serve_forever()\n\n=== V1 SOURCE ===\nimport sqlite3\nfrom http.server import BaseHTTPRequestHandler, ThreadingHTTPServer\n\nDB = \"/var/lib/rollout/records.sqlite3\"\n\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\n\nclass Handler(BaseHTTPRequestHandler):\n    def send(self, status, body=b\"\"):\n        self.send_response(status)\n        self.send_header(\"Content-Length\", str(len(body)))\n        self.end_headers()\n        self.wfile.write(body)\n\n    def do_GET(self):\n        if self.path == \"/health\":\n            self.send(200, b\"ready\")\n            return\n        if self.path == \"/version\":\n            self.send(200, b\"v1\")\n            return\n        if self.path.startswith(\"/records/\"):\n            connection = database()\n            row = connection.execute(\"SELECT value FROM records WHERE id=?\", (self.path[9:],)).fetchone()\n            connection.close()\n            if row is None:\n                self.send(404)\n            else:\n                self.send(200, row[0].encode())\n            return\n        self.send(404)\n\n    def do_PUT(self):\n        if not self.path.startswith(\"/records/\"):\n            self.send(404)\n            return\n        value = self.rfile.read(int(self.headers.get(\"Content-Length\", \"0\"))).decode()\n        connection = database()\n        connection.execute(\n            \"INSERT INTO records(id,value) VALUES(?,?) ON CONFLICT(id) DO UPDATE SET value=excluded.value\",\n            (self.path[9:], value),\n        )\n        connection.commit()\n        connection.close()\n        self.send(204)\n\n    def log_message(self, *_):\n        pass\n\nThreadingHTTPServer((\"127.0.0.1\", 8081), Handler).serve_forever()\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 4046,
      "duration_ms": 36
    },
    {
      "id": "call_01_BkYmM7mAlUMyYVGbVe928517",
      "name": "Bash",
      "input": {
        "command": "echo \"=== upstream ===\"; cat /var/lib/rollout/upstream; echo; echo \"=== seed service ===\"; cat /etc/systemd/system/rollout-seed.service 2>&1; echo \"=== records schema ===\"; sqlite3 /var/lib/rollout/records.sqlite3 \".schema\" 2>&1; echo \"=== records ===\"; sqlite3 /var/lib/rollout/records.sqlite3 \"SELECT * FROM records;\" 2>&1",
        "description": "Check upstream file, seed service, and records db"
      },
      "output": "=== upstream ===\n8081\n\n=== seed service ===\n[Unit]\nBefore=rollout-v1.service rollout-v2.service rollout-proxy.service\nDescription=Seed live v1 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/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start/bin/rollout-seed-start \nRemainAfterExit=true\nType=oneshot\n\n[Install]\nWantedBy=multi-user.target\n=== records schema ===\nCREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL);\n=== records ===\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 4082,
      "duration_ms": 70
    },
    {
      "id": "call_00_zchSGlSDBl43o5olEet34280",
      "name": "Bash",
      "input": {
        "command": "cat /nix/store/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start/bin/rollout-seed-start 2>&1",
        "description": "Read seed script"
      },
      "output": "#!/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash\nset -e\n\ninstall -d -m 0755 /var/lib/rollout /opt/rollout\nif [[ ! -e /var/lib/rollout/upstream ]]; then\n  printf '8081\\n' > /var/lib/rollout/upstream\nfi\n/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python - <<'PY'\nimport sqlite3\ndb = sqlite3.connect('/var/lib/rollout/records.sqlite3')\ndb.execute('CREATE TABLE IF NOT EXISTS records (id TEXT PRIMARY KEY, value TEXT NOT NULL)')\nfor record, value in [('customer-alpha-73c', 'alpha-original'), ('customer-beta-a19', 'beta-original')]:\n    db.execute('INSERT OR IGNORE INTO records(id,value) VALUES(?,?)', (record,value))\ndb.commit()\nPY\n\n\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 8682,
      "duration_ms": 25
    },
    {
      "id": "call_01_uiaU5Fm1C1B0J54G4NHc8290",
      "name": "Bash",
      "input": {
        "command": "echo \"=== all rollout units ===\"; ls -la /etc/systemd/system/ | grep -i rollout; echo \"=== is-enabled ===\"; systemctl is-enabled rollout-v1.service rollout-v2.service rollout-proxy.service rollout-seed.service 2>&1; echo \"=== listening ports ===\"; ss -tlnp 2>/dev/null | grep -E '8080|8081|8082' || netstat -tlnp 2>/dev/null | grep -E '8080|8081|8082'",
        "description": "List rollout units and listening ports"
      },
