"Our goal with the Sailfish OS is to develop an open source operating system in co-operation with the community [...]. We are currently in the process of putting in place the processes and licensing structures that will enable you, the community, to take part in developing Sailfish." SailfishOS.org
Could you please provide more details and clarify your open-source policy? The information quoted above is at least 6 months old and meanwhile there exists quite some confusion in regards to the status and scope to which SailfishOS is or will be open-source.