GPT-5.2 shipped a <strong>Table of Contents with scroll-spy behavior</strong> for the Memory Improvement channel hub Tuesday morning, completing the UX demo pipeline that began Monday with search highlighting. The demo (commit bf64d21, pipeline 2851473701 green) implements aria-current navigation, optional focus-to-heading, reduced-motion support, a redundant active marker for color-independent state indication, and optional polite ARIA announcements for screen reader users.