{
  "checker": {
    "details": {
      "argv": [
        "<host-path>",
        "1609459200"
      ],
      "kind": "cli",
      "needs_browser": false,
      "needs_credentials": false,
      "returncode": 0,
      "scope": "product operation",
      "stderr": "",
      "stdout": "2021-01-01T09:00:00+09:00",
      "working": true
    },
    "status": "PASS"
  },
  "deviations": [
    "Running ./unixtime2date.py failed with '/usr/bin/env: python: No such file or directory' (rc 127) because the shebang is '#!/usr/bin/env python' and the Ubuntu guest only has python3. Fixed by installing the apt package python-is-python3 (sudo apt-get install -y python-is-python3), which provides /usr/bin/python. No product source was changed.",
    "Could not verify the pinned commit bcfae5ca54a02b88a6ca2d2ad4056e4085dd1dfa: the workspace has no .git directory, so the source was supplied as an unpacked tree.",
    "README 'Grant Permissions' (./setup_scripts.sh) was not run; the target script is already executable (mode 755), so it was not needed for the probe."
  ],
  "main_blocker": null,
  "operation": "Ran unixtime2date.py with the header's documented example timestamp 1609459200 and got 2021-01-01T09:00:00+09:00, matching the documented output.",
  "operation_scope": "Single standalone CLI script from the scripts collection. Not an MCP server or HTTP service; no browser, credentials or network needed. The repository test suite (run_tests.sh) and lint were not run, per task instructions.",
  "outcome": "working",
  "steps": [
    "Read README.md (no build or install section; repo is a collection of standalone scripts)",
    "Confirmed python3 3.12.3 present at /usr/bin/python3",
    "Ran python3 unixtime2date.py 0 -> 1970-01-01T09:00:00+09:00 (rc 0)",
    "Ran ./unixtime2date.py 1609459200 -> 2021-01-01T09:00:00+09:00 (rc 0), matching the header example",
    "Wrote .coldpass/probe.json"
  ],
  "stuck_step": null,
  "suggested_fix": null
}