Beyond Request-Response: Architecting Real-time Bidirectional Streaming Multi-agent System- Google Developers Blog

This post introduces a real-time bidirectional streaming architecture for multi-agent systems, moving beyond the limitations of request-response models. It details engineering challenges such as context management in a turnless world, concurrency and performance for streaming I/O, and developer experience. The Agent Development Kit (ADK) is presented as a solution, featuring a LiveRequestQueue for asynchronous I/O management, stateful and transferable sessions for multi-agent collaboration, event-driven callbacks (before_tool_callback, after_tool_callback) for customization, and streaming tools defined as AsyncGenerators.