diff --git a/src/Adapter/Docker/Satellite.php b/src/Adapter/Docker/Satellite.php
index f551d427..9ae97a02 100644
--- a/src/Adapter/Docker/Satellite.php
+++ b/src/Adapter/Docker/Satellite.php
@@ -73,7 +73,7 @@ public function build(
         $command = ['docker', 'build', '--rm', '-', ...iterator_to_array($iterator($this->imageTags))];
 
         $process = new Process(
-            implode (' ', array_map(fn ($part) => escapeshellarg($part), $command)),
+            implode (' ', array_map(fn ($part) => escapeshellarg((string) $part), $command)),
             $this->workdir,
         );
 
diff --git a/src/Runtime/Pipeline/Configuration.php b/src/Runtime/Pipeline/Configuration.php
index a3086eeb..efb317fd 100644
--- a/src/Runtime/Pipeline/Configuration.php
+++ b/src/Runtime/Pipeline/Configuration.php
@@ -49,12 +49,12 @@ public function getStepsTreeBuilder(): TreeBuilder
             ->isRequired()
             ->fixXmlConfig('step')
             ->validate()
-            ->ifTrue(fn ($value) => 1 <= array_reduce(
-                array_keys($this->plugins),
-                fn (int $count, string $plugin) => \array_key_exists($plugin, $value) ? $count + 1 : $count,
-                0
-            ))
-            ->thenInvalid(sprintf('You should only specify one plugin between %s.', implode('", "', array_map(fn (string $plugin) => sprintf('"%s"', $plugin), array_keys($this->plugins)))))
+                ->ifTrue(fn ($value) => 1 <= array_reduce(
+                    array_keys($this->plugins),
+                    fn (int $count, string $plugin) => \array_key_exists($plugin, $value) ? $count + 1 : $count,
+                    0
+                ))
+                ->thenInvalid(sprintf('You should only specify one plugin between %s.', implode('", "', array_map(fn (string $plugin) => sprintf('"%s"', $plugin), array_keys($this->plugins)))))
             ->end()
         ;
 
@@ -80,7 +80,9 @@ public function getConfigTreeBuilder(): TreeBuilder
                     ->scalarPrototype()->end()
                 ->end()
                 ->scalarNode('name')->end()
-                ->scalarNode('code')->end()
+                ->scalarNode('code')
+                    ->isRequired()
+                ->end()
                 ->append($this->getStepsTreeBuilder()->getRootNode())
             ->end()
         ;
@@ -95,7 +97,9 @@ private function applyPlugins(ArrayNodeDefinition $node): self
             $node
                 ->children()
                     ->scalarNode('name')->end()
-                    ->scalarNode('code')->end()
+                    ->scalarNode('code')
+                        ->isRequired()
+                    ->end()
                 ->end()
                 ->append($plugin->getConfigTreeBuilder()->getRootNode())
             ;
@@ -110,7 +114,9 @@ private function applyFeatures(ArrayNodeDefinition $node): self
             /* @phpstan-ignore-next-line */
             $node->children()
                     ->scalarNode('name')->end()
-                    ->scalarNode('code')->end()
+                    ->scalarNode('code')
+                        ->isRequired()
+                    ->end()
                 ->end()
                 ->append($feature->getConfigTreeBuilder()->getRootNode())
             ;
diff --git a/src/Runtime/Workflow/Action/Configuration.php b/src/Runtime/Workflow/Action/Configuration.php
index 0b11a899..4d5602e7 100644
--- a/src/Runtime/Workflow/Action/Configuration.php
+++ b/src/Runtime/Workflow/Action/Configuration.php
@@ -26,7 +26,14 @@ public function getConfigTreeBuilder(): TreeBuilder
         $builder = new TreeBuilder('action');
 
         /** @var ArrayNodeDefinition $node */
-        $node = $builder->getRootNode();
+        $node = $builder->getRootNode()
+            ->children()
+                ->scalarNode('name')->end()
+                ->scalarNode('code')
+                    ->isRequired()
+                ->end()
+            ->end()
+        ;
 
         foreach ($this->actions as $action) {
             $node->append($action->getConfigTreeBuilder()->getRootNode());