Our Prossimo project has historically focused on creating safer software on network boundaries. Today however, we're announcing work on another critical boundary - permissions. We're pleased to announce that we're reimplementing the ubiquitous sudo and su utilities in Rust. Sudo was first developed in the 1980s. Over the decades, it has become an essential tool for performing changes while minimizing risk to an operating system. But because it's written in C, sudo has experienced many vulnerabilities related to memory safety issues.