Crules is a command-line utility that streamlines the management of Cursor AI rules by combining global project guidelines with language-specific rules. It provides a centralized way to maintain consistent coding standards across different programming languages while allowing for language-specific customizations. The tool supports automatic setup, rule backups, and comes with predefined rules for Python, JavaScript, Java, Perl, and Lua. Built with Python, it offers a simple interface for developers to manage their Cursor AI configurations through an easy-to-use command-line interface.