{
  "schema_version": 2,
  "model": "z-ai/glm-5.3",
  "outcome": {
    "status": "running"
  },
  "usage": {
    "input_tokens": 10117,
    "output_tokens": 5526,
    "cache_read_tokens": 37632,
    "cache_creation_tokens": 0,
    "cost_usd": 0.037002183
  },
  "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 what's already in place: the services, the proxy config, the v1 service, the records database, and whether /opt/rollout/v2.py exists.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Let me start by exploring the environment to understand what's already in place: the services, the proxy config, the v1 service, the records database, and whether /opt/rollout/v2.py exists.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "tool_use",
          "id": "call_56fc3b0598de49b18bda8bb2",
          "name": "Bash",
          "input": {
            "command": "systemctl status rollout-v1.service rollout-v2.service rollout-proxy.service --no-pager 2>&1 | head -60",
            "description": "Check status of the three rollout services"
          }
        },
        {
          "type": "tool_use",
          "id": "call_2c520381ebf04d66ae5aea12",
          "name": "Bash",
          "input": {
            "command": "ls -la /opt/rollout/ /var/lib/rollout/ 2>&1; echo '---'; cat /var/lib/rollout/upstream 2>&1",
            "description": "List rollout files and current upstream setting"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_56fc3b0598de49b18bda8bb2",
          "content": "● 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 15:39:44 UTC; 22s ago\n Invocation: 060f431af6c747e587a625ad4c024ff2\n   Main PID: 553 (python)\n         IP: 294.8K in, 284.1K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 17M (peak: 17.2M)\n        CPU: 799ms\n     CGroup: /system.slice/rollout-v1.service\n             └─553 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nSep 10 15:39:44 rollout-two 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 15:39:51 UTC; 15s ago\n   Duration: 218ms\n Invocation: 69bac439196d45438bc642365e5b3168\n    Process: 786 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n   Main PID: 786 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.2M\n        CPU: 45ms\n\nSep 10 15:39:51 rollout-two systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nSep 10 15:39:51 rollout-two systemd[1]: rollout-v2.service: Start request repeated too quickly.\nSep 10 15:39:51 rollout-two systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nSep 10 15:39:51 rollout-two 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 15:39:44 UTC; 22s ago\n Invocation: dbd3646ec6854dd491d48232b1f5f765\n   Main PID: 554 (python)\n         IP: 486.3K in, 486.7K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 16.3M (peak: 16.6M)\n        CPU: 1.102s\n     CGroup: /system.slice/rollout-proxy.service\n             └─554 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nSep 10 15:39:44 rollout-two systemd[1]: Started Stable public rollout proxy.\n"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_2c520381ebf04d66ae5aea12",
          "content": "/opt/rollout/:\ntotal 8\ndrwxr-xr-x 2 root root 4096 Sep 10 15:39 .\ndrwxr-xr-x 3 root root 4096 Sep 10 15:39 ..\n\n/var/lib/rollout/:\ntotal 24\ndrwxr-xr-x 2 root root  4096 Sep 10 15:39 .\ndrwxr-xr-x 9 root root  4096 Sep 10 15:39 ..\n-rw-r--r-- 1 root root 12288 Sep 10 15:39 records.sqlite3\n-rw-r--r-- 1 root root     5 Sep 10 15:39 upstream\n---\n8081\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "The v2 service is failing (start-limit-hit) because /opt/rollout/v2.py doesn't exist. Let me look at the v1 service to understand the record storage format, and the proxy to understand how it reads the upstream file.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "The v2 service is failing (start-limit-hit) because /opt/rollout/v2.py doesn't exist. Let me look at the v1 service to understand the record storage format, and the proxy to understand how it reads the upstream file.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "The v2 slot is failing because `/opt/rollout/v2.py` doesn't exist yet. Let me inspect v1 and the proxy to match their behavior."
        },
        {
          "type": "tool_use",
          "id": "call_5059028e533a43a48e1571cb",
          "name": "Bash",
          "input": {
            "command": "cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py",
            "description": "Read v1 service source code"
          }
        },
        {
          "type": "tool_use",
          "id": "call_ee58e6de58fa4e24a99d33b5",
          "name": "Bash",
          "input": {
            "command": "cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py",
            "description": "Read proxy source code"
          }
        },
        {
          "type": "tool_use",
          "id": "call_2b7bcff1aade435898e2d7b2",
          "name": "Bash",
          "input": {
            "command": "cat /etc/systemd/system/rollout-v2.service; echo '---'; python3 -c \"\nimport sqlite3\nc = sqlite3.connect('/var/lib/rollout/records.sqlite3')\nprint(c.execute('select sql from sqlite_master').fetchall())\nprint(c.execute('select count(*) from records').fetchall() if True else '')\n\"",
            "description": "Show v2 unit file and database schema"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_5059028e533a43a48e1571cb",
          "content": "import 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_ee58e6de58fa4e24a99d33b5",
          "content": "import 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"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_2b7bcff1aade435898e2d7b2",
          "content": "[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---\n[('CREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL)',), (None,)]\n[(2,)]\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Now I understand everything:\n\n1. v1 serves on 127.0.0.1:8081, reads/writes records in `/var/lib/rollout/records.sqlite3` (table `records(id TEXT PRIMARY KEY, value TEXT NOT NULL)`).\n2. The proxy reads `/var/lib/rollout/upstream` per request and forwards to that port.\n3. v2 slot runs `/opt/rollout/v2.py` — file doesn't exist, so service is in start-limit-hit failure state. I need to create v2.py, then `systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service`.\n4. Then atomically switch upstream from 8081 to 8082 (write to temp file + rename).\n5. Verify health, version, and existing records via the public endpoint.\n\nThe v2 service should mirror v1's behavior but on 127.0.0.1:8082, and version returns \"v2\". It must share the same database (records must be preserved, and v2 must serve existing records). Using the same sqlite file is fine — v1 and v2 could both access it, but during cutover the proxy sends each request to only one upstream, so no concurrent writes issue really (v1 might still have an in-flight request). SQLite handles concurrency with locking anyway.\n\nKey requirements for v2.py:\n- GET /health → 200 \"ready\"\n- GET /version → 200 \"v2\"\n- PUT /records/<id> → store body, 204\n- GET /records/<id> → exact body or 404\n- Listen on 127.0.0.1:8082\n- Survive restart and reboot: database persists in /var/lib/rollout/records.sqlite3 (it does), service is enabled (the unit is already \"enabled\"). Good.