It's not totally finished yet, but parts of it are finished and will start being used by real apps in the next week or two. The reason it has taken a while is

It's not totally finished yet, but parts of it are finished and will start being used by real apps in the next week or two. The reason it has taken a while is not because it was hard, but rather because we've been repeatedly pulled away by other, more-pressing concerns, e.g. basic usability issues or features like the activity/notifications API (which turns out very important for people trying to do real work on Sandstorm). The most in-depth documentation is the .capnp files in the source tree. We will be writing better documentation as the features stabilize (soon).