NVAPI is NVIDIA's core software development kit that allows direct access to NVIDIA GPUs and drivers on supported platforms, and it's now been put up on GitHub.
Without any additional commit messages except the repository description, Nvidia posted the source code for its Developer Kit tool on Github under the NVIDIA Corporation organization umbrella.
This is the SDK Windows has been needing to get direct access to Nvidia GPUs, so I guess this opens up some things to developers and such, but why you'd want to run DL/ML software on Windows 🤷