      "output": "=== all rollout units ===\nlrwxrwxrwx  1 root root      92 Jan  1  1970 rollout-proxy.service -> /nix/store/zs0l8ds3rl62nabiwjfgz8bykpp6z6kn-unit-rollout-proxy.service/rollout-proxy.service\nlrwxrwxrwx  1 root root      90 Jan  1  1970 rollout-seed.service -> /nix/store/0ky46lp0ljmkfv9y4sc1w4n2vfkydj8v-unit-rollout-seed.service/rollout-seed.service\nlrwxrwxrwx  1 root root      86 Jan  1  1970 rollout-v1.service -> /nix/store/rcrgmhnjq004n1y7kzpbn6mp5mxfqblh-unit-rollout-v1.service/rollout-v1.service\nlrwxrwxrwx  1 root root      86 Jan  1  1970 rollout-v2.service -> /nix/store/pq9m5zxhsw22kmv4s8nbx7y16ac9pghj-unit-rollout-v2.service/rollout-v2.service\n=== is-enabled ===\nenabled\nenabled\nenabled\nenabled\n=== listening ports ===\nLISTEN 0      5          127.0.0.1:8081       0.0.0.0:*    users:((\"python\",pid=555,fd=3))\nLISTEN 0      5            0.0.0.0:8080       0.0.0.0:*    users:((\"python\",pid=557,fd=3))\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 8708,
      "duration_ms": 201
    },
    {
      "id": "call_00_BJrGMsB6b6ivP8XOWUqm8897",
      "name": "TodoWrite",
      "input": {
        "todos": [
          {
            "activeForm": "Writing v2 service implementation",
            "content": "Write /opt/rollout/v2.py implementing the contract on 127.0.0.1:8082",
            "status": "in_progress"
          },
          {
            "activeForm": "Starting v2 service",
            "content": "Reset v2 failed state and start rollout-v2.service",
            "status": "pending"
          },
          {
            "activeForm": "Verifying v2 on 8082",
            "content": "Verify v2 directly on 8082 (health, version, existing records, PUT/GET)",
            "status": "pending"
          },
          {
            "activeForm": "Switching upstream atomically",
            "content": "Atomically switch /var/lib/rollout/upstream to 8082",
            "status": "pending"
          },
          {
            "activeForm": "Verifying public endpoint",
            "content": "Verify public endpoint 8080 serves v2 and preserves records",
            "status": "pending"
          },
          {
            "activeForm": "Confirming persistence",
            "content": "Confirm persistence across v2 restart and reboot (enabled + on-disk state)",
            "status": "pending"
          }
        ]
      },
      "output": "Added:\n  + Write /opt/rollout/v2.py implementing the contract on 127.0.0.1:8082\n  + Reset v2 failed state and start rollout-v2.service\n  + Verify v2 directly on 8082 (health, version, existing records, PUT/GET)\n  + Atomically switch /var/lib/rollout/upstream to 8082\n  + Verify public endpoint 8080 serves v2 and preserves records\n  + Confirm persistence across v2 restart and reboot (enabled + on-disk state)\n\nCurrent tasks:\n  ◉ Write /opt/rollout/v2.py implementing the contract on 127.0.0.1:8082\n  ○ Reset v2 failed state and start rollout-v2.service\n  ○ Verify v2 directly on 8082 (health, version, existing records, PUT/GET)\n  ○ Atomically switch /var/lib/rollout/upstream to 8082\n  ○ Verify public endpoint 8080 serves v2 and preserves records\n  ○ Confirm persistence across v2 restart and reboot (enabled + on-disk state)\n",
      "is_error": false,
      "read_only": true,
      "started_after_ms": 16188,
      "duration_ms": 0
    }
  ],
  "timing": {
    "total_duration_ms": 26971,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 1583,
        "status": "completed",
        "usage": {
          "input_tokens": 3447,
          "output_tokens": 258,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0013437
        }
      },
      {
        "index": 2,
        "started_after_ms": 1954,
        "duration_ms": 2091,
        "status": "completed",
        "usage": {
          "input_tokens": 3727,
          "output_tokens": 350,
          "cache_read_tokens": 2816,
          "cache_creation_tokens": 0,
          "cost_usd": 0.001554996
        }
      },
      {
        "index": 3,
        "started_after_ms": 4155,
        "duration_ms": 4526,
        "status": "completed",
        "usage": {
          "input_tokens": 8201,
          "output_tokens": 988,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0036459
        }
      },
      {
        "index": 4,
        "started_after_ms": 8913,
        "duration_ms": 7275,
        "status": "completed",
        "usage": {
          "input_tokens": 3042,
          "output_tokens": 1473,
          "cache_read_tokens": 6784,
          "cache_creation_tokens": 0,
          "cost_usd": 0.002720904
        }
      },
      {
        "index": 5,
        "started_after_ms": 16198,
        "duration_ms": 663,
        "status": "retry",
        "failure": "rate_limited"
      },
      {
        "index": 6,
        "started_after_ms": 17988,
        "duration_ms": 666,
        "status": "retry",
        "failure": "rate_limited"
      },
      {
        "index": 7,
        "started_after_ms": 20738,
        "duration_ms": 767,
        "status": "retry",
        "failure": "rate_limited"
      },
      {
        "index": 8,
        "started_after_ms": 26284,
        "duration_ms": 686,
        "status": "error",
        "failure": "rate_limited"
      }
    ]
  }
}