diff --git a/.github/workflows/format-code.yml b/.github/workflows/format-code.yml
index 4e34b1f..cf9cb26 100644
--- a/.github/workflows/format-code.yml
+++ b/.github/workflows/format-code.yml
@@ -14,6 +14,9 @@ jobs:
       contents: write
     steps:
     - uses: actions/checkout@v4
+      with:
+        ref: ${{ github.event.pull_request.head.ref }}
+        fetch-depth: 0
 
     - name: Validate composer.json and composer.lock
       run: composer validate
@@ -32,15 +35,19 @@ jobs:
 
     - name: format code
       run: bash commands php-cs-fixer
-    - name: Commit and Push changes
+    - name: Commit and push changelog to PR branch
+      env:
+        GIT_AUTHOR_NAME: github-actions
+        GIT_AUTHOR_EMAIL: actions@github.com
       run: |
-        if [ -z "$(git status --porcelain)" ]; then
+        git config user.name "$GIT_AUTHOR_NAME"
+        git config user.email "$GIT_AUTHOR_EMAIL"
+        git add .
+        if git diff --staged --quiet; then
           echo "No changes to commit."
-        else
-          echo "Found changes, committing..."
-          git config --global user.name "GitHub Actions Bot"
-          git config --global user.email "github-actions-bot@users.noreply.github.com"
-          git add .
-          git commit -m "style: Fix PHP code style issues"
-          git push
-        fi
\ No newline at end of file
+          exit 0
+        fi
+        commit_msg="style: Fix PHP code style issues"
+        git commit -m "$commit_msg"
+        git push origin HEAD:${{ github.event.pull_request.head.ref }}
+        
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 13a2bfc..7ab71cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,3 +14,7 @@
 - [2025-12-22] DamImpr: Add tests directory to export-ignore in .gitattributes [#30](https://github.com/DamImpr/cache-multi-layer/pull/30) 
 
 - [2026-01-05] DamImpr: add persistent connection redis [#31](https://github.com/DamImpr/cache-multi-layer/pull/31) 
+
+- [2026-01-09] DamImpr: Redis and memcache cache, instance passed in construction [#32](https://github.com/DamImpr/cache-multi-layer/pull/32) 
+
+- [2026-01-09] DamImpr: Instance configuration [#33](https://github.com/DamImpr/cache-multi-layer/pull/33) 
diff --git a/composer.lock b/composer.lock
index 3c00181..7622f29 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8310aaaf271b37ba5c613ac8d3130f08",
+    "content-hash": "05124d3fe3285b80707ceb8bdc9ab05b",
     "packages": [
         {
             "name": "predis/predis",
diff --git a/src/Service/MemcacheCache.php b/src/Service/MemcacheCache.php
index 4dbee59..e14b9b7 100644
--- a/src/Service/MemcacheCache.php
+++ b/src/Service/MemcacheCache.php
@@ -3,7 +3,9 @@
 namespace CacheMultiLayer\Service;
 
 use CacheMultiLayer\Enum\CacheEnum;
+use CacheMultiLayer\Exception\CacheMissingConfigurationException;
 use CacheMultiLayer\Interface\Cacheable;
+use Exception;
 use Memcache;
 use Override;
 
@@ -165,25 +167,35 @@ public function set(string $key, int|float|string|Cacheable|array $val, ?int $tt
     protected function __construct(int $ttl, array $configuration = [])
     {
         parent::__construct($ttl, $configuration);
-        $this->memcache = new Memcache();
-        $port = $configuration['port'] ?? 11211;
-        if (array_key_exists('persistent', $configuration)) {
-            $resultConnection = $this->memcache->pconnect($configuration['server_address'], $port);
+        if (array_key_exists('instance', $configuration)) {
+            $this->memcache = $configuration['instance'];
         } else {
-            $resultConnection = $this->memcache->connect($configuration['server_address'], $port);
+            $this->memcache = new Memcache();
+            $port = $configuration['port'] ?? 11211;
+            if (array_key_exists('persistent', $configuration)) {
+                $resultConnection = $this->memcache->pconnect($configuration['server_address'], $port);
+            } else {
+                $resultConnection = $this->memcache->connect($configuration['server_address'], $port);
+            }
+
+            if (!$resultConnection) {
+                throw new Exception("Connection not found");
+            }
         }
-
-        if (!$resultConnection) {
-            throw new \Exception("Connection not found");
-        }
-
         $this->compress = array_key_exists('compress', $configuration) && $configuration['compress'];
     }
 
+    #[\Override]
+    protected function assertConfig(array $configuration): void
+    {
+        if (!array_key_exists('instance', $configuration) || $configuration['instance'] instanceof Memcache) {
+            parent::assertConfig($configuration);
+        } elseif (array_key_exists('instance', $configuration)) {
+            throw new CacheMissingConfigurationException("instance must be " . Memcache::class . " class");
+        }
+    }
     private readonly Memcache $memcache;
-
     private readonly bool $compress;
-
     private array $mandatoryKeys = [
         'server_address'
     ];
diff --git a/src/Service/RedisCache.php b/src/Service/RedisCache.php
index d54adb5..a31635c 100644
--- a/src/Service/RedisCache.php
+++ b/src/Service/RedisCache.php
@@ -3,6 +3,7 @@
 namespace CacheMultiLayer\Service;
 
