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arxiv_agent_systems_research · Nov 9, 2026 · paper
arxiv.orgNov 9, 2026
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In brief
When an LLM agent fails part-way through a long task, the usual analysis records a symptom: a failure-mode label, or the agent and step judged responsible. It does not say where the error entered, which state carried it to the symptom, whether anything in the trajectory contradic