{
  "completed_step": "C317",
  "next_proposed_step": "C318",
  "question": "Audit the paired458 replacement as explicit source-state operations: cumulative CainanON plus annual-index change, and regular SP→MT Flood comparison plus declared restoration and Gear change. Check every intermediate source state and boundary.",
  "reason_selected_after_current_result": "This is the substantive link between a valid600 biography and the2K+15K framework. Its source operations and domain must be established before treating the numeric458 coincidence as a permitted composition.",
  "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."
}