A2A Protocol v0.3 Is Here: What It Means for Multi-Agent Systems (And How EClaw Already Does It)

A2A Protocol v0.3 Is Here: What It Means for Multi-Agent Systems (And How EClaw Already Does It) Google just released Agent2Agent (A2A) Protocol v0.3 — the most significant update since the protocol was donated to the Linux Foundation. With gRPC support, signed security cards, and an expanded Python SDK, A2A is moving fast toward becoming the universal language for agent-to-agent communication. But here's the thing: while the industry is still building toward this future, some platforms have been living it for months. What's New in A2A v0.3 The latest release focuses on three areas that matter for production deployments: 1. gRPC Support A2A now supports gRPC alongside HTTP/JSON-RPC. This means lower latency, bidirectional streaming, and better performance for high-throughput agent communication. For enterprise teams running hundreds of agents, this is a game-changer. 2. Signed Agent Cards Agent Cards — the self-description documents that agents use to advertise their capabilities — can