{
  "checker": {
    "claims": [
      {
        "claim": "On Windows the CLI prints an unsupported message and exits with code 2 before running the demo",
        "command": "'C:\\coldpass\\workspace\\.venv\\Scripts\\daybook.exe' demo --out daybook-demo-claim-checker-771ef2c64d30429fbda985f1b239be71",
        "evidence": "Linux and macOS; Windows is not supported yet\r\n",
        "expected": "exit code 2 and a message naming Linux and macOS",
        "input": "daybook demo --out daybook-demo-claim on Windows",
        "kind": "claim",
        "outcome": "Real input produced the expected result: Linux and macOS",
        "returncode": 2,
        "source": "message and exits with code 2 before importing platform-specific locking code.",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "yes"
      },
      {
        "claim": "Exit code 2 is documented for an unsupported platform",
        "command": "'C:\\coldpass\\workspace\\.venv\\Scripts\\daybook.exe' demo --out daybook-demo-table-checker-6eb67b7c76ac4348808590bba28b6454",
        "evidence": "Linux and macOS; Windows is not supported yet\r\n",
        "expected": "exit code 2 and a message naming Linux and macOS",
        "input": "daybook demo --out daybook-demo-table on Windows",
        "kind": "claim",
        "outcome": "Real input produced the expected result: Linux and macOS",
        "returncode": 2,
        "source": "| 2 | Unsupported platform or invalid command-line arguments. |",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "yes"
      },
      {
        "claim": "The demo brief is saved under daybook-demo/state/briefs as Markdown and JSON",
        "command": "",
        "evidence": "Prerequisite missing: the README says Windows is unsupported (locking uses fcntl). On this Windows guest daybook demo refuses to run (exit 2, Linux and macOS message), so no brief is produced. Not testable here.",
        "expected": "",
        "input": "",
        "kind": "claim",
        "outcome": "Prerequisite missing: the README says Windows is unsupported (locking uses fcntl). On this Windows guest daybook demo refuses to run (exit 2, Linux and macOS message), so no brief is produced. Not testable here.",
        "source": "The brief is printed and saved under `daybook-demo/state/briefs/` as Markdown and",
        "source_checked": true,
        "source_file": "README.md",
        "verdict": "blocked"
      }
    ],
    "cycle_checks": [
      {
        "claim": "Scheduled or looping main behavior",
        "command": "",
        "evidence": "Entry points inspected: second_brain/cli.py subcommands (demo, init, doctor, brief, status, and similar) and README. No scheduler, cron, webhook, daemon or --once trigger exists; --now only fixes the clock for synthetic demos. The while True loops in second_brain/daybook.py (prompt-size trimming) and second_brain/sessions.py (transcript line reading) are not product cycles. README says No web server or scheduler is installed. On this Windows guest the CLI exits with code 2 before any command runs.",
        "expected": "identify the product trigger",
        "input": "source inspection",
        "kind": "cycle",
        "outcome": "Entry points inspected: second_brain/cli.py subcommands (demo, init, doctor, brief, status, and similar) and README. No scheduler, cron, webhook, daemon or --once trigger exists; --now only fixes the clock for synthetic demos. The while True loops in second_brain/daybook.py (prompt-size trimming) and second_brain/sessions.py (transcript line reading) are not product cycles. README says No web server or scheduler is installed. On this Windows guest the CLI exits with code 2 before any command runs.",
        "source": "repository entry points",
        "verdict": "yes"
      }
    ],
    "details": {
      "argv": [
        "C:\\coldpass\\workspace\\.venv\\Scripts\\daybook.exe",
        "demo",
        "--out",
        "daybook-demo-checker-4b5375775d9f4f26b79ffcc6679c997a"
      ],
      "kind": "cli",
      "needs_browser": false,
      "needs_credentials": false,
      "returncode": 2,
      "scope": "product operation",
      "stderr": "",
