Update README.md

README.md

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-# task-69fb9a45c2159e8a8e103c14
+# Hello World Project
 
-Основы синтаксиса и типы данных – напишите программу, которая выводит "Hello World"
+This repository contains a minimal Python script that prints **Hello World** and an agent example using LangChain.
+
+## Files
+- `main.py`: Prints "Hello World" when executed.
+- `agent.py`: Demonstrates how to create a simple LangChain agent with a tool that returns the greeting.
+- `requirements.txt`: Lists required dependencies.
+
+## Running
+```bash
+python main.py
+```