Current AI writing support tools are largely designed for individuals, complicating collaboration when co-writers must leave the shared workspace to use AI and then communicate and reintegrate results. We propose integrating AI agents directly into collaborative writing environments. Our prototype makes AI use visible to all users through two new shared objects: user-defined agent profiles and tasks. Agent responses appear in the familiar comment feature. In a user study (N=30), 14 teams worked on writing projects during one week. Interaction logs and interviews show that teams incorporated agents into existing norms of authorship, control, and coordination, rather than treating them as team members. Agent profiles were viewed as personal territory, while created agents and outputs became shared resources. We discuss implications for team-based AI interaction, highlighting opportunities and boundaries for treating AI as a shared resource in collaborative work.

翻译：当前AI写作辅助工具主要面向个体设计，当合著者必须离开共享工作空间使用AI，随后还需沟通并重新整合结果时，协作过程变得复杂。我们提出将AI代理直接集成到协同写作环境中。我们的原型系统通过两种新型共享对象——用户定义的代理配置文件与任务——使所有用户都能直观感知AI使用状态。代理响应通过熟悉的评论功能呈现。在一项用户研究（N=30）中，14个团队在一周内开展了写作项目。交互日志与访谈表明，团队将代理纳入现有的作者身份、控制与协调规范中，而非将其视为团队成员。代理配置文件被视为个人领域，而创建的代理及其输出则成为共享资源。我们探讨了团队化AI交互的启示，强调在协作工作中将AI视为共享资源所面临的机遇与边界。