v0.7.0

What's New

• alpha="auto" in log_odds_conjunction for automatic confidence scaling (sqrt(n) scaling law, Paper 2 Section 4.2)
• AttentionLogOddsWeights for query-dependent signal weighting (Paper 2 Section 8) with batch fit() and online update()
• ReLU/Swish gating in log_odds_conjunction (Paper 2 Theorems 6.5.3/6.7.4) for sparse non-negative priors
• base_rate_method parameter in BayesianBM25Scorer: "percentile" (default), "mixture" (EM), "elbow" (knee detection)
• MultiFieldScorer for first-class multi-field search with per-field BM25 indexes and log_odds_conjunction fusion
• RetrievalResult dataclass for explainable retrieval with per-document BM25SignalTrace
• add_documents() for incremental indexing in both BayesianBM25Scorer and MultiFieldScorer
• CalibrationReport and calibration_report() one-call diagnostic bundling ECE, Brier score, and reliability diagram
• 16 zero-shot fusion methods in BEIR hybrid benchmark with calibration diagnostics

BEIR Hybrid Search (NDCG@10 Average)

Method	Avg NDCG@10	Delta vs BM25
Bayesian-Balanced	41.50	+6.12
Balanced-Mix	41.50	+6.12
Balanced-Elbow	41.50	+6.13
Convex	41.15	+5.78
RRF	40.48	+5.10
BM25	35.38	--

Full results: https://github.com/cognica-io/bayesian-bm25#beir-hybrid-search

Install

pip install bayesian-bm25==0.7.0