{
  "exclusions": [
    {
      "feature": "aroma_chemicals.openpom_embedding",
      "reason": "no provenance field or real model asset; implementation generates 128-bit Morgan plus 10 physicochemical descriptors"
    }
  ],
  "frozen_at": "2026-07-17T05:12:56.027886+00:00",
  "frozen_method": {
    "folds": "five deterministic grouped folds; CAS and formula families may not cross folds",
    "metrics": "Spearman rho/MAE for continuous; macro-F1/AUROC for categorical",
    "missing_values": "exclude a row from all representations if any preregistered input is missing",
    "probe": "standardized ridge regression for continuous targets; logistic ridge for categorical targets",
    "row_policy": "complete-case intersection per task, fixed before representation access",
    "selection": "regularization selected by nested CV using training folds only",
    "uncertainty": "paired fold deltas with percentile bootstrap 95% CI"
  },
  "representations": {
    "morgan": {
      "available": true,
      "definition": "RDKit Morgan radius=2"
    },
    "pom_plus_physics": {
      "available": false,
      "definition": "real_pom concatenated with preregistered physical features"
    },
    "real_pom": {
      "available": false,
      "definition": "independently loaded pretrained POM model output"
    }
  },
  "results": null,
  "schema_version": 1,
  "status": "blocked_missing_real_pom",
  "tasks": [
    "descriptor",
    "odor_threshold",
    "substantivity",
    "substitution"
  ]
}