feat: add MapUtil.java

agents-flex-core/src/main/java/com/agentsflex/llm/client/BaseLlmClientListener.java

@@ -41,7 +41,6 @@ public class BaseLlmClientListener implements LlmClientListener {
     private final StringBuilder fullMessage = new StringBuilder();
     private AiMessage lastAiMessage;
     private boolean isFunctionCalling = false;
-
     private final ChatContext context;
 
     public BaseLlmClientListener(Llm llm, LlmClient client, MessageListener messageListener, Prompt prompt

agents-flex-core/src/main/java/com/agentsflex/util/MapUtil.java

@@ -0,0 +1,35 @@
+package com.agentsflex.util;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class MapUtil {
+
+    public static Map<String, Object> ofSingleKey(String key, Object value) {
+        Map<String, Object> map = new HashMap<>();
+        map.put(key, value);
+        return map;
+    }
+
+    public static MapBuilder of() {
+        return new MapBuilder();
+    }
+
+    public static MapBuilder of(String key, Object value) {
+        return new MapBuilder().put(key, value);
+    }
+
+    public static class MapBuilder {
+        private Map<String, Object> map = new HashMap<>();
+
+        public MapBuilder put(String key, Object value) {
+            map.put(key, value);
+            return this;
+        }
+
+        public Map<String, Object> build() {
+            return map;
+        }
+    }
+
+}