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{
  "representation": {
    "F": 4,
    "B": 64,
    "S": 16,
    "L": 12,
    "tau": 20,
    "beta": -0.2
  },
  "routing": {
    "gamma_tail": 0.25,
    "lambda_membership": 0.125
  },
  "early_rescue": {
    "idf_power": 1.0,
    "length_b": 0.2
  },
  "final_chunk_score": {
    "idf_power": 2.0,
    "length_b": 0.1,
    "coordination_alpha": 0.25,
    "lambda_lex": 4.0,
    "lambda_sem": 0.3,
    "rare_topk": 3,
    "rare_weight": 1.0,
    "semantic_k": 16
  },
  "top10_set_selection": {
    "branch_quality_top_docs": 3,
    "eligible_high_quality_branches": 10,
    "lambda_diversity": 0.1,
    "rank1_pure_relevance": true,
    "repeated_branches_allowed": true
  },
  "rag_pool": {
    "tested": [
      25,
      50,
      100,
      200,
      500,
      2000
    ],
    "large_route_provisional": 100,
    "note": "Pool size is a RAG top-10 handle, not a deep-recall constant. Small-route corpora may prefer no additional pruning."
  }
}