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StainFlow: Entity-Stain Tracking and Evidence Linking for Process Rewards in GUI Agents

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arXiv:2606. 07027v1 Announce Type: new Abstract: Reinforcement Learning (RL) has become a promising approach for improving GUI Agents in long-horizon, stochastic digital environments, but trajectory-level success feedback is too sparse to provide reliable credit assignment for intermediate exploration steps.

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Authors: Haojie Hao, Longkun Hao, Yihang Lou, Yan Bai, Zhenyang Li, Zhichao Yang, Dongshuo Huang, Hongyu Lin, Lanqing Hong, Jiakai Wang, Xianglong Liu
Released: 2026-06-08 (1mo ago)
Topic: Related to current project
Relation to my work: Read next because StainFlow: Entity-Stain Tracking and Evidence Linking for Process Rewards in GUI Agents overlaps with clean result "Only continuous soft prefixes hit both EM axes at once on Qwen-2.5-7B-Instruct: discrete prompt searches split between the alignment objective and the distributional objective, and both discretizations of the soft prefix collapse (MODERATE confidence)", clean result "The marker is a representational handle, not a behavioural one — sharing it between a villain persona and the assistant transfers no misalignment (HIGH confidence)", experiment "#351 follow-up: broader-vocab position-0 sweep at T=1.0 + position-1 suffix isolation". Matching terms: eval, line, rate, position, candidate, lora, completion, model. Source: arxiv cs.AI (Artificial Intelligence).
arXiv: 2606.07027

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