diff --git a/Helper/GptHelper.php b/Helper/GptHelper.php
new file mode 100644
index 0000000..30a9da3
--- /dev/null
+++ b/Helper/GptHelper.php
@@ -0,0 +1,115 @@
+<?php
+
+namespace Build\Helper;
+
+use phpOMS\Message\Http\HttpRequest;
+use phpOMS\Message\Http\Rest;
+use phpOMS\Uri\HttpUri;
+
+class GptHelper
+{
+    private const ENDPOINT   = 'https://api.openai.com/v1/chat/completions';
+    private const APIKEY     = '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';
+    private const MODEL      = 'gpt-3.5-turbo';
+    private const TEMPERATUR = 0.9;
+    private const MAX_TOKENS = 3096;
+    private const MAX_STRLEN = 1500;
+
+    private const LIMIT_REQUEST_PER_MINUTE = 3;
+    private const LIMIT_TOKENS_PER_MINUTE  = 40000;
+
+    private static $lastRun = 0;
+
+    public static function defaultFileReader($in, $filename)
+    {
+        return \fgets($in);
+    }
+
+    public static function aiRequest(string $behavior, string $content) : string
+    {
+        if (\trim($content) === '') {
+            return '';
+        }
+
+        $requestBody = [
+            'model' => self::MODEL,
+            'max_tokens' => self::MAX_TOKENS,
+            'temperature' => self::TEMPERATUR,
+            'messages' => [
+                [
+                    'role' => 'system',
+                    'content' => $behavior,
+                ],
+                [
+                    'role' => 'user',
+                    'content' => $content,
+                ]
+            ]
+        ];
+
+        $request = new HttpRequest(new HttpUri(self::ENDPOINT));
+        $request->header->set('Authorization', 'Bearer ' . self::APIKEY);
+        $request->header->set('Content-Type', 'application/json');
+        $request->setMethod('POST');
+        $request->fromData($requestBody);
+
+        $time = \time();
+        if ($time - self::$lastRun < 61 / self::LIMIT_REQUEST_PER_MINUTE) {
+            \sleep(61 / self::LIMIT_REQUEST_PER_MINUTE - ($time - self::$lastRun));
+        }
+
+        $response = Rest::request($request);
+        self::$lastRun = \time();
+
+        return $response->getBody();
+    }
+
+    public static function handleFile(string $inPath, string $outPath, string $behavior, \Closure $fileReader) : string
+    {
+        $response = '';
+
+        $in    = \fopen($inPath, 'r');
+        $out   = \fopen($outPath . ($inPath === $outPath ? '.out' : ''), 'w');
+        $lines = '';
+
+        while (($line = $fileReader($in, $inPath)) !== false) {
+            if (\strlen($lines) > self::MAX_STRLEN) {
+                $response = self::aiRequest($behavior, $lines);
+
+                if ($response === '') {
+                    continue;
+                }
+
+                $json = \json_decode($response, true);
+                \fwrite($out, \str_replace("\n\n", "\n", $json[5][0]['message']['content']));
+
+                $lines = '';
+            }
+
+            $lines .= $line . "\n";
+        }
+
+        if (\trim($lines) !== '') {
+            $response = self::aiRequest($behavior, $lines);
+
+            if ($response !== '') {
+                $json = \json_decode($response, true);
+                \fwrite($out, \str_replace("\n\n", "\n", $json[5][0]['message']['content']));
+            }
+        }
+
+        \fwrite($out, "\n");
+
+        \fclose($in);
+
+        if ($outPath === 'php://memory') {
+            \rewind($out);
+            $response = \stream_get_contents($out);
+            \fclose($out);
+        }
+
+        \fclose($out);
+
+        return $response;
+    }
+}
diff --git a/Helper/autoGpt.php b/Helper/autoGpt.php
new file mode 100644
index 0000000..198b453
--- /dev/null
+++ b/Helper/autoGpt.php
@@ -0,0 +1,243 @@
+<?php
+
+use Build\Helper\GptHelper;
+
+include __DIR__ . '/../../phpOMS/Autoloader.php';
+
+// fix docblocks
+$globs = [
+    __DIR__ . '/../../phpOMS/*.php',
+    __DIR__ . '/../../Modules/*/Models/*.php',
+    __DIR__ . '/../../Modules/*/Controller/*.php',
+];
+
+$behaviour = <<<BEHAVIOUR
+Create missing php docblocks with a similar format for member variables:
+/**
+* Default delivery address.
+*
+* @var Address|null
+* @since 1.0.0
+*/
+and for functions:
+/**
+* Order contact elements
+*
+* @param ContactElement \$ele        Element
+* @param bool           \$isRequired Is required
+*
+* @return int
+*
+* @since 1.0.0
+*/
+BEHAVIOUR;
+
+$fileReader = function ($in, $filename)
+{
+    $lines        = '';
+    $scopeStart   = false;
+    $scopeCounter = 0;
+
+    while (($line = \fgets($in)) !== false && ($line !== '' || $scopeCounter > 0)) {
+        if (\stripos($line, ' function ') !== false) {
+            $scopeStart = true;
+        }
+
+        if ($scopeStart) {
+            $scopeCounter += \substr_count($line, '{');
+            $scopeCounter -= \substr_count($line, '}');
+
+            if ($scopeCounter === 0) {
+                $scopeStart = false;
+            }
+        }
+
+        $lines .= $line;
+    }
+
+    return $lines;
+};
+
+foreach ($globs as $glob) {
+    $files = \glob($glob);
+
+    foreach ($files as $file) {
+        if (\stripos($file, 'Test.php')) {
+            continue;
+        }
+
+        GptHelper::handleFile($file, $file, $behaviour, $fileReader);
+    }
+}
+
+// implement test
+$globs = [
+    __DIR__ . '/../../phpOMS/*.php',
+    __DIR__ . '/../../Modules/*/Models/*.php',
+];
+
+$behaviour = <<<BEHAVIOUR
+Implement a php unit test for the given function.
