One of the biggest challenges with agents is that they produce way more than just tokens. Tool calls. State updates. Intermediate reasoning.…

One of the biggest challenges with agents is that they produce way more than just tokens. Tool calls. State updates. Intermediate reasoning. Subagent progress. File changes. Custom events. Structured UI payloads. You often want to stream all of that somewhere: terminals, web apps, IDEs, dashboards, generative UI, observability systems, etc. Really excited about the new @LangChain streaming primitives announced by @hwchase17 at #interrupt today. They make building rich real-time agent experiences dramatically easier and performant, especially when using tons of subagents. Been contributing to this effort and I think this is a foundational piece for the next generation of agent UX. Cookbook + examples: https://github.com/langchain-ai/streaming-cookbook

Source: Harrison Chase (X) | 2026-05-13