Edge
Edge is the name given to the current development tree of Alpine Linux. It consists of a APK repository called "edge" and contains the latest build of all available Alpine Linux packages. Those packages are updated on a regular basis.
Warning: It is possible that bugs in Edge could cause data loss or could break your system.
End users should not use Edge as their main day-to-day workstation or as productive system. Because Edge is a development branch, many changes are not heavily tested (or tested at all) and packages in Edge can and sometimes do break without warning.
However, testing Edge is a very valuable activity which helps the Alpine Linux development to ensure that the quality of the stable releases is high. Testing Edge is a great way to contribute to the Alpine Linux development.