SonarQube has a wonderful support external Roslyn rules. When violated they show up in PR’s just is Sonar’s rules. When clicked on, you are navigated to an URL like this:
https://sonarcloud.io/organizations/my_organization/rules?open=external_roslyn%3AProj0501&rule_key=external_roslyn%3AProj0501
The page shows a lot of what is described by those rules via its DiagnosticDescriptor, but an important feature: the HelpLinkUrl is not displayed. It would be nice if this could be added: the help link provides a lot of extra information in most cases.
(In this case the descriptor contains this url: Proj0501: Package only contains a deprecated license URL | .NET project file analyzers)