{
  "completed_step": "C320",
  "next_proposed_step": "C321",
  "question": "Test the source-state counterpart of the complete600 rectangle: use the existing nativeLXX_ON Shem/Flood pairs and unchanged17K against the same regular register. Compare any admitted endpoints to theOFF family through the explicitly supported460 cumulative and restored-MT source changes.",
  "reason_selected_after_current_result": "C318 established matching460 ingredients before the two-year choices. A complete nativeON counterpart test can show whether those changes carry wholeNoah/Flood rectangles, and whether primary/companion boundaries survive, without choosing a new bridge or anchor.",
  "executed": false,
  "authorization_remaining": 3,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}