I thought msgpack was gonna be 'the thing'? It has libraries already
Introducing #reNostr: the effort to built faster, more secure & scalable #nostr upgrade.
reNostr for Nostr is like SegWit for #Bitcoin
Join the work, which will be managed by Cyphernet - Swiss non-profit we are establishing with partners.
reNostr will provide a reliable binary protocol - new transport for #RGB client-side-validated offchain data - as well as medium for new contracts distribution and some of DEX operations. It will be also used in other wallet-related workflows by MyCitadel wallet.
Join the effort: https://github.com/renostr/nrps 
Discussion
It does not provide a deterministic encoding though