We welcome contributions to LensKit.
If you have a question about how to use LensKit, consider asking it on the mailing list or Gitter chat room.
If you have found a bug in LensKit, or would like to request a feature, please file an issue on the GitHub issue tracker.
If you would like to contribute to LensKit, please submit a pull request.
By submitting a pull request via GitHub, you warrant that you either own the code or have appropriate authority to submit it, and agree license your changes under LensKit's copyright license (LGPLv2.1+ for the main code, 3-clause BSD for the build scripts).