X sessions don't launch Xorg

[TLATER]

Forgive me if I misunderstand something myself here, but aiui, the X session commands defined in /usr/share/xsession expect to be executed in an already running X server. regreet does not launch an X server before executing those scripts, and therefore does not seem to be able to launch X sessions defined in xsession files written for traditional display managers.

Is this correct, and intended? Can this be clarified in the readme?

Just trying to understand what exactly regreet intends to support, absolutely do not fault you for not fully implementing this de-facto "standard". Having spent the better part of three hours trying to figure out why my X sessions aren't starting and going down the rabbit hole of Xsession scripts again, the entire thing seems fragile. No wonder display managers have always been a pain to configure.