We'd love to accept your patches and contributions to this project. There are just a few small guidelines you need to follow.
Contributions to this project must be accompanied by a Contributor License Agreement (CLA). You (or your employer) retain the copyright to your contribution; this simply gives us permission to use and redistribute your contributions as part of the project. Head over to https://cla.developers.google.com/ to see your current agreements on file or to sign a new one.
You generally only need to submit a CLA once, so if you've already submitted one (even if it was for a different project), you probably don't need to do it again.
We trust contributors to use their best judgement as to whether a commit should be reviewed. We hope to establish a culture in which contributors voluntarily wait for approval of substantial changes (e.g. non-tiny, non-obvious, or impactful to design or features).
We use pull requests as a mechanism for requesting review and approving commits.
For changes expected to involve substantial effort, contributors are encouraged to start discussion using an issue before investing substantial coding effort.
Please auto format before committing using yapf with the .style.yapf at the root of this project. (yapf automatically looks for this config file in parent directories.) This provides a definite (though arbitrary) convention to minimize the impact of whitespace-only differences on merge effort and to avoid needing to debate formatting in code reviews.