diff --git a/composer.json b/composer.json
index e6a384ef1..ee2f8844f 100644
--- a/composer.json
+++ b/composer.json
@@ -32,12 +32,12 @@
         "ergebnis/composer-normalize": "^2.50",
         "friendsofphp/php-cs-fixer": "^3.94",
         "phpstan/extension-installer": "^1.4",
-        "phpstan/phpstan": "^1.12",
-        "phpstan/phpstan-strict-rules": "^1.6",
+        "phpstan/phpstan": "^2.1",
+        "phpstan/phpstan-strict-rules": "^2.0",
         "phpunit/phpunit": "^10.5",
         "symfony/console": "^6.4",
         "symplify/monorepo-builder": "^11.2.0",
-        "symplify/phpstan-rules": "^13.0"
+        "symplify/phpstan-rules": "^14.9"
     },
     "replace": {
         "symfony/polyfill-php80": "*",
diff --git a/composer.lock b/composer.lock
index caa88f7da..9d31b269c 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": "a4c16f301d12c383128e62eacaf5ff33",
+    "content-hash": "a539658a6108a63f5757061bda1439ce",
     "packages": [
         {
             "name": "brotkrueml/twig-codehighlight",
@@ -1487,16 +1487,16 @@
         },
         {
             "name": "nette/utils",
-            "version": "v4.0.8",
+            "version": "v4.0.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nette/utils.git",
-                "reference": "c930ca4e3cf4f17dcfb03037703679d2396d2ede"
+                "reference": "2778deb6aab136c8db4ed1f4d6e9f465ca2dbee3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nette/utils/zipball/c930ca4e3cf4f17dcfb03037703679d2396d2ede",
-                "reference": "c930ca4e3cf4f17dcfb03037703679d2396d2ede",
+                "url": "https://api.github.com/repos/nette/utils/zipball/2778deb6aab136c8db4ed1f4d6e9f465ca2dbee3",
+                "reference": "2778deb6aab136c8db4ed1f4d6e9f465ca2dbee3",
                 "shasum": ""
             },
             "require": {
@@ -1570,9 +1570,9 @@
             ],
             "support": {
                 "issues": "https://github.com/nette/utils/issues",
-                "source": "https://github.com/nette/utils/tree/v4.0.8"
+                "source": "https://github.com/nette/utils/tree/v4.0.10"
             },
-            "time": "2025-08-06T21:43:34+00:00"
+            "time": "2025-12-01T17:30:42+00:00"
         },
         {
             "name": "phpdocumentor/dev-server",
@@ -5335,28 +5335,28 @@
         },
         {
             "name": "webmozart/assert",
-            "version": "1.11.0",
+            "version": "1.12.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozarts/assert.git",
-                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991"
+                "reference": "9be6926d8b485f55b9229203f962b51ed377ba68"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozarts/assert/zipball/11cb2199493b2f8a3b53e7f19068fc6aac760991",
-                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/9be6926d8b485f55b9229203f962b51ed377ba68",
+                "reference": "9be6926d8b485f55b9229203f962b51ed377ba68",
                 "shasum": ""
             },
             "require": {
                 "ext-ctype": "*",
+                "ext-date": "*",
+                "ext-filter": "*",
                 "php": "^7.2 || ^8.0"
             },
-            "conflict": {
-                "phpstan/phpstan": "<0.12.20",
-                "vimeo/psalm": "<4.6.1 || 4.6.2"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^8.5.13"
+            "suggest": {
+                "ext-intl": "",
+                "ext-simplexml": "",
+                "ext-spl": ""
             },
             "type": "library",
             "extra": {
@@ -5387,9 +5387,9 @@
             ],
             "support": {
                 "issues": "https://github.com/webmozarts/assert/issues",
-                "source": "https://github.com/webmozarts/assert/tree/1.11.0"
+                "source": "https://github.com/webmozarts/assert/tree/1.12.1"
             },
-            "time": "2022-06-03T18:03:27+00:00"
+            "time": "2025-10-29T15:56:20+00:00"
         }
     ],
     "packages-dev": [
@@ -6797,20 +6797,15 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.12.23",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "29201e7a743a6ab36f91394eab51889a82631428"
-            },
+            "version": "2.1.39",
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/29201e7a743a6ab36f91394eab51889a82631428",
-                "reference": "29201e7a743a6ab36f91394eab51889a82631428",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/c6f73a2af4cbcd99c931d0fb8f08548cc0fa8224",
+                "reference": "c6f73a2af4cbcd99c931d0fb8f08548cc0fa8224",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2|^8.0"
+                "php": "^7.4|^8.0"
             },
             "conflict": {
                 "phpstan/phpstan-shim": "*"
@@ -6851,32 +6846,31 @@
                     "type": "github"
                 }
             ],
-            "time": "2025-03-23T14:57:32+00:00"
+            "time": "2026-02-11T14:48:56+00:00"
         },
         {
             "name": "phpstan/phpstan-strict-rules",
-            "version": "1.6.2",
+            "version": "2.0.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan-strict-rules.git",
-                "reference": "b564ca479e7e735f750aaac4935af965572a7845"
+                "reference": "1aba28b697c1e3b6bbec8a1725f8b11b6d3e5a5f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan-strict-rules/zipball/b564ca479e7e735f750aaac4935af965572a7845",
-                "reference": "b564ca479e7e735f750aaac4935af965572a7845",
+                "url": "https://api.github.com/repos/phpstan/phpstan-strict-rules/zipball/1aba28b697c1e3b6bbec8a1725f8b11b6d3e5a5f",
