{
  "checker": {
    "details": {
      "argv": [
        "<host-path>",
        "run",
        "python",
        "-m",
        "examples",
        "trades"
      ],
      "kind": "cli",
      "needs_browser": false,
      "needs_credentials": false,
      "returncode": 0,
      "scope": "product operation",
      "stderr": "",
      "stdout": "[  broker] ws://127.0.0.1:8765/trades  (durable, next offset 12)\n[consumer] [one] connected at offset 12, live\n[producer] publishing live_trades_btcusd to ws://127.0.0.1:8765/trades\n[consumer] \n[consumer] stopped; the cursor is saved \u2014 start again to resume\n[  broker] Traceback (most recent call last):\n[  broker]   File \"<frozen runpy>\", line 198, in _run_module_as_main\n[  broker]   File \"<frozen runpy>\", line 88, in _run_code\n[  broker]   File \"<host-path>\", line 43, in <module>\n[  broker]     raise SystemExit(main())\n[  broker]                      ^^^^^^\n[  broker]   File \"<host-path>\", line 26, in main\n[excerpt truncated]",
      "working": true
    },
    "status": "PASS"
  },
  "deviations": [
    "`just` was not installed, so the Justfile recipes were run as their underlying commands: `uv run python -m examples trades` instead of `just demo trades`.",
    "`uv run pre-commit install` (the git-hook part of `just bootstrap`) was skipped: the workspace is not a git repository.",
    "Ran `uv sync` with PATH including ~/.local/bin; the checker probe uses the absolute path <host-path>"
  ],
  "main_blocker": null,
  "operation": "Ran the README's start-here demo `just demo trades` (equivalent `uv run python -m examples trades`): broker on ws://127.0.0.1:8765/trades with a log, a producer streaming live Bitstamp BTC/USD trades, and a consumer receiving live rows with offsets.",
  "operation_scope": "Live trades require outbound access to Bitstamp's public websocket, which worked in this guest. Not exercised: replay after restart (consumer demo), the fastapi/book/otel demos, and the test suite (intentionally skipped per task).",
  "outcome": "working",
  "steps": [
    "Read README.md and Justfile (dev setup: `just bootstrap` = `uv sync` + pre-commit hook install)",
    "Installed uv 0.13.1 via https://astral.sh/uv/install.sh",
    "uv sync in <host-path> (succeeded)",
    "uv run python -m examples (lists demos)",
    "uv run python -m examples trades, run under 60s timeout: broker, producer and consumer all ran; consumer received live trades at offsets 1-11"
  ],
  "stuck_step": null,
  "suggested_fix": null
}