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Shi-Ji Zhou

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#artificial intelligence Preprint Sep 2026

Beyond Timestamps: Decision-Aligned On-Policy Distillation for Long-Horizon Agents

AlignOPSD is introduced, following the principle of aligning supervision before assigning credit, which outperforms both GRPO and StepOPSD across all eight backbone--aggregate-metric comparisons, improving on GRPO by 5.5--8.7 \% and ranking first in six.

Ming-Ju Chen, Can-Can Lv, Jin-Rong Liu et al. · 0 citations
Preprint Aug 2026

TRCA: Transition-wise Rubric Credit Assignment for Long-horizon LLM Agents

Transition-wise Rubric Credit Assignment (TRCA) is proposed, which derives step-level supervision directly from action-induced transitions without learned evaluators or successful anchors for long-horizon tasks with sparse successful anchors.

Huan-Xi Zhang, Ming-Ju Chen, Dongxu Zhou et al. · 5 citations

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