{ "schema_version": 2, "model": "z-ai/glm-5.2", "outcome": { "status": "completed", "result": "Now I understand the setup. `/opt/rollout/v2.py` doesn't exist (that's why v2 failed). The DB already has the records table and customer data. Let me write v2, matching v1's style.Now reset the failed state and start v2:v2 is running. Now verify it directly on 8082 before switching traffic:v2 is fully ready and serving all existing records. Now verify the public endpoint is currently on v1 (baseline), then atomically switch upstream:Upstream switched atomically. Now verify the public endpoint serves v2 with health, version, and all existing records:Public endpoint is fully on v2. Now verify durability — v2 service restart and full host reboot survival:Now verify reboot survival setup — all three services must be enabled and the upstream file + DB persist:Rollout complete. v2 is live on the public endpoint with zero downtime.\n\n## Summary\n\n**What was wrong:** The `rollout-v2.service` slot existed but `/opt/rollout/v2.py` was missing, so v2 was stuck in `start-limit-hit` failure. The proxy was still forwarding to v1 on port 8081.\n\n**What I did:**\n1. **Implemented v2** at `/opt/rollout/v2.py` — modeled on v1's code, listening on `127.0.0.1:8082`, reading/writing the same `/var/lib/rollout/records.sqlite3` (so existing customer records are preserved), with `/health`→`ready`, `/version`→`v2`, and `PUT`/`GET /records/` per contract.\n2. **Brought v2 up cleanly:** `systemctl reset-failed` then `start` — v2 went active.\n3. **Verified v2 directly on 8082** before touching traffic: health, version, both existing records, and 404 on missing — all correct.\n4. **Atomic cutover:** `printf '8082' > upstream.tmp && mv upstream.tmp upstream`. The proxy reads `/var/lib/rollout/upstream` per request, so the very next request after the rename hit v2. No proxy restart, no v1 restart — both forbidden and unnecessary.\n5. **Verified the public endpoint** post-switch: health `ready`, version `v2`, existing records intact, PUT+GET round-trip working.\n6. **Survival checks:**\n - **v2 restart:** `systemctl restart rollout-v2.service` → recovered, all records still served (DB-backed, `Restart=always`).\n - **Reboot survival:** all three units are `enabled`; `upstream` file (`8082`), the sqlite DB, and `/opt/rollout/v2.py` are all on persistent storage, so they survive a full host reboot without agent help.\n\n**Constraints honored:** proxy and v1 were never stopped or restarted; no request failed during cutover (baseline v1 was healthy, v2 was verified healthy before the swap, and the swap was a single atomic rename); records were preserved throughout.\n\n**Current state:** `rollout-v2.service` active and enabled, `rollout-proxy.service` active and enabled, upstream pinned to `8082`." }, "usage": { "input_tokens": 76193, "output_tokens": 3044, "cache_read_tokens": 63916, "cache_creation_tokens": 0, "cost_usd": 0.017467155999999998 }, "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/`: store the UTF-8 request body and return `204`;\n- `GET /records/`: 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 current state of the system to understand what's already", "details": [ { "format": "unknown", "index": 0, "text": "Let", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " me start by exploring the current", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " state of the system to understand", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " what's already", "type": "reasoning.text" } ] }, { "type": "tool_use", "id": "8464ae4b-5e92-483c-a514-552655127d17", "name": "Bash", "input": { "command": "systemctl --version 2>&1 | head -1; echo \"---\"; uname -a", "description": "Check systemd and kernel version" } }, { "type": "tool_use", "id": "14b7b09b-1596-471c-815d-ca6698067db2", "name": "Bash", "input": { "command": "ls -la /opt/rollout/ 2>&1; echo \"---\"; ls -la /var/lib/rollout/ 2>&1", "description": "List rollout directories" } }, { "type": "tool_use", "id": "6e6db95f-3f9f-46f4-8a54-5d8bb80123b1", "name": "Bash", "input": { "command": "systemctl list-units --all 'rollout-*' 2>&1; echo \"---STATUS---\"; systemctl status rollout-proxy.service rollout-v1.service rollout-v2.service 2>&1 | head -50", "description": "List rollout service units" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "8464ae4b-5e92-483c-a514-552655127d17", "content": "systemd 261 (261.1)\n---\nLinux rollout-three 6.18.44 #1-NixOS SMP PREEMPT_DYNAMIC Sun Aug 9 18:25:30 UTC 2026 x86_64 GNU/Linux\n" }, { "type": "tool_result", "tool_use_id": "14b7b09b-1596-471c-815d-ca6698067db2", "content": "total 8\ndrwxr-xr-x 2 root root 4096 Aug 15 00:44 .\ndrwxr-xr-x 3 root root 4096 Aug 15 00:44 ..\n---\ntotal 24\ndrwxr-xr-x 2 root root 4096 Aug 15 00:44 .\ndrwxr-xr-x 9 root root 4096 Aug 15 00:44 ..\n-rw-r--r-- 1 root root 12288 Aug 15 00:44 records.sqlite3\n-rw-r--r-- 1 root root 5 Aug 15 00:44 upstream\n" }, { "type": "tool_result", "tool_use_id": "6e6db95f-3f9f-46f4-8a54-5d8bb80123b1", "content": " UNIT LOAD ACTIVE SUB DESCRIPTION\n rollout-proxy.service loaded active running Stable public rollout proxy\n rollout-seed.service loaded active exited Seed live v1 state\n rollout-v1.service loaded active running Existing rollout v1 service\n● rollout-v2.service loaded failed failed Agent-built rollout v2 slot\n\nLegend: LOAD → Reflects whether the unit definition was properly loaded.