多机器人协作的扩展性难题被VLA模型破解了——做机器人集群部署的团队可以直接参考CHORUS的零通信方案，省去复杂的对齐和通信模块。
多机器人协作在移动场景中面临扩展性差和部分可观测性问题。CHORUS框架利用预训练视觉-语言-动作（VLA）模型的视觉运动先验，使每个机器人仅依赖自身局部观测和身份提示即可独立运行，无需推理时通信或显式对齐。在移动测量、图书交接和洗衣篮搬运等真实实验中，CHORUS相比从零训练的分散模型提升64%性能，对队友行为的反应性提高40%，并超越集中式基线。该工作表明，共享VLA骨干网络足以实现去中心化多机器人协作，无需为每个机器人单独训练策略。
CHORUS: Decentralized Multi-Embodiment Collaboration with One VLA Policy
Multi-robot collaboration allows robots to efficiently take on a wide range of tasks, from moving a couch through a doorway to assembling structures on a construction site. However, achieving such coordination in mobile multi-robot settings remains challenging: centralized methods conditioned on the combined observations of a team scale poorly with team size, and decentralized methods that train one policy per robot often require explicit alignment procedures or information sharing at inference time to overcome partial observability. Our key insight is that the visuomotor priors of pretrained vision-language-action (VLA) models should enable reactive, decentralized collaboration from each robot's local observations alone, without these inference-time assumptions. We propose CHORUS, a framework that adapts a single VLA backbone to control diverse, multi-robot teams. At inference time, each robot runs an independent copy of CHORUS, conditioned only on its own observations and a robot-identifying prompt. In real-world experiments including mobile tape measurement, library book handovers, and laundry basket lifting, CHORUS achieves a 64% point improvement over decentralized, from-scratch models, improves reactivity to teammate behavior by 40% points, and outperforms centralized baselines. Together, these results show that a shared VLA backbone is capable of achieving decentralized multi-robot collaboration, without per-robot policies or inter-robot communication at inference.