Just to set expectations here - I don’t think that we are close. We started by designing and prototyping the most intricate / difficult-to-get-right part of the protocol - that’s the part which is described and implemented in the GitHub repository - but there’s a lot of work remaining to actually build integrations into the Namada state machine, libraries for Zcash wallets, and end-to-end test examples. This protocol also only works for Sapling, we haven’t investigated Orchard in detail yet.
We want to get feedback from the Zcash community on this part of the protocol - since it relates specifically to questions previously asked by Zcash community members relating to privacy, integrity, risks, etc. - before moving forward with other implementation work which depends on some of these design decisions, since otherwise we might have to backtrack if Zcashers have concerns which we didn’t consider early enough.
Regarding your question - further communications regarding the Namada genesis block proposal will be forthcoming soon.