\n ACTIVE → The high-level unit activation state, i.e. generalization of SUB.\n SUB → The low-level unit activation state, values depend on unit type.\n\n4 loaded units listed.\nTo show all installed unit files use 'systemctl list-unit-files'.\n---STATUS---\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 Sat 2026-08-15 00:44:19 UTC; 7s ago\n Invocation: c28df9e8388046c6a0ce8da29265f5f0\n Main PID: 559 (python)\n IP: 131.9K in, 130.7K out\n IO: 0B read, 0B written\n Tasks: 2 (limit: 811)\n Memory: 14.5M (peak: 14.5M)\n CPU: 352ms\n CGroup: /system.slice/rollout-proxy.service\n └─559 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nAug 15 00:44:19 rollout-three systemd[1]: Started Stable public rollout proxy.\n\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 Sat 2026-08-15 00:44:19 UTC; 7s ago\n Invocation: 999af38d047a47928d55e319da7ecf8b\n Main PID: 558 (python)\n IP: 79.4K in, 77.9K out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 13.8M (peak: 14.1M)\n CPU: 404ms\n CGroup: /system.slice/rollout-v1.service\n └─558 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nAug 15 00:44:19 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 Sat 2026-08-15 00:44:25 UTC; 883ms ago\n Duration: 136ms\n Invocation: 012a81bdb9f14eea9f0f9d54396d429a\n Process: 847 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n Main PID: 847 (code=exited, status=2)\n IP: 0B in, 0B out\n IO: 0B read, 0B written\n Mem peak: 4.3M\n CPU: 46ms\n\nAug 15 00:44:25 rollout-three systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nAug 15 00:44:25 rollout-three systemd[1]: rollout-v2.service: Start request repeated too quickly.\nAug 15 00:44:25 rollout-three systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nAug 15 00:44:25 rollout-three systemd[1]: Failed to start Agent-built rollout v2 slot.\n" } ] }, { "role": "assistant", "content": [ { "type": "tool_use", "id": "call_3b94268c687c40aeadd32def", "name": "Bash", "input": { "command": "cat /etc/systemd/system/rollout-v2.service; echo \"---V1 UNIT---\"; cat /etc/systemd/system/rollout-v1.service; echo \"---PROXY UNIT---\"; cat /etc/systemd/system/rollout-proxy.service", "description": "Read unit definitions" } }, { "type": "tool_use", "id": "call_d61bdcd5a02f4c4db09e6601", "name": "Bash", "input": { "command": "cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py; echo \"===V1===\"; cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py", "description": "Read proxy and v1 source" } }, { "type": "tool_use", "id": "call_74d530e7472a485bbe57955c", "name": "Bash", "input": { "command": "cat /opt/rollout/v2.py 2>&1; echo \"---UPSTREAM---\"; cat /var/lib/rollout/upstream; echo \"---RECORDS---\"; sqlite3 /var/lib/rollout/records.sqlite3 '.schema' 2>&1; echo \"---DATA---\"; sqlite3 /var/lib/rollout/records.sqlite3 'SELECT * FROM records;' 2>&1 | head -50", "description": "Inspect v2 stub, upstream, records DB" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_3b94268c687c40aeadd32def", "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---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---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" }, { "type": "tool_result", "tool_use_id": "call_d61bdcd5a02f4c4db09e6601", "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===V1===\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_74d530e7472a485bbe57955c", "content": "cat: /opt/rollout/v2.py: No such file or directory\n---UPSTREAM---\n8081\n---RECORDS---\nCREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL);\n---DATA---\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\n" } ] }, { "role": "assistant", "content": [ { "type": "reasoning", "text": "The\n v2 slot exists as a unit but `/opt/rollout/v2.py` doesn't exist. The unit is in failed state due to start-limit-hit. Let me plan:\n\n1. Write `/opt/rollout/v2.py` - v2 implementation listening on 127.0.0.1:8082, using the same DB, with /health, /version, /records endpoints.\n\n2. Reset the failed state and start v2.\n\n3. Verify v2 is healthy directly.\n\n4. Atomically swap upstream from 8081 to 8082.\n\n5. Verify public endpoint serves correctly.\n\n6. Ensure durability: v2 must survive restart and reboot — it's enabled, Restart=always. Records are in the sqlite DB (persistent file). \n\nLet me write v2.py modeled on v1 but with v2 version string. I'll write to the same DB so records are preserved (they already are there). \n\nImportant: the proxy reads upstream for every request and forwards. v2 must listen on 127.0.0.1:8082. \n\nLet me create v2.py. I'll match v1's style closely.\n\nNeed to reset start-limit before starting: `systemctl reset-failed rollout-v2.service` then start.\n\nLet me also make sure /opt/rollout exists (it does).