@agners Wondering if you could ask the other Nabu Casa developers what the plan is for the new Matter integration and if they will consider use re-use (or fork) the existing zigpy library (that the existing ZHA integration uses a dependency) in your Matter implementation for Home Assistant as well?
The reason for asking that specifically is because the existing zigpy library contains a “Zigbee Cluster Library” (ZCL) that follows the specification standards by Connectivity Standards Alliance (CSA, formerly Zigbee Alliance) which if I understand correctly also plays a part in the Matter standard for Thread based devices?
I am also wondering if you have considered what programming language that the Matter components and dependency libraries will be coded in? …will they be written primarily in Python like Home Assistant?
Reason for that question is that just read in the latest Home Assistant newsletter that Dominic Griesel (a.k.a. AlCalzone on GitHub) from the Z-Wave JS project will join Nabu Casa later this month to focus on further improving Z-Wave JS and will help Home Assistant in adopting the new Matter (formerly CHIP) standard.
So the question is really if the existing zigpy library can be re-purposed in a Matter implementation for Home Assistant and by doing so hopefully be able to share developers with ZHA and other zigpy based projects and that way be maintained by more developers.