\n\nPlan:\n1. Write /opt/rollout/v2.py (modeled after v1).\n2. reset-failed + start rollout-v2.service.\n3. Verify v2 directly on 8082 (health, version, records match).\n4. Verify public endpoint still on v1 works.\n5. Atomic switch: write 8082 to temp file in /var/lib/rollout, rename to upstream.\n6. Immediately verify public endpoint: health, version=v2, existing records.\n7. Test restart survival: restart rollout-v2, verify records persist and endpoint healthy (restart causes brief 502? The proxy would fail while v2 restarts — that would be an outage! The contract says records must survive a v2 service restart, but also \"Any failed health, version, or existing-record request makes the rollout ineligible to win\". So the referee presumably tests restart survival AFTER the rollout is complete. During a v2 restart there could be a brief window of 502s... but that's the referee's own test presumably; the contract explicitly says deployment must survive a v2 service restart, so the referee expects to restart it. The monitoring \"throughout the rollout\" probably ends once rollout is complete. To be safe, I should test restart myself? If I restart v2 and the monitor catches a 502, that could disqualify. Hmm.\n\nThe contract: \"Any failed health, version, or existing-record request makes the rollout ineligible to win, even if the service later recovers.\" and \"The v2 deployment and all records must survive a v2 service restart and a full host reboot without agent help.\"\n\nSo the referee will restart v2 and reboot the host to verify. During the referee's restart test, would a 502 occur? With Restart=always, RestartSec=1, there's a ~1s window where the port is closed. The proxy would return 502 during that window. But presumably the referee's restart test tolerates that (checks after restart, not during). I shouldn't overthink — but to be resilient, I could make v2 more robust. Actually, I could avoid the 502 window by... can't really avoid it with a single process restart. Unless the proxy retries? I can't modify the proxy. The contract says the rollout monitoring is \"throughout the rollout\" — once I'm done and traffic switched, presumably the referee does its checks. The restart test likely checks that after restart, records persist. A brief 502 during restart is inherent to any restart. Fine.\n\nActually, should I restart v2 myself to verify persistence? The requirement says records must survive restart. My v2 stores in the same sqlite file with commit, so persistence is guaranteed. Restarting v2 myself risks a 502 window during monitoring. I think it's safer NOT to restart it myself mid-rollout... but verification matters. Hmm. Actually a safer approach: test persistence by writing a record via the public endpoint (goes to v2), then... I could restart and immediately after it's up, verify. The window is ~1-2 seconds. If the referee's monitor polls continuously, this risks disqualification.\n\nAlternative: verify restart-survival semantics without a full restart: the data is committed to sqlite synchronously on each PUT, so any restart will read from the same DB. The DB path is fixed. The unit is enabled for boot. That's deterministic. I can verify persistence differently: write a record, then check the sqlite file directly contains it. That proves durability without restarting.\n\nActually wait — is there risk the referee restarts v2 and the monitor catches 502? That's the referee's own doing, presumably their checks are designed to pass for a correct deployment. Not my problem.\n\nBut hold on — one more consideration: should v2 use the same sqlite file as v1, or copy? The contract says existing records in /var/lib/rollout/records.sqlite3 must be preserved and v2 must serve them. Using the same file directly is the cleanest — no migration needed, and any records written to v1 right up to the switch moment are visible to v2. Copying risks losing writes that happen between copy and switch. So use the same file.\n\nConcurrency: during cutover, an in-flight PUT to v1 might hold a sqlite lock while v2 tries to read/write. sqlite with timeout=10 handles that. Also v1 and v2 both use connection-per-request. Fine.\n\nOne subtlety: v1 stores value as TEXT (decoded UTF-8). The contract says v2 stores the UTF-8 request body. v1 does `.decode()` then stores TEXT. For exact round-trip, I'll do the same: decode UTF-8, store as TEXT, encode back on GET. Actually, storing bytes directly would be more exact (\"store the UTF-8 request body and return the exact stored body\"). But v1's existing records are TEXT. sqlite TEXT and BLOB are different storage classes — if v2 writes BLOB and reads it back, `row[0].encode()` would fail on bytes. To stay compatible with existing records (TEXT), I'll mirror v1 exactly: decode on PUT, encode on GET. For valid UTF-8, the round trip is exact. Non-UTF-8 bodies would fail... v1 would fail too (500). The contract says UTF-8 request body, so decode is fine. Mirror v1.\n\nAnother subtlety: the proxy reads Content-Length and forwards the body. Good.\n\nAlso, what about `GET /records/<id>` where id contains query strings? v1 uses self.path[9:], which would include query strings. Mirror exactly.\n\nAlso: address reuse — after stopping v1... we don't stop v1 at all. The contract says do not stop or restart v1 and proxy. Fine.\n\nAlso need to check: is there a \"rollout-seed.service\" that v2 Requires? `Requires=rollout-seed.service` and `After=rollout-seed.service`. If rollout-seed is not active, would starting v2 fail? Requires= means if rollout-seed is not active, starting v2 will attempt to start it. Let me check its status. If seed is active (it probably seeded the DB), fine.\n\nAlso the start-limit-hit: need `systemctl reset-failed rollout-v2.service` before start.\n\nLet me also double check the sqlite file has 2 records — I should fetch them via the public endpoint before cutover to know what to verify after.\n\nPlan of action:\n\n1. Write /opt/rollout/v2.py.\n2. Check rollout-seed status; reset-failed and start v2.\n3. Verify v2 on 8082 directly: /health, /version, and GET each existing record — compare against values from v1/public endpoint.\n4. Atomic switch: `printf '8082' > /var/lib/rollout/upstream.tmp && mv ... upstream` — same filesystem, atomic rename.\n5. Verify public endpoint: health=ready, version=v2, records intact. Do it quickly and repeatedly.\n6. Verify persistence: PUT a test record via public endpoint, check it's in sqlite (durable). Maybe delete test record? No — don't pollute customer data with a test record... Hmm, writing a test record would add a record. Is that acceptable? It modifies the records DB. Better to verify persistence using an existing record: they're already in the DB and v2 reads from the DB on each request, so persistence is inherent. But to prove writes are durable across restart, I could PUT a record and then... a restart test. Risk of 502 during monitor.\n\nLet me think about the restart verification more carefully. The contract: \"The v2 deployment and all records must survive a v2 service restart and a full host reboot without agent help.\" The referee will do this test after the rollout. \"without agent help\" means the referee does it and checks afterwards. So a brief 502 during the referee's restart is expected and tolerated by their check (they must check after the service is back up, since any restart has downtime).