Thought this might be interesting to this audience...
We're open sourcing Baton today:
https://github.com/ConductorOne/baton#readme
Its.... not really directly related to Zanzibar directly? But its part of the... kind of "life cycle" management of Permissions, especially across SaaS/IaaS tools. Maybe one way to think about it, is an Export Format for a Permissions Engine like Zanzibar/spiceDB.