All of your tutorials, links, and/or instructions are dated and unhelpful.
Try having someone follow any of this step-by-step, from scratch, and see if they can get something working, because I, nor my partners can make any usable sense of what is presented about extensions and creating/testing them.
Why make it easy when it can be complicated.
Guys what's wrong with you guys?
Best Regards, Rango Volpa
Apologies for the outdated tutorial. We are aware and are mostly complete with its replacement. I'll make sure to follow up and close this UserVoice suggestion when it is completed.