Google's Agent2Agent protocol, usually shortened to A2A, had a strange first year. When Google announced A2A in April 2025, the pitch was clear: AI agents built by different vendors, frameworks, and teams needed a standard way to communicate. The protocol promised agent discovery, task delegation, message exchange, streaming updates, and artifact sharing. The reaction, however, was considerably less clean than the announcement. Some developers saw A2A as the missing agent-to-agent layer fo...