Authors

Yixuan Li

Publications 4

Preprint Open access

UMR: Universal Manipulation Representation

Song Liu, Linyi Li, Yanshun Zhao et al. · 2026

General-purpose embodied manipulation hinges on a unified action representation that generalizes across embodiments and scales readily. Yet existing policies rely on embodiment-specific action spaces, making cross-embodiment demonstrations difficult to leverage at scale and limiting transfer to new embodiments and spat …

Preprint Open access

STEVE: Stabilizing Textual Gradient-Based Prompt Optimization via Error-Driven Refinement and Regularized Verification

Yifan Xu, Yixuan Li, Xinzhuo Li et al. · 2026

Textual-gradient methods automate prompt optimization through natural-language feedback, but their iterative updates can be unstable. We identify two sources of this instability: noisy gradients produced from already-correct examples and over-specialization to hard cases that degrades performance on simpler inputs. We …

Preprint Open access

In-Context Robot Learning with VLM Agents

Dongzhou Cheng, Taoran Yi, Ye Fang et al. · 2026

Enabling robots to adapt to unfamiliar environments as readily as humans remains a moonshot goal of embodied AI. No finite collection of demonstrations can cover every task and situation a robot will encounter, making the ability to learn from context at deployment essential for generalization. Such in-context learning …

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