diff --git a/Projects/Chat/Sources/View/ChatViewController.swift b/Projects/Chat/Sources/View/ChatViewController.swift
index e5aee2b..5811540 100644
--- a/Projects/Chat/Sources/View/ChatViewController.swift
+++ b/Projects/Chat/Sources/View/ChatViewController.swift
@@ -5,4 +5,126 @@
 //  Created by 박지윤 on 7/1/25.
 //
 
+import UIKit
+import CommonUI
+import RxSwift
+import Domain
 
+public class ChatViewController: BaseViewController {
+    let viewModel: ChatViewModel
+    let chatView = ChatView()
+
+    private var messages: [ChatMessageVO] = []
+
+    public init(chatViewModel: ChatViewModel) {
+        self.viewModel = chatViewModel
+        super.init()
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    public override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        self.navigationController?.setNavigationBarHidden(true, animated: false)
+    }
+
+    public override func viewDidLoad() {
+        super.viewDidLoad()
+        setupViewProperty()
+        setupHierarchy()
+        setupLayout()
+        bindData()
+        bindActions()
+        setupTextFieldActions()
+        viewModel.startTextChat()
+    }
+
+    public override func setupViewProperty() {
+        view.backgroundColor = CommonUIAssets.LMOrange4
+    }
+
+    public override func setupHierarchy() {
+        view.addSubview(chatView)
+    }
+
+    public override func setupDelegate() {
+    }
+
+    public override func setupLayout() {
+        chatView.snp.makeConstraints {
+            $0.edges.equalToSuperview()
+        }
+    }
+
+    private func bindData() {
+        viewModel.chatSubject
+            .observe(on: MainScheduler.instance)
+            .subscribe(onNext: { [weak self] (chat: ChatVO) in
+                print("📨 ChatVO 수신: \(chat)")
+                self?.updateRecommendTopics(chat.recommendSubjects)
+            })
+            .disposed(by: disposeBag)
+            
+        viewModel.messageSubject
+            .observe(on: MainScheduler.instance)
+            .subscribe(onNext: { [weak self] (message: ChatMessageVO) in
+                print("📨 메시지 수신: \(message)")
+                self?.addMessageToUI(message)
+            })
+            .disposed(by: disposeBag)
+    }
+    
+    private func bindActions() {
+        chatView.onSendButtonTapped = { [weak self] message in
+            self?.sendMessage(message)
+        }
+    }
+    
+    private func setupTextFieldActions() {
+        chatView.chatTextField.addTarget(self, action: #selector(textFieldDidChange), for: .editingChanged)
+    }
+
+    @objc private func textFieldDidChange() {
+        let text = chatView.chatTextField.text ?? ""
+        chatView.sendButton.isEnabled = !text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
+    }
+
+    private func sendMessage(_ text: String) {
+        // 첫 번째 메시지 전송 시 추천 섹션 숨기기
+        if messages.isEmpty {
+            chatView.hideRecommendSection()
+        }
+        
+        // 사용자 메시지 UI에 추가
+        let userMessage = ChatMessageVO(chatId: 0, author: "HUMAN", content: text)
+        addMessageToUI(userMessage)
+        
+        // API 호출
+        viewModel.sendMessage(content: text)
+        
+        // 텍스트 필드 초기화 및 버튼 비활성화
+        chatView.chatTextField.text = ""
+        chatView.sendButton.isEnabled = false
+    }
+    
+    private func addMessageToUI(_ message: ChatMessageVO) {
+        messages.append(message)
+        chatView.addMessageToUI(message)
+    }
+
+    private func updateRecommendTopics(_ topics: [String]) {
+        print("🔄 추천 주제 업데이트: \(topics)")
+        
+        guard !topics.isEmpty else {
+            print("⚠️ 추천 주제가 비어있습니다")
+            return
+        }
+
+        // ChatView의 recommendTexts 프로퍼티로 간단하게 업데이트
+        chatView.recommendTexts = topics
+        
+        print("✅ 추천 주제 업데이트 완료: \(topics.count)개")
+    }
+}
diff --git a/Projects/Chat/Sources/ViewModel/ChatViewModel.swift b/Projects/Chat/Sources/ViewModel/ChatViewModel.swift
index 2fbe7f4..c9000c7 100644
--- a/Projects/Chat/Sources/ViewModel/ChatViewModel.swift
+++ b/Projects/Chat/Sources/ViewModel/ChatViewModel.swift
@@ -4,3 +4,53 @@
 //
 //  Created by 박지윤 on 7/1/25.
