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Wonjoong Kim

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#artificial intelligence Preprint Oct 2026

ActiveSaddler: Automated Curriculum Learning for Agent Harness Optimization

Automated harness optimization can substantially improve LLM agents by iteratively updating their prompts, tool interfaces, and control logic from execution feedback. However, existing methods primarily optimize how the harness is updated while largely fixing which training scenarios generate the feedback that drives t...

Sungho Park, Wonjoong Kim, Jue Zhang et al. · 0 citations

PAIR: Prefix-Aware Internal Reward Model for Multi-Turn Agent Optimization

The Prefix-Aware Internal Reward (PAIR), a two-stage model with a frozen hidden-state probe estimating belief-consistency and a lightweight attention-based head correcting it toward grounded correctness, is proposed, enabling dense step-level reward signals for GRPO training without external model calls, ground-truth d...

Wonjoong Kim, Yeonjun In, Sangwu Park et al. · 5 citations
Preprint Aug 2026

AutoSaddler: Automatic Harness Optimization with Durable Updates from Agent Execution Traces

The proposed AutoSaddler, an automatic harness optimization framework that formulates harness improvement as an offline learning problem and iteratively updates the harness using failure signals from mini-batches, suggests that automatic harness optimization is a promising path toward more performant and reliable agent...

Sungho Park, Wonjoong Kim, Rongyuan Tan et al. · 15 citations · ⚡1

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