\n\nLet me write the file.", "details": [ { "format": "unknown", "index": 0, "text": "The", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2 slot", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " exists", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " as", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " a unit but `/", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "opt/rollout", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "/v2.py`", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " doesn't exist.", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " The", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " unit is in", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " failed state", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " due", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " to start-limit", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "-hit. Let", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " me plan", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ":\n\n1. Write", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " `/opt/roll", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "out/v2.py", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "` - v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2 implementation", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " listening", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " on 127.", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "0.0.", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "1:808", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2, using the", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " same DB", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ", with /", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "health, /version", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ", /records endpoints", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".\n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2. Reset the", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " failed state and start", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " v2.\n\n3", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ". Verify v2", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " is healthy", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " directly", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".\n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "4. Atom", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "ically swap", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " upstream", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " from", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " 8081", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " to 808", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2.\n\n5.", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " Verify public endpoint serves", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " correctly", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".\n\n6. Ensure", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " durability", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ": v2 must", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " survive", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " restart and", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " reboot —", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " it's enabled,", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " Restart", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "=always.", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " Records", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " are", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " in the", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " sqlite", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " DB (", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "persistent", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " file", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "). \n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "Let me write", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2.py modeled", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " on v1 but", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " with v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2 version", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " string", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " I", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "'ll", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " write", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " to", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " the", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " same DB so", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " records are preserved (", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "they", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " already are there", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "). \n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "Important", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ": the proxy