diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..b72adceb
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, second-branch ]
+  pull_request:
+    branches: [ main, second-branch ]
+
+jobs:
+  lint:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12.3"
+
+      - name: Cache pip
+        uses: actions/cache@v3
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-ruff-v1
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install ruff
+
+      - name: Auto-fix code with Ruff
+        run: |
+          ruff check . --fix --line-length 88 || true
+
+      - name: Run Ruff linter
+        run: |
+          ruff check . --line-length 88
diff --git a/.ruff.toml b/.ruff.toml
new file mode 100644
index 00000000..aa31313b
--- /dev/null
+++ b/.ruff.toml
@@ -0,0 +1,10 @@
+line-length = 88
+select = ["E", "F"]
+ignore = ["F401", "W391", "E501"]
+exclude = [
+    "venv",
+    "migrations",
+    ".git",
+    "__pycache__",
+    "node_modules"
+]
diff --git a/git/src/main.py b/git/src/main.py
index 1822c7e9..704ed1cf 100644
--- a/git/src/main.py
+++ b/git/src/main.py
@@ -102,6 +102,7 @@ def main():
             title_to_remove = input("Введите название книги, которую хотите удалить: ").strip()
 
             new_books = remove_book(books, title_to_remove)
+
             if len(new_books) < len(books):
                 books = new_books
                 save_books(books)
diff --git a/simple_backend/src/task_tracker/BaseHTTPClient.py b/simple_backend/src/task_tracker/BaseHTTPClient.py
new file mode 100644
index 00000000..d5f328e2
--- /dev/null
+++ b/simple_backend/src/task_tracker/BaseHTTPClient.py
@@ -0,0 +1,34 @@
+import requests
+from abc import ABC, abstractmethod
+
+class BaseHTTPClient(ABC):
+
+    def __init__(self, base_url: str, headers: dict = None):
+        self.base_url = base_url.rstrip("/")
+        self.headers = headers or {}
+
+    def _get(self, endpoint: str = "", **kwargs):
+        url = f"{self.base_url}{endpoint}"
+        print(f"[GET] {url}")
+        resp = requests.get(url, headers=self.headers, timeout=15, **kwargs)
+        resp.raise_for_status()
+        return resp.json()
+
+    def _post(self, endpoint: str = "", json_data=None, **kwargs):
+        url = f"{self.base_url}{endpoint}"
+        print(f"[POST] {url} | DATA: {json_data}")
+        resp = requests.post(url, headers=self.headers, json=json_data, timeout=15, **kwargs)
+        resp.raise_for_status()
+        return resp.json()
+
+    def _patch(self, endpoint: str = "", json_data=None, **kwargs):
+        url = f"{self.base_url}{endpoint}"
+        print(f"[PATCH] {url} | DATA: {json_data}")
+        resp = requests.patch(url, headers=self.headers, json=json_data, timeout=15, **kwargs)
+        resp.raise_for_status()
+        return resp.json()
+
+    @abstractmethod
+    def _make_request(self, *args, **kwargs):
+        pass
+        
\ No newline at end of file
diff --git a/simple_backend/src/task_tracker/Cloudflare.py b/simple_backend/src/task_tracker/Cloudflare.py
new file mode 100644
index 00000000..5bea74e0
--- /dev/null
+++ b/simple_backend/src/task_tracker/Cloudflare.py
@@ -0,0 +1,30 @@
+import os
+import requests
+from dotenv import load_dotenv
+from BaseHTTPClient import BaseHTTPClient
+load_dotenv()
+class Cloudflare(BaseHTTPClient):
+    def __init__(self, api_key: str = None, acc_id: str = None):
+        self.api_key = api_key or os.getenv("CLOUDFLARE_API_KEY")
+        self.acc_id = acc_id or os.getenv("CLOUDFLARE_ACCOUNT_ID")
+        base_url = f"https://api.cloudflare.com/client/v4/accounts/{self.acc_id}/ai/run/@cf/meta/llama-3-8b-instruct"
+        headers = {
+            "Authorization": f"Bearer {self.api_key}",
+            "Content-Type": "application/json"
