fix: enhance error handling in permission request processing

Author: brunoborges

jbang-example.java

@@ -12,15 +12,21 @@ public static void main(String[] args) throws Exception {
             client.start().get();
 
             // Create a session
-            var session = client.createSession(
-                    new SessionConfig().setModel("claude-sonnet-4.5")).get();
+            var sessionConfig = new SessionConfig().setModel("claude-sonnet-4.5");
+            var session = client.createSession(sessionConfig).get();
 
             // Wait for response using session.idle event
             var done = new CompletableFuture<Void>();
 
             session.on(evt -> {
                 if (evt instanceof AssistantMessageEvent msg) {
                     System.out.println(msg.getData().getContent());
+                } else if (evt instanceof SessionUsageInfoEvent 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());
                 } else if (evt instanceof SessionIdleEvent) {
                     done.complete(null);
                 }

src/main/java/com/github/copilot/sdk/CopilotSession.java

@@ -21,7 +21,6 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.github.copilot.sdk.events.AbstractSessionEvent;
@@ -386,9 +385,14 @@ CompletableFuture<PermissionRequestResult> handlePermissionRequest(JsonNode perm
             PermissionRequest request = MAPPER.treeToValue(permissionRequestData, PermissionRequest.class);
             PermissionInvocation invocation = new PermissionInvocation();
             invocation.setSessionId(sessionId);
-            return handler.handle(request, invocation);
-        } catch (JsonProcessingException e) {
-            LOG.log(Level.SEVERE, "Failed to parse permission request", e);
+            return handler.handle(request, invocation).exceptionally(ex -> {
+                LOG.log(Level.SEVERE, "Permission handler threw an exception", ex);
+                PermissionRequestResult result = new PermissionRequestResult();
+                result.setKind("denied-no-approval-rule-and-could-not-request-from-user");
+                return result;
+            });
+        } catch (Exception e) {
+            LOG.log(Level.SEVERE, "Failed to process permission request", e);
             PermissionRequestResult result = new PermissionRequestResult();
             result.setKind("denied-no-approval-rule-and-could-not-request-from-user");
             return CompletableFuture.completedFuture(result);