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 "provenance": {
  "authors": [
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  "construction": "Symplectically halved pair-partition code (Lee et al. 2026) converted to CSS via LC (arXiv:2610.28737).",
  "origin": "submission",
  "date": "2026-10-22",
  "model": "Beam 1.0"
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  "rounds": 10,
  "stim_version": "1.16.0",
  "notes": "Johnson-coil + 2 span flags sequential extraction (max_flags=5 per check, 12 X + 11 Z edge-colored data CX layers per round, coloring candidate 0); generated by qldpc submit (research/circuit_autogen.py, seed 0), the first of up to 6 candidates whose RIS screen at 2 rounds found nothing below d; witnesses from RIS on ker(H_dem) at twice the gate's trial budget, validated in GF(2)",
  "contributed_by": {
   "by": [
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   ],
   "date": "2026-11-06",
   "method": "circuit_autogen schedule search (two-block interleaved, then layout, then generic), verified by verify/circuit_verify.py before writing"
  }
 }
}