NGRX Traits is a library to help you compose and reuse state logic in your angular app. There is two versions, @ngrx-traits/signals supports ngrx-signals, and @ngrx-traits/{core, common} supports ngrx.
A source code only package which allows you to use C# 9's init and record features in older target frameworks like .NET Standard 2.0 or the "old" .NET Framework by providing a polyfill for the IsExternalInit class.