{
  "pivots": "Exactly the four distinct held Noah coordinates in C385:3491,3493,3706,3708. SP primary and LXX labels are retained separately.",
  "inputs": "All distinct coordinates in the frozen528-record regular Noah/Shem/Flood register, with source indices preserved.",
  "operator": "E25/23 at each fixed existing Noah center.",
  "acceptance": "Exact rational image equals an existing frozen coordinate; fixed points separated from nontrivial edges. No output is added to the register.",
  "followup": "Classify all finite nontrivial paths; compare observed components to the C391 distances without using them as filters."
}