It is the SmartThings Edge Drivers.
You can enroll the channel and install edge drivers by using invitation url
https://api.smartthings.com/invitation-web/accept?id=2d6da83b-ae22-4fda-8af5-bbb8890872d4
The source code required for installation can be found in each directory.
If necessary, you can manually install it by adding a fingerprinter.
Unlike the DTH(Device Type Handler), the Edge Driver uses the "Component", not the "Child Device".
A child device is recognized as a independent thing, while a component shows several buttons in one thing.
The difference is the use of a voice assistant.
Most voice assistants will be able to recognize only "Main" in Component.
Therefore, in the case of Button/Swith, the voice assistant may not be able to control the second Button/Switch set as Component.
It is released under the Apache 2.0 License.