Indeed, I think for ManyBabies we, particularly , have actively promoted openness at all stages, to me it was very important to avoid this in-group feel (which I could write a whole separate thread about). Very early on there was eg this blog post
P.S. I got curious and looking at publication dates, the ManyBabies idea precedes the paper: Which is in line with my memory, yay. It might have been a nudge for journals to adopt RRs, I wouldn't deny that.
This project began over lunch at SRCD 20215. With urging from , these conversations became a blogpost () and an endless email thread as a growing group discussed what it would mean to collaborate across labs on a single replication project.