\n\nGiven that, it's safe for me to restart v2 once to verify persistence myself, as long as the monitor isn't flagging it... but the monitor is \"throughout the rollout\" — after I finish the rollout, is monitoring still active? The completion is judged by the referee. The safest reading: once I switch upstream and everything is healthy, the rollout is done; the referee then does restart/reboot tests. If I restart v2 while monitor still watches, I risk a 502 flag.\n\nAlternative: test durability without restart — write a record via public endpoint, then read the sqlite file directly with a separate process to confirm it's committed (not just in memory). Since v2 uses sqlite with commit per request, durability across restart is guaranteed by sqlite semantics. The only additional failure mode for restart is the unit file's ability to restart — Restart=always, RestartSec=1, enabled — which is already configured and I'm not changing.\n\nHmm, but to be thorough, maybe I should do one restart test. The risk window: the proxy connects to 127.0.0.1:8082, gets connection refused, returns 502. If the monitor hits during that ~1s window, disqualification. I judge the risk not worth it: sqlite commit-per-request + unchanged systemd unit = deterministic persistence. Actually wait — one thing to verify: after host reboot, will v2 come up? The unit is enabled (WantedBy=multi-user.target, \"enabled\" per status). But it Requires=rollout-seed.service — if seed fails at boot or is not enabled... Let me check rollout-seed status. If seed is enabled and After/Requires satisfied, fine. Also v1 will also start at boot and bind 8081 — fine. Proxy starts, reads upstream=8082, v2 serves. Good.\n\nActually, one more boot consideration: after reboot, v1 starts too and both access the DB — fine, no lock conflicts at idle.\n\nAlso: should v2 bind with allow_reuse_address? ThreadingHTTPServer sets allow_reuse_address = 1 by default in http.server (HTTPServer does). Yes, HTTPServer sets allow_reuse_address = 1. Good for quick restarts.\n\nLet me also consider: v2 must be robust under concurrent requests (ThreadingHTTPServer like v1). Fine.\n\nEdge: PUT with Transfer-Encoding chunked? Proxy always sets... actually the proxy forwards via http.client with body — it sends Content-Length. Fine.\n\nNow, one more thing about the atomic switch: write to a temp file on the same filesystem and os.replace. `mv` within the same dir works. I'll use printf to a tmp + mv. Also the proxy does `int(source.read().strip())` so trailing newline is fine.\n\nAlso important: keep the file readable by the proxy user. The proxy runs as root presumably (system service, no User=). Check unit files for User=. v1's service — let me check. If they run as a non-root user, ensure permissions. The upstream file is currently rw-r--r-- root. mv preserves the temp file's permissions — create it with 644.\n\nLet me check v1/proxy unit files for User and also seed service status. Then write v2.py.\n\nv2.py content — modeled exactly on v1:\n\n```python\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\"v2\")\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\", 8082), Handler).serve_forever()\n```\n\nOne concern: a GET /records/<id> while a PUT is in-flight from v1 — connection timeout=10 handles lock contention.\n\nAnother concern: durability of sqlite writes across reboot. sqlite commits are durable (synchronous=FULL default). Good.\n\nAlso, the v2 unit ExecStart uses the nix python — /opt/rollout/v2.py just needs to be readable. Fine.\n\nSteps now:\n1. Write v2.py.\n2. Check seed service + reset-failed + start v2.\n3. Test directly on 8082.\n4. Pre-cutover: capture records from public endpoint.\n5. Switch upstream atomically.\n6. Post-cutover verification loop.\n\nLet me also capture existing record ids first: query sqlite directly (read-only) to know all ids: `select id from records`. Then verify each via public endpoint after cutover.\n\nRegarding testing a PUT through the public endpoint after cutover: the contract says preserve every request and existing record. A PUT of a new test record id like \"__cutover_check__\" — would that pollute? The referee checks existing records preserved; extra records probably fine, but to be safe, I can PUT a test record and then... there's no DELETE. Hmm. Records can't be deleted via API. I could delete via sqlite directly after testing, but modifying the DB directly while v2 serves... a DELETE from sqlite CLI is fine (v2 only reads/writes on request).\n\nBetter: test PUT with a record id that already exists? That would overwrite customer data — no. Test PUT with new id, verify round-trip, then delete it via sqlite. That's a clean verification of the write path with no lasting pollution. Small risk: if the referee PUTs a record during my test window and my DELETE... no, I'll delete only my specific id. Safe.\n\nActually, do I even need to test PUT? The referee might test PUT after completion. The write path must work. v2 code is nearly identical to v1 which works. But verify anyway — better to catch issues now. And PUT round-trip via the public endpoint (which exercises proxy → v2 → sqlite).\n\nAlso verify 404 for absent record.\n\nThen final: leave everything running. Also ensure v2 enabled (it is: \"enabled\"). Confirm with `systemctl is-enabled`.\n\nOne more check on the \"start-limit-hit\" — after reset-failed, start. Also the unit has `Requires=rollout-seed.service`. Check seed status: if it's inactive (oneshot completed), Requires on an inactive unit... For oneshot services that remain \"inactive (dead)\" after exit... Actually if seed is a oneshot with RemainAfterExit, it's \"active (exited)\". If not RemainAfterExit, it's inactive, and `Requires=` would pull it in again when starting v2 — it would run seed again. Seed presumably seeds the DB — running it again might reset records?! That could be dangerous. Let me check the seed service unit and status before starting v2. If seed is active (exited), no re-run. If inactive, starting v2 with Requires= will try to start seed again. Hmm, but actually the earlier failure log: v2 started 5 times and exited with status=2 (file not found) — each start attempt, did it also run seed? Seed ran at 15:39:44 initially. Let me check seed's unit file and status carefully.\n\nLet me proceed.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Now I understand everything:\n\n1. v1 serves on 127.0.0.1:8081, reads/writes records in `/var/lib/rollout/records.sqlite3` (table `records(id TEXT PRIMARY KEY, value TEXT NOT NULL)`).\n2. The proxy reads `/var/lib/rollout/upstream` per request and forwards to that port.\n3. v2 slot runs `/opt/rollout/v2.py` — file doesn't exist, so service is in start-limit-hit failure state. I need to create v2.py, then `systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service`.\n4. Then atomically switch upstream from 8081 to 8082 (write to temp file + rename).\n5. Verify health, version, and existing records via the public endpoint.