osiman/SuperBizAgent-java

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zhuyongxin 376ad0c241 feat(rag): hybrid multi-path search with RRF fusion

Add configurable hybrid mode on KnowledgeSearchPort that fuses dense
unfiltered, dense filtered, and lexical ranks via RRF while preserving
dense-compatible threshold scores. Archives Delivery 2 OpenSpec change.

2026-07-27 18:33:31 +08:00

580 B

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Acceptance: rag-hybrid-search-rrf

Result

Hybrid mode implemented on KnowledgeSearchPort:

dense unfiltered + dense filtered + lexical rank over union
RRF fusion by evidenceKey
dense-compatible score preserved for thresholds
default mode remains dense

Verification

mvn -q "-Dtest=RrfFusionTest,VectorKnowledgeSearchAdapterHybridTest,LookupKnowledgeToolTest" test

Pass.

Residual

True Milvus BM25/sparse schema + reindex still follow-up
Lexical path only ranks dense-recalled candidates (does not expand pure-term misses outside dense topK)