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  "authors": [
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  "construction": "Central CSS tensor product of board inputs 8-6-2 and 15-7-3, in that order, using arXiv:2609.37231 Eqs. (14)-(15). Retained zero-based X/Z row indices: [[0], [0], [0, 1, 2, 3], [0, 1, 2, 3]]. Input attribution: 8-6-2: @MathysRennela; 15-7-3: @FarLab. The research note gives the complete reproducible matrix recipe.",
  "references": [
   "https://arxiv.org/abs/2609.37231",
   "https://arxiv.org/abs/1512.07081",
   "https://arxiv.org/abs/2306.16400"
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  "date": "2026-10-03",
  "notes": "Known tensor construction; literature novelty unverified. Final duplicate and WL-signature checks use upstream da1f2c0a1611b215376b249c139f4951e2394418. Neither check constitutes exhaustive equivalence testing. X and Z distances remain witnessed upper bounds.",
  "model": "GPT-6",
  "origin": "submission",
  "novelty": "unknown",
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   "tool": "RIS pilot and witness-returning confirmation",
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   "notes": "The table reports confirmation after the initial 500-trial-per-side pilot. The deepest rung is one million trials per side.",
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    1.0,
    2.0
   ],
   [
    5.0,
    0.0
   ],
   [
    4.0,
    1.0
   ],
   [
    1.0,
    1.0
   ],
   [
    2.0,
    0.0
   ],
   [
    4.0,
    4.0
   ],
   [
    1.0,
    4.0
   ],
   [
    3.0,
    3.0
   ],
   [
    3.0,
    4.0
   ],
   [
    4.0,
    4.0
   ],
   [
    1.0,
    4.0
   ],
   [
    3.0,
    2.0
   ],
   [
    3.0,
    3.0
   ]
  ],
  "layers": 2,
  "interaction_radius": 6.0828,
  "contributed_by": {
   "by": [
    "@dorakingx"
   ],
   "date": "2026-10-07",
   "method": "Simulated annealing over site assignments on an integer grid with the repo's own research/local2d/fold_layout.search_layout (max-diameter objective, several bounding boxes and seeds); single layer at radius 4 tried first, then two layers at 7. Radius and per-site occupancy re-measured with the verifier's rule."
  }
 }
}