reads", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " upstream", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " for", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " every request and", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " forwards", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ". v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2 must listen", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " on 127", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".0.0", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".1:80", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "82.", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " \n\nLet me create", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "2.py. I", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "'ll", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " match", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " v", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "1's style closely", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": ".\n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "Need", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " to reset start", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "-limit before", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " starting:", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " `systemctl reset", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "-failed rollout", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "-v2.service`", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " then start.\n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "Let", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " me also", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " make sure /", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "opt/rollout", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " exists (", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "it does).\n\n", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": "Let me write the", "type": "reasoning.text" }, { "format": "unknown", "index": 0, "text": " file.", "type": "reasoning.text" } ] }, { "type": "text", "text": "Now I understand the setup. `/opt/rollout/v2.py` doesn't exist (that's why v2 failed). The DB already has the records table and customer data. Let me write v2, matching v1's style." }, { "type": "tool_use", "id": "call_11f2e6fa72704233a7e3d9d8", "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_11f2e6fa72704233a7e3d9d8", "content": "Successfully wrote to /opt/rollout/v2.py" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "Now reset the failed state and start v2:" }, { "type": "tool_use", "id": "call_f0bca60817e547fa828d408d", "name": "Bash", "input": { "command": "systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service && sleep 1 && systemctl is-active rollout-v2.service && echo \"---\" && systemctl status rollout-v2.service --no-pager 2>&1 | head -20", "description": "Reset and start v2 service" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_f0bca60817e547fa828d408d", "content": "active\n---\n● 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 Sat 2026-08-15 00:44:45 UTC; 1s ago\n Invocation: 8f036e6dc050469eac9f85fd497e0d1e\n Main PID: 2924 (python)\n IP: 0B in, 0B out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 9.6M (peak: 9.9M)\n CPU: 130ms\n CGroup: /system.slice/rollout-v2.service\n └─2924 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\n\nAug 15 00:44:45 rollout-three systemd[1]: Started Agent-built rollout v2 slot.\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "v2 is running. Now verify it directly on 8082 before switching traffic:" }, { "type": "tool_use", "id": "call_1fd9142ce5ff4b33b3a0fcb5", "name": "Bash", "input": { "command": "echo \"=== health ===\"; curl -s -o /tmp/h -w \"%{http_code}\\n\" http://127.0.0.1:8082/health; cat /tmp/h; echo; echo \"=== version ===\"; curl -s -o /tmp/v -w \"%{http_code}\\n\" http://127.0.0.1:8082/version; cat /tmp/v; echo; echo \"=== existing records ===\"; curl -s -w \"\\n[%{http_code}] alpha\\n\" http://127.0.0.1:8082/records/customer-alpha-73c; curl -s -w \"\\n[%{http_code}] beta\\n\" http://127.0.0.1:8082/records/customer-beta-a19; echo \"=== missing record ===\"; curl -s -w \"\\n[%{http_code}] none\\n\" http://127.0.0.1:8082/records/nonexistent", "description": "Verify v2 directly" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_1fd9142ce5ff4b33b3a0fcb5", "content": "=== health ===\n200\nready\n=== version ===\n200\nv2\n=== existing records ===\nalpha-original\n[200] alpha\nbeta-original\n[200] beta\n=== missing record ===\n\n[404] none\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "v2 is fully ready and serving all existing records. Now verify the public endpoint is currently on v1 (baseline), then atomically switch upstream:" }, { "type": "tool_use", "id": "call_4931f6cd5b38481ba783296f", "name": "Bash", "input": { "command": "echo \"=== baseline public version (should be v1) ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/version; echo \"=== atomic switch ===\"; printf '8082' > /var/lib/rollout/upstream.tmp && mv /var/lib/rollout/upstream.tmp /var/lib/rollout/upstream && echo \"switched\"; cat /var/lib/rollout/upstream; echo", "description": "Baseline check then atomic upstream swap" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_4931f6cd5b38481ba783296f", "content": "=== baseline public version (should be v1) ===\nv1 [200]\n=== atomic switch ===\nswitched\n8082\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "Upstream switched atomically. Now verify the public endpoint serves v2 with health, version, and all existing records:" }, { "type": "tool_use", "id": "call_a379ac595e6e4e69a9d7f238", "name": "Bash", "input": { "command": "echo \"=== public health ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/health; echo \"=== public version (should be v2) ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/version; echo \"=== existing records via public ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-alpha-73c; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-beta-a19; echo \"=== missing record ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/missing; echo \"=== PUT new record ===\"; curl -s -X PUT -d 'rollout-test-value' -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/rollout-test; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/rollout-test", "description": "Full public endpoint verification post-switch" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_a379ac595e6e4e69a9d7f238", "content": "=== public health ===\nready [200]\n=== public version (should be v2) ===\nv2 [200]\n=== existing records via public ===\nalpha-original [200]\nbeta-original [200]\n=== missing record ===\n [404]\n=== PUT new record ===\n [204]\nrollout-test-value [200]\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "Public endpoint is fully on v2. Now verify durability — v2 service restart and full host reboot survival:" }, { "type": "tool_use", "id": "call_468ccd34b2954e6ba67c1c66", "name": "Bash", "input": { "command": "echo \"=== restart v2 ===\"; systemctl restart rollout-v2.service && sleep 1 && systemctl is-active rollout-v2.service; echo \"=== public after v2 restart ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/version; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/health; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-alpha-73c; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/rollout-test; echo \"=== clean up test record ===\"; sqlite3 /var/lib/rollout/records.sqlite3 \"DELETE FROM records WHERE id='rollout-test';\" && echo \"removed test record\"", "description": "Restart v2 and verify recovery" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_468ccd34b2954e6ba67c1c66", "content": "=== restart v2 ===\nactive\n=== public after v2 restart ===\nv2 [200]\nready [200]\nalpha-original [200]\nrollout-test-value [200]\n=== clean up test record ===\nremoved test record\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "Now verify reboot survival setup — all three services must be enabled and the upstream file + DB persist:" }, { "type": "tool_use", "id": "call_083e975b3d704f189453ac11", "name": "Bash", "input": { "command": "echo \"=== enabled state ===\"; systemctl is-enabled rollout-proxy.service rollout-v1.service rollout-v2.service; echo \"=== persistent files ===\"; ls -la /var/lib/rollout/upstream /var/lib/rollout/records.sqlite3 /opt/rollout/v2.py; cat /var/lib/rollout/upstream; echo; echo \"=== records after cleanup ===\"; sqlite3 /var/lib/rollout/records.sqlite3 'SELECT * FROM records;'; echo \"=== final full check ===\"; curl -s -w \" health[%{http_code}]\\n\" http://127.0.0.1:8080/health; curl -s -w \" version[%{http_code}]\\n\" http://127.0.0.1:8080/version; curl -s -w \" alpha[%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-alpha-73c; curl -s -w \" beta[%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-beta-a19", "description": "Final durability and state verification" } } ] }, { "role": "user", "content": [ { "type": "tool_result", "tool_use_id": "call_083e975b3d704f189453ac11", "content": "=== enabled state ===\nenabled\nenabled\nenabled\n=== persistent files ===\n-rw-r--r-- 1 root root 1745 Aug 15 00:44 /opt/rollout/v2.py\n-rw-r--r-- 1 root root 12288 Aug 15 00:45 /var/lib/rollout/records.sqlite3\n-rw-r--r-- 1 root root 4 Aug 15 00:44 /var/lib/rollout/upstream\n8082\n=== records after cleanup ===\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\n=== final full check ===\nready health[200]\nv2 version[200]\nalpha-original alpha[200]\nbeta-original beta[200]\n" } ] }, { "role": "assistant", "content": [ { "type": "text", "text": "Rollout complete. v2 is live on the public endpoint with zero downtime.\n\n## Summary\n\n**What was wrong:** The `rollout-v2.service` slot existed but `/opt/rollout/v2.py` was missing, so v2 was stuck in `start-limit-hit` failure. The proxy was still forwarding to v1 on port 8081.\n\n**What I did:**\n1. **Implemented v2** at `/opt/rollout/v2.py` — modeled on v1's code, listening on `127.0.0.1:8082`, reading/writing the same `/var/lib/rollout/records.sqlite3` (so existing customer records are preserved), with `/health`→`ready`, `/version`→`v2`, and `PUT`/`GET /records/` per contract.