{
  "model": "mistralai/Mistral-7B-v0.3",
  "training_type": "closed_loop_retrieval",
  "steps": 2000,
  "lr": 0.001,
  "alpha_rank": 1.0,
  "beta_retrieve": 2.0,
  "gamma_stability": 0.05,
  "heuristic_init": false,
  "scoring_contract": {
    "aggregation": "arithmetic mean of all token scores per passage",
    "score_source": "ImportanceUpdateHead.direct_score(hidden) \u2014 raw logits (no sigmoid)",
    "direction": "descending (high-first) \u2014 validated 2026-08-01",
    "passage_encoding": "each passage encoded independently (no query context in scoring call)",
    "normalization": "none",
    "query_relevance_status": "context-utility signal; calibrated query-relevance not demonstrated (MRR delta=-0.006, 95% CI [-0.051,+0.041])",
    "validation_scripts": [
      "scripts/validate_score_direction.py",
      "scripts/test_query_specificity.py"
    ],
    "validation_results": [
      "results/score_direction_validation_summary.csv",
      "results/query_specificity_summary.csv"
    ],
    "github": "https://github.com/nitroxido/token-importance-scoring"
  }
}