SmartThings staff have provided a number of tutorials in the tutorial section of this forum which may be of interest to those writing edge drivers. For example, there is one on writing a Z wave edge driver, one on writing a Zigbee edge driver, and one on the CLI (command level interface) which may be helpful if you don’t already have the CLI installed.
To find these, just go to the tutorial section of this forum:
Also, the official developers blog had a really nice overview of edge: