diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/demo/SSEDemoController.java b/prompto-lab-app/src/main/java/io/github/timemachinelab/controller/SSEDemoController.java
similarity index 99%
rename from prompto-lab-app/src/main/java/io/github/timemachinelab/demo/SSEDemoController.java
rename to prompto-lab-app/src/main/java/io/github/timemachinelab/controller/SSEDemoController.java
index df237fd..0fa6ad3 100644
--- a/prompto-lab-app/src/main/java/io/github/timemachinelab/demo/SSEDemoController.java
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/controller/SSEDemoController.java
@@ -1,4 +1,4 @@
-package io.github.timemachinelab.demo;
+package io.github.timemachinelab.controller;
 
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.MediaType;
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/controller/UserInteractionController.java b/prompto-lab-app/src/main/java/io/github/timemachinelab/controller/UserInteractionController.java
new file mode 100644
index 0000000..a3b2955
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/controller/UserInteractionController.java
@@ -0,0 +1,56 @@
+package io.github.timemachinelab.controller;
+
+import io.github.timemachinelab.entity.req.RetryRequest;
+import io.github.timemachinelab.entity.resp.ApiResult;
+import io.github.timemachinelab.entity.resp.RetryResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+
+/**
+ * 用户交互控制器
+ * 提供用户交互相关的API接口
+ * 
+ * @author suifeng
+ * @date 2025/1/20
+ */
+@Slf4j
+@RestController
+@RequestMapping("/api/user-interaction")
+@Validated
+public class UserInteractionController {
+
+    /**
+     * 重试接口
+     * 
+     * @param request 重试请求参数
+     * @return 重试结果
+     */
+    @PostMapping("/retry")
+    public ResponseEntity<ApiResult<RetryResponse>> retry(@Valid @RequestBody RetryRequest request) {
+        try {
+            log.info("收到重试请求 - nodeId: {}, sessionId: {}, whyretry: {}", 
+                    request.getNodeId(), request.getSessionId(), request.getWhyretry());
+            
+            // 构建响应数据
+            RetryResponse response = RetryResponse.builder()
+                    .nodeId(request.getNodeId())
+                    .sessionId(request.getSessionId())
+                    .whyretry(request.getWhyretry())
+                    .processTime(System.currentTimeMillis())
+                    .build();
+            
+            log.info("重试请求处理成功 - nodeId: {}, sessionId: {}", 
+                    request.getNodeId(), request.getSessionId());
+            
+            return ResponseEntity.ok(ApiResult.success("重试请求处理成功", response));
+            
+        } catch (Exception e) {
+            log.error("重试请求处理失败: {}", e.getMessage(), e);
+            return ResponseEntity.badRequest().body(ApiResult.serverError("重试请求处理失败: " + e.getMessage()));
+        }
+    }
+}
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/dto/.gitkeep b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/dto/.gitkeep
new file mode 100644
index 0000000..aba87a9
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/dto/.gitkeep
@@ -0,0 +1,2 @@
+# DTO包
+此包用于存放数据传输对象(Data Transfer Object)
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/entity/.gitkeep b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/entity/.gitkeep
new file mode 100644
index 0000000..b5d130e
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/entity/.gitkeep
@@ -0,0 +1,2 @@
+# ENTITY包
+此包用于存放实体对象(Entity Object)
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/req/.gitkeep b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/req/.gitkeep
new file mode 100644
index 0000000..afeb242
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/req/.gitkeep
@@ -0,0 +1,2 @@
+# REQ包
+此包用于存放请求对象(Request Object)
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/req/RetryRequest.java b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/req/RetryRequest.java
new file mode 100644
index 0000000..bc802da
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/req/RetryRequest.java
@@ -0,0 +1,41 @@
