feat(search-v2): add hybrid search with BM25 fusion and Cohere reranking#140
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DevanshuNEU merged 1 commit intoJan 4, 2026
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Closes OpenCodeIntel#70 Add hybrid search combining semantic and keyword matching: - HybridSearcher with BM25 + semantic fusion (RRF algorithm) - Cohere rerank-v3.5 for final result ordering - search_v2() method in indexer - Graceful fallback when Cohere unavailable - 8 tests passing (31 total for Search V2) Dependencies: rank-bm25, cohere Part 3 of 4 in Search V2 epic.
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Summary
Adds hybrid search combining semantic embeddings with BM25 keyword matching, plus Cohere reranking for optimal result ordering.
Closes #70
Changes
hybrid_searcher.pyindexer_optimized.pysearch_v2()methodrequirements.txtHow It Works
Configuration
# Required for reranking (optional - gracefully skipped if missing) COHERE_API_KEY=xxxTest Results
Part of Search V2 Epic