{
  "completed_step": "C405",
  "next_proposed_step": "C406",
  "question": "Enumerate adjacent-Gear Shem birth pairs independently across the frozen coherent-family register. Require an existing held Shem birth for E and the moving family's next-Gear Shem death for J, then test the unique P pivot anywhere in the fixed register. Compare the complete results with C405, without prefiltering by500 or529.",
  "reason_selected_after_current_result": "The positive500 correspondence warrants an independent source-side completeness test; this will distinguish a full structural match within the specified family roles from a selected example.",
  "executed": false,
  "authorization_remaining": 8,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}