{
 "schema_version": "0.2",
 "name": "[[30,17,2]]",
 "code_type": "CSS",
 "n": 30,
 "k": 17,
 "checks": {
  "X": [
   [
    0,
    1,
    3,
    16,
    19,
    22,
    25,
    28
   ],
   [
    2,
    4,
    6,
    15,
    17,
    20,
    23,
    26
   ],
   [
    0,
    1,
    3,
    18,
    21,
    24,
    27,
    29
   ],
   [
    5,
    7,
    9,
    15,
    17,
    20,
    23,
    26
   ],
   [
    8,
    10,
    12,
    15,
    17,
    20,
    23,
    26
   ],
   [
    11,
    13,
    14,
    15,
    17,
    20,
    23,
    26
   ]
  ],
  "Z": [
   [
    0,
    2,
    5,
    8,
    11,
    15,
    16,
    18
   ],
   [
    1,
    4,
    7,
    10,
    13,
    15,
    16,
    18
   ],
   [
    0,
    2,
    5,
    8,
    11,
    17,
    19,
    21
   ],
   [
    3,
    6,
    9,
    12,
    14,
    15,
    16,
    18
   ],
   [
    0,
    2,
    5,
    8,
    11,
    20,
    22,
    24
   ],
   [
    0,
    2,
    5,
    8,
    11,
    23,
    25,
    27
   ],
   [
    0,
    2,
    5,
    8,
    11,
    26,
    28,
    29
   ]
  ]
 },
 "distance": {
  "d": 2,
  "X": {
   "value": 2,
   "confidence": "upper_bound",
   "witness": [
    22,
    24
   ]
  },
  "Z": {
   "value": 2,
   "confidence": "upper_bound",
   "witness": [
    24,
    27
   ]
  }
 },
 "provenance": {
  "authors": [
   "@MathysRennela"
  ],
  "construction": "C-DELETE-CHECK a1 from 30-16-2.json",
  "origin": "submission",
  "date": "2026-10-19",
  "model": "Beam 1.0"
 },
 "circuit": {
  "d_circ": {
   "Z": {
    "value": 2,
    "confidence": "upper_bound",
    "witness": [
     267,
     268
    ]
   },
   "X": {
    "value": 2,
    "confidence": "upper_bound",
    "witness": [
     1,
     2
    ]
   }
  },
  "rounds": 2,
  "stim_version": "1.16.0",
  "notes": "Generic sequential two-block extraction: one ancilla per check, X checks then Z checks each round with joint reset and measurement layers; CX layers are a proper edge coloring of each Tanner graph (8 X + 9 Z 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)"
 }
}