These badges redirect to the documentation pages for the latest development snapshot and latest stable release respectively.
These docs cover everything you need to build and integrate software stacks using BuildStream.
They begin with a basic introduction to BuildStream, background information on basic concepts, and a guide to the BuildStream command line interface. Later sections provide detailed information on BuildStream internals.
If you don't plan on hacking on BuildStream, you most likely want to use the stable versions. These versions are thoroughly tested and are more suited for our end users, while the master and development snapshots are aimed at developers and BuildStream hackers. The development versions might be more prone to bugs or things that have been fixed in subsequent releases.