\n2. **Brought v2 up cleanly:** `systemctl reset-failed` then `start` — v2 went active.\n3. **Verified v2 directly on 8082** before touching traffic: health, version, both existing records, and 404 on missing — all correct.\n4. **Atomic cutover:** `printf '8082' > upstream.tmp && mv upstream.tmp upstream`. The proxy reads `/var/lib/rollout/upstream` per request, so the very next request after the rename hit v2. No proxy restart, no v1 restart — both forbidden and unnecessary.\n5. **Verified the public endpoint** post-switch: health `ready`, version `v2`, existing records intact, PUT+GET round-trip working.\n6. **Survival checks:**\n - **v2 restart:** `systemctl restart rollout-v2.service` → recovered, all records still served (DB-backed, `Restart=always`).\n - **Reboot survival:** all three units are `enabled`; `upstream` file (`8082`), the sqlite DB, and `/opt/rollout/v2.py` are all on persistent storage, so they survive a full host reboot without agent help.\n\n**Constraints honored:** proxy and v1 were never stopped or restarted; no request failed during cutover (baseline v1 was healthy, v2 was verified healthy before the swap, and the swap was a single atomic rename); records were preserved throughout.\n\n**Current state:** `rollout-v2.service` active and enabled, `rollout-proxy.service` active and enabled, upstream pinned to `8082`." } ] } ], "tool_trace": [ { "id": "8464ae4b-5e92-483c-a514-552655127d17", "name": "Bash", "input": { "command": "systemctl --version 2>&1 | head -1; echo \"---\"; uname -a", "description": "Check systemd and kernel version" }, "output": "systemd 261 (261.1)\n---\nLinux rollout-three 6.18.44 #1-NixOS SMP PREEMPT_DYNAMIC Sun Aug 9 18:25:30 UTC 2026 x86_64 GNU/Linux\n", "is_error": false, "read_only": false, "started_after_ms": 1701, "duration_ms": 44 }, { "id": "14b7b09b-1596-471c-815d-ca6698067db2", "name": "Bash", "input": { "command": "ls -la /opt/rollout/ 2>&1; echo \"---\"; ls -la /var/lib/rollout/ 2>&1", "description": "List rollout directories" }, "output": "total 8\ndrwxr-xr-x 2 root root 4096 Aug 15 00:44 .\ndrwxr-xr-x 3 root root 4096 Aug 15 00:44 ..\n---\ntotal 24\ndrwxr-xr-x 2 root root 4096 Aug 15 00:44 .\ndrwxr-xr-x 9 root root 4096 Aug 15 00:44 ..\n-rw-r--r-- 1 root root 12288 Aug 15 00:44 records.sqlite3\n-rw-r--r-- 1 root root 5 Aug 15 00:44 upstream\n", "is_error": false, "read_only": false, "started_after_ms": 1745, "duration_ms": 35 }, { "id": "6e6db95f-3f9f-46f4-8a54-5d8bb80123b1", "name": "Bash", "input": { "command": "systemctl list-units --all 'rollout-*' 2>&1; echo \"---STATUS---\"; systemctl status rollout-proxy.service rollout-v1.service rollout-v2.service 2>&1 | head -50", "description": "List rollout service units" }, "output": " UNIT LOAD ACTIVE SUB DESCRIPTION\n rollout-proxy.service loaded active running Stable public rollout proxy\n rollout-seed.service loaded active exited Seed live v1 state\n rollout-v1.service loaded active running Existing rollout v1 service\n● rollout-v2.service loaded failed failed Agent-built rollout v2 slot\n\nLegend: LOAD → Reflects whether the unit definition was properly loaded.\n ACTIVE → The high-level unit activation state, i.e. generalization of SUB.\n SUB → The low-level unit activation state, values depend on unit type.\n\n4 loaded units listed.\nTo show all installed unit files use 'systemctl list-unit-files'.\n---STATUS---\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 Sat 2026-08-15 00:44:19 UTC; 7s ago\n Invocation: c28df9e8388046c6a0ce8da29265f5f0\n Main PID: 559 (python)\n IP: 131.9K in, 130.7K out\n IO: 0B read, 0B written\n Tasks: 2 (limit: 811)\n Memory: 14.5M (peak: 14.5M)\n CPU: 352ms\n CGroup: /system.slice/rollout-proxy.service\n └─559 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py\n\nAug 15 00:44:19 rollout-three systemd[1]: Started Stable public rollout proxy.\n\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 Sat 2026-08-15 00:44:19 UTC; 7s ago\n Invocation: 999af38d047a47928d55e319da7ecf8b\n Main PID: 558 (python)\n IP: 79.4K in, 77.9K out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 13.8M (peak: 14.1M)\n CPU: 404ms\n CGroup: /system.slice/rollout-v1.service\n └─558 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py\n\nAug 15 00:44:19 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 Sat 2026-08-15 00:44:25 UTC; 883ms ago\n Duration: 136ms\n Invocation: 012a81bdb9f14eea9f0f9d54396d429a\n Process: 847 ExecStart=/nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py (code=exited, status=2)\n Main PID: 847 (code=exited, status=2)\n IP: 0B in, 0B out\n IO: 0B read, 0B written\n Mem peak: 4.3M\n CPU: 46ms\n\nAug 15 00:44:25 rollout-three systemd[1]: rollout-v2.service: Scheduled restart job, restart counter is at 5.\nAug 15 00:44:25 rollout-three systemd[1]: rollout-v2.service: Start request repeated too quickly.\nAug 15 00:44:25 rollout-three systemd[1]: rollout-v2.service: Failed with result 'start-limit-hit'.\nAug 15 00:44:25 rollout-three systemd[1]: Failed to start Agent-built rollout v2 slot.\n", "is_error": false, "read_only": false, "started_after_ms": 1781, "duration_ms": 86 }, { "id": "call_3b94268c687c40aeadd32def", "name": "Bash", "input": { "command": "cat /etc/systemd/system/rollout-v2.service; echo \"---V1 UNIT---\"; cat /etc/systemd/system/rollout-v1.service; echo \"---PROXY UNIT---\"; cat /etc/systemd/system/rollout-proxy.service", "description": "Read unit definitions" }, "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---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---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": 7138, "duration_ms": 34 }, { "id": "call_d61bdcd5a02f4c4db09e6601", "name": "Bash", "input": { "command": "cat /nix/store/08ib8hkpsxizx3zrsv266idphl0r1hgb-rollout-proxy.py; echo \"===V1===\"; cat /nix/store/13qi755lbgrlrh6c5jqjdlpf1f7nvffv-rollout-v1.py", "description": "Read proxy and v1 source" }, "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===V1===\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": 7172, "duration_ms": 24 }, { "id": "call_74d530e7472a485bbe57955c", "name": "Bash", "input": { "command": "cat /opt/rollout/v2.py 2>&1; echo \"---UPSTREAM---\"; cat /var/lib/rollout/upstream; echo \"---RECORDS---\"; sqlite3 /var/lib/rollout/records.sqlite3 '.schema' 2>&1; echo \"---DATA---\"; sqlite3 /var/lib/rollout/records.sqlite3 'SELECT * FROM records;' 2>&1 | head -50", "description": "Inspect v2 stub, upstream, records DB" }, "output": "cat: /opt/rollout/v2.py: No such file or directory\n---UPSTREAM---\n8081\n---RECORDS---\nCREATE TABLE records (id TEXT PRIMARY KEY, value TEXT NOT NULL);\n---DATA---\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\n", "is_error": false, "read_only": false, "started_after_ms": 7197, "duration_ms": 46 }, { "id": "call_11f2e6fa72704233a7e3d9d8", "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": 18197, "duration_ms": 0 }, { "id": "call_f0bca60817e547fa828d408d", "name": "Bash", "input": { "command": "systemctl reset-failed rollout-v2.service && systemctl start rollout-v2.service && sleep 1 && systemctl is-active rollout-v2.service && echo \"---\" && systemctl status rollout-v2.service --no-pager 2>&1 | head -20", "description": "Reset and start v2 service" }, "output": "active\n---\n● 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 Sat 2026-08-15 00:44:45 UTC; 1s ago\n Invocation: 8f036e6dc050469eac9f85fd497e0d1e\n Main PID: 2924 (python)\n IP: 0B in, 0B out\n IO: 0B read, 0B written\n Tasks: 1 (limit: 811)\n Memory: 9.6M (peak: 9.9M)\n CPU: 130ms\n CGroup: /system.slice/rollout-v2.service\n └─2924 /nix/store/3n4qphl9s728sz8frmpqqrv9b1m87g68-python3-3.14.7/bin/python /opt/rollout/v2.py\n\nAug 15 00:44:45 rollout-three systemd[1]: Started Agent-built rollout v2 slot.\n", "is_error": false, "read_only": false, "started_after_ms": 20655, "duration_ms": 1074 }, { "id": "call_1fd9142ce5ff4b33b3a0fcb5", "name": "Bash", "input": { "command": "echo \"=== health ===\"; curl -s -o /tmp/h -w \"%{http_code}\\n\" http://127.0.0.1:8082/health; cat /tmp/h; echo; echo \"=== version ===\"; curl -s -o /tmp/v -w \"%{http_code}\\n\" http://127.0.0.1:8082/version; cat /tmp/v; echo; echo \"=== existing records ===\"; curl -s -w \"\\n[%{http_code}] alpha\\n\" http://127.0.0.1:8082/records/customer-alpha-73c; curl -s -w \"\\n[%{http_code}] beta\\n\" http://127.0.0.1:8082/records/customer-beta-a19; echo \"=== missing record ===\"; curl -s -w \"\\n[%{http_code}] none\\n\" http://127.0.0.1:8082/records/nonexistent", "description": "Verify v2 directly" }, "output": "=== health ===\n200\nready\n=== version ===\n200\nv2\n=== existing records ===\nalpha-original\n[200] alpha\nbeta-original\n[200] beta\n=== missing record ===\n\n[404] none\n", "is_error": false, "read_only": false, "started_after_ms": 26375, "duration_ms": 134 }, { "id": "call_4931f6cd5b38481ba783296f", "name": "Bash", "input": { "command": "echo \"=== baseline public version (should be v1) ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/version; echo \"=== atomic switch ===\"; printf '8082' > /var/lib/rollout/upstream.tmp && mv /var/lib/rollout/upstream.tmp /var/lib/rollout/upstream && echo \"switched\"; cat /var/lib/rollout/upstream; echo", "description": "Baseline check then atomic upstream swap" }, "output": "=== baseline public version (should be v1) ===\nv1 [200]\n=== atomic switch ===\nswitched\n8082\n", "is_error": false, "read_only": false, "started_after_ms": 30286, "duration_ms": 64 }, { "id": "call_a379ac595e6e4e69a9d7f238", "name": "Bash", "input": { "command": "echo \"=== public health ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/health; echo \"=== public version (should be v2) ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/version; echo \"=== existing records via public ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-alpha-73c; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-beta-a19; echo \"=== missing record ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/missing; echo \"=== PUT new record ===\"; curl -s -X PUT -d 'rollout-test-value' -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/rollout-test; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/rollout-test", "description": "Full public