A2A

The agent-framework market consolidated into four orchestration patterns, but those patterns leak into each other by the vendors' own docs. They are primitives on a spectrum from deterministic to autonomous, and the decision is which primitive you need, not which framework.

AGNTCY is the Internet of Agents project, and it just archived its own Agent Connect Protocol. Reading that archive shows the layer dividing into describe and invoke.

AutoGen is in maintenance mode and its fork AG2 carries on; every model provider now gives away a thin agent SDK. The framework layer is fragmenting on purpose, and the real competition has moved to the orchestration loop, the memory layer, and the protocols.

A2A's move into the Agentic AI Foundation is a hosting change, not a control transfer, and it still leaves enterprise authorization, key-to-org binding, and conformance depth on the buyer.