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Xuan Chen

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#artificial intelligence Preprint Sep 2026

When Harnesses Lose the Signal: Causal Evaluation of Recovery in LLM Agents

Large language model agents rely on external harnesses to pass information between the model and its environment and to recover from execution errors. Yet recovery is usually judged only by average task success. This hides an important tension. The same operation can rescue a failing trajectory or disrupt one that woul...

Shu-Yao Xiao, Sheng-Ling Wang, Xuan Chen et al. · 0 citations
#artificial intelligence Review Sep 2026

Search Shapes Conclusions: Auditing Evidence Selection Bias in Deep Research Agents

Deep Research agents synthesize evidence into cited reports, yet a well-cited report can still reach a misleading conclusion. Citation correctness checks whether cited sources support individual claims. It does not show whether adaptive search exposed a representative view of all documents made available for evaluation...

Shu-Yao Xiao, Sheng-Ling Wang, Xuan Chen et al. · 0 citations
#natural language process... Preprint Aug 2026

When Errors Become Memories: Causal Pathway Tracing in Multi-Turn Memory-Augmented LLMs

A structural causal model (SCM)-based framework for cross-turn error propagation in memory-augmented LLMs is proposed, and experiments show that error influence generally decays with interaction distance, while the memory-update pathway contributes more persistent effects than question feedback.

Shu-Yao Xiao, Sheng-Ling Wang, Xuan Chen et al. · 0 citations

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