Because we haven't implemented the white paper yet. But we are coding that now and the repo will be opened once we're ready. Meanwhile we did publish the source for the token-weighted voting implementation, see https://blog.colony.io/token-weighted-voting-implementation-... and have opened more than just code, e.g. our employee equity plan https://blog.colony.io/on-creating-a-better-employee-equity-..., the legal reasoning behind a token sale etc.