The best way to contribute is to file an issue with any bugs you find or any features you think belong in keyd. Small issues pertaining to things like compilation on different platforms can be submitted as PRs but please avoid sending in patches which change core functionality without filing an issue first. The key logic can be deceptively simple and contains a few subtleties that need to be managed properly. Additionally, I reserve the right to reject any features which I do not think belong in keyd.