Solid is a group of people focused on providing to KDE Platform and KDE Plasma Desktop hardware and system integration support. To do that the Solid Team work on different projects some of them focused on User Experience and others in providing user-friendly tools for developers.
All our projects operate community-wise in the same way, using the same process for patch review, communication etc. You can read more about it here
If you're interested get your hands dirty with any of the Solid projects you may want to take a look at our Junior Jobs Page
In all Solid Meetings we try to keep a minute of what we do, or what we discuss.