{
  "completed_step": "C385",
  "next_proposed_step": "C386",
  "question": "Verify the surviving E/J square as a whole affine identity, determine its exact relation to the sourced500/600 Shem geometry, and distinguish a matched-component comparison from one physical-time map.",
  "reason_selected_after_current_result": "C385 found a genuine source-qualified J continuation where the direct Flood-pivot square failed. Its algebra and phase meaning should be settled before extending the diagram.",
  "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."
}