PostgreSQL has a very unique way to review the code submitted by developers. Most open source software uses Github pull requests to accommodate users code. PostgreSQL has a Github page but doesnt  manage pull requests using Github. Many years ago, PostgreSQL introduced CommitFest to manage its patches, where postgres opens for a three to four [&]

https://www.percona.com/blog/2019/04/17/postgresql-commitfest-2019-03-ends/