 //
+
+import Domain
+import RxSwift
+
+protocol ChatViewModelProtocol {
+    func startTextChat()
+    func sendMessage(content: String)
+}
+
+public class ChatViewModel: ChatViewModelProtocol {
+    private let disposeBag = DisposeBag()
+    private let chatUseCase: ChatUseCase
+    private let tokenUseCase: TokenUseCase
+
+    let chatSubject = PublishSubject<ChatVO>()
+    let messageSubject = PublishSubject<ChatMessageVO>()
+    private var currentChatRoomId: Int = 0
+
+    public init(chatUseCase: ChatUseCase,
+                tokenUseCase: TokenUseCase) {
+        self.chatUseCase = chatUseCase
+        self.tokenUseCase = tokenUseCase
+    }
+
+    func startTextChat() {
+        chatUseCase.postChatStart()
+            .subscribe(onSuccess: { [weak self] chat in
+                print("✅ 텍스트 대화 시작 성공: \(chat)")
+                self?.currentChatRoomId = chat.chatRoomId
+                self?.chatSubject.onNext(chat)
+            }, onFailure: { error in
+                print("❌ 텍스트 대화 시작 실패: \(error)")
+            }).disposed(by: disposeBag)
+    }
+
+    func sendMessage(content: String) {
+        guard !content.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
+            print("⚠️ 빈 메시지는 전송할 수 없습니다")
+            return 
+        }
+
+        chatUseCase.postChat(chatRoomId: currentChatRoomId, content: content)
+            .subscribe(onSuccess: { [weak self] message in
+                print("✅ 메시지 전송 성공: \(message)")
+                self?.messageSubject.onNext(message)
+            }, onFailure: { error in
+                print("❌ 메시지 전송 실패: \(error)")
+            }).disposed(by: disposeBag)
+    }
+}
diff --git a/Projects/CommonUI/CommonUI.xcodeproj/project.pbxproj b/Projects/CommonUI/CommonUI.xcodeproj/project.pbxproj
index 1ae3142..473999c 100644
--- a/Projects/CommonUI/CommonUI.xcodeproj/project.pbxproj
+++ b/Projects/CommonUI/CommonUI.xcodeproj/project.pbxproj
@@ -194,13 +194,21 @@
 			path = Extension;
 			sourceTree = "<group>";
 		};
+		951F3F852E6DDE7F0022583B /* Chat */ = {
+			isa = PBXGroup;
+			children = (
+				3EBDD10D8389EBB23B42C54F /* ChatView.swift */,
+			);
+			path = Chat;
+			sourceTree = "<group>";
+		};
 		9786E1056828B1E6D5EDAB7C /* View */ = {
 			isa = PBXGroup;
 			children = (
 				DFA6DB2905DB98838A8AEA6F /* Home */,
 				4F020027E0FF96E7A77E5F05 /* Login */,
 				7F5AEF3C3719E8689E7AF017 /* Navigation */,
-				3EBDD10D8389EBB23B42C54F /* ChatView.swift */,
+				951F3F852E6DDE7F0022583B /* Chat */,
 				C28FE6392E1612667826E5C5 /* DiaryView.swift */,
 				9266801EFBA6178C5B70C641 /* MyPageView.swift */,
 			);
diff --git a/Projects/CommonUI/Sources/Assets/Colors.xcassets/LMPointColor/LMBlue02.colorset/Contents.json b/Projects/CommonUI/Sources/Assets/Colors.xcassets/LMPointColor/LMBlue02.colorset/Contents.json
new file mode 100644
index 0000000..ad76e7f
--- /dev/null
+++ b/Projects/CommonUI/Sources/Assets/Colors.xcassets/LMPointColor/LMBlue02.colorset/Contents.json
@@ -0,0 +1,38 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0xEA",
+          "green" : "0x77",
+          "red" : "0x1A"
+        }
+      },
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0xEA",
+          "green" : "0x77",
+          "red" : "0x1A"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/Contents.json b/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/Contents.json
new file mode 100644
index 0000000..69d2bb8
--- /dev/null
+++ b/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/Contents.json
@@ -0,0 +1,22 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "send@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "send@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/send@2x.png b/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/send@2x.png
new file mode 100644
index 0000000..fda7299
Binary files /dev/null and b/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/send@2x.png differ
diff --git a/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/send@3x.png b/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/send@3x.png
new file mode 100644
index 0000000..9fc1db5
Binary files /dev/null and b/Projects/CommonUI/Sources/Assets/Images.xcassets/Icon/send.imageset/send@3x.png differ
diff --git a/Projects/CommonUI/Sources/Enum/CommonUIAssets.swift b/Projects/CommonUI/Sources/Enum/CommonUIAssets.swift
index c07b092..9447024 100644
--- a/Projects/CommonUI/Sources/Enum/CommonUIAssets.swift
+++ b/Projects/CommonUI/Sources/Enum/CommonUIAssets.swift
@@ -49,6 +49,7 @@ public enum CommonUIAssets {
     /// * Icon
     public static let IconPlay = image(named: "play")
     public static let IconBack = image(named: "back")
+    public static let IconSend = image(named: "send")
 
     /// color
     public static let LMOrange1 = color(named: "LMOrange01")
@@ -62,6 +63,7 @@ public enum CommonUIAssets {
     public static let LMGray5 = color(named: "LMGray05")
     public static let LMGray6 = color(named: "LMGray06")
     public static let LMBlue = color(named: "LMBlue")
+    public static let LMBlue2 = color(named: "LMBlue02")
     public static let LMGreen = color(named: "LMGreen")
     public static let LMRed = color(named: "LMRed")
     public static let LMRed2 = color(named: "LMRed02")
diff --git a/Projects/CommonUI/Sources/View/Chat/ChatView.swift b/Projects/CommonUI/Sources/View/Chat/ChatView.swift
new file mode 100644
index 0000000..3ab2d84
--- /dev/null
+++ b/Projects/CommonUI/Sources/View/Chat/ChatView.swift
@@ -0,0 +1,291 @@
+//
+//  ChatView.swift
+//  CommonUI
+//
+//  Created by 박지윤 on 7/1/25.
