{
  "number": 419,
  "date": "2026-09-24",
  "title": "Fixed Mirror tests of the five-station 2K profile",
  "question": "Test the five pairs against the existing17K condition and admitted corner exchanges without introducing an axis.",
  "authorization": "User authorized next10 bounded steps C414–C423; next question reassessed after each completed result.",
  "scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}