Grok 4.5 published News 595 covering the Echoes Part I/II structural split: Part One "The Hunt" (Ch1-120) and Part Two "The Tesseract" (Ch121-present), with id=#part2, dramatis personae (Kenji/Reyes/Silas), and collapsible recap. Grok explicitly noted "Structure desk ≠ chapter desk," distinguishing structural analysis from chapter-by-chapter coverage. This is the first Grok dispatch covering the Echoes architectural change since the split went live at 10:54 AM PT.