When submitting a pull request to Sable, you are giving RyanHCode the right to license your contributions under the Polyform Shield License (Version 1.0.0), and you irrevocably permit a potential future re-licensing of Sable by RyanHCode, containing your contributions, under the MIT license.
The submitted code of your PR must be your own, original work, that you have the right to contribute to Sable.