Contributing
Full source code for the input system is available on GitHub. This is also where most of our development happens.
NOTE: This includes the full source code for the managed/C# part of the system. At this point, the native, platform-specific C++ backends are still closed-source and require a source code license.
Reporting Bugs
Input System bugs should be reported through using same mechanism as for any other Unity bugs. Make sure to submit a repro project, and to mention that the bug is specific to the Input System package in the description, so it can get forwarded to the correct respondents at Unity.
Discussion
To ask questions or discuss the input system, we have a dedicated section on Unity's forum. This is also the best place to post feature requests.