endpoint verification post-switch" }, "output": "=== public health ===\nready [200]\n=== public version (should be v2) ===\nv2 [200]\n=== existing records via public ===\nalpha-original [200]\nbeta-original [200]\n=== missing record ===\n [404]\n=== PUT new record ===\n [204]\nrollout-test-value [200]\n", "is_error": false, "read_only": false, "started_after_ms": 35826, "duration_ms": 187 }, { "id": "call_468ccd34b2954e6ba67c1c66", "name": "Bash", "input": { "command": "echo \"=== restart v2 ===\"; systemctl restart rollout-v2.service && sleep 1 && systemctl is-active rollout-v2.service; echo \"=== public after v2 restart ===\"; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/version; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/health; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-alpha-73c; curl -s -w \" [%{http_code}]\\n\" http://127.0.0.1:8080/records/rollout-test; echo \"=== clean up test record ===\"; sqlite3 /var/lib/rollout/records.sqlite3 \"DELETE FROM records WHERE id='rollout-test';\" && echo \"removed test record\"", "description": "Restart v2 and verify recovery" }, "output": "=== restart v2 ===\nactive\n=== public after v2 restart ===\nv2 [200]\nready [200]\nalpha-original [200]\nrollout-test-value [200]\n=== clean up test record ===\nremoved test record\n", "is_error": false, "read_only": false, "started_after_ms": 40658, "duration_ms": 1145 }, { "id": "call_083e975b3d704f189453ac11", "name": "Bash", "input": { "command": "echo \"=== enabled state ===\"; systemctl is-enabled rollout-proxy.service rollout-v1.service rollout-v2.service; echo \"=== persistent files ===\"; ls -la /var/lib/rollout/upstream /var/lib/rollout/records.sqlite3 /opt/rollout/v2.py; cat /var/lib/rollout/upstream; echo; echo \"=== records after cleanup ===\"; sqlite3 /var/lib/rollout/records.sqlite3 'SELECT * FROM records;'; echo \"=== final full check ===\"; curl -s -w \" health[%{http_code}]\\n\" http://127.0.0.1:8080/health; curl -s -w \" version[%{http_code}]\\n\" http://127.0.0.1:8080/version; curl -s -w \" alpha[%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-alpha-73c; curl -s -w \" beta[%{http_code}]\\n\" http://127.0.0.1:8080/records/customer-beta-a19", "description": "Final durability and state verification" }, "output": "=== enabled state ===\nenabled\nenabled\nenabled\n=== persistent files ===\n-rw-r--r-- 1 root root 1745 Aug 15 00:44 /opt/rollout/v2.py\n-rw-r--r-- 1 root root 12288 Aug 15 00:45 /var/lib/rollout/records.sqlite3\n-rw-r--r-- 1 root root 4 Aug 15 00:44 /var/lib/rollout/upstream\n8082\n=== records after cleanup ===\ncustomer-alpha-73c|alpha-original\ncustomer-beta-a19|beta-original\n=== final full check ===\nready health[200]\nv2 version[200]\nalpha-original alpha[200]\nbeta-original beta[200]\n", "is_error": false, "read_only": false, "started_after_ms": 46387, "duration_ms": 144 } ], "timing": { "total_duration_ms": 56120, "model_rounds": [ { "index": 1, "started_after_ms": 0, "duration_ms": 1700, "status": "completed", "usage": { "input_tokens": 2961, "output_tokens": 168, "cache_read_tokens": 0, "cache_creation_tokens": 0, "cost_usd": 0.00265692 } }, { "index": 2, "started_after_ms": 1869, "duration_ms": 5268, "status": "completed", "usage": { "input_tokens": 4364, "output_tokens": 273, "cache_read_tokens": 3840, "cache_creation_tokens": 0, "cost_usd": 0.00102662 } }, { "index": 3, "started_after_ms": 7243, "duration_ms": 10953, "status": "completed", "usage": { "input_tokens": 7041, "output_tokens": 747, "cache_read_tokens": 6196, "cache_creation_tokens": 0, "cost_usd": 0.002128266 } }, { "index": 4, "started_after_ms": 18197, "duration_ms": 2456, "status": "completed", "usage": { "input_tokens": 7895, "output_tokens": 83, "cache_read_tokens": 6868, "cache_creation_tokens": 0, "cost_usd": 0.001256038 } }, { "index": 5, "started_after_ms": 21730, "duration_ms": 4644, "status": "completed", "usage": { "input_tokens": 8241, "output_tokens": 246, "cache_read_tokens": 7169, "cache_creation_tokens": 0, "cost_usd": 0.001556499 } }, { "index": 6, "started_after_ms": 26509, "duration_ms": 3776, "status": "completed", "usage": { "input_tokens": 8540, "output_tokens": 154, "cache_read_tokens": 7515, "cache_creation_tokens": 0, "cost_usd": 0.001423275 } }, { "index": 7, "started_after_ms": 30351, "duration_ms": 5461, "status": "completed", "usage": { "input_tokens": 8727, "output_tokens": 328, "cache_read_tokens": 7679, "cache_creation_tokens": 0, "cost_usd": 0.001717429 } }, { "index": 8, "started_after_ms": 36014, "duration_ms": 4643, "status": "completed", "usage": { "input_tokens": 9126, "output_tokens": 249, "cache_read_tokens": 7757, "cache_creation_tokens": 0, "cost_usd": 0.001760157 } }, { "index": 9, "started_after_ms": 41804, "duration_ms": 4583, "status": "completed", "usage": { "input_tokens": 9427, "output_tokens": 278, "cache_read_tokens": 8107, "cache_creation_tokens": 0, "cost_usd": 0.001812657 } }, { "index": 10, "started_after_ms": 46532, "duration_ms": 9586, "status": "completed", "usage": { "input_tokens": 9871, "output_tokens": 518, "cache_read_tokens": 8785, "cache_creation_tokens": 0, "cost_usd": 0.002129295 } } ] } }