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About this paper

Yijia Shao, Song Bian, Junxian Guo, Jindong Jiang, Zhen Dong, Huizi Mao, Diyi Yang, Song Han

Coco learns when to offer help by having an Observer Agent interpret screenshots, retain work context, and adapt its intervention decisions from engagement, rejection, and possible missed opportunities. On OSWorld-Persona, Coco-PE with Qwen-3.5-9B reaches macro F1 0.4832, versus 0.1861 for direct prompting, averaged over four personas. The gain also brings a higher false-alarm rate, so it does not show fewer interruptions.

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