 use CacheMultiLayer\Enum\CacheEnum;
+use CacheMultiLayer\Exception\CacheMissingConfigurationException;
 use CacheMultiLayer\Interface\Cacheable;
 use Override;
 use Predis\Client as PredisClient;
@@ -109,14 +110,18 @@ public function getRemainingTTL(string $key): ?int
     protected function __construct(int $ttl, array $configuration = [])
     {
         parent::__construct($ttl, $configuration);
-        $this->predisClient = new PredisClient([
-            'scheme' => $configuration['tcp'] ?? 'tcp',
-            'host' => $configuration['server_address'],
-            'port' => $configuration['port'] ?? 6379,
-            'password' => $configuration['password'] ?? '',
-            'database' => $configuration['database'] ?? 0,
-            'persistent' => $configuration['persistent'] ?? false
-        ]);
+        if (array_key_exists('instance', $configuration)) {
+            $this->predisClient = $configuration['instance'];
+        } else {
+            $this->predisClient = new PredisClient([
+                'scheme' => $configuration['tcp'] ?? 'tcp',
+                'host' => $configuration['server_address'],
+                'port' => $configuration['port'] ?? 6379,
+                'password' => $configuration['password'] ?? '',
+                'database' => $configuration['database'] ?? 0,
+                'persistent' => $configuration['persistent'] ?? false
+            ]);
+        }
     }
 
     /**
@@ -149,8 +154,16 @@ protected function getMandatoryConfig(): array
         return $this->mandatoryKeys;
     }
 
+    #[\Override]
+    protected function assertConfig(array $configuration): void
+    {
+        if (!array_key_exists('instance', $configuration) || $configuration['instance'] instanceof PredisClient) {
+            parent::assertConfig($configuration);
+        } elseif (array_key_exists('instance', $configuration)) {
+            throw new CacheMissingConfigurationException("instance must be " . PredisClient::class . " class");
+        }
+    }
     private readonly PredisClient $predisClient;
-
     private array $mandatoryKeys = [
         'server_address'
     ];
diff --git a/tests/MemcacheCacheTest.php b/tests/MemcacheCacheTest.php
index 48b690c..8864fc5 100644
--- a/tests/MemcacheCacheTest.php
+++ b/tests/MemcacheCacheTest.php
@@ -6,6 +6,7 @@
 use CacheMultiLayer\Exception\CacheMissingConfigurationException;
 use CacheMultiLayer\Service\Cache;
 use Exception;
+use Memcache;
 use Override;
 
 /**
@@ -26,7 +27,7 @@ protected function setUp(): void
     #[Override]
     public static function setUpBeforeClass(): void
     {
-       parent::setUpBeforeClass();
+        parent::setUpBeforeClass();
         set_error_handler(function (int $errno, string $errstr, string $errfile, int $errline): bool {
             // error was suppressed with the @-operator
             if (0 === error_reporting()) {
@@ -101,7 +102,7 @@ public function testIsConnected(): void
     {
         parent::testIsConnected();
     }
-    
+
     #[\Override]
     public function testEmptyDecrement(): void
     {
@@ -132,6 +133,20 @@ public function testConnectionNotFound(): void
         Cache::factory(CacheEnum::MEMCACHE, 60, ['server_address' => 'ip-no-memcache'])->isConnected();
     }
 
+    public function testInstance(): void
+    {
+        $memcache = new Memcache();
+        $memcache->connect('memcache-server', 11211);
+        Cache::factory(CacheEnum::MEMCACHE, 60, ['instance' => $memcache]);
+        $this->assertTrue(true); //no exception throwns
+    }
+
+    public function testMissingInstance(): void
+    {
+        $this->expectException(CacheMissingConfigurationException::class);
+        Cache::factory(CacheEnum::MEMCACHE, 60, ['instance' => 5]);
+    }
+
     public function testEnum(): void
     {
         $this->doTestRealEnum(CacheEnum::MEMCACHE);
@@ -140,7 +155,7 @@ public function testEnum(): void
     #[\Override]
     public static function tearDownAfterClass(): void
     {
-         restore_error_handler();
+        restore_error_handler();
         Cache::factory(CacheEnum::MEMCACHE, 60, ['server_address' => 'memcache-server'])->clearAllCache();
     }
-}
+}
\ No newline at end of file
diff --git a/tests/RedisCacheTest.php b/tests/RedisCacheTest.php
index 342569e..af9d235 100644
--- a/tests/RedisCacheTest.php
+++ b/tests/RedisCacheTest.php
@@ -7,6 +7,7 @@
 use CacheMultiLayer\Service\Cache;
 use Exception;
 use Override;
+use Predis\Client;
 
 /**
  * REDIS unit test class implementation
@@ -139,10 +140,26 @@ public function testConnectionPersistent(): void
         $this->assertTrue(Cache::factory(CacheEnum::REDIS, 60, ['server_address' => 'redis-server', 'persistent' => true])->isConnected());
     }
 
+    public function testInstance(): void
+    {
+        $redis = new Client([
+            'host' => 'redis-server',
+            'port' => 6379
+        ]);
+        Cache::factory(CacheEnum::REDIS, 60, ['instance' => $redis]);
+        $this->assertTrue(true); //no exception throwns
+    }
+
+    public function testMissingInstance(): void
+    {
+        $this->expectException(CacheMissingConfigurationException::class);
+        Cache::factory(CacheEnum::REDIS, 60, ['instance' => 5]);
+    }
+
     #[\Override]
     public static function tearDownAfterClass(): void
     {
         restore_error_handler();
         Cache::factory(CacheEnum::REDIS, 60, ['server_address' => 'redis-server'])->clearAllCache();
     }
-}
+}
\ No newline at end of file