@User: We (at efabless) have been discussing this recently. Most likely it will be (a) a repository that you fork; however, we (efabless and Google) will be running experiments in the harness ourselves. That means that we will guarantee that the harness design that you fork and use will be valid and operate as you simulate it and extract it, but we reserve the right to swap it out for our own variant. This also helps to discourage people from making the harness do what they want by modifying the harness itself. The idea of a non-mutable harness design makes the design management easier for us to handle on our end. Of course, the harness design is also evolving through the first few shuttle runs, so if the harness design doesn't work for you in some way, we're here to help you figure out what to do about it.