The New Relic Ruby agent is now fully open source and available on GitHub at newrelic-ruby-agent. As of version 6.12 (released July 16, 2020), it's licensed under the Apache License, Version 2.0. For older agent versions, check the LICENSE file included with the source code. The source code for Ruby agent versions 2.1.0 are available on GitHub using tags.
The head of main will have New Relic's latest release. However, we reserve the ability to push an edge to the main. The dev branch includes unreleased work. If you download a release from GitHub, use the appropriate tag. We usually release preview versions via GitHub before publishing a new version to RubyGems.
Fork away and feel free to send us pull requests, create issues, and start discussions right in the GitHub repo. We love working with the community!