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arxiv_cs_ai · Jul 24, 2026 · paper

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The Regression Tax: Decomposing Why Skills Help and Hurt LLM Agents

arxiv.orgJul 24, 2026
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In brief

Adding procedural skills to an LLM agent is typically evaluated by average improvement in task success. However, this metric hides an important cost: skills can also make agents worse. We measure both sides by compari...

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The Regression Tax: Decomposing Why Skills Help and Hurt LLM Agents

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