A trust discovery architecture for the Internet of Agents, because MCP and A2A never solved registration or identity

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Current agent protocols handle tool invocation and inter-agent messaging but leave scalable registration, trustworthy identification and capability-oriented discovery open. The proposal is a three-layer design of Agent Root for registry governance, Agent Registry for registration and metadata publication, and Agent Resolver for distributed capability discovery, with a composite identity that binds an agent's native identifier to a trusted registry suffix so the identity is globally resolvable. Dual certificates and multi-level authentication back the identity claims. Single-source proposal with no deployment data yet, so treat it as a design direction rather than an available option.