CAC CLI Framework

CAC (Command And Conquer) is a lightweight, dependency-free JavaScript library for building robust command-line interface (CLI) applications. The current stable version, 7.0.0, released in 2024, marks a significant transition to being ESM-only and requires Node.js 20.19.0 or newer. CAC differentiates itself by providing a minimal API surface (four core methods for basic CLIs) while offering powerful features such as default commands, Git-like subcommands, argument and option validation, variadic arguments, and automated help message generation. Its development is TypeScript-first, ensuring type safety and an enhanced developer experience. Release cadence is typically feature-driven, with breaking changes carefully documented in major version bumps and minor/patch releases focusing on stability and compatibility.