diff --git a/extensions/feishu/src/send.reply-fallback.test.ts b/extensions/feishu/src/send.reply-fallback.test.ts
index 75dda353bbe..610ded167fd 100644
--- a/extensions/feishu/src/send.reply-fallback.test.ts
+++ b/extensions/feishu/src/send.reply-fallback.test.ts
@@ -25,6 +25,16 @@ describe("Feishu reply fallback for withdrawn/deleted targets", () => {
   const replyMock = vi.fn();
   const createMock = vi.fn();
 
+  async function expectFallbackResult(
+    send: () => Promise<{ messageId?: string }>,
+    expectedMessageId: string,
+  ) {
+    const result = await send();
+    expect(replyMock).toHaveBeenCalledTimes(1);
+    expect(createMock).toHaveBeenCalledTimes(1);
+    expect(result.messageId).toBe(expectedMessageId);
+  }
+
   beforeEach(() => {
     vi.clearAllMocks();
     resolveFeishuSendTargetMock.mockReturnValue({
@@ -51,16 +61,16 @@ describe("Feishu reply fallback for withdrawn/deleted targets", () => {
       data: { message_id: "om_new" },
     });
 
-    const result = await sendMessageFeishu({
-      cfg: {} as never,
-      to: "user:ou_target",
-      text: "hello",
-      replyToMessageId: "om_parent",
-    });
-
-    expect(replyMock).toHaveBeenCalledTimes(1);
-    expect(createMock).toHaveBeenCalledTimes(1);
-    expect(result.messageId).toBe("om_new");
+    await expectFallbackResult(
+      () =>
+        sendMessageFeishu({
+          cfg: {} as never,
+          to: "user:ou_target",
+          text: "hello",
+          replyToMessageId: "om_parent",
+        }),
+      "om_new",
+    );
   });
 
   it("falls back to create for withdrawn card replies", async () => {
@@ -73,16 +83,16 @@ describe("Feishu reply fallback for withdrawn/deleted targets", () => {
       data: { message_id: "om_card_new" },
     });
 
-    const result = await sendCardFeishu({
-      cfg: {} as never,
-      to: "user:ou_target",
-      card: { schema: "2.0" },
-      replyToMessageId: "om_parent",
-    });
-
-    expect(replyMock).toHaveBeenCalledTimes(1);
-    expect(createMock).toHaveBeenCalledTimes(1);
-    expect(result.messageId).toBe("om_card_new");
+    await expectFallbackResult(
+      () =>
+        sendCardFeishu({
+          cfg: {} as never,
+          to: "user:ou_target",
+          card: { schema: "2.0" },
+          replyToMessageId: "om_parent",
+        }),
+      "om_card_new",
+    );
   });
 
   it("still throws for non-withdrawn reply failures", async () => {
@@ -111,16 +121,16 @@ describe("Feishu reply fallback for withdrawn/deleted targets", () => {
       data: { message_id: "om_thrown_fallback" },
     });
 
-    const result = await sendMessageFeishu({
-      cfg: {} as never,
-      to: "user:ou_target",
-      text: "hello",
-      replyToMessageId: "om_parent",
-    });
-
-    expect(replyMock).toHaveBeenCalledTimes(1);
-    expect(createMock).toHaveBeenCalledTimes(1);
-    expect(result.messageId).toBe("om_thrown_fallback");
+    await expectFallbackResult(
+      () =>
+        sendMessageFeishu({
+          cfg: {} as never,
+          to: "user:ou_target",
+          text: "hello",
+          replyToMessageId: "om_parent",
+        }),
+      "om_thrown_fallback",
+    );
   });
 
   it("falls back to create when card reply throws a not-found AxiosError", async () => {
@@ -133,16 +143,16 @@ describe("Feishu reply fallback for withdrawn/deleted targets", () => {
       data: { message_id: "om_axios_fallback" },
     });
 
-    const result = await sendCardFeishu({
-      cfg: {} as never,
-      to: "user:ou_target",
-      card: { schema: "2.0" },
-      replyToMessageId: "om_parent",
-    });
-
-    expect(replyMock).toHaveBeenCalledTimes(1);
-    expect(createMock).toHaveBeenCalledTimes(1);
-    expect(result.messageId).toBe("om_axios_fallback");
+    await expectFallbackResult(
+      () =>
+        sendCardFeishu({
+          cfg: {} as never,
+          to: "user:ou_target",
+          card: { schema: "2.0" },
+          replyToMessageId: "om_parent",
+        }),
+      "om_axios_fallback",
+    );
   });
 
   it("re-throws non-withdrawn thrown errors for text messages", async () => {
diff --git a/extensions/feishu/src/send.ts b/extensions/feishu/src/send.ts
index 5bfa836e0a6..5692edd32ff 100644
--- a/extensions/feishu/src/send.ts
+++ b/extensions/feishu/src/send.ts
@@ -55,6 +55,30 @@ type FeishuCreateMessageClient = {
   };
 };
 
+type FeishuMessageSender = {
+  id?: string;
+  id_type?: string;
+  sender_type?: string;
+};
+
+type FeishuMessageGetItem = {
+  message_id?: string;
+  chat_id?: string;
+  chat_type?: FeishuChatType;
+  msg_type?: string;
+  body?: { content?: string };
+  sender?: FeishuMessageSender;
+  create_time?: string;
+};
+
+type FeishuGetMessageResponse = {
+  code?: number;
+  msg?: string;
+  data?: FeishuMessageGetItem & {
+    items?: FeishuMessageGetItem[];
+  };
+};
+
 /** Send a direct message as a fallback when a reply target is unavailable. */
 async function sendFallbackDirect(
   client: FeishuCreateMessageClient,
@@ -214,36 +238,7 @@ export async function getMessageFeishu(params: {
   try {
     const response = (await client.im.message.get({
       path: { message_id: messageId },
-    })) as {
-      code?: number;
-      msg?: string;
-      data?: {
-        items?: Array<{
-          message_id?: string;
-          chat_id?: string;
-          chat_type?: FeishuChatType;
-          msg_type?: string;
-          body?: { content?: string };
-          sender?: {
-            id?: string;
-            id_type?: string;
-            sender_type?: string;
-          };
-          create_time?: string;
-        }>;
-        message_id?: string;
-        chat_id?: string;
-        chat_type?: FeishuChatType;
-        msg_type?: string;
-        body?: { content?: string };
-        sender?: {
-          id?: string;
-          id_type?: string;
-          sender_type?: string;
-        };
-        create_time?: string;
-      };
-    };
+    })) as FeishuGetMessageResponse;
 
     if (response.code !== 0) {
       return null;