NVIDIA has announced an expansion of the NVIDIA Agent Toolkit for engineering, adding NVIDIA PhysicsNeMo and CUDA-X libraries as agent-ready tools and skills for product design and development workflows. NVIDIA has re-architected PhysicsNeMo into agent-friendly libraries and added new and updated CUDA-X libraries to the NVIDIA Agent Toolkit. PhysicsNeMo provides AI physics tools for training and deploying models, while CUDA-X libraries add accelerated solvers and quantum chemistry capabilities for engineering workflows. Key capabilities include AI physics skills from NVIDIA PhysicsNeMo libraries, iterative sparse solvers via NVIDIA cuISS, direct sparse solvers via NVIDIA cuDSS, and quantum chemistry via NVIDIA cuEST. Additionally, with ACE-RTL, a hardware design agent from NVIDIA Research, NVIDIA Nemotron 3 Ultra ranks among open models for agentic RTL coding on the Verilog design problems benchmark across RTL coding tasks. Nemotron 3 Ultra can be post-trained on proprietary data and deployed locally or on premises.