CarK 
#TIL 🤓 There is a concept called "Architectural Decision Record" #ADR, see https://adr.github.io/.
ADRs are used to document architecture decisions in software project to facilitate discussions in the (far) future.
I think with the same motivation also non-software-related important decisions in teams and other collaborative groups should be systematically documented.
Thanks to @blinry and @zormit who talked about this topic within their @teamtype talk at recent @clt_news
Record of the talk, see
Szymon Nowicki