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Author

Jiafeng Guo

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Book Open access Jul 2026

Is a Busy Search Agent a Good One? Overthinking and Overretrieval at Scale

This work conducts a systematic study of overthinking and overretrieval in search agents from a scaling perspective and proposes a lightweight post-hoc reflection framework that converts the proposed evaluation signals into explicit feedback rewards to guide agents' reasoning trajectories.

Xin Liu, Ruqing Zhang, Yu-An Liu et al. · 0 citations
Conference Open access 2026

Stop Hardening Everything: A Training-Free Neuron-Level Defense for Neural Ranking Models

This paper introduces Search in the Model, a novel training-free framework that performs fine-grained identification and rectification of vulnerable neurons directly within the model, and develops a maximum marginal vulnerability criterion to precisely locate the top-K neurons most responsible for model vulnerability.

Yuansan Liu, Ruqing Zhang, Hongru Song et al. · 0 citations

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