Papers/2609.02889
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Where Does Harness-Optimization Value Live? Localized Gains and the Budget-Splitting Trap in Self-Evolving LLM Agents

Not provided in the abstract

harness optimizationbudget allocationlarge language modelsagent evolution
2609.02889
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1h ago

Abstract

This paper investigates the optimization value in the harness of large language models, revealing that significant gains are localized in the reflection/control slot and that uniform budget splitting can be detrimental.

Reality Card

Core Claim

The study demonstrates that nearly all useful optimization value in harness evolution is found in the reflection/control slot, and that uniform budget splitting can hinder performance.

Method / Result

HARNESSEVO achieved a leave-one-in gain of +0.119 in the reflection/control slot.

Limitations

The results are task-contingent, with some tasks showing no improvement, indicating potential limitations in generalizability.

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