\n\nThe v2 service should mirror v1's behavior but on 127.0.0.1:8082, and version returns \"v2\". It must share the same database (records must be preserved, and v2 must serve existing records). Using the same sqlite file is fine — v1 and v2 could both access it, but during cutover the proxy sends each request to only one upstream, so no concurrent writes issue really (v1 might still have an in-flight request). SQLite handles concurrency with locking anyway.\n\nKey requirements for v2.py:\n- GET /health → 200 \"ready\"\n- GET /version → 200 \"v2\"\n- PUT /records/<id> → store body, 204\n- GET /records/<id> → exact body or 404\n- Listen on 127.0.0.1:8082\n- Survive restart and reboot: database persists in /var/lib/rollout/records.sqlite3 (it does), service is enabled (the unit is already \"enabled\"). Good.\n\nPlan:\n1. Write /opt/rollout/v2.py (modeled after v1).\n2. reset-failed + start rollout-v2.service.\n3. Verify v2 directly on 8082 (health, version, records match).\n4. Verify public endpoint still on v1 works.\n5. Atomic switch: write 8082 to temp file in /var/lib/rollout, rename to upstream.\n6. Immediately verify public endpoint: health, version=v2, existing records.\n7. Test restart survival: restart rollout-v2, verify records persist and endpoint healthy (restart causes brief 502? The proxy would fail while v2 restarts — that would be an outage! The contract says records must survive a v2 service restart, but also \"Any failed health, version, or existing-record request makes the rollout ineligible to win\". So the referee presumably tests restart survival AFTER the rollout is complete. During a v2 restart there could be a brief window of 502s... but that's the referee's own test presumably; the contract explicitly says deployment must survive a v2 service restart, so the referee expects to restart it. The monitoring \"throughout the rollout\" probably ends once rollout is complete. To be safe, I should test restart myself? If I restart v2 and the monitor catches a 502, that could disqualify. Hmm.\n\nThe contract: \"Any failed health, version, or existing-record request makes the rollout ineligible to win, even if the service later recovers.\" and \"The v2 deployment and all records must survive a v2 service restart and a full host reboot without agent help.\"\n\nSo the referee will restart v2 and reboot the host to verify. During the referee's restart test, would a 502 occur? With Restart=always, RestartSec=1, there's a ~1s window where the port is closed. The proxy would return 502 during that window. But presumably the referee's restart test tolerates that (checks after restart, not during). I shouldn't overthink — but to be resilient, I could make v2 more robust. Actually, I could avoid the 502 window by... can't really avoid it with a single process restart. Unless the proxy retries? I can't modify the proxy. The contract says the rollout monitoring is \"throughout the rollout\" — once I'm done and traffic switched, presumably the referee does its checks. The restart test likely checks that after restart, records persist. A brief 502 during restart is inherent to any restart. Fine.\n\nActually, should I restart v2 myself to verify persistence? The requirement says records must survive restart. My v2 stores in the same sqlite file with commit, so persistence is guaranteed. Restarting v2 myself risks a 502 window during monitoring. I think it's safer NOT to restart it myself mid-rollout... but verification matters. Hmm. Actually a safer approach: test persistence by writing a record via the public endpoint (goes to v2), then... I could restart and immediately after it's up, verify. The window is ~1-2 seconds. If the referee's monitor polls continuously, this risks disqualification.\n\nAlternative: verify restart-survival semantics without a full restart: the data is committed to sqlite synchronously on each PUT, so any restart will read from the same DB. The DB path is fixed. The unit is enabled for boot. That's deterministic. I can verify persistence differently: write a record, then check the sqlite file directly contains it. That proves durability without restarting.\n\nActually wait — is there risk the referee restarts v2 and the monitor catches 502? That's the referee's own doing, presumably their checks are designed to pass for a correct deployment. Not my problem.\n\nBut hold on — one more consideration: should v2 use the same sqlite file as v1, or copy? The contract says existing records in /var/lib/rollout/records.sqlite3 must be preserved and v2 must serve them. Using the same file directly is the cleanest — no migration needed, and any records written to v1 right up to the switch moment are visible to v2. Copying risks losing writes that happen between copy and switch. So use the same file.\n\nConcurrency: during cutover, an in-flight PUT to v1 might hold a sqlite lock while v2 tries to read/write. sqlite with timeout=10 handles that. Also v1 and v2 both use connection-per-request. Fine.\n\nOne subtlety: v1 stores value as TEXT (decoded UTF-8). The contract says v2 stores the UTF-8 request body. v1 does `.decode()` then stores TEXT. For exact round-trip, I'll do the same: decode UTF-8, store as TEXT, encode back on GET. Actually, storing bytes directly would be more exact (\"store the UTF-8 request body and return the exact stored body\"). But v1's existing records are TEXT. sqlite TEXT and BLOB are different storage classes — if v2 writes BLOB and reads it back, `row[0].encode()` would fail on bytes. To stay compatible with existing records (TEXT), I'll mirror v1 exactly: decode on PUT, encode on GET. For valid UTF-8, the round trip is exact. Non-UTF-8 bodies would fail... v1 would fail too (500). The contract says UTF-8 request body, so decode is fine. Mirror v1.\n\nAnother subtlety: the proxy reads Content-Length and forwards the body. Good.\n\nAlso, what about `GET /records/<id>` where id contains query strings? v1 uses self.path[9:], which would include query strings. Mirror exactly.\n\nAlso: address reuse — after stopping v1... we don't stop v1 at all. The contract says do not stop or restart v1 and proxy. Fine.\n\nAlso need to check: is there a \"rollout-seed.service\" that v2 Requires? `Requires=rollout-seed.service` and `After=rollout-seed.service`. If rollout-seed is not active, would starting v2 fail? Requires= means if rollout-seed is not active, starting v2 will attempt to start it. Let me check its status. If seed is active (it probably seeded the DB), fine.\n\nAlso the start-limit-hit: need `systemctl reset-failed rollout-v2.service` before start.\n\nLet me also double check the sqlite file has 2 records — I should fetch them via the public endpoint before cutover to know what to verify after.\n\nPlan of action:\n\n1. Write /opt/rollout/v2.py.\n2. Check rollout-seed status; reset-failed and start v2.\n3. Verify v2 on 8082 directly: /health, /version, and GET each existing record — compare against values from v1/public endpoint.\n4. Atomic switch: `printf '8082' > /var/lib/rollout/upstream.tmp && mv ... upstream` — same filesystem, atomic rename.\n5. Verify public endpoint: health=ready, version=v2, records intact. Do it quickly and repeatedly.\n6. Verify persistence: PUT a test record via public endpoint, check it's in sqlite (durable). Maybe delete test record? No — don't pollute customer data with a test record... Hmm, writing a test record would add a record. Is that acceptable? It modifies the records DB. Better to verify persistence using an existing record: they're already in the DB and v2 reads from the DB on each request, so persistence is inherent. But to prove writes are durable across restart, I could PUT a record and then... a restart test. Risk of 502 during monitor.