{
  "completed_step": "C350",
  "next_proposed_step": "C351",
  "question": "Test the cumulative counterpart of the two598→600 repairs on C287’s existing ON-Shem/OFF-Shem/OFF-Flood triples. Check all four complete paths, preserve annual-index and Cainan distinctions, and compare the result with the regular primary repairs.",
  "reason_selected_after_current_result": "The regular source relations and their composition limits are settled. The retained cumulative460+598 dissection offers a directly relevant Mirror/529 comparison that uses no new endpoint search.",
  "executed": false,
  "authorization_remaining": 3,
  "fixed_scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}