The Cinnamon Session Manager is in charge of starting the core components of the Cinnamon desktop, and applications that should be launched at login time. It also features a way to save and restore currently running applications.
This package contains the binaries for the Cinnamon Session Manager, but no startup scripts. It is meant for those willing to start cinnamon-session by hand with the components of their choice, and for applications such as MDM that use cinnamon-session internally.