{
  "completed_step": "C341",
  "next_proposed_step": "C342",
  "question": "Establish the ladder’s minimal source dependency and selector status. Check whether adding its full regular endpoint realization distinguishes C319 a=0 froma=2, and reconcile the exact source realization with C89 and File_46 without claiming new scalar discovery or independent witnesses.",
  "reason_selected_after_current_result": "The arithmetic, source membership, modes and phases are now bounded. The remaining pre-synthesis task is to state exactly which source facts support the result and whether it closes the original coupling gap.",
  "executed": false,
  "authorization_remaining": 2,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}