+//
+
+import Domain
+import UIKit
+import SnapKit
+import RxSwift
+import Then
+import RxRelay
+
+open class ChatView: UIView {
+    let titleLabel = UILabel().then {
+        $0.text = "AI와 텍스트로 대화하세요"
+        $0.textColor = .black
+        $0.font = UIFont.systemFont(ofSize: 24, weight: .semibold)
+    }
+
+    let subtitleLabel = UILabel().then {
+        $0.text = "메세지를 입력하고 전송해보세요"
+        $0.textColor = CommonUIAssets.LMGray3
+        $0.font = UIFont.systemFont(ofSize: 15, weight: .regular)
+    }
+
+    let recommendTitleLabel = UILabel().then {
+        $0.text = "AI 추천 대화 주제"
+        $0.textColor = CommonUIAssets.LMGray1
+        $0.font = UIFont.systemFont(ofSize: 18, weight: .regular)
+    }
+
+    let endButton = UIButton().then {
+        $0.setTitle("대화 종료하기", for: .normal)
+        $0.setTitleColor(CommonUIAssets.LMGray1, for: .normal)
+        $0.titleLabel?.font = UIFont.systemFont(ofSize: 12, weight: .semibold)
+        $0.backgroundColor = CommonUIAssets.LMRed
+        $0.layer.cornerRadius = 10
+    }
+
+    public let recommendStackView = UIStackView().then {
+        $0.axis = .vertical
+        $0.spacing = 11
+    }
+
+    // 채팅 관련 UI 요소들 추가
+    let chatScrollView = UIScrollView().then {
+        $0.showsVerticalScrollIndicator = true
+        $0.alwaysBounceVertical = true
+    }
+    
+    let chatStackView = UIStackView().then {
+        $0.axis = .vertical
+        $0.spacing = 12
+        $0.alignment = .fill
+    }
+
+    // 추천 뷰와 라벨을 배열로 관리
+    private let recommendViews: [UIView] = (0..<3).map { _ in
+        UIView().then {
+            $0.backgroundColor = .white
+            $0.layer.cornerRadius = 10
+            $0.layer.borderWidth = 1
+            $0.layer.borderColor = CommonUIAssets.LMGray5?.cgColor
+        }
+    }
+    
+    private let recommendLabels: [UILabel] = (0..<3).map { _ in
+        UILabel().then {
+            $0.textColor = CommonUIAssets.LMGray3
+            $0.font = UIFont.systemFont(ofSize: 16, weight: .regular)
+            $0.textAlignment = .center
+            $0.numberOfLines = 0
+        }
+    }
+    
+    // 외부에서 접근할 수 있도록 public 프로퍼티 제공
+    public var recommendTexts: [String] {
+        get { recommendLabels.map { $0.text ?? "" } }
+        set {
+            for (index, text) in newValue.enumerated() {
+                if index < recommendLabels.count {
+                    recommendLabels[index].text = text
+                }
+            }
+        }
+    }
+
+    public let chatTextField = UITextField().then {
+        $0.placeholder = "메세지를 입력하세요..."
+        $0.backgroundColor = .white
+        $0.layer.cornerRadius = 10
+        $0.layer.borderWidth = 1
+        $0.layer.borderColor = CommonUIAssets.LMGray5?.cgColor
+        $0.leftView = UIView(frame: CGRect(x: 0, y: 0, width: 16, height: 0))
+        $0.leftViewMode = .always
+    }
+
+    public let sendButton = UIButton().then {
+        $0.setImage(CommonUIAssets.IconSend, for: .normal)
+        $0.backgroundColor = CommonUIAssets.LMBlue2
+        $0.layer.cornerRadius = 22
+        $0.isEnabled = false
+    }
+
+    let disposeBag = DisposeBag()
+    
+    public var onSendButtonTapped: ((String) -> Void)?
+
+    public override init(frame: CGRect) {
+        super.init(frame: frame)
+        initAttribute()
+        initUI()
+        bindEvents()
+    }
+
+    func bindEvents() {
+        sendButton.rx.tap
+            .withLatestFrom(chatTextField.rx.text.orEmpty)
+            .subscribe(onNext: { [weak self] text in
+                self?.onSendButtonTapped?(text)
+                self?.chatTextField.text = ""
+            })
+            .disposed(by: disposeBag)
+    }
+
+    func initAttribute() {
+        self.backgroundColor = CommonUIAssets.LMOrange4
+    }
+
+    func initUI() {
+        [titleLabel, subtitleLabel, endButton, recommendTitleLabel, recommendStackView, chatScrollView, chatTextField, sendButton].forEach { self.addSubview($0) }
+        
+        // 채팅 스택뷰를 스크롤뷰에 추가
+        chatScrollView.addSubview(chatStackView)
+        
+        // 추천 뷰들을 StackView에 추가하고 각각에 라벨 추가
+        for (view, label) in zip(recommendViews, recommendLabels) {
+            recommendStackView.addArrangedSubview(view)
+            view.addSubview(label)
+            
+            // 뷰 높이 설정
+            view.snp.makeConstraints { $0.height.equalTo(40) }
+            
+            // 라벨 레이아웃 설정
+            label.snp.makeConstraints {
+                $0.center.equalToSuperview()
+                $0.leading.trailing.equalToSuperview().inset(16)
+            }
+        }
+
+        titleLabel.snp.makeConstraints {
+            $0.top.equalTo(self.safeAreaLayoutGuide).offset(20)
+            $0.leading.equalToSuperview().inset(20)
+        }
+        
+        subtitleLabel.snp.makeConstraints {
+            $0.top.equalTo(titleLabel.snp.bottom).offset(10)
