diff --git a/agents-flex-core/src/main/java/com/agentsflex/core/llm/rerank/RerankException.java b/agents-flex-core/src/main/java/com/agentsflex/core/llm/rerank/RerankException.java
new file mode 100644
index 0000000..2ee8308
--- /dev/null
+++ b/agents-flex-core/src/main/java/com/agentsflex/core/llm/rerank/RerankException.java
@@ -0,0 +1,92 @@
+/*
+ *  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.llm.rerank;
+
+public class RerankException extends RuntimeException {
+
+    /**
+     * Constructs a new runtime exception with {@code null} as its
+     * detail message.  The cause is not initialized, and may subsequently be
+     * initialized by a call to {@link #initCause}.
+     */
+    public RerankException() {
+    }
+
+    /**
+     * Constructs a new runtime exception with the specified detail message.
+     * The cause is not initialized, and may subsequently be initialized by a
+     * call to {@link #initCause}.
+     *
+     * @param message the detail message. The detail message is saved for
+     *                later retrieval by the {@link #getMessage()} method.
+     */
+    public RerankException(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructs a new runtime exception with the specified detail message and
+     * cause.  <p>Note that the detail message associated with
+     * {@code cause} is <i>not</i> automatically incorporated in
+     * this runtime exception's detail message.
+     *
+     * @param message the detail message (which is saved for later retrieval
+     *                by the {@link #getMessage()} method).
+     * @param cause   the cause (which is saved for later retrieval by the
+     *                {@link #getCause()} method).  (A <tt>null</tt> value is
+     *                permitted, and indicates that the cause is nonexistent or
+     *                unknown.)
+     * @since 1.4
+     */
+    public RerankException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    /**
+     * Constructs a new runtime exception with the specified cause and a
+     * detail message of <tt>(cause==null ? null : cause.toString())</tt>
+     * (which typically contains the class and detail message of
+     * <tt>cause</tt>).  This constructor is useful for runtime exceptions
+     * that are little more than wrappers for other throwables.
+     *
+     * @param cause the cause (which is saved for later retrieval by the
+     *              {@link #getCause()} method).  (A <tt>null</tt> value is
+     *              permitted, and indicates that the cause is nonexistent or
+     *              unknown.)
+     * @since 1.4
+     */
+    public RerankException(Throwable cause) {
+        super(cause);
+    }
+
+    /**
+     * Constructs a new runtime exception with the specified detail
+     * message, cause, suppression enabled or disabled, and writable
+     * stack trace enabled or disabled.
+     *
+     * @param message            the detail message.
+     * @param cause              the cause.  (A {@code null} value is permitted,
+     *                           and indicates that the cause is nonexistent or unknown.)
+     * @param enableSuppression  whether or not suppression is enabled
+     *                           or disabled
+     * @param writableStackTrace whether or not the stack trace should
+     *                           be writable
+     * @since 1.7
+     */
+    public RerankException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+}