Janik gave a talk at the FOSDEM conference about the Runix tool, which is designed to provide a more user-friendly way of interacting with the Nix CLI from high-level programming languages. He explained the problems that arise from using the Nix CLI, including the need to manage context manually and the prevalence of errors caused by typos and string formatting issues. Runix offers a typed interface that can eliminate many of these issues and pave the way for more efficient and native backends in the future. Janik mentioned several possible use cases for the tool, including building custom Nix frontends, testing and mock backends, and implementing a dry run function.