Argo is a hypervisor-mediated data exchange technology developed for OpenXT, prioritizing isolation and access control while facilitating interdomain communication. It utilizes private ring buffers for data transfer, ensuring no memory is shared between VMs, and supports a range of operations for message passing. The lengthy development journey from 2011 to 2019 culminated in its inclusion in Xen 4.12, with numerous applications and future enhancements planned for inter-partition communication.