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  ],
  "layers": 2,
  "contributed_by": {
   "by": [
    "@vprusso"
   ],
   "date": "2026-11-04",
   "method": "Inherited from the laid-out parent codes/172-48-8.json: the parent's coordinates with the entry of the removed qubit (parent index 153) dropped, since this puncture child keeps the parent's qubit order. Radius, layer count, and class re-measured by the verifier."
  }
 },
 "circuit": {
  "d_circ": {
   "Z": {
    "value": 7,
    "confidence": "upper_bound",
    "witness": [
     101047,
     101051,
     101095,
     101099,
     101103,
     101107,
     101133
    ]
   },
   "X": {
    "value": 7,
    "confidence": "upper_bound",
    "witness": [
     100963,
     100969,
     101012,
     101015,
     101085,
     101088,
     101131
    ]
   }
  },
  "rounds": 7,
  "stim_version": "1.16.0",
  "notes": "Johnson-coil + 4 span flags sequential extraction (max_flags=6 per check, 13 X + 12 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": [
    "@vprusso"
   ],
   "date": "2026-11-06",
   "method": "circuit_autogen schedule search (two-block interleaved, then layout, then generic), verified by verify/circuit_verify.py before writing"
  }
 }
}