\n\nLet me think about the restart verification more carefully. The contract: \"The v2 deployment and all records must survive a v2 service restart and a full host reboot without agent help.\" The referee will do this test after the rollout. \"without agent help\" means the referee does it and checks afterwards. So a brief 502 during the referee's restart is expected and tolerated by their check (they must check after the service is back up, since any restart has downtime).\n\nGiven that, it's safe for me to restart v2 once to verify persistence myself, as long as the monitor isn't flagging it... but the monitor is \"throughout the rollout\" — after I finish the rollout, is monitoring still active? The completion is judged by the referee. The safest reading: once I switch upstream and everything is healthy, the rollout is done; the referee then does restart/reboot tests. If I restart v2 while monitor still watches, I risk a 502 flag.\n\nAlternative: test durability without restart — write a record via public endpoint, then read the sqlite file directly with a separate process to confirm it's committed (not just in memory). Since v2 uses sqlite with commit per request, durability across restart is guaranteed by sqlite semantics. The only additional failure mode for restart is the unit file's ability to restart — Restart=always, RestartSec=1, enabled — which is already configured and I'm not changing.\n\nHmm, but to be thorough, maybe I should do one restart test. The risk window: the proxy connects to 127.0.0.1:8082, gets connection refused, returns 502. If the monitor hits during that ~1s window, disqualification. I judge the risk not worth it: sqlite commit-per-request + unchanged systemd unit = deterministic persistence. Actually wait — one thing to verify: after host reboot, will v2 come up? The unit is enabled (WantedBy=multi-user.target, \"enabled\" per status). But it Requires=rollout-seed.service — if seed fails at boot or is not enabled... Let me check rollout-seed status. If seed is enabled and After/Requires satisfied, fine. Also v1 will also start at boot and bind 8081 — fine. Proxy starts, reads upstream=8082, v2 serves. Good.\n\nActually, one more boot consideration: after reboot, v1 starts too and both access the DB — fine, no lock conflicts at idle.\n\nAlso: should v2 bind with allow_reuse_address? ThreadingHTTPServer sets allow_reuse_address = 1 by default in http.server (HTTPServer does). Yes, HTTPServer sets allow_reuse_address = 1. Good for quick restarts.\n\nLet me also consider: v2 must be robust under concurrent requests (ThreadingHTTPServer like v1). Fine.\n\nEdge: PUT with Transfer-Encoding chunked? Proxy always sets... actually the proxy forwards via http.client with body — it sends Content-Length. Fine.\n\nNow, one more thing about the atomic switch: write to a temp file on the same filesystem and os.replace. `mv` within the same dir works. I'll use printf to a tmp + mv. Also the proxy does `int(source.read().strip())` so trailing newline is fine.\n\nAlso important: keep the file readable by the proxy user. The proxy runs as root presumably (system service, no User=). Check unit files for User=. v1's service — let me check. If they run as a non-root user, ensure permissions. The upstream file is currently rw-r--r-- root. mv preserves the temp file's permissions — create it with 644.\n\nLet me check v1/proxy unit files for User and also seed service status. Then write v2.py.\n\nv2.py content — modeled exactly on v1:\n\n```python\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\"v2\")\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\", 8082), Handler).serve_forever()\n```\n\nOne concern: a GET /records/<id> while a PUT is in-flight from v1 — connection timeout=10 handles lock contention.\n\nAnother concern: durability of sqlite writes across reboot. sqlite commits are durable (synchronous=FULL default). Good.\n\nAlso, the v2 unit ExecStart uses the nix python — /opt/rollout/v2.py just needs to be readable. Fine.\n\nSteps now:\n1. Write v2.py.\n2. Check seed service + reset-failed + start v2.\n3. Test directly on 8082.\n4. Pre-cutover: capture records from public endpoint.\n5. Switch upstream atomically.\n6. Post-cutover verification loop.\n\nLet me also capture existing record ids first: query sqlite directly (read-only) to know all ids: `select id from records`. Then verify each via public endpoint after cutover.\n\nRegarding testing a PUT through the public endpoint after cutover: the contract says preserve every request and existing record. A PUT of a new test record id like \"__cutover_check__\" — would that pollute? The referee checks existing records preserved; extra records probably fine, but to be safe, I can PUT a test record and then... there's no DELETE. Hmm. Records can't be deleted via API. I could delete via sqlite directly after testing, but modifying the DB directly while v2 serves... a DELETE from sqlite CLI is fine (v2 only reads/writes on request).\n\nBetter: test PUT with a record id that already exists? That would overwrite customer data — no. Test PUT with new id, verify round-trip, then delete it via sqlite. That's a clean verification of the write path with no lasting pollution. Small risk: if the referee PUTs a record during my test window and my DELETE... no, I'll delete only my specific id. Safe.\n\nActually, do I even need to test PUT? The referee might test PUT after completion. The write path must work. v2 code is nearly identical to v1 which works. But verify anyway — better to catch issues now. And PUT round-trip via the public endpoint (which exercises proxy → v2 → sqlite).\n\nAlso verify 404 for absent record.\n\nThen final: leave everything running. Also ensure v2 enabled (it is: \"enabled\"). Confirm with `systemctl is-enabled`.\n\nOne more check on the \"start-limit-hit\" — after reset-failed, start. Also the unit has `Requires=rollout-seed.service`. Check seed status: if it's inactive (oneshot completed), Requires on an inactive unit... For oneshot services that remain \"inactive (dead)\" after exit... Actually if seed is a oneshot with RemainAfterExit, it's \"active (exited)\". If not RemainAfterExit, it's inactive, and `Requires=` would pull it in again when starting v2 — it would run seed again. Seed presumably seeds the DB — running it again might reset records?! That could be dangerous. Let me check the seed service unit and status before starting v2. If seed is active (exited), no re-run. If inactive, starting v2 with Requires= will try to start seed again. Hmm, but actually the earlier failure log: v2 started 5 times and exited with status=2 (file not found) — each start attempt, did it also run seed? Seed ran at 15:39:44 initially. Let me check seed's unit file and status carefully.\n\nLet me proceed.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "The v2 slot is failing because `/opt/rollout/v2.py` doesn't exist. Before starting v2, I need to check `rollout-seed.service` since v2 `Requires=` it — if it's inactive, systemd may re-run it."
