Atomistic simulation requires three things: knowledge of the science, compute-efficient implementation of simulations, and accessible interfaces to the... NVIDIA ALCHEMI Toolkit leverages AI coding agents to address these needs. The toolkit provides a framework for building custom simulations, integrating existing simulation tools, and automating workflows. The agents can generate code for common simulation tasks, reducing the need for manual coding and accelerating the development process. This allows engineers to focus on the scientific aspects of the simulation rather than the implementation details.