MCP, A2A, and Pilot Protocol Are Not Competing. Your Agent Stack Probably Needs All Three.

Every few weeks someone publishes a comparison of MCP, A2A, and Pilot Protocol as if you have to pick one. I have seen the charts. One column per protocol, rows for features, checkmarks and crosses. They are almost always wrong, not because the facts are wrong but because the framing is wrong. These three protocols do not compete with each other. They sit at different layers of the same stack. Choosing between them is like choosing between TCP and HTTP. The question does not make sense because o