I used the phrase
bpy.app.driver_namespace to create a function for scripted expansion that can be used in the driver and it works well in the local character file.
However, when I try to bring my character through a link in another blend file, the text is missing text. To use the character, you had to manually link text to set the execution and registration options.
However, the latest characters in Blender cloud, such as Spring and Rain, automatically come in with text when link.
How do I achieve this?