Hi, I like the idea of the Commander library https://github.com/dionisiydk/Commander <https://github.com/dionisiydk/Commander> I am trying to understand how to use it, but I struggle to understand it as documentation includes quiete complex examples: https://ci.inria.fr/pharo-contribution/view/Books/job/PharoBookWorkInProgres... <https://ci.inria.fr/pharo-contribution/view/Books/job/PharoBookWorkInProgres...> I believe that it would be useful to have a tutorial that shows: 1. create a command CmdOne including methods, 2. create a activator ActOne including methods, 3. create a context CtxOne including methods, 4. execute <I do not know what> and you obtain a collection with one item (CmdOne instance?) 5. create command CmdTwo with some methods 6. execute <I do not know what> and you obtain a collection with two items Then next section could describe how to make a UI on top of this. Learning it by exploring Calypso is too complex, because it involves more objects and I actually do not see how to do the previous steps. I will be happy to help with the documentation. My question is: How can I proceed the mentioned steps? Thanks, Juraj