$ headless-seo-check http://127.0.0.1:4311 -a --allow-dynamic --no-color
--- stdout+stderr ---
headless-seo-check: checking http://127.0.0.1:4311 …
headless-seo-check: 23 URLs pointed at another host, checked on 127.0.0.1:4311 instead
headless-seo-check: 23 of 23 URLs selected, from http://127.0.0.1:4311/sitemap.xml
headless-seo-check http://127.0.0.1:4311
  23 of 23 URLs checked, from http://127.0.0.1:4311/sitemap.xml
  23 URLs pointed at another host, checked on 127.0.0.1:4311 instead

  ! /                    static, 324 words
      warn  no canonical link in the served HTML
  ! /static              static, 325 words
      warn  no canonical link in the served HTML
  ! /force-dynamic       rendered per request, 323 words
      warn  rendered on every request, never cached at the edge
            cache-control: private, no-cache, no-store, max-age=0, must-revalidate
      warn  no canonical link in the served HTML
  ! /isr                 static, 324 words
      warn  no canonical link in the served HTML
  ! /noindex-meta        static, 324 words
      warn  <meta robots> says noindex, yet this URL is offered for crawling
            <meta robots content="noindex, nofollow">
      warn  no canonical link in the served HTML
  x /noindex-header      static, 326 words
      error blocked from indexing by a response header that does not appear in the page source
            X-Robots-Tag: noindex, nofollow
      warn  no canonical link in the served HTML
  x /noindex-conflict    static, 325 words
      error blocked from indexing by a response header that does not appear in the page source
            X-Robots-Tag: noindex, nofollow
      error the header and the HTML disagree about indexing, and the header is the one that counts
            X-Robots-Tag: noindex, nofollow
            <meta name="robots" content="index, follow">
      warn  no canonical link in the served HTML
  + /canonical-self      static, 324 words
  + /canonical-other     static, 327 words
      info  canonical points at another page
            http://127.0.0.1:4311/static
  + /hreflang-good       static, 324 words
  x /hreflang-drift      static, 324 words
      error the Link: header and the HTML advertise different URLs for 1 language
            fr  header: http://127.0.0.1:4311/fr/hreflang-drift
            fr  HTML:   http://127.0.0.1:4311/fr/slug-traduit
            fr  the header target answers HTTP 200
  + /hreflang-dead       static, 327 words
  x /hreflang-drift-dead static, 327 words
      error the Link: header and the HTML advertise different URLs for 1 language
            fr  header: http://127.0.0.1:4311/fr/nexiste-pas
            fr  HTML:   http://127.0.0.1:4311/fr/slug-traduit
            fr  the header target does not exist (HTTP 404)
      error 1 hreflang target in the Link: header do not exist
            fr  http://127.0.0.1:4311/fr/nexiste-pas — does not exist (HTTP 404)
  + /hreflang-html-only  static, 325 words
  x /shell               static, 0 words
      warn  no canonical link in the served HTML
      error the served HTML carries 0 words — Googlebot has to run JavaScript to see this page
            7 <script src> + 3 KB inline JS + an empty root container
      warn  no links to any other page on this host — the navigation is not in the served HTML
  ! /cjk                 static, 268 words
      warn  no canonical link in the served HTML
  x /cjk-thin            static, 39 words
      warn  no canonical link in the served HTML
      error the served HTML carries 39 words — Googlebot has to run JavaScript to see this page
            6 <script src> + 3 KB inline JS
      warn  no links to any other page on this host — the navigation is not in the served HTML
  ! /thin                static, 117 words
      warn  no canonical link in the served HTML
      warn  the served HTML carries 117 words for a page that ships an application bundle
            6 <script src> + 4 KB inline JS
  ! /fr/slug-traduit     static, 307 words
      warn  no canonical link in the served HTML
  ! /fr/hreflang-drift   static, 310 words
      warn  no canonical link in the served HTML
  ! /fr/hreflang-good    static, 308 words
      warn  no canonical link in the served HTML
  x /gone                HTTP 404
      error HTTP 404 — in your sitemap, but not on your site
  . /redirected-old      HTTP 308 — redirects to http://127.0.0.1:4311/static

  FAILED  9 blocking issues, 19 warnings
     2 × empty-server-html
     2 × hreflang-drift
     2 × noindex-header
     1 × hreflang-dead-target
     1 × indexability-conflict
     1 × sitemap-url-error

  What to do
    empty-server-html
      The server returns a shell — Googlebot has to execute JavaScript before it
      sees any content at all, and that rendering is queued, budgeted and never
      guaranteed. Move the content into the server render.
    hreflang-drift
      The Link: header and the HTML advertise different alternates for the same
      language, so the page has two sources of truth and one of them is wrong.
      Frameworks derive header alternates by swapping a locale prefix, which
      breaks the moment slugs are translated. Emit alternates in one place, not
      both.
    noindex-header
      The response carries X-Robots-Tag: noindex. The header outranks <meta
      robots> and is invisible in the page source, so nobody finds it by reading
      the HTML. It usually comes from middleware, an edge function, or a CDN rule
      left behind by a staging deploy.
    hreflang-dead-target
      An alternate points at a URL that does not exist. Google drops the whole
      hreflang cluster when one side is dead, so this costs you every language,
      not just the broken one. Fix the target or remove the alternate — an
      alternate that merely redirects is untidy, this one is not.
    indexability-conflict
      X-Robots-Tag, <meta robots> and the canonical are three independent switches
      and they disagree here. The header wins. Decide which one is right, then
      make the other two say the same thing.
    sitemap-url-error
      This URL is in your sitemap but not on your site. Either restore the page or
      drop it from the sitemap — a sitemap full of errors reduces how much Google
      trusts the rest of it.

--- exit code: 1 ---