Microsoft opens WinUI 3 development on GitHub

Microsoft has officially transitioned the main development of WinUI, the native user interface framework for Windows 11, to GitHub. This move opens up the development process, allowing developers to create branches and submit pull requests for code review.

The initiative follows Microsoft's announcement over a year ago to open-source WinUI. By making the primary development public on GitHub, the company aims to foster a more collaborative environment for the framework's evolution.

Currently, all submitted pull requests originate from Microsoft's internal developers. This initial phase is being used to test the end-to-end development workflow before wider external contributions are fully integrated.

Microsoft had previously outlined a four-phase plan for the open-sourcing of WinUI and committed to providing regular progress updates. The shift to GitHub represents a key step in this strategy, intended to streamline Windows application development and enhance platform capabilities.