+            $0.leading.equalToSuperview().inset(20)
+        }
+
+        endButton.snp.makeConstraints {
+            $0.centerY.equalTo(titleLabel)
+            $0.height.equalTo(30)
+            $0.width.equalTo(82)
+            $0.trailing.equalToSuperview().inset(20)
+        }
+
+        recommendTitleLabel.snp.makeConstraints {
+            $0.centerX.equalToSuperview()
+            $0.centerY.equalToSuperview().offset(-95)
+        }
+
+        recommendStackView.snp.makeConstraints {
+            $0.width.equalTo(280)
+            $0.centerX.equalToSuperview()
+            $0.top.equalTo(recommendTitleLabel.snp.bottom).offset(18)
+        }
+
+        // 채팅 스크롤뷰 레이아웃 (초기에는 추천 섹션 아래에 위치)
+        chatScrollView.snp.makeConstraints {
+            $0.top.equalTo(recommendStackView.snp.bottom).offset(20)
+            $0.leading.trailing.equalToSuperview().inset(20)
+            $0.bottom.equalTo(chatTextField.snp.top).offset(-20)
+        }
+        
+        // 채팅 스택뷰 레이아웃
+        chatStackView.snp.makeConstraints {
+            $0.edges.equalToSuperview()
+            $0.width.equalToSuperview()
+        }
+
+        chatTextField.snp.makeConstraints {
+            $0.centerY.equalTo(sendButton)
+            $0.leading.equalToSuperview().inset(20)
+            $0.height.equalTo(44)
+            $0.trailing.equalTo(sendButton.snp.leading).offset(-20)
+        }
+
+        sendButton.snp.makeConstraints {
+            $0.bottom.equalTo(self.safeAreaLayoutGuide).offset(-30)
+            $0.height.width.equalTo(44)
+            $0.trailing.equalToSuperview().inset(20)
+        }
+    }
+
+    // 추천 섹션 숨기기 메서드
+    public func hideRecommendSection() {
+        UIView.animate(withDuration: 0.3) {
+            self.recommendTitleLabel.alpha = 0
+            self.recommendStackView.alpha = 0
+        } completion: { _ in
+            self.recommendTitleLabel.isHidden = true
+            self.recommendStackView.isHidden = true
+            
+            // 채팅 영역을 위로 확장
+            self.chatScrollView.snp.remakeConstraints {
+                $0.top.equalTo(self.subtitleLabel.snp.bottom).offset(20)
+                $0.leading.trailing.equalToSuperview().inset(20)
+                $0.bottom.equalTo(self.chatTextField.snp.top).offset(-20)
+            }
+            
+            UIView.animate(withDuration: 0.3) {
+                self.layoutIfNeeded()
+            }
+        }
+    }
+    
+    // 메시지 추가 메서드
+    public func addMessageToUI(_ message: ChatMessageVO) {
+        let messageView = createMessageView(message)
+        chatStackView.addArrangedSubview(messageView)
+        
+        // 스크롤을 맨 아래로
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+            let bottomOffset = CGPoint(
+                x: 0,
+                y: self.chatScrollView.contentSize.height - self.chatScrollView.bounds.height
+            )
+            if bottomOffset.y > 0 {
+                self.chatScrollView.setContentOffset(bottomOffset, animated: true)
+            }
+        }
+    }
+    
+    // 메시지 뷰 생성 메서드
+    private func createMessageView(_ message: ChatMessageVO) -> UIView {
+        let containerView = UIView()
+        
+        let bubbleView = UIView().then {
+            $0.layer.cornerRadius = 16
+            $0.backgroundColor = message.author == "HUMAN" ? CommonUIAssets.LMBlue2 : UIColor(red: 0.9, green: 0.9, blue: 0.9, alpha: 1.0)
+        }
+        
+        let messageLabel = UILabel().then {
+            $0.text = message.content
+            $0.textColor = message.author == "HUMAN" ? .white : .black
+            $0.font = .systemFont(ofSize: 16, weight: .regular)
+            $0.numberOfLines = 0
+        }
+        
+        containerView.addSubview(bubbleView)
+        bubbleView.addSubview(messageLabel)
+        
+        // 메시지 정렬 (사용자는 오른쪽, AI는 왼쪽)
+        if message.author == "HUMAN" {
+            bubbleView.snp.makeConstraints {
+                $0.top.bottom.equalToSuperview()
+                $0.trailing.equalToSuperview()
+                $0.width.lessThanOrEqualTo(250)
+            }
+        } else {
+            bubbleView.snp.makeConstraints {
+                $0.top.bottom.equalToSuperview()
+                $0.leading.equalToSuperview()
+                $0.width.lessThanOrEqualTo(250)
+            }
+        }
+        
+        messageLabel.snp.makeConstraints {
+            $0.edges.equalToSuperview().inset(12)
+        }
+        
+        return containerView
+    }
+
+    required public init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+}
diff --git a/Projects/CommonUI/Sources/View/ChatView.swift b/Projects/CommonUI/Sources/View/ChatView.swift
deleted file mode 100644
index 341c8be..0000000
--- a/Projects/CommonUI/Sources/View/ChatView.swift
+++ /dev/null
@@ -1,6 +0,0 @@
-//
-//  ChatView.swift
-//  CommonUI
-//
-//  Created by 박지윤 on 7/1/25.
