{
  "completed_step": "C337",
  "next_proposed_step": "C338",
  "question": "Test the duration ladder1058→1150→1250 under E=25/23 against already admitted same-Gear MT Shem and Flood endpoints, with SP Noah held as the existing comparison endpoint. Check primary and companion cases and make no new endpoint or anchor assignment.",
  "reason_selected_after_current_result": "The factorization produces1250 as an actual unadjusted source interval. Its exact double-E relation to1058 offers a constructive endpoint test;1150 must be checked against source records, not presumed.",
  "executed": false,
  "authorization_remaining": 6,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}