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.
176 B
176 B
Evidence
- Delivery 1 identity/port foundation required
- RRF utility and hybrid adapter unit tests green
- Lexical sparse-lite intentionally intermediate until BM25 schema