-//
diff --git a/Projects/Data/Data.xcodeproj/project.pbxproj b/Projects/Data/Data.xcodeproj/project.pbxproj
index c9e0efb..e90f791 100644
--- a/Projects/Data/Data.xcodeproj/project.pbxproj
+++ b/Projects/Data/Data.xcodeproj/project.pbxproj
@@ -13,6 +13,8 @@
 		901ACA7B98089AB702ADA830 /* Domain.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 06FAA1459D11CCE724C34195 /* Domain.framework */; };
 		950A0D702E5CCF0200C07CF2 /* SignRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 950A0D6F2E5CCEFD00C07CF2 /* SignRepository.swift */; };
 		950A0D902E6039D600C07CF2 /* DefaultDTO.swift in Sources */ = {isa = PBXBuildFile; fileRef = 950A0D8F2E6039D300C07CF2 /* DefaultDTO.swift */; };
+		951F3F8F2E6F36450022583B /* ChatDTO.swift in Sources */ = {isa = PBXBuildFile; fileRef = 951F3F8E2E6F36440022583B /* ChatDTO.swift */; };
+		951F3F912E6F36680022583B /* ChatRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 951F3F902E6F36640022583B /* ChatRepository.swift */; };
 		A334985695DC9388841BBC43 /* QuizRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3CCA951B89F2C3D20AA31F7F /* QuizRepository.swift */; };
 		B2F8FBFA915F696CCCA4152A /* Alamofire.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = A3B0D3D8C7049B6856791C1D /* Alamofire.framework */; };
 		E1BFC73FB539432F6E12CD94 /* CourseRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = B0730BC3657E24BCEA511A3C /* CourseRepository.swift */; };
@@ -45,6 +47,8 @@
 		77810122262C6CB16D4D47DA /* QuizDTO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QuizDTO.swift; sourceTree = "<group>"; };
 		950A0D6F2E5CCEFD00C07CF2 /* SignRepository.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SignRepository.swift; sourceTree = "<group>"; };
 		950A0D8F2E6039D300C07CF2 /* DefaultDTO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DefaultDTO.swift; sourceTree = "<group>"; };
+		951F3F8E2E6F36440022583B /* ChatDTO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChatDTO.swift; sourceTree = "<group>"; };
+		951F3F902E6F36640022583B /* ChatRepository.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChatRepository.swift; sourceTree = "<group>"; };
 		A3B0D3D8C7049B6856791C1D /* Alamofire.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Alamofire.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		A44BC1E2E75FC256F832CA38 /* LoginDTO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginDTO.swift; sourceTree = "<group>"; };
 		AAAC2885ACFE998578DC25E8 /* CourseDTO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CourseDTO.swift; sourceTree = "<group>"; };
@@ -77,6 +81,7 @@
 		647255CD65221C9CD4A43DED /* DTO */ = {
 			isa = PBXGroup;
 			children = (
+				951F3F8E2E6F36440022583B /* ChatDTO.swift */,
 				950A0D8F2E6039D300C07CF2 /* DefaultDTO.swift */,
 				AAAC2885ACFE998578DC25E8 /* CourseDTO.swift */,
 				A44BC1E2E75FC256F832CA38 /* LoginDTO.swift */,
@@ -88,6 +93,7 @@
 		73F3ED55BFDC2EF15878F5B6 /* Repository */ = {
 			isa = PBXGroup;
 			children = (
+				951F3F902E6F36640022583B /* ChatRepository.swift */,
 				950A0D6F2E5CCEFD00C07CF2 /* SignRepository.swift */,
 				B0730BC3657E24BCEA511A3C /* CourseRepository.swift */,
 				3D7624DE90CFBBEF778E120E /* LoginRepository.swift */,
@@ -217,7 +223,9 @@
 				E9463A3FF42D5F0960245F80 /* QuizDTO.swift in Sources */,
 				684AAEA9796EED3F9FC592FC /* NetworkConfiguration.swift in Sources */,
 				950A0D702E5CCF0200C07CF2 /* SignRepository.swift in Sources */,
+				951F3F8F2E6F36450022583B /* ChatDTO.swift in Sources */,
 				E1BFC73FB539432F6E12CD94 /* CourseRepository.swift in Sources */,
+				951F3F912E6F36680022583B /* ChatRepository.swift in Sources */,
 				34FD760EB97BB96E9D770BF0 /* LoginRepository.swift in Sources */,
 				950A0D902E6039D600C07CF2 /* DefaultDTO.swift in Sources */,
 				A334985695DC9388841BBC43 /* QuizRepository.swift in Sources */,
diff --git a/Projects/Data/Sources/DTO/ChatDTO.swift b/Projects/Data/Sources/DTO/ChatDTO.swift
new file mode 100644
index 0000000..bad3905
--- /dev/null
+++ b/Projects/Data/Sources/DTO/ChatDTO.swift
@@ -0,0 +1,56 @@
+//
+//  ChatDTO.swift
+//  Data
+//
+//  Created by 박지윤 on 9/9/25.
+//
+
+import Domain
+
+public struct ChatResponseDTO: Decodable {
+    public let is_success: Bool
+    public let code: String
+    public let message: String
+    public let data: ChatDataDTO
+}
+
+public struct ChatDataDTO: Decodable {
+    public let chatRoomId: Int
+    public let recommendSubjects: [String]
+}
+
+extension ChatDataDTO {
+    func toDomain() -> ChatVO {
+        return ChatVO(
+            chatRoomId: chatRoomId,
+            recommendSubjects: recommendSubjects
+        )
+    }
+}
+
+public struct ChatMessageResponseDTO: Decodable {
+    public let is_success: Bool
+    public let code: String
+    public let message: String
+    public let data: ChatMessageDataDTO
+}
+
+public struct ChatMessageDataDTO: Decodable {
+    public let chatId: Int
+    public let author: String
+    public let content: String
+}
+
+public struct ChatMessageRequestDTO: Encodable {
+    public let content: String
+}
+
+extension ChatMessageDataDTO {
+    func toDomain() -> ChatMessageVO {
+        return ChatMessageVO(
+            chatId: chatId,
+            author: author,
+            content: content
+        )
+    }
+}
diff --git a/Projects/Data/Sources/Repository/ChatRepository.swift b/Projects/Data/Sources/Repository/ChatRepository.swift
new file mode 100644
index 0000000..38ac1a8
--- /dev/null
+++ b/Projects/Data/Sources/Repository/ChatRepository.swift
@@ -0,0 +1,84 @@
+//
+//  ChatRepository.swift
+//  Data
+//
+//  Created by 박지윤 on 9/9/25.
