{
  "status": "training_calibration_not_holdout",
  "source_files": [
    "scalar-tune.csv",
    "baseline-tune.csv",
    "avx2-tune.csv"
  ],
  "machine": "AMD Ryzen 9 5900X",
  "compiler": "MSVC 19.51.36248 x64",
  "profiles": ["scalar", "baseline", "avx2"],
  "candidate_leaf_elements": [64, 128, 256, 512, 1024],
  "directory_fanout": 64,
  "observed_baseline_uint32_best_leaf": {
    "uniform_edit": {"10000": 64, "100000": 256, "1000000": 1024},
    "localized_edit": {"10000": 64, "100000": 128, "1000000": 256},
    "mixed_80_read": {"10000": 128, "100000": 512, "1000000": 1024}
  },
  "offline_oracle_speedup_over_fixed_leaf_512": {
    "slice": "levels=3, all three profiles",
    "all_profiles_and_tuning_cells_geomean": 1.3177000343,
    "random_access": 1.1216118941,
    "sequential": 1.0033368945,
    "uniform_edit": 1.5410722198,
    "localized_edit": 1.6731171394,
    "mixed_80_read": 1.3691280179,
    "warning": "Oracle knows the full cell and excludes online transition regret."
  },
  "implemented_rule": {
    "form": "local_move_cost(leaf,sizeof(T)) + directory_cost(N/leaf,locality) + lookup_cost(levels,top_nodes)",
    "tiered_directory_unit": 0.65,
    "localized_directory_multiplier": 0.15,
    "leaf_rebuild_safety": 2.5,
    "minimum_shape_improvement": 0.05,
    "confirmation_windows": 2,
    "note": "All constants remain replaceable through AdaptationConfig."
  }
}