{
  "schema_version": 2,
  "adapter_key": "upturn",
  "manifest_ref": "reproduction:upturn",
  "seeds": [
    42
  ],
  "diagnostic_only": true,
  "measured_locally": true,
  "evaluation_tier": "l0_contract",
  "metrics": {
    "retained_prefix_tokens": 200,
    "remaining_suffix_tokens_for_512_budget": 312
  },
  "evaluation_protocol": {
    "tier": "l0_contract",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "deterministic formula/behavior fixtures only; not capability evidence"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2610.13672-upturn/metrics/mechanism-contracts.json",
    "dataset_fingerprint": "deterministic-tensor-mechanism-fixture-v1",
    "code_revision": "working-tree implementation; GPU code revision is separate"
  },
  "limitations": [
    "仅公式与行为合同测量",
    "不是公开checkpoint训练效果",
    "不替代A100/A30 receipt或能力比较"
  ]
}