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Li Gu

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#machine learning Preprint Sep 2026

One Rollout Is All You Get: Fully Test-Time Adaptation for GUI Agents

GUI agents are deployed with frozen weights and discard everything they experience on the job. Existing ways to update an agent's weights assume something deployment withholds: ground truth, rollouts beyond the single attempt (retries, samples, practice runs), or a learning phase other than deployment. Because GUI acti...

Zi-Qiang Wang, Li Gu, Zhixiang Chi et al. · 0 citations
Preprint Aug 2026

From Visual Widgets to UI Code: Efficient Tool-Grounded Generation

This work introduces WidgetGen, a lightweight tool-grounded framework that extracts observable text and color evidence, performs high-level layout and optional chart reasoning, and directly generates executable JavaScript XML (JSX) while avoiding a fixed UI schema.

Houston H. Zhang, Tao Zhang, Li Gu et al. · 0 citations
Preprint Aug 2026

Benchmarking LLM Judges for Mobile Agent Evaluation

This work introduces MobileJudgeBench, a benchmark for systematically evaluating LLM-as-judge methods on mobile agent trajectories, and reveals benchmark quality metrics reliably predict real-world judge utility.

Zi-Qiang Wang, Li Gu, Zhixiang Chi et al. · 0 citations
Jul 2026

DA-MergeLoRA: Hypernetwork-Based LoRA Merging for Few-Shot Test-Time Domain Adaptation

A new FSTT-DA framework that integrates LoRA fine-tuning with model merging and proposes a hypernetwork trained via meta-learning that generates per-column merging factors to combine LoRA modules to adapt the learned knowledge to a specific target domain.

Siobhan Reid, Zhixiang Chi, Li Gu et al. · 0 citations
Preprint Aug 2026

StepReflect: Structured UI Transition Reflection for Mobile GUI Agents

StepReflect is proposed, which formulates per-step GUI reflection as supervised structured prediction conditioned on explicit transition specifications and paired visual evidence, and established as a practical, locally deployable alternative to repeated frontier-model reflection for long-horizon mobile GUI agents.

Lin-Qiang Guo, Wei Liu, Li Gu et al. · 0 citations

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