{
  "number": 421,
  "date": "2026-09-24",
  "title": "Source-path obstruction for the new held-Noah squared-E endpoint",
  "question": "Test exact two-E pivot realizations and prove the positive E/P/J same-map restriction.",
  "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."
}