Mercurial is an open-source, distributed version control system that caters to projects of all sizes while providing a user-friendly interface. It adeptly manages projects regardless of their complexity, ensuring that each clone retains the entire project history, which allows most operations to be performed locally, quickly, and conveniently. With support for a diverse range of workflows, Mercurial also allows users to easily augment its capabilities through extensions. The tool is designed to fulfill its promises, as many operations tend to succeed on the first attempt without needing specialized knowledge. Users can enhance Mercurial’s features by activating the official extensions included with the tool, downloading additional ones from the wiki, or even developing their own custom extensions. These extensions, crafted in Python, can modify the fundamental commands, introduce new ones, and access all core functions of Mercurial, making it a highly adaptable tool for version control. Ultimately, Mercurial empowers users to tailor their version control experience according to their specific needs and preferences.