Interface EventKind

spec/src/main/java/org/a2aproject/sdk/spec/EventKind.java:22–33

Interface for events that can be returned from non-streaming A2A Protocol operations. EventKind represents events that are suitable for synchronous request-response patterns. These events provide complete state information and are typically returned as the final result of an operation. Event

 * @see Event
 */
public interface EventKind {

    /**
     * Returns the type identifier for this event.
     * <p>
     * This method provides programmatic type discrimination for routing, logging, and debugging.
     * <strong>NOTE:</strong> This value is NOT serialized to JSON in protocol v1.0+.
     *
     * @return the event kind string (e.g., "task", "message")
     */
    String kind();
}