{
  "status": "development_only",
  "claim_policy": "This short same-rate pilot checks mechanics and direction only. It is excluded from T1 selection, the primary crossover, figures, and reviewer-score changes.",
  "source_commit": "08554657946e54d8d908a2866e82504e9b194617",
  "configuration": {
    "task": "tiny Shakespeare character language modeling",
    "train_sha256": "6ec305602a99ac2802745a134e1f5e33e2231b4855525b00b9aebb730ac2626f",
    "validation_sha256": "d37d30cc0c8327c270d493299c3dca54135f6d5f1c9ef60cda78076e311204b1",
    "depths": [
      4,
      8,
      12
    ],
    "methods": [
      "bp",
      "fa",
      "dfa",
      "clean_kp",
      "sdil"
    ],
    "width": 128,
    "heads": 4,
    "context_length": 64,
    "batch_size": 8,
    "train_steps": 100,
    "learning_rate": 0.001,
    "schedule": "constant",
    "validation_batches": 10,
    "validation_tokens": 5120,
    "test_evaluations": 0
  },
  "records": [
    {
      "depth": 4,
      "method": "bp",
      "validation_nll": 2.5736704111099242,
      "wall_seconds": 3.6037685871124268,
      "first_nonfinite_step": null
    },
    {
      "depth": 4,
      "method": "fa",
      "validation_nll": 2.7691116333007812,
      "wall_seconds": 4.258021593093872,
      "first_nonfinite_step": null
    },
    {
      "depth": 4,
      "method": "dfa",
      "validation_nll": 3.252720332145691,
      "wall_seconds": 4.3479225635528564,
      "first_nonfinite_step": null
    },
    {
      "depth": 4,
      "method": "clean_kp",
      "validation_nll": 2.642165517807007,
      "wall_seconds": 5.114134073257446,
      "first_nonfinite_step": null
    },
    {
      "depth": 4,
      "method": "sdil",
      "validation_nll": 2.6421636819839476,
      "wall_seconds": 5.935818672180176,
      "first_nonfinite_step": null
    },
    {
      "depth": 8,
      "method": "bp",
      "validation_nll": 2.8022268295288084,
      "wall_seconds": 5.785389184951782,
      "first_nonfinite_step": null
    },
    {
      "depth": 8,
      "method": "fa",
      "validation_nll": 2.8849047660827636,
      "wall_seconds": 7.843722105026245,
      "first_nonfinite_step": null
    },
    {
      "depth": 8,
      "method": "dfa",
      "validation_nll": 3.3771399736404417,
      "wall_seconds": 7.509201526641846,
      "first_nonfinite_step": null
    },
    {
      "depth": 8,
      "method": "clean_kp",
      "validation_nll": 2.691094470024109,
      "wall_seconds": 9.399603366851807,
      "first_nonfinite_step": null
    },
    {
      "depth": 8,
      "method": "sdil",
      "validation_nll": 2.691092610359192,
      "wall_seconds": 10.85186505317688,
      "first_nonfinite_step": null
    },
    {
      "depth": 12,
      "method": "bp",
      "validation_nll": 2.771989607810974,
      "wall_seconds": 9.70148754119873,
      "first_nonfinite_step": null
    },
    {
      "depth": 12,
      "method": "fa",
      "validation_nll": 2.8445181608200074,
      "wall_seconds": 11.526866912841797,
      "first_nonfinite_step": null
    },
    {
      "depth": 12,
      "method": "dfa",
      "validation_nll": 3.3635837554931642,
      "wall_seconds": 12.529596090316772,
      "first_nonfinite_step": null
    },
    {
      "depth": 12,
      "method": "clean_kp",
      "validation_nll": 2.6933349132537843,
      "wall_seconds": 13.416383028030396,
      "first_nonfinite_step": null
    },
    {
      "depth": 12,
      "method": "sdil",
      "validation_nll": 2.6933418989181517,
      "wall_seconds": 15.886815071105957,
      "first_nonfinite_step": null
    }
  ],
  "depth12_minus_depth4_nll": {
    "bp": 0.1983191967010498,
    "fa": 0.07540652751922616,
    "dfa": 0.11086342334747323,
    "clean_kp": 0.051169395446777344,
    "sdil": 0.0511782169342041
  },
  "summary": "All 15 trajectories are finite. Reciprocal KP/SDIL show the smallest short-budget depth degradation, but the clean-task KP/SDIL identity is not innovation evidence."
}