+//
+
+import Domain
+import RxSwift
+import Alamofire
+
+public class DefaultChatRepository: ChatRepository {
+    private let tokenRepository: TokenRepository
+
+    public init(tokenRepository: TokenRepository) {
+        self.tokenRepository = tokenRepository
+    }
+
+    public func postChatStart() -> Single<ChatVO> {
+        return Single.create { single in
+            let url = "\(NetworkConfiguration.baseUrl)/api/chats/text"
+            var headers: HTTPHeaders = [:]
+            
+            if let token = self.tokenRepository.getAccessToken() {
+                headers.add(name: "Authorization", value: "Bearer \(token)")
+            }
+            
+            print("[텍스트 대화 시작 POST] URL: \(url)")
+            print("[텍스트 대화 시작 POST] 헤더: \(headers)")
+
+            let request = AF.request(url,
+                                     method: .post,
+                                     encoding: JSONEncoding.default,
+                                     headers: headers)
+                .validate()
+                .responseDecodable(of: ChatResponseDTO.self) { response in
+                    switch response.result {
+                    case .success(let value):
+                        print("[텍스트 대화 시작 POST] 성공: \(value)")
+                        single(.success(value.data.toDomain()))
+                    case .failure(let error):
+                        print("[텍스트 대화 시작 POST] 실패: \(error)")
+                        single(.failure(error))
+                    }
+                }
+            return Disposables.create { request.cancel() }
+        }
+    }
+
+    public func postChat(chatRoomId: Int, content: String) -> Single<ChatMessageVO> {
+           return Single.create { single in
+               let url = "\(NetworkConfiguration.baseUrl)/api/chats/text/\(chatRoomId)"
+               var headers: HTTPHeaders = [:]
+               
+               if let token = self.tokenRepository.getAccessToken() {
+                   headers.add(name: "Authorization", value: "Bearer \(token)")
+               }
+               
+               let requestBody = ChatMessageRequestDTO(content: content)
+               
+               print("[메시지 전송 POST] URL: \(url)")
+               print("[메시지 전송 POST] 헤더: \(headers)")
+               print("[메시지 전송 POST] 요청 내용: \(content)")
+               
+               let request = AF.request(url,
+                                        method: .post,
+                                        parameters: requestBody,
+                                        encoder: JSONParameterEncoder.default,
+                                        headers: headers)
+                   .validate()
+                   .responseDecodable(of: ChatMessageResponseDTO.self) { response in
+                       switch response.result {
+                       case .success(let value):
+                           print("[메시지 전송 POST] 성공: \(value)")
+                           single(.success(value.data.toDomain()))
+                       case .failure(let error):
+                           print("[메시지 전송 POST] 실패: \(error)")
+                           single(.failure(error))
+                       }
+                   }
+               return Disposables.create { request.cancel() }
+           }
+       }
+}
diff --git a/Projects/Data/Sources/Repository/TokenRepository.swift b/Projects/Data/Sources/Repository/TokenRepository.swift
index 59438cd..c3fc51a 100644
--- a/Projects/Data/Sources/Repository/TokenRepository.swift
+++ b/Projects/Data/Sources/Repository/TokenRepository.swift
@@ -17,7 +17,7 @@ public class DefaultTokenRepository: TokenRepository {
         // Initialization if needed
     }
     
-    public func saveAccessToken(_ token: String) {
+    public func saveAccessToken(token: String) {
         userDefaults.set(token, forKey: accessToken)
         print("✅ Access Token saved: \(token)")
     }
diff --git a/Projects/Domain/Domain.xcodeproj/project.pbxproj b/Projects/Domain/Domain.xcodeproj/project.pbxproj
index 27d2c4a..30ba42e 100644
--- a/Projects/Domain/Domain.xcodeproj/project.pbxproj
+++ b/Projects/Domain/Domain.xcodeproj/project.pbxproj
@@ -18,6 +18,9 @@
 		950A0D6B2E5CCBF000C07CF2 /* SignRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 950A0D6A2E5CCBE800C07CF2 /* SignRepository.swift */; };
 		950A0D822E5DE10C00C07CF2 /* LoginUseCase.swift in Sources */ = {isa = PBXBuildFile; fileRef = 950A0D812E5DE10700C07CF2 /* LoginUseCase.swift */; };
 		950A0D922E603DA100C07CF2 /* DefaultVO.swift in Sources */ = {isa = PBXBuildFile; fileRef = 950A0D912E603D9C00C07CF2 /* DefaultVO.swift */; };
+		951F3F892E6DE1F80022583B /* ChatUseCase.swift in Sources */ = {isa = PBXBuildFile; fileRef = 951F3F882E6DE1F60022583B /* ChatUseCase.swift */; };
+		951F3F8B2E6DE2140022583B /* ChatRepository.swift in Sources */ = {isa = PBXBuildFile; fileRef = 951F3F8A2E6DE2100022583B /* ChatRepository.swift */; };
+		951F3F8D2E6F360C0022583B /* ChatVO.swift in Sources */ = {isa = PBXBuildFile; fileRef = 951F3F8C2E6F36090022583B /* ChatVO.swift */; };
 		95369A7E2E28B8D9000C893F /* UIImage+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 95369A7D2E28B8D1000C893F /* UIImage+Extension.swift */; };
 		A0CEC5A2E5A76EBD987CE37D /* StepVO.swift in Sources */ = {isa = PBXBuildFile; fileRef = 798CFC331192C9FE77F3446A /* StepVO.swift */; };
 		B0B0382EF5DFDACDD3EB8A75 /* QuizUseCase.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F4565F6A02AFBF3D9A0D41B /* QuizUseCase.swift */; };
@@ -55,6 +58,9 @@
 		950A0D6A2E5CCBE800C07CF2 /* SignRepository.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SignRepository.swift; sourceTree = "<group>"; };
