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APEx: Distillation of Agent Procedural Experience for Adaptive Deep Research Question Answering

arXiv · AI, language, vision and robotics · article · Sep 2, 2026 · UTC

Deep research agents augment large language models with external tools to answer complex, long-horizon questions through multi-turn reasoning. Learning from prior experience is crucial for continual improvement, yet existing methods either retrieve verbose task-specific traces that burden decision-making, or distill procedural skills that remain decoupled from downstream policy adaptation. We propose APEx, a hierarchical experience utilization framework that organizes interaction history into instance-level trajectory memories and category-level procedural skills, and couples them through a cl

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