## Brut: Brutal Router for Unix Tools This is the annotated source code for Brut, the Brutal Router for Unix Tools, a single-file POSIX shell script for building Unix command-line programs. It serves as the front-end executable for such a program, dispatching (or “routing”) to a collection of commands based on its filename and the first argument passed to it, a style popularized by the Git CLI. Brut is a cornerstone of the Brutal Unix project. ## 1 Introduction Using Brut, you can create programs that are highly portable, able to run on any contemporary Unix system with no runtime…