Agent interop — the protocols an agent speaks outside its own process

agent-orchestrator builds the loop. agent-evals proves it behaves. This skill covers everything the loop reaches that is not in its process: a tool server, a peer agent, a registry, and the gateway between them.

Rule zero — a protocol claim without a date is a guess

Every one of these specifications moved in the last twelve months, and each moved in a way that silently breaks code written against the previous revision. Concretely, and each one measured against the live specification rather than recalled: