Patterns · Vol. 09

Pattern

A2A — Agent-to-Agent Protocol

Provide a JSON-over-HTTP protocol designed specifically for agent-to-agent communication, with first-class agent discovery (via Agent Cards), capability advertisement, task delegation with streaming, and a well-defined task lifecycle.

Classification — Purpose-built agent-to-agent communication protocol.

Full entry

The complete treatment — problem, how it works, when to use it, sources, and examples — lives in the volume below.

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