# Contributing

Want to contribute?  Great!  First, read this page (including the small print
at the end).

## Before you contribute

Before we can use your code, you must sign the [Google Individual Contributor
License Agreement](https://cla.developers.google.com/about/google-individual)
(CLA), which you can do online.

The CLA is necessary mainly because you own the copyright to your changes, even
after your contribution becomes part of our codebase, so we need your
permission to use and distribute your code.  We also need to be sure of various
other things: for instance that you'll tell us if you know that your code
infringes on other people's patents.  You don't have to sign the CLA until
after you've submitted your code for review and a member has approved it, but
you must do it before we can put your code into our codebase.

Before you start working on a larger contribution, you should get in touch with
us first through the issue tracker with your idea so that we can help out and
possibly guide you.  Coordinating up front makes it much easier to avoid
frustration later on.

## Code reviews

All submissions, including submissions by project members, require review.
We use Github pull requests for this purpose.

## The small print

Contributions made by corporations are covered by a different agreement than
the one above, the [Software Grant and Corporate Contributor License
Agreement](https://cla.developers.google.com/about/google-corporate).
