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    308
   ],
   [
    181,
    223,
    273,
    322
   ],
   [
    189,
    264,
    297,
    331
   ],
   [
    190,
    242,
    283,
    327
   ],
   [
    191,
    238,
    262,
    293
   ],
   [
    249,
    284,
    305,
    316
   ],
   [
    202,
    251,
    285,
    318
   ],
   [
    194,
    236,
    266,
    325
   ],
   [
    195,
    261,
    323,
    334
   ],
   [
    196,
    241,
    286,
    291
   ],
   [
    198,
    211,
    271,
    290
   ],
   [
    212,
    259,
    281,
    312
   ],
   [
    201,
    245,
    258,
    321
   ],
   [
    268,
    280,
    302,
    319
   ],
   [
    243,
    260,
    295,
    317
   ],
   [
    204,
    272,
    287,
    324
   ],
   [
    289,
    320,
    326,
    332
   ],
   [
    237,
    296,
    314,
    333
   ],
   [
    274,
    303,
    315,
    330
   ],
   [
    248,
    288,
    299,
    311
   ],
   [
    265,
    292,
    329,
    335
   ],
   [
    327,
    333,
    334,
    335
   ]
  ]
 },
 "distance": {
  "d": 6,
  "X": {
   "value": 8,
   "confidence": "upper_bound",
   "witness": [
    54,
    88,
    89,
    169,
    170,
    254,
    288,
    299
   ]
  },
  "Z": {
   "value": 6,
   "confidence": "upper_bound",
   "witness": [
    144,
    187,
    215,
    233,
    279,
    313
   ]
  }
 },
 "provenance": {
  "authors": [
   "@msilve160"
  ],
  "construction": "Planar hyperbolic {4,6} code, literature reproduction from github.com/QEC-pages/Quantum_LDPC_Codes @ 1c95489383564e4dc2cce517de00d64d6f2c4f56, Hyperbolic_Codes_Planar.zip, parity-check matrices for N=336. Same source repository already used for codes/720-122-8.json, codes/864-146-8.json, codes/896-194-6.json, codes/900-182-8.json, codes/960-258-6.json (Seam D, fieldnotes/2026-09-18-hackathon-1155-frontier-map-and-playbook.md); this pulls a different (p,q,N) entry from the same pinned catalog (Hyperbolic_Codes.tsv) that those five did not use. CSS code, edge model.",
  "references": [
   "github.com/QEC-pages/Quantum_LDPC_Codes"
  ],
  "date": "2026-09-19",
  "notes": "",
  "model": "Claude Sonnet 5"
 },
 "family": "topological"
}