What does it mean to be a Drupal core co-maintainer?
As a co-maintainer, my job is to perform final review of proposed changes to Drupal core from over 1,600 contributors around the world. I do things like check patches over for utilization of development best practices, ensure they have sufficient automated tests and documentation and that coding standards are followed, and look out for things like performance and UX (uesr experience) regressions. I also tend to wear the “cat herder” uniform in this role; that is, find people who are working on similar things and encourage them to work together, help get contributors un-stuck by committing patches that unblock their work, helping to mediate conflicts, and so on.