{
  "number": 278,
  "title": "The finite598/600/602 correspondence",
  "slug": "Finite_598_600_602_Correspondence",
  "question": "Do the forward and reverse two-year shifts close on the retained SP register?",
  "date": "2026-09-24",
  "scope": "Mirror and529; regular Gears Noah/Shem/Flood only; no canonical or graph changes",
  "source_qualifications": "Retain phase ancestry, profile/state/frame and event identity; generated coordinates do not add events.",
  "research_authorization": "Sequential batch through C310; reassess after every step"
}