# How to Contribute
We'd love to accept your patches and contributions to this project. There are
just a few small guidelines you need to follow.
## Contributor License Agreement
Contributions to this project must be accompanied by a Contributor License
Agreement. 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.
## Code reviews
All submissions, including submissions by project members, require review. We
use GitHub pull requests for this purpose. Consult
[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
information on using pull requests.
## Licensing
Although this project is just licensed under the Apache License v2.0, the CLA is
sufficient to allow Google the option to relicense in the future under a dual
Apache2/MIT license. e.g. if this project were merged into another project that
was dual licensed.
## Questions
Please feel free to email David Lattimore (email address in Cargo.toml) if you'd
like you contribute but aren't sure how, or if you have some ideas and want
guidance, etc.