Building CLI Apps with Rapp Rapp (v0.3.0) is an R package that provides a drop-in replacement for that automatically parses command-line arguments into R values. It turns simple R scripts into polished CLI apps with argument parsing, help text, and subcommand support — with zero boilerplate. R ≥ 4.1.0 | CRAN: | GitHub: After installing, put the launcher on PATH: This places the executable in (macOS/Linux) or (Windows). --- Core Concept: Scripts Are the Spec Rapp scans top-level expressions of an R script and converts specific patterns into CLI constructs. This means: 1. The same script works…