SkillHarness: Harnessing Safe Skills for Computer-Use Agents

SkillHarness is a new framework designed for safe skill learning in Computer-Use Agents (CUAs) operating in dynamic environments. It introduces the concept of a skill boundary that utilizes multi-source supervision signals to identify safe skills and implements self-improving safety constraints throughout the skill lifecycle. Experimental results indicate that SkillHarness reduces the unsafe rate of learned skills by 57.1% and enhances execution stability, making it a significant advancement for practitioners focused on developing reliable CUAs in unpredictable settings.