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Fei Sun

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Preprint Aug 2026

LongRCA Bench: Root-Cause Localization in Long-Horizon Agent Trajectories

This work proposes Root-Cause Trajectory Attribution (RCTA), a training-free method that organizes original candidate records and explicit handoff instructions for attribution that reaches 24.1% exact root-step accuracy and 51.1% responsible-role accuracy.

Yun-Fei Zhang, Bo-Yu Feng, Chang-Hua Pei et al. · 2 citations
#artificial intelligence Preprint Aug 2026

Detect Before You Attribute: Cascade Failure Attribution for Multi-Agent Systems

DUOTRACE follows a detect-before-attribute paradigm: it first detects anomalous executions and then supplies focused trajectory evidence to downstream LLM-based attribution methods, which improves agent-level and step-level attribution accuracy.

Jia-Yi Zhang, Ze-Xin Wang, DecisionMakingRon Sun et al. · 1 citation
Preprint Aug 2026

L ONG RCA B ENCH : D IAGNOSING R ESPONSIBLE R OLES AND R OOT C AUSES IN L ONG -H ORIZON A GENT F AILURES

This work introduces LongRCA Bench, comprising 1,140 failed trajectories across five domains without injected errors, and presents Root-Cause Trajectory Attribution (RCTA), a training-free method that retrieves candidate error steps from segment summaries and traces them to available earlier handoff instructions.

Yun-Fei Zhang, Bo-Yu Feng, Changhua Pei et al. · 1 citation

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