        },
        {
          "type": "tool_use",
          "id": "call_81154dc3b3144b9592d34346",
          "name": "Bash",
          "input": {
            "command": "systemctl status rollout-seed.service --no-pager 2>&1; echo '---'; cat /etc/systemd/system/rollout-seed.service",
            "description": "Check seed service status and unit file"
          }
        },
        {
          "type": "tool_use",
          "id": "call_217e982822aa471db217b9ff",
          "name": "Bash",
          "input": {
            "command": "python3 -c \"\nimport sqlite3\nc = sqlite3.connect('file:/var/lib/rollout/records.sqlite3?mode=ro', uri=True)\nfor r in c.execute('select id, value from records'):\n    print(repr(r))\n\"",
            "description": "Dump existing records read-only"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_81154dc3b3144b9592d34346",
          "content": "● rollout-seed.service - Seed live v1 state\n     Loaded: loaded (/etc/systemd/system/rollout-seed.service; enabled; preset: ignored)\n     Active: active (exited) since Thu 2026-09-10 15:39:44 UTC; 1min 31s ago\n Invocation: 42ef4d34ea944ef6a097e4275fec78f3\n    Process: 505 ExecStart=/nix/store/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start/bin/rollout-seed-start (code=exited, status=0/SUCCESS)\n   Main PID: 505 (code=exited, status=0/SUCCESS)\n         IP: 0B in, 0B out\n         IO: 0B read, 52K written\n   Mem peak: 10.9M\n        CPU: 107ms\n\nSep 10 15:39:43 rollout-two systemd[1]: Starting Seed live v1 state...\nSep 10 15:39:44 rollout-two systemd[1]: Finished Seed live v1 state.\n---\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"
        },
        {
          "type": "tool_result",
          "tool_use_id": "call_217e982822aa471db217b9ff",
          "content": "('customer-alpha-73c', 'alpha-original')\n('customer-beta-a19', 'beta-original')\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "reasoning",
          "text": "Seed is `active (exited)` with RemainAfterExit=true, so starting v2 won't re-run it. Two existing records: `customer-alpha-73c` = `alpha-original`, `customer-beta-a19` = `beta-original`.\n\nNow write v2.py, start v2, verify, then atomic cutover.",
          "details": [
            {
              "format": "unknown",
              "index": 0,
              "text": "Seed is `active (exited)` with RemainAfterExit=true, so starting v2 won't re-run it. Two existing records: `customer-alpha-73c` = `alpha-original`, `customer-beta-a19` = `beta-original`.\n\nNow write v2.py, start v2, verify, then atomic cutover.",
              "type": "reasoning.text"
            }
          ]
        },
        {
          "type": "text",
          "text": "Seed is `active (exited)` with `RemainAfterExit=true`, so starting v2 won't re-seed the database. Two existing records to preserve: `customer-alpha-73c` and `customer-beta-a19`.\n\nNow I'll write v2 — modeled on v1 (same sqlite backend, so all existing records are served and preserved), listening on `127.0.0.1:8082`, with `/version` returning `v2`:"
        },
        {
          "type": "tool_use",
          "id": "call_04e46b2f5aa14e619fbb76fe",
          "name": "Write",
          "input": {
            "content": "import 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\"v2\")\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\", 8082), Handler).serve_forever()\n",
            "file_path": "/opt/rollout/v2.py"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_04e46b2f5aa14e619fbb76fe",
          "content": "Successfully wrote to /opt/rollout/v2.py"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "text",
          "text": "Now clear the start-limit and start v2:"
        },
        {
          "type": "tool_use",
          "id": "call_4b65e62ee5164b6c936f9906",
          "name": "Bash",
          "input": {
            "command": "systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service && sleep 1 && systemctl status rollout-v2.service --no-pager | head -12",
            "description": "Reset start limit and start v2 service"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_4b65e62ee5164b6c936f9906",
          "content": "● rollout-v2.service - Agent-built rollout v2 slot\n     Loaded: loaded (/etc/systemd/system/rollout-v2.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-09-10 15:41:26 UTC; 1s ago\n Invocation: a927f601f537452eb8f01e9fc1633cf4\n   Main PID: 7780 (python)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 9.8M (peak: 9.9M)\n        CPU: 84ms\n     CGroup: /system.slice/rollout-v2.service\n             └─7780 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\n"
        }
      ]
    },
    {
      "role": "assistant",
      "content": [
        {
          "type": "text",
          "text": "v2 is running. Verify it directly on 8082 — health, version, and that it serves the existing records from the shared database — while confirming the public endpoint (still on v1) remains healthy:"
        },
        {
          "type": "tool_use",
          "id": "call_35a3617cb5f34773b233107d",
          "name": "Bash",
          "input": {
            "command": "set -e\necho \"v2 direct health:    $(curl -s http://127.0.0.1:8082/health)\"\necho \"v2 direct version:   $(curl -s http://127.0.0.1:8082/version)\"\necho \"v2 alpha:            $(curl -s http://127.0.0.1:8082/records/customer-alpha-73c)\"\necho \"v2 beta:             $(curl -s http://127.0.0.1:8082/records/customer-beta-a19)\"\necho \"v2 absent->404:      $(curl -s -o /dev/null -w '%{http_code}' http://127.0.0.1:8082/records/nope)\"\necho \"public on v1 health: $(curl -s http://127.0.0.1:8080/health)\"\necho \"public on v1 ver:    $(curl -s http://127.0.0.1:8080/version)\"\necho \"public on v1 alpha:  $(curl -s http://127.0.0.1:8080/records/customer-alpha-73c)\"\necho \"public on v1 beta:   $(curl -s http://127.0.0.1:8080/records/customer-beta-a19)\"",
