The **mvdan/sh** repository provides a pure‑Go library for parsing, formatting (via the `shfmt` tool), and interpreting shell scripts with support for POSIX sh, Bash, Zsh and mksh. It is aimed at developers who need reliable programmatic manipulation of shell code (e.g., linters, IDE plugins, CI tools) as well as end‑users who want a fast, opinionated formatter and a lightweight interpreter for scripts.