ERC-8160 Introduces Global Agent Registry Mapping Addresses Everywhere

ERC-8160 Primary Agent Registry introduces a singleton contract mapping each Ethereum address to exactly one agent identity (registry contract + token ID). It builds on existing work like ERC-8004 and ERC-8122, providing a single source of truth for resolving addresses to agents. nxt3d opened a draft proposal on GitHub, focusing on wallets, dapps, and indexers not duplicating lookup mechanisms.