Two personal AIs tried to schedule coffee: agent interop needs a protocol

signulll · x · 2026-09-23

The author realized mid-coordination that they and their contact were on different personal-agent platforms, raising the interop question: what becomes the common protocol? Options: give every agent an email/chat address for default interoperability, or accept agent-era walled gardens like iMessage with email as an SMS-style fallback. Multiplayer negotiation between personal and business agents — and the privacy stakes — is one of the most fascinating problem spaces right now.

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