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Beyond Semantic Similarity: Rethinking Retrieval for Agentic Search via Direct Corpus Interaction
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Beyond Semantic Similarity: Rethinking Retrieval for Agentic Search via Direct Corpus Interaction

arXiv.org·[Submitted on 3 May 2026]·20 days ago
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Modern retrieval systems, whether lexical or semantic, expose a corpus through a fixed similarity interface that compresses access into a single top-k retrieval step before reasoning.…

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When the Reranker Hurts: Recall@5 Cases Where Two-Stage Retrieval Loses to One
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When the Reranker Hurts: Recall@5 Cases Where Two-Stage Retrieval Loses to One

DEV Community·Gabriel Anhaia·about 1 month ago
#HfIB3aD1
#ai#rag#llm#reranker#query#encoder

Cross-encoder rerankers don't always help. Four cases where two-stage retrieval drops recall@5 below the bi-encoder, with code and a decision rule.

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RAG Without Embeddings: When BM25 Beats Your $0.20-per-1K Vector Index
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RAG Without Embeddings: When BM25 Beats Your $0.20-per-1K Vector Index

DEV Community·Gabriel Anhaia·about 1 month ago
#mVHgl7RK
#when#rag#bm25#dense#corpus#retrieval

BEIR still shows BM25 holding its own on exact-match domains. Here is the decision rule, the Postgres setup, and when hybrid actually pays.

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Corpus Christi is on track to be the first American city to completely run out of water, as its reservoirs near empty following a five-year drought.
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Corpus Christi is on track to be the first American city to completely run out of water, as its reservoirs near empty following a five-year drought.

Reddit r/environment·u/Wagamaga·about 1 month ago
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#corpus#christi#track#first#american#photo

From Reddit - r/environment: Corpus Christi is on track to be the first American city to completely run out of water, as its reservoirs near empty following a five-year drought.

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5 RAG Failure Modes Nobody Warns You About in the Tutorials
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5 RAG Failure Modes Nobody Warns You About in the Tutorials

DEV Community·Gabriel Anhaia·about 1 month ago
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#ai#rag#llm#database#chunks#eval

The five RAG failures that survive your eval suite and break in production. Each one with a small mitigation snippet you can paste in today.

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