Millennium is a framework for creating themes and plugins that modify the Steam Client interface.
The project addresses the limitation that Steam's official client offers minimal customization options. Millennium works by patching the Steam Client at runtime to inject custom code and styling, allowing developers to extend functionality and alter the visual appearance without modifying the base application. The framework provides APIs for both theme development, which handles visual customization through CSS-like styling, and plugin development, which enables functional extensions through code injection.
Developers should choose Millennium if they want to customize their Steam Client experience beyond what Valve provides officially, or if they are interested in building themes and plugins for distribution to other users. The project suits anyone comfortable with reverse-engineering and runtime patching techniques. It is not appropriate for users seeking officially supported customization or those unwilling to work with an unofficial modification framework.
The project maintains active development with regular commits addressing bug fixes, feature additions, and compatibility updates. The codebase shows ongoing refinement of the injection and patching mechanisms that form the core of the framework. Community contributions are regularly integrated, indicating sustained engagement from users building themes and plugins. The maintainers respond to issues and pull requests, suggesting continued investment in the project's stability and usability.
