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  ]
 },
 "distance": {
  "d": 23,
  "P": {
   "value": 23,
   "confidence": "upper_bound",
   "witness": {
    "X": [
     31,
     33,
     54,
     56,
     71,
     73,
     88,
     89,
     104,
     105,
     132,
     134,
     149,
     151,
     166,
     168
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     168
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   }
  }
 },
 "provenance": {
  "authors": [
   "@FarLab"
  ],
  "construction": "One-block cyclic stabilizer code: generator X^a Z^b and its 173 cyclic shifts, a(x) = x^83 + x^84 + x^89 + x^90, b(x) = x^11 + x^84 + x^89 + x^162 in F_2[x]/(x^173 - 1); a = g p, b = g q with p, q palindromic so that a b* + b a* = 0; k = deg gcd(a, b, x^173 - 1)",
  "origin": "submission",
  "date": "2026-10-01",
  "model": "Claude Fable 5.1",
  "notes": "Found by a sweep of one-block palindromic cyclic codes (Camara-Ollivier-Tillich-type group-algebra code over Z_173, arXiv:quant-ph/0502086), n = 17..200, weight <= 8. Distance ladder: 300-trial Pauli-weight RIS screen, then 2 x 20,000 trials on fresh seeds (dropped 33->23). Novelty unknown: not checked against codetables.de; the dedup gate found no exact, WL-equivalent or Hadamard-image board entry. Genuinely non-CSS: a and b overlap, so every generator carries Y.",
  "references": [
   "arXiv:quant-ph/0502086"
  ],
  "novelty": "unknown"
 },
 "family": "other"
}