+        }
+        super().__init__(base_url=base_url, headers=headers)
+    def _make_request(self, text: str):
+        payload = {
+            "messages": [
+                {"role": "system", "content": "You are a helpful assistant that explains tasks clearly."},
+                {"role": "user", "content": text}
+            ]
+        }
+        return self._post(json_data=payload)
+    def get_llm_response(self, text:str) -> str:
+        try:
+            data = self._make_request(text)
+            return data.get('result', {}).get('response', "No response")
+        except Exception as e:
+            print("Error getting LLM response:", e)
+            return "Error: wrong API answer"
\ No newline at end of file
diff --git a/simple_backend/src/task_tracker/README.md b/simple_backend/src/task_tracker/README.md
new file mode 100644
index 00000000..765f273c
--- /dev/null
+++ b/simple_backend/src/task_tracker/README.md
@@ -0,0 +1,26 @@
+Хранение состояния
+
++ 1.Минусы метода хранения в оперативной памяти в том, что доступ к данным есть только во время одной сессии , 
+  после перезагрузки приложения, доступа к данным уже не будет.
++ 2.Отсутствие масштабируемости.
++ 3.Нет истории изменений
+-----------------------------------------------------------------------------------------------------------------------------
+Переход на json
+
++ 1.После того, как список оперативной памяти изменился на файл проекта, мы получаем доступ к данным хранилища даже после перезапуска приложения, данные не исчезают, а остаются в списке
++ 2.Можно открыть файл и редактировать его вручную
++ 3.Так как json файл является локальным, то при создании копий приложения, у них будут разные файлы tasks.json
+-----------------------------------------------------------------------------------------------------------------------------
+Хранилища задач
+
+Задачи можно хранить в облачных хранилищах:
+
++ Плюсы: Доступ откуда угодно
++ Минусы: Обдачные хранилища зависимы от сторонних ресурсов
+Задачи можно хранить в баазах данныхЖ
+
++ Плюсы: Поддержка транзакций, масштабирование и надежность
++ Минусы: Сложная настройка
+-----------------------------------------------------------------------------------------------------------------------------
+Состояние гонки, это когда два разработчика делают одно и то же в коде и возникает конфликт(данные одного разработчика перезаписывают данные другого.
+Если перенести хранение на базу данных , то решится проблема с гонками, плюс данные лучше защищены и легче масштабировать
diff --git a/simple_backend/src/task_tracker/main.py b/simple_backend/src/task_tracker/main.py
index 3db98d0d..cd272e3f 100644
--- a/simple_backend/src/task_tracker/main.py
+++ b/simple_backend/src/task_tracker/main.py
@@ -1,19 +1,42 @@
-from fastapi import FastAPI
-
+'''backend'''
+from fastapi import FastAPI, HTTPException
+from storage_gist import GistStorage
+from Cloudflare import Cloudflare
 app = FastAPI()
-
+storage = GistStorage()
+llm = Cloudflare()
+# return tasks list
 @app.get("/tasks")
 def get_tasks():
-    pass
-
+    return storage.load()
+#create a new task with id, name, and status 
 @app.post("/tasks")
-def create_task(task):
-    pass
-
+def create_task(name: str, condition: str = 'new'):
+    tasks = storage.load()
+    new_id = len(tasks) + 1
+    llm_response = llm.get_llm_response(name)
+    task = {'id': new_id, 'name': name, 'condition': condition, 'description': f'LLM Suggestion: {llm_response}'}
+    tasks.append(task)
+    storage.save(tasks)
+    return task
+#update task    
 @app.put("/tasks/{task_id}")
-def update_task(task_id: int):
-    pass
-
+def update_task(task_id: int, name: str, condition: str):
