Via the Katmandu Post:
During the meeting of the committee held in Singhadurbar on Tuesday morning, the Nepali Congress and CPN-UML submitted a joint proposal and the UCPN (Maoist) and Tarai Madhes Loktantrik Party tabled their separate proposals. NC and UML stood for improved parliamentary system comprising ceremonial president and executive prime minister elected from the House and Mixed Member Proportional Representation electoral system. They also proposed a one-year prohibition on no-confidence motion against the government and demanded alternative prime ministerial candidate prior to moving a no-trust motion. The Maoists proposed a directly elected executive president with consensual government and multi-member proportional direct electoral system while the TMLP floated the idea of executive president elected from parliament and mixed electoral system.
I am going to assume that the “multi-member proportional direct electoral system” means a standard districted PR (as opposed to MMP), but the description is somewhat less than straightforward. I would have to use my imagination a bit further to figure out what a “directly elected executive president with consensual government” is. Presumably some form of semi-presidentialism, but that is not a form of government that is necessarily conducive to consensus government (depending on various other important details).
The article includes greater detail on the voting breakdown.
(Once again, thanks to Rob R. for this tip.)