Refactor example class: rename to CopilotSDK and enhance message handling with usage metrics

Author: brunoborges

README.md

@@ -49,23 +49,34 @@ import com.github.copilot.sdk.events.*;
 import com.github.copilot.sdk.json.*;
 import java.util.concurrent.CompletableFuture;
 
-public class Example {
+public class CopilotSDK {
     public static void main(String[] args) throws Exception {
+        // Create and start client
         try (var client = new CopilotClient()) {
             client.start().get();
-            
+
+            // Create a session
             var session = client.createSession(
-                new SessionConfig().setModel("claude-sonnet-4.5")
-            ).get();
+                new SessionConfig().setModel("claude-sonnet-4.5")).get();
 
-            var done = new CompletableFuture<Void>();
+            // Handle assistant message events
             session.on(AssistantMessageEvent.class, msg -> {
                 System.out.println(msg.getData().getContent());
             });
-            session.on(SessionIdleEvent.class, idle -> done.complete(null));
 
-            session.send(new MessageOptions().setPrompt("What is 2+2?")).get();
-            done.get();
+            // Handle session usage info events
+            session.on(SessionUsageInfoEvent.class, usage -> {
+                var data = usage.getData();
+                System.out.println("\n--- Usage Metrics ---");
+                System.out.println("Current tokens: " + (int) data.getCurrentTokens());
+                System.out.println("Token limit: " + (int) data.getTokenLimit());
+                System.out.println("Messages count: " + (int) data.getMessagesLength());
+            });
+
+            // Send a message
+            var completable = session.sendAndWait(new MessageOptions().setPrompt("What is 2+2?"));
+            // and wait for completion
+            completable.get();
         }
     }
 }