Ive been prototyping with Iroh for awhile.
I think this tech (modern p2p) represents what agent-to-agent (a2a) should be built on.
Every agent should be reachable to each other without hosting itself as an http server.
related prototypes
https://github.com/eqtylab/agentbeam
https://github.com/eqtylab/real-a2a