diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
new file mode 100644
index 00000000..3147186a
--- /dev/null
+++ b/.github/workflows/linter.yml
@@ -0,0 +1,39 @@
+name: Check & fix styling
+
+on:
+  push: # (or pull requests)
+    paths:
+      - '.github/workflows/**'
+      - '**.php'
+      - 'app/**'
+      - 'tests/**'
+      - 'phpunit.xml'
+      - 'composer.json'
+      - 'composer.lock'
+      - 'resources/**'
+      - '.prettierrc.json'
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+
+      - name: Setup PHP 🔧
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.3
+          coverage: none
+          tools: composer:v2
+        env:
+          COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install Dependencies 🔧
+        run: composer install -q --no-ansi --no-interaction --no-scripts --no-progress --prefer-dist
+
+      - name: Static Analysis
+        run: vendor/bin/psalm --no-cache
diff --git a/app/Docs.php b/app/Docs.php
index e092f7aa..bfc74a7e 100644
--- a/app/Docs.php
+++ b/app/Docs.php
@@ -361,9 +361,9 @@ public function update()
     /**
      * Разбивает markdown файл на разделы по заголовкам.
      *
-     * @return Массив разделов с заголовками и содержимым
+     * @return Collection<array-key, array> Массив разделов с заголовками и содержимым
      */
-    public function getSections()
+    public function getSections(): Collection
     {
         // Разбиваем HTML содержимое на разделы по заголовкам
         preg_match_all('/<h(\d)>(.+)<\/h\d>(.*)/sU', $this->content(), $matches, PREG_SET_ORDER);
diff --git a/app/Models/IdeaKey.php b/app/Models/IdeaKey.php
index 63d60bfc..7d67b77a 100644
--- a/app/Models/IdeaKey.php
+++ b/app/Models/IdeaKey.php
@@ -6,6 +6,7 @@
 use Illuminate\Database\Eloquent\Concerns\HasUuids;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Orchid\Metrics\Chartable;
 
 class IdeaKey extends Model
@@ -14,8 +15,6 @@ class IdeaKey extends Model
 
     /**
      * Get the idea request associated with the idea key.
-     *
-     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function request(): BelongsTo
     {
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 7a40b8e2..e360cf5d 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -8,6 +8,7 @@
 use App\View\Components\Posts\Youtube;
 use Illuminate\Pagination\Paginator;
 use Illuminate\Support\Facades\Blade;
+use Illuminate\Support\Facades\URL;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -18,7 +19,7 @@ class AppServiceProvider extends ServiceProvider
     public function register(): void
     {
         if ($this->app->environment('production')) {
-            \URL::forceScheme('https');
+            URL::forceScheme('https');
         }
     }
 
diff --git a/app/View/Components/Docs/Content.php b/app/View/Components/Docs/Content.php
index 4d2c63f3..c6d647ac 100644
--- a/app/View/Components/Docs/Content.php
+++ b/app/View/Components/Docs/Content.php
@@ -24,8 +24,6 @@ class Content extends Component implements Htmlable
 
     /**
      * Create a new component instance.
-     *
-     * @return void
      */
     public function __construct(string $content)
     {
@@ -34,12 +32,8 @@ public function __construct(string $content)
 
     /**
      * Get the view / contents that represent the component.
-     *
-     * @throws \DOMException
-     *
-     * @return \App\View\Components\DocsContent
      */
-    public function render()
+    public function render(): self
     {
         return $this;
     }
diff --git a/composer.json b/composer.json
index 37d22e7e..3280724a 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
     "license": "CC BY-NC-SA 4.0",
     "require": {
         "php": "^8.3",
+        "ext-dom": "*",
         "cagilo/cagilo": "^3.2",
         "doctrine/dbal": "^3.7",
         "esplora/spire": "0.0.1",
diff --git a/psalm.xml b/psalm.xml
index 3c48b370..525b1ec7 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <psalm
-    errorLevel="1"
+    errorLevel="7"
     resolveFromConfigFile="true"
     findUnusedBaselineEntry="false"
     findUnusedCode="false"