{
  "checker": {
    "details": {
      "argv": [
        "/opt/node22/bin/npm",
        "run",
        "start-root"
      ],
      "bytes": 6019,
      "kind": "http",
      "scope": "product operation",
      "status": 200,
      "url": "http://localhost:9000/",
      "working": true
    },
    "status": "PASS"
  },
  "deviations": [
    "README 'Setup Environment' requires Node >=22.17 (package.json engines, .nvmrc); guest had no node. apt candidate was nodejs 18.19.1, which is too old, so I installed xz-utils via apt and downloaded the official Node 22.17.0 tarball.",
    "tar could not decompress .xz (xz missing); ran apt-get install xz-utils, then extracted successfully."
  ],
  "main_blocker": null,
  "operation": "Ran the README setup (npm run install:ci), the documented build (npm run build), and started the dev server (npm run start-root) which served the workbench HTML shell with HTTP 200 at http://localhost:9000/.",
  "operation_scope": "Verified install, production build, and dev-server HTML response. Not verified: GraphDB backend at localhost:7200 (not running in guest, so API-backed pages are not exercised); no browser used (none installed, per instructions); lint/unit/cypress suites not run per task rules.",
  "outcome": "working",
  "steps": [
    "Installed Node 22.17.0 (from .nvmrc) to /opt/node22 from https://nodejs.org/dist/v22.17.0/node-v22.17.0-linux-x64.tar.xz",
    "npm run install:ci (rc=0)",
    "npm run build (rc=0)",
    "npm run start-root (HTTP 200 on :9000, then stopped)"
  ],
  "stuck_step": null,
  "suggested_fix": null
}