{
  "number": 357,
  "date": "2026-09-24",
  "title": "Source constants and context controls for the three-row E pattern",
  "question": "Which independent constants produce the three460→500 rows, and which finite context/rail/Gear settings admit them together?",
  "authorization": "User authorized next10 bounded steps C354–C363; 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."
}