      "stdout": "daybook supports Linux and macOS; Windows is not supported yet\n[excerpt truncated]",
      "working": false
    },
    "evidence_strength": "partly_checked",
    "example_checks": [
      {
        "claim": "Documented offline test suite runs",
        "command": "",
        "deferred": false,
        "evidence": "Prerequisite missing: the README says Windows is unsupported because locking uses fcntl. On this Windows guest, with the README venv at .venv\\Scripts\\python.exe, the documented command ran and failed at import: 'ModuleNotFoundError: No module named fcntl' (Ran 42 tests, FAILED errors=41, skipped=1). Not run as a passing example; the suite needs Linux/macOS.",
        "expected": "documented command completes successfully",
        "input": "",
        "kind": "example",
        "outcome": "Prerequisite missing: the README says Windows is unsupported because locking uses fcntl. On this Windows guest, with the README venv at .venv\\Scripts\\python.exe, the documented command ran and failed at import: 'ModuleNotFoundError: No module named fcntl' (Ran 42 tests, FAILED errors=41, skipped=1). Not run as a passing example; the suite needs Linux/macOS.",
        "source": "README.md: Extensions and development (python -m unittest discover -s tests -q)",
        "verdict": "blocked"
      },
      {
        "claim": "Documented byte-compile check of package and tests",
        "command": "'C:\\coldpass\\workspace\\.venv\\Scripts\\python.exe' -m compileall -q second_brain tests",
        "deferred": false,
        "evidence": "",
        "expected": "Silent exit 0",
        "input": "python -m compileall -q second_brain tests",
        "kind": "example",
        "outcome": "command completed successfully with no output",
        "returncode": 0,
        "source": "README.md: Extensions and development",
        "verdict": "yes"
      }
    ],
    "status": "PASS"
  },
  "deviations": [
    "Windows guest instead of Linux/macOS: README says Windows is unsupported, so the demo, doctor and brief steps could not run past the platform refusal.",
    "uv installer needed Set-ExecutionPolicy -Scope Process Bypass (process scope only) before it would run.",
    "Git not installed and no git metadata; pinned-commit fetch (TayHCode/daybook 71fae3bc372b13f8f4172f3f7fd113ef2ad3267a) was not performed; the snapshot in C:\\coldpass\\workspace was used as supplied.",
    "Documented offline unit tests fail on Windows at import of fcntl; recorded as a prerequisite example, not a pass.",
    "No browser, credentials or servers were used; no servers were started, so none needed stopping."
  ],
  "fault_owner": "prerequisite",
  "main_blocker": "The product is Linux/macOS only (fcntl locking); it refuses to run on this Windows guest with exit code 2.",
  "operation": "Run the README quickstart on a fresh guest: create a uv venv, install daybook-core, run daybook demo, then doctor",
  "operation_scope": "Windows guest (the README supports Linux and macOS only; Windows is unsupported because locking uses fcntl). uv 0.13.5 installed user-locally in C:\\coldpass\\uvbin; uv venv --python 3.12 downloaded CPython 3.12.15; package install succeeded. daybook demo refuses to run on Windows and exits 2. Git is not installed and the source tree is not a git checkout, so the pinned-commit git steps were not run.",
  "outcome": "unverified",
  "plain_failure": "daybook does not run on Windows. Its own program stops right away and says it only supports Linux and macOS, so the demo and daily brief could not be produced here.",
  "steps": [
    "uv venv --python 3.12",
    "uv pip install --python .venv\\Scripts\\python.exe .",
    "daybook demo --out daybook-demo (exit 2: 'daybook supports Linux and macOS; Windows is not supported yet')",
    "python -m unittest discover -s tests -q (41 errors: No module named fcntl)",
    "python -m compileall -q second_brain tests"
  ],
  "stuck_step": "daybook demo --out daybook-demo on Windows",
  "suggested_fix": "Run the quickstart on a Linux or macOS guest (for example Ubuntu with uv installed). Optionally add a Windows-specific locking implementation, or document the platform gate in the README quickstart before testing on Windows."
}