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   "confidence": "upper_bound",
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 "provenance": {
  "authors": [
   "@MathysRennela"
  ],
  "construction": "Bivariate bicycle code QC(A,B) on Z_12 x Z_6 with asymmetric weight-3+5 generators A = 1 + x^5 y^2 + x^7, B = 1 + y^5 + x^3 y^2 + x^7 y + x^8 y^3 (weight-8 checks). Found by a weight-8 gap sweep extending arXiv:2609.06572's family; same parameters as the board's [[144,8,16]] but with weight-8 checks.",
  "origin": "submission",
  "date": "2026-09-09",
  "model": "Omen Alpha 1.0",
  "notes": "Same [[n,k,d]] parameter set as the board's existing [[144,8,16]] (w=10 checks) but a different construction reaching it at weight 8. Distance: RIS upper bound d<=16 (20k trials), corroborated by BP+OSD at 200k trials/side (weight-16 logicals, nothing lighter); exact certification not run.",
  "novelty": "known_parameters"
 },
 "family": "bivariate-bicycle"
}