diff --git a/CLAUDE.md b/CLAUDE.md
index ddb781e..de1132c 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -15,10 +15,14 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ```bash
 # Tests
-./vendor/bin/phpunit                          # All tests
-./vendor/bin/phpunit --testsuite=Unit         # Unit only
-./vendor/bin/phpunit --testsuite=Feature      # Feature only
-./vendor/bin/phpunit --filter="test name"     # Single test
+composer test                                 # All tests
+composer test -- --testsuite=Unit             # Unit only
+composer test -- --testsuite=Feature          # Feature only
+composer test -- --filter="test name"         # Single test
+
+# Code style (PSR-12 via Laravel Pint)
+composer lint                                 # Fix code style
+./vendor/bin/pint --dirty                     # Format changed files only
 
 # Frontend
 npm run dev      # Vite dev server
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 452e6b6..8325058 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace App\Providers;
 
 use Illuminate\Support\ServiceProvider;
diff --git a/bootstrap/app.php b/bootstrap/app.php
index ac5419a..4a91396 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Illuminate\Foundation\Application;
 use Illuminate\Foundation\Configuration\Exceptions;
 use Illuminate\Foundation\Configuration\Middleware;
diff --git a/bootstrap/providers.php b/bootstrap/providers.php
index 38b258d..84c7d4d 100644
--- a/bootstrap/providers.php
+++ b/bootstrap/providers.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 return [
     App\Providers\AppServiceProvider::class,
 ];
diff --git a/composer.json b/composer.json
index 29512fd..a7a8b96 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
         "core/php-admin": "@dev"
     },
     "require-dev": {
+        "laravel/pint": "^1.0",
         "phpunit/phpunit": "^11.5"
     },
     "autoload": {
@@ -30,6 +31,10 @@
             "Tests\\": "tests/"
         }
     },
+    "scripts": {
+        "test": "phpunit",
+        "lint": "pint"
+    },
     "extra": {
         "laravel": {
             "providers": [
diff --git a/config/core.php b/config/core.php
index 06502fa..9ba817d 100644
--- a/config/core.php
+++ b/config/core.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 return [
     /*
     |--------------------------------------------------------------------------
diff --git a/database/seeders/DatabaseSeeder.php b/database/seeders/DatabaseSeeder.php
index df6818f..8409bbc 100644
--- a/database/seeders/DatabaseSeeder.php
+++ b/database/seeders/DatabaseSeeder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Database\Seeders;
 
 use Illuminate\Database\Seeder;
diff --git a/pint.json b/pint.json
new file mode 100644
index 0000000..4b4f940
--- /dev/null
+++ b/pint.json
@@ -0,0 +1,6 @@
+{
+    "preset": "laravel",
+    "rules": {
+        "declare_strict_types": true
+    }
+}
diff --git a/public/index.php b/public/index.php
index 947d989..d55a3b2 100644
--- a/public/index.php
+++ b/public/index.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Illuminate\Http\Request;
 
 define('LARAVEL_START', microtime(true));
diff --git a/routes/api.php b/routes/api.php
index 15fbf70..31a9b77 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Illuminate\Support\Facades\Route;
 
 // API routes are registered via Core modules
diff --git a/routes/console.php b/routes/console.php
index d6f3c8b..ca1bbfa 100644
--- a/routes/console.php
+++ b/routes/console.php
@@ -1,3 +1,5 @@
 <?php
 
+declare(strict_types=1);
+
 // Console commands are registered via Core modules
diff --git a/routes/web.php b/routes/web.php
index 86a06c5..7bceeaf 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Illuminate\Support\Facades\Route;
 
 Route::get('/', function () {
diff --git a/src/Routes/admin.php b/src/Routes/admin.php
index 621f1bc..10eee1e 100644
--- a/src/Routes/admin.php
+++ b/src/Routes/admin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Illuminate\Support\Facades\Route;
 
 /*
diff --git a/src/Tests/UseCase/DevToolsBasic.php b/src/Tests/UseCase/DevToolsBasic.php
index d0425d1..ce37181 100644
--- a/src/Tests/UseCase/DevToolsBasic.php
+++ b/src/Tests/UseCase/DevToolsBasic.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * UseCase: Developer Tools (Basic Flow)
  *
diff --git a/tests/TestCase.php b/tests/TestCase.php
index fe1ffc2..6ac0072 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Tests;
 
 use Illuminate\Foundation\Testing\TestCase as BaseTestCase;