[Bedwyr]

Usually the Steam add-on is separate in the program add-on category and I create a custom menu item linking to the add-on and go from there. It would be pretty neat to have the game library simply have external launchers like it's a generalized "All of your games and game services" bucket. Possible?

I totally understand if that's infeasible and, well, kinda "That's not how any of this works".

[Bedwyr]

Ok, I misunderstood where development is, nevermind disregard.: https://kodi.wiki/view/Game_management

[garbear]

I use the Steam Add-on to browse my steam library:



I include a repo for this add-on in my test builds:

https://github.com/garbear/xbmc/releases

[chrisism]

Maybe a bit late reply, but you can also check out AKL addon.
This works similar like other launcher addons, but has a wider range of support for launching, collection, scraping metadata and images for games. This includes Steam support.