The Origins of SteamOS DevKit Client

SteamOS DevKit Client is written in Python. All you have to do is give your game a name and it sends it over the network to your steam deck. It launches just like any other game that you installed from Steam, but this came over the wire from your developer workstation. So I'm wondering if this is what Chimera OS must be using under the hood to do all of its magic with the third party game stores and the other games that you can just lob at it.