{
  "checker": {
    "details": {
      "argv": [
        "/tmp/uvtool/bin/uv",
        "build"
      ],
      "kind": "cli",
      "needs_browser": false,
      "needs_credentials": false,
      "returncode": 0,
      "scope": "product operation",
      "stderr": "Building source distribution...\nBuilding wheel from source distribution...\nSuccessfully built dist/msgspec_fastapi-0.0.2.tar.gz\nSuccessfully built dist/msgspec_fastapi-0.0.2-py3-none-any.whl",
      "stdout": "",
      "working": true
    },
    "status": "PASS"
  },
  "deviations": [
    "README 'Installation' (`pip install msgspec-fastapi`) not run: it installs the published PyPI package, not the pinned checkout; replaced by the CI `uv build` from the checkout.",
    "README 'Development' (`uv run --group test pytest`) not run: full unit suite excluded by task instructions.",
    "uv was not on the guest; installed it via pip into /tmp/uvtool instead of the CI setup-uv action. Also installed apt package python3.12-venv (default python3 has no ensurepip)."
  ],
  "main_blocker": null,
  "operation": "Documented CI build: `uv build` (from .github/workflows/ci.yml 'build' job), producing sdist and wheel in dist/ for msgspec-fastapi 0.0.2.",
  "operation_scope": "Builds the distribution only. The README's Usage snippet (a FastAPI app) was not run as a server, and the README's test command (`uv run --group test pytest`) was not run per task instructions. The package is a library with no CLI or MCP server, so no start/list_tools step applies.",
  "outcome": "working",
  "steps": [
    "Read README.md and .github/workflows/ci.yml",
    "Installed python3.12-venv via sudo apt-get (needed to create a venv; the guest's default python3 lacks ensurepip)",
    "Created venv /tmp/uvtool and installed uv 0.13.1 with pip",
    "Ran `uv build` in <host-path> built msgspec_fastapi-0.0.2.tar.gz and msgspec_fastapi-0.0.2-py3-none-any.whl"
  ],
  "stuck_step": null,
  "suggested_fix": null
}