 		950A0D812E5DE10700C07CF2 /* LoginUseCase.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginUseCase.swift; sourceTree = "<group>"; };
 		950A0D912E603D9C00C07CF2 /* DefaultVO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DefaultVO.swift; sourceTree = "<group>"; };
+		951F3F882E6DE1F60022583B /* ChatUseCase.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChatUseCase.swift; sourceTree = "<group>"; };
+		951F3F8A2E6DE2100022583B /* ChatRepository.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChatRepository.swift; sourceTree = "<group>"; };
+		951F3F8C2E6F36090022583B /* ChatVO.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChatVO.swift; sourceTree = "<group>"; };
 		95369A7D2E28B8D1000C893F /* UIImage+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIImage+Extension.swift"; sourceTree = "<group>"; };
 		9A2E30672E510822AAF38EAD /* RxSwift.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = RxSwift.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		ABB8C62A6FE12783AD3819BE /* TokenUseCase.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TokenUseCase.swift; sourceTree = "<group>"; };
@@ -118,6 +124,7 @@
 		2BE278B80FDD95404961E580 /* UseCase */ = {
 			isa = PBXGroup;
 			children = (
+				951F3F882E6DE1F60022583B /* ChatUseCase.swift */,
 				950A0D672E5CCBAC00C07CF2 /* Login */,
 				F904C836B5CD2D4DA5EAE38D /* CourseUseCase.swift */,
 				6F4565F6A02AFBF3D9A0D41B /* QuizUseCase.swift */,
@@ -155,6 +162,7 @@
 		9C17CEB3595F4C3FA69C5BAF /* VO */ = {
 			isa = PBXGroup;
 			children = (
+				951F3F8C2E6F36090022583B /* ChatVO.swift */,
 				950A0D912E603D9C00C07CF2 /* DefaultVO.swift */,
 				747DBBCAB797E5E0A82177F2 /* CourseVO.swift */,
 				FD08A7186FB9676854B7AEAC /* LoginVO.swift */,
@@ -167,6 +175,7 @@
 		BC1A55AF7DC675AFEA6E7C12 /* RepositoryProtocol */ = {
 			isa = PBXGroup;
 			children = (
+				951F3F8A2E6DE2100022583B /* ChatRepository.swift */,
 				950A0D6A2E5CCBE800C07CF2 /* SignRepository.swift */,
 				DCA3E06ED2A8180A63919B6C /* CourseRepository.swift */,
 				8A2AB67DE6AA50B3229C7A86 /* LoginRepository.swift */,
@@ -260,12 +269,15 @@
 				B0B0382EF5DFDACDD3EB8A75 /* QuizUseCase.swift in Sources */,
 				3E835D4F2E5F639557AC7C06 /* TokenUseCase.swift in Sources */,
 				5EB8590C9D2C002D0BDBC021 /* CourseVO.swift in Sources */,
+				951F3F8D2E6F360C0022583B /* ChatVO.swift in Sources */,
+				951F3F892E6DE1F80022583B /* ChatUseCase.swift in Sources */,
 				950A0D922E603DA100C07CF2 /* DefaultVO.swift in Sources */,
 				0DED9075FE34124C093D9FDF /* LoginVO.swift in Sources */,
 				95369A7E2E28B8D9000C893F /* UIImage+Extension.swift in Sources */,
 				950A0D692E5CCBB900C07CF2 /* SignUseCase.swift in Sources */,
 				CFBF3D58082C5F201FCFFD5B /* QuizVO.swift in Sources */,
 				A0CEC5A2E5A76EBD987CE37D /* StepVO.swift in Sources */,
+				951F3F8B2E6DE2140022583B /* ChatRepository.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/Projects/Domain/Sources/RepositoryProtocol/ChatRepository.swift b/Projects/Domain/Sources/RepositoryProtocol/ChatRepository.swift
new file mode 100644
index 0000000..d67b153
--- /dev/null
+++ b/Projects/Domain/Sources/RepositoryProtocol/ChatRepository.swift
@@ -0,0 +1,13 @@
+//
+//  ChatRepository.swift
+//  Domain
+//
+//  Created by 박지윤 on 9/8/25.
+//
+
+import RxSwift
+
+public protocol ChatRepository {
+    func postChatStart() -> Single<ChatVO>
+    func postChat(chatRoomId: Int, content: String) -> Single<ChatMessageVO>
+}
diff --git a/Projects/Domain/Sources/UseCase/ChatUseCase.swift b/Projects/Domain/Sources/UseCase/ChatUseCase.swift
new file mode 100644
index 0000000..ceb1f46
--- /dev/null
+++ b/Projects/Domain/Sources/UseCase/ChatUseCase.swift
@@ -0,0 +1,29 @@
+//
+//  ChatUseCase.swift
+//  Domain
+//
+//  Created by 박지윤 on 9/8/25.
+//
+
+import RxSwift
+
+public protocol ChatUseCase {
+    func postChatStart() -> Single<ChatVO>
+    func postChat(chatRoomId: Int, content: String) -> Single<ChatMessageVO>
+}
+
+public final class DefaultChatUseCase: ChatUseCase {
+    private let repository: ChatRepository
+
+    public init(repository: ChatRepository) {
+        self.repository = repository
+    }
+
+    public func postChatStart() -> Single<ChatVO> {
+        return repository.postChatStart()
+    }
+
+    public func postChat(chatRoomId: Int, content: String) -> Single<ChatMessageVO> {
+        return repository.postChat(chatRoomId: chatRoomId, content: content)
+    }
+}
diff --git a/Projects/Domain/Sources/UseCase/TokenUseCase.swift b/Projects/Domain/Sources/UseCase/TokenUseCase.swift
index 09c434f..bd1ef8a 100644
--- a/Projects/Domain/Sources/UseCase/TokenUseCase.swift
+++ b/Projects/Domain/Sources/UseCase/TokenUseCase.swift
@@ -8,7 +8,7 @@
 import RxSwift
 
 public protocol TokenUseCase {
-    func saveAccessToken(_ token: String)
+    func saveAccessToken(token: String)
     func getAccessToken() -> String?
     func clearAccessToken()
 }
@@ -20,8 +20,8 @@ public final class DefaultTokenUseCase: TokenUseCase {
         self.repository = repository
     }
     
-    public func saveAccessToken(_ token: String) {
-        repository.saveAccessToken(token)
+    public func saveAccessToken(token: String) {
+        repository.saveAccessToken(token: token)
     }
     
     public func getAccessToken() -> String? {
diff --git a/Projects/Domain/Sources/VO/ChatVO.swift b/Projects/Domain/Sources/VO/ChatVO.swift
new file mode 100644
index 0000000..7e8b9c2
--- /dev/null
+++ b/Projects/Domain/Sources/VO/ChatVO.swift
@@ -0,0 +1,28 @@
+//
+//  ChatVO.swift
+//  Domain
+//
+//  Created by 박지윤 on 9/9/25.
