The full control plane is not open source, so if you use tenants or many of the not-in-postgres features you will need to implement the control plane. It's not too much work to do so - there's already a few open source projects starting to do so - but just be aware of that.
We have a toy control plane implementation in the neon repo aliased to `cargo neon`, but also available as `neon_local`. I'm honestly not sure if open-sourcing the production control plane is in our future.
