A2A Protocol v1.0

Runtype A2A Surfaces now speak the A2A Protocol v1.0 wire format. Agent Cards advertise v1.0 interfaces and security schemes, JSON-RPC methods use the canonical SendMessage, SendStreamingMessage, GetTask, ListTasks, CancelTask, and SubscribeToTask names, and streaming responses carry typed statusUpdate / artifactUpdate envelopes.

Outbound A2A federation remains compatible with both v0.3 and v1.0 external agents: Runtype parses either Agent Card shape, negotiates the best interface, and emits the request envelope that external agent expects.