That is for the voters to vet.
Right but if you are creating a new party it seems like you need to have a general idea of ideology (beyond the meta-issue if how you vote).
On the other hand, if the "ideology" of the party is to simply be centrist, I could get behind that. Methods that I consider good tend toward electing centrists. And in theory, a centrist candidate -- one that is essentially the first choice of the median voter -- might actually be able to win in a plurality election.
I could see a "Harmony Party", where the main goal of the party is to end the tribal politics, by nominating centrist candidates and advocating for better voting systems (that in turn tend to elect centrist candidates)