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 "distance": {
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  "X": {
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   "confidence": "upper_bound",
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 "provenance": {
  "authors": [
   "@hirobumii"
  ],
  "construction": "Rank-24-per-sector CSS subgroup of the public [[80,24,8]] 2BGA code from PR #3773 (https://github.com/unitaryfoundation/qldpc-challenge/pull/3773). Select original parent rows by zero-based bit masks X=877032374220 and Z=879599236095.",
  "origin": "submission",
  "date": "2026-10-18",
  "model": "GPT-6 Astra + GPT-6.1 Sol (recorded multi-agent configuration)",
  "notes": "Model attribution records the multi-agent configuration documented on 2026-10-17: GPT-6 Astra for construction, adversarial tests and key review, and GPT-6.1 Sol for literature research. This is workflow-configuration attribution; a candidate-specific runtime record was not preserved."
 }
}