Minor Changes #11062 `3ebd10a` Thanks @christian-bromann! - feat(langchain): surface tool-dispatched subagents on `run.subagents` Add a native subagent stream transformer to `createAgent` so v3 runs expose named nested agents (`createAgent({ name })` invoked from tools) as typed `SubagentRunStream` handles with `name`, `cause`, scoped `messages` / `toolCalls`, and `output`.

Refactors agent stream transformers into `agents/transformers/` and exports only the public stream types from the package entry.