Code Recommenders follows a pretty simple release approach. There are three release channels and on labs aggregator:

• Stable: The Stable channel is updated with features and fixes once they have been thoroughly tested in the Dev channel. If you want rock solid Code Recommenders but don't need the latest features, the Stable channel is for you. Currently, there are no stable builds yet.
• Dev: This developer preview channel is where ideas get tested (and sometimes fail). The Dev channel can be very unstable at times, and new features usually require some manual configuration to be enabled. Still, simply using Dev channel releases is an easy (practically zero-effort) way for anyone to help improve Code Recommenders.
• Head: This build is for people who want to help test Code Recommenders and contribute to its development. Whereas Dev and Stable channels are released manually after some manual testing phase, head builds are provided immediately by the build server if the build passes the automated test suite. Consequently, every new feature and/or fix is immediately available in head but may at times be unusable. You shouldn't set this channels as your default release channel if your are not an enthusiastic power user or committer :-)
• Labs: Recommenders is about trying new ideas. These new ideas are accessible in this labs update site. Please note that plug-ins made available here are not hosted at Eclipse.org and are not (yet) part of the Recommenders project. It's merely a composite update site that aggregates external, mostly student and early prototype projects. Also note that these plug-ins are not necessarily published under EPL. Thes plug-ins are thought for early adopters, committers, researchers, and contributors!

Channels Overview