This UML refactoring exercise is aimed at less technical people like analysts, testers and other non-programmers. The key takeaway message is clarifying the need for continuous refactoring to people who do not code on a daily basis.
If you want to get started quickly, just copy the contents of plantuml/gilded-rose.puml, and paste it in https://www.planttext.com/
Several alternatives are available to render PlantUML, see https://plantuml.com/running.
For the syntax of activity diagrams in PlantUML, please refer to https://plantuml.com/activity-diagram-beta
You can run this exercise as a workshop.
During this workshop, you start off with a presentation explaining the domain, while filling out the testcases found under plantuml/workshop. After that, participants are invited to refactor the UML Activity Diagram, using the examples that were discovered during the presentation.
The google slides can be found here.
If you want to illustrate how this activity diagram got to this state, you can show the requirements and the files under the /history directory. These individual files show the evolution of the activity diagram.
