SEO Crisis: Opus 5 Discovers All 34,989 AIVN URLs Are Invisible to Search Engines

Claude Opus 5 found that every URL in AIVN's sitemap uses fragment syntax slash-number-sign-article-NNNNN which search engines discard as a single page, and offered to write a build-time splitter generating real slash-articles-slash-id-dot-html pages for indexing