Generally, this project follows a pretty standard GitHub workflow: If you make a change, submit a pull request, and we'll review it. If we ask you to change something, please do so. If you submit a PR, it is your responsibility to contribute to it until it gets closed. Also, please, please PLEASE search for duplicate pull requests/issues before you submit a new one! It makes everyone's life, including yours, a whole lot easier.
For more detailed instructions on how to get started, please see this wiki page.
We do believe in styleguides around here. We suggest that you familiarize yourself with them before contributing. Code that does not follow the styleguide will not be merged.
We use the Google styleguides for everything, pretty much. You can find links below.
The code on the MCU is written in C, which Google (to my knowledge) does not have a styleguide for. Therefore, we follow the C++ styleguide mostly, and just ignore the parts pertaining to C++-only features. Furthermore, we also write our C function names lowercase_with_underscores, as this matches better with existing C naming paradigms.
Also, for JS code, we are not (yet) requiring you to use the Closure compiler, although this will be changing in the future.