Want to develop for the Steam Deck / SteamOS and get testing? Now it's a whole lot easier, as Valve has now put up the tools needed under open source licenses.
There's two projects included with the SteamOS Devkit Client and the SteamOS Devkit Service, both of which are available on their GitLab page. Setting it up, at least on Linux, was pretty painless thanks to the clear instructions so even someone like me can give it a try and see what it's like.
With this, developers can easily upload builds from one device to a Steam Deck to easily begin testing. Available to developers anyway but now they don't have to be approved by Valve, as anyone can just grab it. It has a number of other interesting tools to control a Steam Deck remotely too, like forcing it to drop into Desktop Mode or back to Deck UI mode ("Gaming Mode").
Nice to see Valve continue putting more out in the open. This means others can test, report issues and perhaps even contribute code back to improve it further or even hack away at it to use it for other things.