In the 1 September update they state they found that web client and a mobile client as well, but not the API (I guess) containing the system prompt and the actual routing to the models.
This article makes no sense in supporting the thesis.
It supports the thesis that Lumo is not open source in many common sense ways that most people would expect when a model claims it is open source. So in that sense, it does though.
Proton claiming shit that they don't actually do or can do?
Consider me shocked!