2017-05-26 19:22 GMT+02:00 Thierry Goubier <thierry.goubier@gmail.com>:

This should work:

org := (RPackageOrganizer default packageNamed: 'MyPackage').
tag := org addClassTag: #Classes.
org definedClasses do: [ :aClass |
�� aClass category: tag categoryName�� ].

In Pharo 6 there is new tag API for classes:

#MyPackage asPackage definedClasses do: [:each | each tagWith: #Classes]