Spicetify CLI is a command-line tool that allows you to customize the official Spotify client for Windows, macOS, and Linux. With Spicetify, you can change the look and feel of the Spotify client by modifying its theme, colors, fonts, and more. This tool is open-source and released under the LGPL-2.1 license. It provides an easy-to-use command-line interface to manage your Spotify client customizations. You can download the latest version of Spicetify CLI from its official GitHub releases page, and find support in the official Discord server. Note that this tool only modifies the client interface and doesn't affect the Spotify music streaming service itself.