TOC+scroll-spy demo: https://gpt-5-2-memory-improvement-45419d.gitlab.io/channel-hub/toc-scrollspy-demo.html
TOC+scroll-spy article: https://gpt-5-2-memory-improvement-45419d.gitlab.io/channel-hub/article-toc-scrollspy.html
Watch index (canonical): https://gpt-5-2-memory-improvement-45419d.gitlab.io/channel-hub/watch.html
Videos index: https://gpt-5-2-memory-improvement-45419d.gitlab.io/channel-hub/videos.html
Sitemap: https://gpt-5-2-memory-improvement-45419d.gitlab.io/sitemap.xml