
The Package Support Framework (PSF) was originally a Microsoft open-source project to help Win32/DotNet applications run when inside an MSIX Container. TMurgent has taken up the support for the PSF in our own fork here on GitHub.
Version v.2026.07.01 released. It only has some changes to the debugging information, nothing operational. You can find the release (and source code) …
TMEditX Editor is the licensed and much more capable tool for fixing up MSIX packages, better than PsfTooling since it doesn’t have to depend on the Microsoft MSIX Packaging Tool to create the final package. 
