Author

Xander Wu

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#machine learning Preprint Aug 2026

Learn What's Left, Not What's Mastered: Saturation Aware Advantage Reweighting for Multi-Reward Policy Optimization

Saturation Aware Advantage Reweighting for Multi-Reward Policy Optimization (SA-MRPO), which standardizes each reward objective independently and adaptively discounts its contribution according to a batch-level estimate of objective saturation, and dynamically reallocates optimization effort toward under-optimized obje...

Yi-Xuan Wang, Yi-Fei Chen, Haichao Zhang et al. · 3 citations · ⚡1

Preprint Aug 2026

Demystifying Agent Skills: Why They Work-Until They Don't

This work designs a contrastive study that combines controlled quantitative experiments with paired trajectory analysis and consolidates observations into a taxonomy of three high-level categories and twelve skill-use modes, showing that skills work when noisy trajectories become procedural anchors that stabilize execu...

Zhi-Yuan Jiang, Fan Huang, Hanwen Xing et al. · 4 citations · ⚡1