+package io.github.timemachinelab.entity.req;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.NotNull;
+
+/**
+ * 重试请求参数
+ * 
+ * @author suifeng
+ * @date 2025/1/20
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class RetryRequest {
+    
+    /**
+     * 节点ID
+     */
+    @NotNull(message = "nodeId不能为null")
+    @NotBlank(message = "nodeId不能为空")
+    private String nodeId;
+    
+    /**
+     * 会话ID
+     */
+    @NotNull(message = "sessionId不能为null")
+    @NotBlank(message = "sessionId不能为空")
+    private String sessionId;
+    
+    /**
+     * 重试原因
+     */
+    @NotNull(message = "whyretry不能为null")
+    @NotBlank(message = "whyretry不能为空")
+    private String whyretry;
+}
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/.gitkeep b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/.gitkeep
new file mode 100644
index 0000000..9630020
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/.gitkeep
@@ -0,0 +1,2 @@
+# RESP包
+此包用于存放响应对象(Response Object)
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/ApiResult.java b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/ApiResult.java
new file mode 100644
index 0000000..d5aeae5
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/ApiResult.java
@@ -0,0 +1,92 @@
+package io.github.timemachinelab.entity.resp;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+
+/**
+ * 统一API响应结果类
+ * 
+ * @param <T> 数据类型
+ * @author suifeng
+ * @date 2025/1/20
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class ApiResult<T> {
+    
+    /**
+     * 响应状态码
+     */
+    private Integer code;
+    
+    /**
+     * 响应消息
+     */
+    private String message;
+    
+    /**
+     * 响应数据
+     */
+    private T data;
+    
+    /**
+     * 时间戳
+     */
+    private Long timestamp;
+    
+    /**
+     * 是否成功
+     */
+    private Boolean success;
+    
+    /**
+     * 成功响应
+     */
+    public static <T> ApiResult<T> success(T data) {
+        return new ApiResult<>(200, "操作成功", data, System.currentTimeMillis(), true);
+    }
+    
+    /**
+     * 成功响应（自定义消息）
+     */
+    public static <T> ApiResult<T> success(String message, T data) {
+        return new ApiResult<>(200, message, data, System.currentTimeMillis(), true);
+    }
+    
+    /**
+     * 成功响应（无数据）
+     */
+    public static <T> ApiResult<T> success(String message) {
+        return new ApiResult<>(200, message, null, System.currentTimeMillis(), true);
+    }
+    
+    /**
+     * 失败响应
+     */
+    public static <T> ApiResult<T> error(String message) {
+        return new ApiResult<>(400, message, null, System.currentTimeMillis(), false);
+    }
+    
+    /**
+     * 失败响应（自定义状态码）
+     */
+    public static <T> ApiResult<T> error(Integer code, String message) {
+        return new ApiResult<>(code, message, null, System.currentTimeMillis(), false);
+    }
+    
+    /**
+     * 参数校验失败
+     */
+    public static <T> ApiResult<T> validateError(String message) {
+        return new ApiResult<>(400, message, null, System.currentTimeMillis(), false);
+    }
+    
+    /**
+     * 服务器内部错误
+     */
+    public static <T> ApiResult<T> serverError(String message) {
+        return new ApiResult<>(500, message, null, System.currentTimeMillis(), false);
+    }
+}
\ No newline at end of file
diff --git a/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/RetryResponse.java b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/RetryResponse.java
new file mode 100644
index 0000000..a2b5fbd
--- /dev/null
+++ b/prompto-lab-app/src/main/java/io/github/timemachinelab/entity/resp/RetryResponse.java
@@ -0,0 +1,39 @@
+package io.github.timemachinelab.entity.resp;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+
+/**
+ * 重试响应结果
+ * 
+ * @author suifeng
+ * @date 2025/1/20
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class RetryResponse {
+    
+    /**
+     * 节点ID
+     */
+    private String nodeId;
+    
+    /**
+     * 会话ID
+     */
+    private String sessionId;
+    
+    /**
+     * 重试原因
+     */
+    private String whyretry;
+    
+    /**
+     * 处理时间戳
+     */
+    private Long processTime;
+}
\ No newline at end of file