• Create Hubble proxy command (hubble-proxy: add initial skeleton #10545)
• Connect to embedded Hubble (ie Hubble API on Cilium agent) that runs on the same node via unix domain socket to perform initial Hubble peers discovery (this requires work in embedded Hubble as this information has to be retrieved from Cilium's IP cache) (hubble: implement peer service, enable it locally #10969)
• Open a connection to all peers and fan-out (this will be optimized at a later stage) (hubble-relay: add initial multi-node support #11171)
• Proxy embedded hubble API (hubble-proxy: implement 'serve' command #10653)
• Monitor for peers joining/leaving the cluster (add peer gRPC service hubble#212, hubble: implement peer service, enable it locally #10969)
• Re-order flows (hubble-relay: implement flows re-ordering #11223, hubble-relay: implement flows reordering #11397)
• Implement mutual TLS (hubble-relay: implement mutual TLS to connect to hubble peers #11224)

Note: multi-node requires Cilium 1.8+ with Hubble embedded.