streaming from modern agents is pretty complex! especially with - parallel tools / subagents - multimodal content - human in the loop events…

streaming from modern agents is pretty complex! especially with - parallel tools / subagents - multimodal content - human in the loop events our new streaming primitives make all of this ergonomic! Agent streaming has outgrown token deltas. Real apps need to render tools, state, subagents, media, interrupts, and reconnects without parsing a firehose of raw events. The new @LangChain streaming protocol turn agent runs into typed projections apps can subscribe to.

Source: Harrison Chase (X) | 2026-05-21