Author

Qi-Song He

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#artificial intelligence Preprint May 2026

PrefixGuard: Online Failure Warning and Trace-Grounded Diagnosis for LLM Agents

This work introduces PrefixGuard, a neuro-symbolic method that uses learned events to connect online failure warning with finite-state execution diagnosis with finite-state execution diagnosis in large language model (LLM) agents.

Xin-Miao Huang, Jinwei Hu, Qi-Song He et al. · 1 citation