You build the contribution list from Git:
See: https://lab.nexedi.com/nexedi/slapos.core/graphs/master and https://lab.nexedi.com/nexedi/slapos.core/graphs/master
About history, the "Design documents" at http://community.slapos.org/wiki gives you the idea the principles and ideas that SlapOS was based on. Isn't it enough?
Regards, Rafael Monnerat