diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..c32552e4a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+# Project files
+vendor
+composer.lock
diff --git a/README.md b/README.md
index e16b2a49b..3597d55c7 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,21 @@
-# PHP_2023
+# Процессор строк
 
-https://otus.ru/lessons/razrabotchik-php/?utm_source=github&utm_medium=free&utm_campaign=otus
+Краткое описание пакета.
+
+## Требования
+
+- PHP 7.4
+
+## Установка
+
+```bash
+$ composer require dmitrykirillov/otus-composer-package
+```
+
+## Использование
+
+```php
+<?php
+$processor = new StringProcessor();
+echo $processor->getLength('my string'); // 9  
+```
diff --git a/composer.json b/composer.json
new file mode 100644
index 000000000..097b192a7
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,10 @@
+{
+    "name": "pankratov/hw3",
+    "type": "library",
+    "autoload": {
+        "psr-4": {
+            "Pankratov\\Hw3\\": "src/"
+        }
+    },
+    "require": {}
+}
diff --git a/src/StringProcessor.php b/src/StringProcessor.php
new file mode 100644
index 000000000..d94a0739a
--- /dev/null
+++ b/src/StringProcessor.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pankratov\Hw3;
+
+class StringProcessor
+{
+    public function getLength(string $s): int
+    {
+        return strlen($s);
+    }
+}