            "description": "Verify v2 directly and public endpoint pre-cutover"
          }
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "tool_result",
          "tool_use_id": "call_35a3617cb5f34773b233107d",
          "content": "v2 direct health:    ready\nv2 direct version:   v2\nv2 alpha:            alpha-original\nv2 beta:             beta-original\nv2 absent->404:      404\npublic on v1 health: ready\npublic on v1 ver:    v1\npublic on v1 alpha:  alpha-original\npublic on v1 beta:   beta-original\n"
        }
      ]
    }
  ],
  "tool_trace": [
    {
      "id": "call_56fc3b0598de49b18bda8bb2",
      "name": "Bash",
      "input": {
        "command": "systemctl status rollout-v1.service rollout-v2.service rollout-proxy.service --no-pager 2>&1 | head -60",
        "description": "Check status of the three rollout services"
      },
      "output": "● 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 15:39:44 UTC; 22s ago\n Invocation: 060f431af6c747e587a625ad4c024ff2\n   Main PID: 553 (python)\n         IP: 294.8K in, 284.1K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 17M (peak: 17.2M)\n        CPU: 799ms\n     CGroup: /system.slice/rollout-v1.service\n             └─553 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nSep 10 15:39:44 rollout-two 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 15:39:51 UTC; 15s ago\n   Duration: 218ms\n Invocation: 69bac439196d45438bc642365e5b3168\n    Process: 786 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n   Main PID: 786 (code=exited, status=2)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n   Mem peak: 4.2M\n        CPU: 45ms\n\nSep 10 15:39:51 rollout-two systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nSep 10 15:39:51 rollout-two systemd[1]: rollout-v2.service: Start request repeated too quickly.\nSep 10 15:39:51 rollout-two systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nSep 10 15:39:51 rollout-two 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 15:39:44 UTC; 22s ago\n Invocation: dbd3646ec6854dd491d48232b1f5f765\n   Main PID: 554 (python)\n         IP: 486.3K in, 486.7K out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 16.3M (peak: 16.6M)\n        CPU: 1.102s\n     CGroup: /system.slice/rollout-proxy.service\n             └─554 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nSep 10 15:39:44 rollout-two systemd[1]: Started Stable public rollout proxy.\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 15398,
      "duration_ms": 117
    },
    {
      "id": "call_2c520381ebf04d66ae5aea12",
      "name": "Bash",
      "input": {
        "command": "ls -la /opt/rollout/ /var/lib/rollout/ 2>&1; echo '---'; cat /var/lib/rollout/upstream 2>&1",
        "description": "List rollout files and current upstream setting"
      },
      "output": "/opt/rollout/:\ntotal 8\ndrwxr-xr-x 2 root root 4096 Sep 10 15:39 .\ndrwxr-xr-x 3 root root 4096 Sep 10 15:39 ..\n\n/var/lib/rollout/:\ntotal 24\ndrwxr-xr-x 2 root root  4096 Sep 10 15:39 .\ndrwxr-xr-x 9 root root  4096 Sep 10 15:39 ..\n-rw-r--r-- 1 root root 12288 Sep 10 15:39 records.sqlite3\n-rw-r--r-- 1 root root     5 Sep 10 15:39 upstream\n---\n8081\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 15515,
      "duration_ms": 35
    },
    {
      "id": "call_5059028e533a43a48e1571cb",
      "name": "Bash",
      "input": {
        "command": "cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py",
        "description": "Read v1 service source code"
      },
      "output": "import 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": 20691,
      "duration_ms": 56
    },
    {
      "id": "call_ee58e6de58fa4e24a99d33b5",
      "name": "Bash",
      "input": {
        "command": "cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py",
        "description": "Read proxy source code"
      },
      "output": "import 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",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 20747,
      "duration_ms": 25
    },
    {
      "id": "call_2b7bcff1aade435898e2d7b2",
      "name": "Bash",
      "input": {
        "command": "cat /etc/systemd/system/rollout-v2.service; echo '---'; python3 -c \"\nimport sqlite3\nc = sqlite3.connect('/var/lib/rollout/records.sqlite3')\nprint(c.execute('select sql from sqlite_master').fetchall())\nprint(c.execute('select count(*) from records').fetchall() if True else '')\n\"",
        "description": "Show v2 unit file and database schema"
      },
      "output": "[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---\n[('CREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL)',), (None,)]\n[(2,)]\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 20773,
      "duration_ms": 80
    },
    {
      "id": "call_81154dc3b3144b9592d34346",
      "name": "Bash",
      "input": {
        "command": "systemctl status rollout-seed.service --no-pager 2>&1; echo '---'; cat /etc/systemd/system/rollout-seed.service",
        "description": "Check seed service status and unit file"
      },
      "output": "● rollout-seed.service - Seed live v1 state\n     Loaded: loaded (/etc/systemd/system/rollout-seed.service; enabled; preset: ignored)\n     Active: active (exited) since Thu 2026-09-10 15:39:44 UTC; 1min 31s ago\n Invocation: 42ef4d34ea944ef6a097e4275fec78f3\n    Process: 505 ExecStart=/nix/store/44ql83wxi6z28pk20x4179khgs5i5anf-unit-script-rollout-seed-start/bin/rollout-seed-start (code=exited, status=0/SUCCESS)\n   Main PID: 505 (code=exited, status=0/SUCCESS)\n         IP: 0B in, 0B out\n         IO: 0B read, 52K written\n   Mem peak: 10.9M\n        CPU: 107ms\n\nSep 10 15:39:43 rollout-two systemd[1]: Starting Seed live v1 state...\nSep 10 15:39:44 rollout-two systemd[1]: Finished Seed live v1 state.\n---\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",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 84672,
