Rash

You'd reach for this when you need to generate shell scripts but want the type safety and correctness of Rust. It transpiles Rust code into POSIX-compliant shell scripts with formal verification, which means you can write your automation logic in a real programming language and get portable shell output that actually works across different environments. The formal correctness guarantees are the key bit here, they ensure the transpiled shell behaves as your Rust code specifies. This bridges the gap between wanting Rust's safety features and needing the universal runtime availability of shell scripts. Useful for build tools, deployment scripts, or any automation that needs to run everywhere without binary distribution.