chore: Adds package-info file and sets package as @NullMarked (#336).

Update tck/src/main/java/io/a2a/tck/server/AgentExecutorProducer.java

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Update tck/src/main/java/io/a2a/tck/server/AgentCardProducer.java

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

feat: Add some additional methods to TaskUpdater (#339)

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test: Disable flaky KafkaReplicationIntegrationTest (#346)

Removes unused imports

removes unused import

Author: ethanthopkins

extras/queue-manager-replicated/tests/src/test/java/io/a2a/extras/queuemanager/replicated/tests/KafkaReplicationIntegrationTest.java

@@ -41,13 +41,15 @@
 import org.eclipse.microprofile.reactive.messaging.Channel;
 import org.eclipse.microprofile.reactive.messaging.Emitter;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 /**
  * Integration test for Kafka replication functionality.
  * Tests the full A2A message flow with Kafka replication verification.
  */
 @QuarkusTest
+@Disabled
 public class KafkaReplicationIntegrationTest {
 
     @Inject

server-common/src/main/java/io/a2a/server/tasks/TaskUpdater.java

@@ -58,6 +58,14 @@ private void updateStatus(TaskState state, Message message, boolean isFinal) {
         }
     }
 
+    public String getContextId() {
+        return this.contextId;
+    }
+
+    public void addArtifact(List<Part<?>> parts) {
+        addArtifact(parts, null, null, null);
+    }
+
     public void addArtifact(List<Part<?>> parts, String artifactId, String name, Map<String, Object> metadata) {
         addArtifact(parts, artifactId, name, metadata, null, null);
     }

tck/src/main/java/io/a2a/tck/server/AgentExecutorProducer.java

@@ -11,7 +11,6 @@
 import io.a2a.spec.JSONRPCError;
 import io.a2a.spec.Task;
 import io.a2a.spec.TaskNotCancelableError;
-import io.a2a.spec.TaskNotFoundError;
 import io.a2a.spec.TaskState;
 import io.a2a.spec.TaskStatus;
 import io.a2a.spec.TaskStatusUpdateEvent;

tck/src/main/java/io/a2a/tck/server/package-info.java

@@ -0,0 +1,10 @@
+@NullMarked
+package io.a2a.tck.server;
+
+import org.jspecify.annotations.NullMarked;
+
+//The following had @Nullable annotation applied from JSpecify
+//AgentCardProducer.java getEnvOrDefault method, 
+//AgentExecutorProducer.java execute method
+//
+