What the LangGraph reimplementation establishes institutionally is less about LangGraph specifically and more about which layer of the AI stack Rust developers have decided to contest. Graph execution, state handling, and node routing are not user-facing features — they are the substrate that determines whether an agent system behaves predictably under load. The choice to rewrite at this layer, rather than build wrappers or bindings, reflects a judgment that Python's architectural constraints are not incidental bugs but structural limits that compound in production. Projects like [AgnosAI's replacement of Python/CrewAI with…