use read-only properties (@see https://php.watch/versions/8.1/readonly)

src/Composer/DefaultStrategy.php

@@ -22,7 +22,7 @@
  */
 final class DefaultStrategy implements ManifestBuildStrategy
 {
-    public function __construct(private ManifestFactory $factory)
+    public function __construct(private readonly ManifestFactory $factory)
     {
     }
 

src/Composer/ManifestFactory.php

@@ -40,10 +40,10 @@ final class ManifestFactory
     private ManifestBuildStrategy $strategy;
 
     public function __construct(
-        private Configuration $config,
-        private bool $isDecorated,
-        private string $boxVersion,
-        private string $boxManifestVersion
+        private readonly Configuration $config,
+        private readonly bool $isDecorated,
+        private readonly string $boxVersion,
+        private readonly string $boxManifestVersion
     ) {
         $this->setStrategy(new DefaultStrategy($this));
     }

src/Composer/ManifestOptions.php

@@ -24,7 +24,7 @@ final class ManifestOptions
     public const TEMPLATE_OPTION = 'template';
     public const RESOURCE_OPTION = 'resource';
 
-    public function __construct(private IO $io)
+    public function __construct(private readonly IO $io)
     {
     }
 

src/Composer/PostInstallStrategy.php

@@ -48,7 +48,7 @@
  */
 final class PostInstallStrategy implements ManifestBuildStrategy
 {
-    public function __construct(private ManifestFactory $factory)
+    public function __construct(private readonly ManifestFactory $factory)
     {
     }