{
  "completed_step": "C409",
  "next_proposed_step": "C410",
  "question": "Enumerate the fixed−500 comparison on all373 existing regular coordinates, preserving every endpoint label. Classify the source-supported arrows, determine maximal finite chains, and distinguish the proven Noah/Flood-to-Shem role correspondence from additional coordinate coincidences. Do not search other shifts or introduce new endpoints.",
  "reason_selected_after_current_result": "Mirror closure fails for a specific source reason. A complete finite domain census of the already motivated500 translation can show what regular source structure it actually supports before considering any broader transport claim.",
  "executed": false,
  "authorization_remaining": 4,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}