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Yiran Dou

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Book Open access Aug 2026

SkillTracer: Structural Failure Attribution and Refinement of Agentic Skills in Long-Horizon Web Tasks

Long-horizon web agents frequently fail without knowing where or why execution broke down. This issue is particularly pronounced in skill-based agentic web systems, where failures arise within composite skills whose internal decision processes are not directly traceable, making precise diagnosis and repair especially d...

Yuyang Li, Yiran Dou, Jiejing Shao et al. · 5 citations

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