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

487 B

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Decisions: rag-hybrid-search-rrf

Capability

sm-flow + OpenSpec fallback; apply pre-authorized.

Depends

Delivery 1 archived.

Grill (compressed, pre-authorized)

Q: Full BM25 schema now? A: No — sparse-lite + RRF first; schema rebuild follow-up.
Q: Default mode? A: dense default; hybrid opt-in.
Q: Threshold score? A: keep dense-compatible L2 mapping.

Design

Hybrid paths: dense unfiltered + dense filtered + lexical rank over union; RRF fuse by evidenceKey.