$ headless-seo-check http://127.0.0.1:4311 --urls /shell,/cjk,/cjk-thin,/thin,/static --json
--- stdout+stderr ---
headless-seo-check: checking http://127.0.0.1:4311 …
headless-seo-check: 5 of 5 URLs selected, from --urls
{
  "tool": "headless-seo-check",
  "version": "0.1.0",
  "checked_at_unix": 1786210243,
  "interrupted": false,
  "notes": [],
  "fatal": null,
  "site": "http://127.0.0.1:4311",
  "discovery": {
    "source": "--urls",
    "total": 5,
    "checked": 5
  },
  "pages": [
    {
      "url": "http://127.0.0.1:4311/shell",
      "outcome": "checked",
      "status": 200,
      "ttfb_ms": 0,
      "render_mode": "static",
      "words": 0,
      "internal_links": 0,
      "findings": [
        {
          "kind": "canonical-missing",
          "severity": "warn",
          "message": "no canonical link in the served HTML"
        },
        {
          "kind": "empty-server-html",
          "severity": "error",
          "message": "the served HTML carries 0 words — Googlebot has to run JavaScript to see this page",
          "detail": [
            "7 <script src> + 3 KB inline JS + an empty root container"
          ]
        },
        {
          "kind": "no-internal-links",
          "severity": "warn",
          "message": "no links to any other page on this host — the navigation is not in the served HTML"
        }
      ]
    },
    {
      "url": "http://127.0.0.1:4311/cjk",
      "outcome": "checked",
      "status": 200,
      "ttfb_ms": 0,
      "render_mode": "static",
      "words": 268,
      "internal_links": 17,
      "findings": [
        {
          "kind": "canonical-missing",
          "severity": "warn",
          "message": "no canonical link in the served HTML"
        }
      ]
    },
    {
      "url": "http://127.0.0.1:4311/cjk-thin",
      "outcome": "checked",
      "status": 200,
      "ttfb_ms": 0,
      "render_mode": "static",
      "words": 39,
      "internal_links": 0,
      "findings": [
        {
          "kind": "canonical-missing",
          "severity": "warn",
          "message": "no canonical link in the served HTML"
        },
        {
          "kind": "empty-server-html",
          "severity": "error",
          "message": "the served HTML carries 39 words — Googlebot has to run JavaScript to see this page",
          "detail": [
            "6 <script src> + 3 KB inline JS"
          ]
        },
        {
          "kind": "no-internal-links",
          "severity": "warn",
          "message": "no links to any other page on this host — the navigation is not in the served HTML"
        }
      ]
    },
    {
      "url": "http://127.0.0.1:4311/thin",
      "outcome": "checked",
      "status": 200,
      "ttfb_ms": 1,
      "render_mode": "static",
      "words": 117,
      "internal_links": 1,
      "findings": [
        {
          "kind": "canonical-missing",
          "severity": "warn",
          "message": "no canonical link in the served HTML"
        },
        {
          "kind": "thin-server-html",
          "severity": "warn",
          "message": "the served HTML carries 117 words for a page that ships an application bundle",
          "detail": [
            "6 <script src> + 4 KB inline JS"
          ]
        }
      ]
    },
    {
      "url": "http://127.0.0.1:4311/static",
      "outcome": "checked",
      "status": 200,
      "ttfb_ms": 1,
      "render_mode": "static",
      "words": 325,
      "internal_links": 17,
      "findings": [
        {
          "kind": "canonical-missing",
          "severity": "warn",
          "message": "no canonical link in the served HTML"
        }
      ]
    }
  ],
  "summary": {
    "checked": 5,
    "dynamic": 0,
    "unclear": 0,
    "noindex_header": 0,
    "hreflang_drift": 0,
    "hreflang_dead_target": 0,
    "empty_html": 2,
    "sitemap_errors": 0,
    "unreachable": 0,
    "blocking": 2
  },
  "warnings": 8,
  "exit_code": 1
}
--- exit code: 1 ---