+//
+
+public struct ChatVO {
+    public let chatRoomId: Int
+    public let recommendSubjects: [String]
+
+    public init(chatRoomId: Int, recommendSubjects: [String]) {
+        self.chatRoomId = chatRoomId
+        self.recommendSubjects = recommendSubjects
+    }
+}
+
+public struct ChatMessageVO {
+    public let chatId: Int
+    public let author: String
+    public let content: String
+
+    public init(chatId: Int, author: String, content: String) {
+        self.chatId = chatId
+        self.author = author
+        self.content = content
+    }
+}
diff --git a/Projects/LearnMate/Sources/Application/SceneDelegate.swift b/Projects/LearnMate/Sources/Application/SceneDelegate.swift
index 6217074..8beab04 100644
--- a/Projects/LearnMate/Sources/Application/SceneDelegate.swift
+++ b/Projects/LearnMate/Sources/Application/SceneDelegate.swift
@@ -32,7 +32,8 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         injector.assemble([DataAssembly(),
                            DomainAssembly(),
                            LoginAssembly(),
-                           HomeAssembly()])
+                           HomeAssembly(),
+                           ChatAssembly()])
         appCoordinator?.start()
     }
 
@@ -60,7 +61,7 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
                 print("🔑 토큰 길이: \(token.count)")
                 
                 let tokenRepository = injector.resolve(TokenRepository.self)
-                tokenRepository.saveAccessToken(token)
+                tokenRepository.saveAccessToken(token: token)
                 
                 // 저장된 토큰 확인
                 if let savedToken = tokenRepository.getAccessToken() {
diff --git a/Projects/LearnMate/Sources/Coordinator/TabBarCoordinator.swift b/Projects/LearnMate/Sources/Coordinator/TabBarCoordinator.swift
index 1b4439d..97d0b2f 100644
--- a/Projects/LearnMate/Sources/Coordinator/TabBarCoordinator.swift
+++ b/Projects/LearnMate/Sources/Coordinator/TabBarCoordinator.swift
@@ -9,6 +9,7 @@ import CommonUI
 import Login
 import Home
 import UIKit
+import Chat
 
 protocol TabBarCoordinator: Coordinator {
     var tabBarController: UITabBarController { get }
@@ -91,9 +92,11 @@ final class DefaultTabBarController: TabBarCoordinator {
     private func startTabCoordinator(of page: TabBarPage, to tabNavigationController: UINavigationController) {
         switch page {
         case .home:
-            // 추후 homeCoordinator 로 변경
             let homeViewController = dependency.injector.resolve(HomeViewController.self)
             tabNavigationController.pushViewController(homeViewController, animated: true)
+        case .chat:
+            let chatViewController = dependency.injector.resolve(ChatViewController.self)
+            tabNavigationController.pushViewController(chatViewController, animated: true)
         default:
             let viewController = UIViewController()
             viewController.view.backgroundColor = .black
diff --git a/Projects/LearnMate/Sources/DI/ChatAssembly.swift b/Projects/LearnMate/Sources/DI/ChatAssembly.swift
index 302a350..6459851 100644
--- a/Projects/LearnMate/Sources/DI/ChatAssembly.swift
+++ b/Projects/LearnMate/Sources/DI/ChatAssembly.swift
@@ -5,3 +5,22 @@
 //  Created by 박지윤 on 7/2/25.
 //
 
+import Swinject
+import Chat
+import Domain
+
+public struct ChatAssembly: Assembly {
+    public func assemble(container: Container) {
+        container.register(ChatViewModel.self) { resolver in
+            let chatUseCase = resolver.resolve(ChatUseCase.self)!
+            let tokenUseCase = resolver.resolve(TokenUseCase.self)!
+            return ChatViewModel(chatUseCase: chatUseCase,
+                                 tokenUseCase: tokenUseCase)
+        }
+
+        container.register(ChatViewController.self) { resolver in
+            let chatViewModel = resolver.resolve(ChatViewModel.self)!
+            return ChatViewController(chatViewModel: chatViewModel)
+        }
+    }
+}
diff --git a/Projects/LearnMate/Sources/DI/DataAssembly.swift b/Projects/LearnMate/Sources/DI/DataAssembly.swift
index 2e969cf..ace87bc 100644
--- a/Projects/LearnMate/Sources/DI/DataAssembly.swift
+++ b/Projects/LearnMate/Sources/DI/DataAssembly.swift
@@ -32,5 +32,10 @@ public struct DataAssembly: Assembly {
         container.register(SignRepository.self) { _  in
             return DefaultSignRepository()
         }
+
+        container.register(ChatRepository.self) { resolver in
+            let tokenRepository = resolver.resolve(TokenRepository.self)!
+            return DefaultChatRepository(tokenRepository: tokenRepository)
+        }
     }
 }
diff --git a/Projects/LearnMate/Sources/DI/DomainAssembly.swift b/Projects/LearnMate/Sources/DI/DomainAssembly.swift
index 6fdb825..38f4ffa 100644
--- a/Projects/LearnMate/Sources/DI/DomainAssembly.swift
+++ b/Projects/LearnMate/Sources/DI/DomainAssembly.swift
@@ -34,5 +34,10 @@ public struct DomainAssembly: Assembly {
             let repository = resolver.resolve(SignRepository.self)!
             return DefaultSignUseCase(repository: repository)
         }
+
+        container.register(ChatUseCase.self) { resolver in
+            let repository = resolver.resolve(ChatRepository.self)!
+            return DefaultChatUseCase(repository: repository)
+        }
     }
 }