+    tasks = storage.load()
+    for task in tasks:
+        if task['id'] == task_id:
+            task['name'] = name
+            task['condition'] = condition
+            storage.save(tasks)
+            return task
+    raise HTTPException(status_code = 404, detail = 'task not found')
+#delete task
 @app.delete("/tasks/{task_id}")
 def delete_task(task_id: int):
-    pass
+    tasks = storage.load()
+    for task in tasks:
+        if task['id'] == task_id:
+            tasks.remove(task)
+            storage.save(tasks)
+            return 'task deleted'
+    raise HTTPException(status_code = 404, detail = 'task not found') 
\ No newline at end of file
diff --git a/simple_backend/src/task_tracker/storage.py b/simple_backend/src/task_tracker/storage.py
new file mode 100644
index 00000000..ce237692
--- /dev/null
+++ b/simple_backend/src/task_tracker/storage.py
@@ -0,0 +1,13 @@
+import json
+import os
+class TaskStorage:
+    def __init__(self, filename: str = 'tasks.json'):
+        self.file = filename
+        if not os.path.exists(self.file):  # if file does not exist, create file with empty list
+            self.save([])
+    def load(self):
+        with open(self.file, 'r', encoding = 'utf-8') as f:
+            return json.load(f)
+    def save(self, tasks):
+        with open(self.file, 'w', encoding = 'utf-8') as f:
+            json.dump(tasks, f)
\ No newline at end of file
diff --git a/simple_backend/src/task_tracker/storage_gist.py b/simple_backend/src/task_tracker/storage_gist.py
new file mode 100644
index 00000000..34c9972a
--- /dev/null
+++ b/simple_backend/src/task_tracker/storage_gist.py
@@ -0,0 +1,44 @@
+import os
+import requests
+import json
+from dotenv import load_dotenv
+from BaseHTTPClient import BaseHTTPClient
+load_dotenv()  
+GITHUB_API = 'https://api.github.com'
+class GistStorage(BaseHTTPClient):
+    def __init__(self, token: str = None, gist_id: str = None, filename: str = 'tasks.json'):
+        self.token: str = token or os.getenv('GITHUB_TOKEN')
+        self.gist_id: str = gist_id or os.getenv('GIST_ID')
+        self.filename: str = filename
+        base_url = f"{GITHUB_API}/gists/{self.gist_id}"
+        if not self.token or not self.gist_id:
+            raise RuntimeError('GITHUB_TOKEN and GIST_ID must be given')
+        headers: dict = {
+            'Authorization': f'token {self.token}',
+            'Accept': 'application/vnd.github+json'
+        }
+        super().__init__(base_url=base_url, headers=headers)
+    def _make_request(self, *args, **kwargs):
+        pass
+    # loading task list from gist
+    def load(self) -> list[dict]:
+        gist_data = self._get()
+        files = gist_data.get("files", {})
+        if self.filename not in files:
+            return []
+        try:
+            content = files[self.filename]["content"]
+            data = json.loads(content)
+            return data.get("tasks", [])
+        except json.JSONDecodeError:
+            return []
+    # saving task list on gist    
+    def save(self, tasks: list[dict]) -> None:
+        body: dict = {
+            'files': {
+                self.filename: {
+                    'content': json.dumps({'tasks': tasks})
+                }
+            }
+        }
+        self._patch(json_data=body)
\ No newline at end of file
diff --git a/simple_backend/src/task_tracker/tasks.json b/simple_backend/src/task_tracker/tasks.json
new file mode 100644
index 00000000..80c933c8
--- /dev/null
+++ b/simple_backend/src/task_tracker/tasks.json
@@ -0,0 +1 @@
+[{"id": 1, "name": "finaltask", "condition": "updated"}, {"id": 2, "name": "totaltask", "condition": "updated"}, {"id": 3, "name": "Task3", "condition": "new"}]
\ No newline at end of file