diff --git a/agents-flex-core/src/main/java/com/agentsflex/core/chain/node/BaseNode.java b/agents-flex-core/src/main/java/com/agentsflex/core/chain/node/BaseNode.java
new file mode 100644
index 0000000..5e27af1
--- /dev/null
+++ b/agents-flex-core/src/main/java/com/agentsflex/core/chain/node/BaseNode.java
@@ -0,0 +1,66 @@
+/*
+ *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.agentsflex.core.chain.node;
+
+import com.agentsflex.core.chain.ChainNode;
+import com.agentsflex.core.chain.Parameter;
+
+import java.util.Collection;
+import java.util.List;
+
+public abstract class BaseNode extends ChainNode {
+
+    protected List<Parameter> parameters;
+    protected List<Parameter> outputDefs;
+
+    public void setParameters(List<Parameter> parameters) {
+        this.parameters = parameters;
+    }
+
+    public List<Parameter> getParameters() {
+        return parameters;
+    }
+
+    public void addInputParameter(Parameter parameter) {
+        if (parameters == null) {
+            parameters = new java.util.ArrayList<>();
+        }
+        parameters.add(parameter);
+    }
+
+
+    public List<Parameter> getOutputDefs() {
+        return outputDefs;
+    }
+
+    public void setOutputDefs(List<Parameter> outputDefs) {
+        this.outputDefs = outputDefs;
+    }
+
+    public void addOutputDef(Parameter parameter) {
+        if (outputDefs == null) {
+            outputDefs = new java.util.ArrayList<>();
+        }
+        outputDefs.add(parameter);
+    }
+
+    public void addOutputDefs(Collection<Parameter> parameters) {
+        if (outputDefs == null) {
+            outputDefs = new java.util.ArrayList<>();
+        }
+        outputDefs.addAll(parameters);
+    }
+}