+BEHAVIOUR;
+
+$fileReader = function ($in, $filename)
+{
+    $lines        = '';
+    $scopeStart   = false;
+    $scopeCounter = 0;
+
+    while (($line = \fgets($in)) !== false && ($line !== '' || $scopeCounter > 0)) {
+        if (\stripos($line, 'public function ') !== false || \stripos($line, 'public static function ') !== false) {
+            // Check if a test exists for this function
+            $testFile = \str_replace('.php', 'Test.php', $filename);
+            $testFile = \str_replace('/phpOMS/', '/phpOMS/tests/', $filename);
+
+            if (\stripos($testFile, '../Modules/') !== false) {
+                $subdirectory = "tests/";
+
+                $position = strrpos($testFile, "/../");
+
+                if ($position !== false) {
+                    $position = \stripos($testFile, '/', $position + 4) + 1;
+                    $position = \stripos($testFile, '/', $position) + 1;
+                    $testFile = \substr_replace($testFile, $subdirectory, $position, 0);
+                }
+            }
+
+            if (\file_exists($testFile)) {
+                $scopeStart = true;
+
+                $testContent = \file_get_contents($testFile);
+
+                // Parse functio name
+                $pattern = '/\bfunction\b\s+(\w+)\s*\(/';
+                \preg_match($pattern, $line, $matches);
+
+                if (\stripos($testContent, $matches[1] ?? '~~~') !== false) {
+                    // Test already exists
+                    $scopeStart = false;
+                }
+            }
+
+            $scopeStart = true;
+        }
+
+        // Not in a function / not relevant
+        if (!$scopeStart) {
+            continue;
+        }
+
+        if ($scopeStart) {
+            $scopeCounter += \substr_count($line, '{');
+            $scopeCounter -= \substr_count($line, '}');
+
+            if ($scopeCounter === 0) {
+                $scopeStart = false;
+            }
+        }
+
+        $lines .= $line;
+    }
+
+    return $lines;
+};
+
+foreach ($globs as $glob) {
+    $files = \glob($glob);
+
+    foreach ($files as $file) {
+        if (\stripos($file, 'Test.php')) {
+            continue;
+        }
+
+        $response = GptHelper::handleFile($file, 'php://memory', $behaviour, $fileReader);
+        echo $response , \PHP_EOL , \PHP_EOL;
+    }
+}
+
+// complete and improve test
+$globs = [
+    __DIR__ . '/../../phpOMS/*.php',
+    __DIR__ . '/../../Modules/*/Models/*.php',
+];
+
+$behaviour = <<<BEHAVIOUR
+Improve the given php unit test for the given function.
+BEHAVIOUR;
+
+$fileReader = function ($in, $filename)
+{
+    $lines        = '';
+    $scopeStart   = false;
+    $scopeCounter = 0;
+
+    while (($line = \fgets($in)) !== false && ($line !== '' || $scopeCounter > 0)) {
+        if (\stripos($line, 'public function ') !== false || \stripos($line, 'public static function ') !== false) {
+            // Check if a test exists for this function
+            $testFile = \str_replace('.php', 'Test.php', $filename);
+            $testFile = \str_replace('/phpOMS/', '/phpOMS/tests/', $filename);
+
+            if (\stripos($testFile, '../Modules/') !== false) {
+                $subdirectory = "tests/";
+
+                $position = strrpos($testFile, "/../");
+
+                if ($position !== false) {
+                    $position = \stripos($testFile, '/', $position + 4) + 1;
+                    $position = \stripos($testFile, '/', $position) + 1;
+                    $testFile = \substr_replace($testFile, $subdirectory, $position, 0);
+                }
+            }
+
+            if (\file_exists($testFile)) {
+                $scopeStart = true;
+
+                $testContent = \file_get_contents($testFile);
+
+                // Parse functio name
+                $pattern = '/\bfunction\b\s+(\w+)\s*\(/';
+                \preg_match($pattern, $line, $matches);
+
+                if (\stripos($testContent, $matches[1] ?? '~~~') !== false) {
+                    // Test already exists
+                    $scopeStart = false;
+                }
+
+                $scopeStart = true;
+            } else {
+                $scopeStart = false;
+            }
+        }
+
+        // Not in a function / not relevant
+        if (!$scopeStart) {
+            continue;
+        }
+
+        if ($scopeStart) {
+            $scopeCounter += \substr_count($line, '{');
+            $scopeCounter -= \substr_count($line, '}');
+
+            if ($scopeCounter === 0) {
+                $scopeStart = false;
+            }
+        }
+
+        $lines .= $line;
+    }
+
+    return $lines;
+};
+
+foreach ($globs as $glob) {
+    $files = \glob($glob);
+
+    foreach ($files as $file) {
+        if (\stripos($file, 'Test.php')) {
+            continue;
+        }
+
+        $response = GptHelper::handleFile($file, 'php://memory', $behaviour, $fileReader);
+        echo $response , \PHP_EOL , \PHP_EOL;
+    }
+}
\ No newline at end of file