The video shows you can use a 'DocC Archive Hosting Base Path' to incorporate when building the Documentation via Xcode's Build Documentation action. However, for Swift Package only projects this isn't possible since we cannot provide build settings.

In the video the app entity type is called MeditationSession (10:09) but in the StartMeditationIntent the @Parameter's type is SessionType (11:16). Maybe it is a different type but from what I understand it should be the same since the disambiguation is done among SessionManager.allSessions which returns an array of MeditationSessions and the type of sessionToRun needs to match self.session.