{
  "schema": "szl.model-source-attestation/v1",
  "model": {
    "id": "SZLHOLDINGS/szl-ouroboros",
    "repository_type": "model",
    "artifact_kind": "kernel-code-and-configuration + trained surrogate (model.joblib)",
    "trained_weights_present": true,
    "stdlib_only": false,
    "torch_required": false,
    "surrogate": {
      "file": "model.joblib",
      "sha256": "6c4067810eb508dfb61f3cfaf84b6db81cf2f7c78286f02e786205e0b014ac65",
      "role": "loop-tax regressor (predicts kernel-derived overheadMs) \u2014 kernel remains sole ground truth",
      "fidelity_MEASURED": {
        "held_out_MAE_ms": 15.5853,
        "held_out_R2": 0.9822,
        "held_out_target_std_ms": 191.079
      },
      "receipt": "TRAINING_RECEIPT.json",
      "reverify": "python scripts/eval.py"
    },
    "stdlib_only_note": "kernel package itself stays stdlib-only; the OPTIONAL surrogate needs sklearn+joblib"
  },
  "source_of_record": {
    "state": "VERIFIED_HF_SOURCE_OF_RECORD",
    "platform": "huggingface",
    "repository": "SZLHOLDINGS/szl-ouroboros"
  },
  "mirrors": {
    "live_surface": "a11oy backbone loop tax (artifacts/api-server/src/lib/backbone.ts buildLoopTrace/sumAttemptMs/peakAttemptMs/deadHopMs)",
    "timing_basis": "LOOP_TIMING_BASIS carried verbatim from backbone.ts",
    "lean_repo": "szl-holdings/lutar-lean",
    "doi_lutar_lean": "10.5281/zenodo.20434308"
  },
  "verification": {
    "tests": "13/13 passed",
    "tests_basis": "MEASURED local python3 -m pytest run, stdlib-only, offline",
    "falsifiability": "arithmetic is falsifiable (a wrong split flips the asserts); an unmeasured wall yields overheadMs=None (UNAVAILABLE, not fabricated); a missing latency raises; a budget violation is surfaced"
  },
  "lambda": {
    "status": "Conjecture 1 (open) \u2014 uniqueness unproven",
    "touched_by_this_artifact": false
  },
  "claims": {
    "trained_model": "CLAIMED \u2014 sklearn HistGradientBoostingRegressor, MEASURED, receipted",
    "reproducible_build": "NOT_CLAIMED",
    "weights_present": "model.joblib (sklearn surrogate; kernel stays weightless)"
  },
  "limits": [
    "The trained surrogate APPROXIMATES the kernel's DERIVED overheadMs from trace shape; it does NOT replace the kernel's exact arithmetic, which remains authoritative.",
    "Runs with an unmeasured wall (overheadMs=None / UNAVAILABLE) are dropped from training \u2014 never fabricated.",
    "modelMs and peakAttemptMs are MEASURED (upstream wall windows); overheadMs, serializationTaxMs and deadHopMs are DERIVED arithmetic on those measurements \u2014 never new claims.",
    "serializationTaxMs is a COUNTERFACTUAL (what a perfectly-parallel loop could save), never a realized saving \u2014 Alloy's loop is strictly sequential.",
    "deadHopMs is an upper bound only \u2014 Alloy does not prefetch.",
    "overheadMs is UNAVAILABLE (None) when the run wall was not measured \u2014 never fabricated.",
    "No .bin, .safetensors, .pt, .pth, .onnx, or .gguf weight artifact is present.",
    "Loop-tax accounting does not prove or upgrade \u039b, which remains Conjecture 1 (open)."
  ]
}