contributing

CONTRIBUTING.md

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+# Contributing
+
+BLAKE3 is 
+
+* [@oconnor63 ](https://github.com/daeMOn63) (Jack O'Connor)
+* [@sneves](https://github.com/sneves) (Samuel Neves)
+* [@veorq](https://github.com/veorq) (Jean-Philippe Aumasson)
+* [@zookozcash](https://github.com/zookocash) (Zooko)
+
+We welcome and encourage third-party contributions to BLAKE3, be it reports of issues encountered while using the software, suggestions of new features, or proposals of patches.
+
+## Bug reports
+
+Bugs and other problems should be reported on [GitHub Issues](https://github.com/BLAKE3/BLAKE3/issues).
+
+If you report a bug, please:
+
+* Check that it's not already reported in the [GitHub Issues](https://github.com/BLAKE3/BLAKE3/issues).
+* Provide information to help us diagnose and ideally reproduce the bug.
+
+## Patches
+
+We encourage you to fix a bug via a [GitHub Pull request](https://github.com/BLAKE3/BLAKE3/pulls), preferably after creating a related issue and referring it in the PR.
+
+If you contribute code and submit a patch, please note the following:
+
+* We use Rust's stable branch for developing BLAKE3.
+* Pull requests should target the `master` branch.
+* Try to follow the established Rust [style guidelines](https://doc.rust-lang.org/1.0.0/style/)
+
+Also please make sure to create new unit tests covering your code additions. You can execute the tests by running:
+
+```bash
+cargo test
+```
+
+All third-party contributions will be recognized in the list of contributors.
+