Bonjour,
SustainOSS suffered from a lack of CoC and recurring toxic behavior, which is a common combination. They addressed it by freezing the public spaces for a few weeks, which is an idea that is new to me, but interesting.
I’m not sure how it could be applied in a context of a horizontal and transparent community though. The discussions during the freeze period were held in private spaces and not disclosed publicly. The changes to adopt a CoC were not debated in public. I’m not sure this is a process I would like to participate in.