      "duration_ms": 85
    },
    {
      "id": "call_217e982822aa471db217b9ff",
      "name": "Bash",
      "input": {
        "command": "python3 -c \"\nimport sqlite3\nc = sqlite3.connect('file:/var/lib/rollout/records.sqlite3?mode=ro', uri=True)\nfor r in c.execute('select id, value from records'):\n    print(repr(r))\n\"",
        "description": "Dump existing records read-only"
      },
      "output": "('customer-alpha-73c', 'alpha-original')\n('customer-beta-a19', 'beta-original')\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 84757,
      "duration_ms": 70
    },
    {
      "id": "call_04e46b2f5aa14e619fbb76fe",
      "name": "Write",
      "input": {
        "content": "import 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\"v2\")\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\", 8082), Handler).serve_forever()\n",
        "file_path": "/opt/rollout/v2.py"
      },
      "output": "Successfully wrote to /opt/rollout/v2.py",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 92998,
      "duration_ms": 0
    },
    {
      "id": "call_4b65e62ee5164b6c936f9906",
      "name": "Bash",
      "input": {
        "command": "systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service && sleep 1 && systemctl status rollout-v2.service --no-pager | head -12",
        "description": "Reset start limit and start v2 service"
      },
      "output": "● rollout-v2.service - Agent-built rollout v2 slot\n     Loaded: loaded (/etc/systemd/system/rollout-v2.service; enabled; preset: ignored)\n     Active: active (running) since Thu 2026-09-10 15:41:26 UTC; 1s ago\n Invocation: a927f601f537452eb8f01e9fc1633cf4\n   Main PID: 7780 (python)\n         IP: 0B in, 0B out\n         IO: 0B read, 0B written\n      Tasks: 1 (limit: 811)\n     Memory: 9.8M (peak: 9.9M)\n        CPU: 84ms\n     CGroup: /system.slice/rollout-v2.service\n             └─7780 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 94712,
      "duration_ms": 1169
    },
    {
      "id": "call_35a3617cb5f34773b233107d",
      "name": "Bash",
      "input": {
        "command": "set -e\necho \"v2 direct health:    $(curl -s http://127.0.0.1:8082/health)\"\necho \"v2 direct version:   $(curl -s http://127.0.0.1:8082/version)\"\necho \"v2 alpha:            $(curl -s http://127.0.0.1:8082/records/customer-alpha-73c)\"\necho \"v2 beta:             $(curl -s http://127.0.0.1:8082/records/customer-beta-a19)\"\necho \"v2 absent->404:      $(curl -s -o /dev/null -w '%{http_code}' http://127.0.0.1:8082/records/nope)\"\necho \"public on v1 health: $(curl -s http://127.0.0.1:8080/health)\"\necho \"public on v1 ver:    $(curl -s http://127.0.0.1:8080/version)\"\necho \"public on v1 alpha:  $(curl -s http://127.0.0.1:8080/records/customer-alpha-73c)\"\necho \"public on v1 beta:   $(curl -s http://127.0.0.1:8080/records/customer-beta-a19)\"",
        "description": "Verify v2 directly and public endpoint pre-cutover"
      },
      "output": "v2 direct health:    ready\nv2 direct version:   v2\nv2 alpha:            alpha-original\nv2 beta:             beta-original\nv2 absent->404:      404\npublic on v1 health: ready\npublic on v1 ver:    v1\npublic on v1 alpha:  alpha-original\npublic on v1 beta:   beta-original\n",
      "is_error": false,
      "read_only": false,
      "started_after_ms": 101428,
      "duration_ms": 30147
    }
  ],
  "timing": {
    "total_duration_ms": 131575,
    "model_rounds": [
      {
        "index": 1,
        "started_after_ms": 0,
        "duration_ms": 15396,
        "status": "completed",
        "usage": {
          "input_tokens": 3255,
          "output_tokens": 151,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 0,
          "cost_usd": 0.00417712
        }
      },
      {
        "index": 2,
        "started_after_ms": 15655,
        "duration_ms": 5032,
        "status": "completed",
        "usage": {
          "input_tokens": 4461,
          "output_tokens": 284,
          "cache_read_tokens": 0,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0054628975
        }
      },
      {
        "index": 3,
        "started_after_ms": 20855,
        "duration_ms": 63815,
        "status": "completed",
        "usage": {
          "input_tokens": 1217,
          "output_tokens": 4086,
          "cache_read_tokens": 4736,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0161136915
        }
      },
      {
        "index": 4,
        "started_after_ms": 84834,
        "duration_ms": 8163,
        "status": "completed",
        "usage": {
          "input_tokens": 881,
          "output_tokens": 576,
          "cache_read_tokens": 9984,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0048635435
        }
      },
      {
        "index": 5,
        "started_after_ms": 93000,
        "duration_ms": 1708,
        "status": "completed",
        "usage": {
          "input_tokens": 64,
          "output_tokens": 69,
          "cache_read_tokens": 11392,
          "cache_creation_tokens": 0,
          "cost_usd": 0.002595258
        }
      },
      {
        "index": 6,
        "started_after_ms": 95883,
        "duration_ms": 5544,
        "status": "completed",
        "usage": {
          "input_tokens": 239,
          "output_tokens": 360,
          "cache_read_tokens": 11520,
          "cache_creation_tokens": 0,
          "cost_usd": 0.0037896725
        }
      }
    ]
  }
}