+                "reference": "1aba28b697c1e3b6bbec8a1725f8b11b6d3e5a5f",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2 || ^8.0",
-                "phpstan/phpstan": "^1.12.4"
+                "php": "^7.4 || ^8.0",
+                "phpstan/phpstan": "^2.1.39"
             },
             "require-dev": {
-                "nikic/php-parser": "^4.13.0",
                 "php-parallel-lint/php-parallel-lint": "^1.2",
-                "phpstan/phpstan-deprecation-rules": "^1.1",
-                "phpstan/phpstan-phpunit": "^1.0",
-                "phpunit/phpunit": "^9.5"
+                "phpstan/phpstan-deprecation-rules": "^2.0",
+                "phpstan/phpstan-phpunit": "^2.0",
+                "phpunit/phpunit": "^9.6"
             },
             "type": "phpstan-extension",
             "extra": {
@@ -6896,11 +6890,14 @@
                 "MIT"
             ],
             "description": "Extra strict and opinionated rules for PHPStan",
+            "keywords": [
+                "static analysis"
+            ],
             "support": {
                 "issues": "https://github.com/phpstan/phpstan-strict-rules/issues",
-                "source": "https://github.com/phpstan/phpstan-strict-rules/tree/1.6.2"
+                "source": "https://github.com/phpstan/phpstan-strict-rules/tree/2.0.10"
             },
-            "time": "2025-01-19T13:02:24+00:00"
+            "time": "2026-02-11T14:17:32+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -8506,23 +8503,23 @@
         },
         {
             "name": "symplify/phpstan-rules",
-            "version": "13.0.1",
+            "version": "14.9.11",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symplify/phpstan-rules.git",
-                "reference": "c117396f4d7fe30704233c033244114e0fbea3f0"
+                "reference": "5ea4bbd9357cba253aada506dd96d37d7069ac3b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symplify/phpstan-rules/zipball/c117396f4d7fe30704233c033244114e0fbea3f0",
-                "reference": "c117396f4d7fe30704233c033244114e0fbea3f0",
+                "url": "https://api.github.com/repos/symplify/phpstan-rules/zipball/5ea4bbd9357cba253aada506dd96d37d7069ac3b",
+                "reference": "5ea4bbd9357cba253aada506dd96d37d7069ac3b",
                 "shasum": ""
             },
             "require": {
-                "nette/utils": "^3.2.9 || ^4.0",
-                "php": "^7.2|^8.0",
-                "phpstan/phpstan": "^1.10.30",
-                "webmozart/assert": "^1.11"
+                "nette/utils": "^3.2|^4.0",
+                "php": "^7.4|^8.0",
+                "phpstan/phpstan": "^2.1.33",
+                "webmozart/assert": "^1.12 || ^2.0"
             },
             "type": "phpstan-extension",
             "extra": {
@@ -8533,6 +8530,9 @@
                 }
             },
             "autoload": {
+                "files": [
+                    "src/functions/fast-functions.php"
+                ],
                 "psr-4": {
                     "Symplify\\PHPStanRules\\": "src"
                 }
@@ -8544,7 +8544,7 @@
             "description": "Set of Symplify rules for PHPStan",
             "support": {
                 "issues": "https://github.com/symplify/phpstan-rules/issues",
-                "source": "https://github.com/symplify/phpstan-rules/tree/13.0.1"
+                "source": "https://github.com/symplify/phpstan-rules/tree/14.9.11"
             },
             "funding": [
                 {
@@ -8556,7 +8556,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-08-23T09:02:23+00:00"
+            "time": "2026-01-05T13:53:59+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -8624,5 +8624,5 @@
     "platform-overrides": {
         "php": "8.1.27"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }
diff --git a/packages/typo3-docs-theme/src/Api/Typo3ApiService.php b/packages/typo3-docs-theme/src/Api/Typo3ApiService.php
index 42768fb09..7ddd47486 100644
--- a/packages/typo3-docs-theme/src/Api/Typo3ApiService.php
+++ b/packages/typo3-docs-theme/src/Api/Typo3ApiService.php
@@ -135,6 +135,7 @@ private function decodeJson(string $jsonData): ?array
             return null;
         }
 
+        /** @var array<string, array<string, string>> $apiData */
         return $apiData;
     }
 
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/AttachFileObjectsToFileTextRoleTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/AttachFileObjectsToFileTextRoleTransformer.php
index 0f80d121d..4b4b4f6f8 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/AttachFileObjectsToFileTextRoleTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/AttachFileObjectsToFileTextRoleTransformer.php
@@ -64,7 +64,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         return $node;
     }
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectFileObjectsTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectFileObjectsTransformer.php
index 39eb6ba34..0937f2d2b 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectFileObjectsTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectFileObjectsTransformer.php
@@ -48,7 +48,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         return $node;
     }
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
index 61fa4d65d..33407d1f0 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
@@ -104,7 +104,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         if ($node instanceof DocumentNode) {
             $this->documentStack->pop();
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ConfvalMenuNodeTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ConfvalMenuNodeTransformer.php
index df27d5302..6d6fa9f62 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ConfvalMenuNodeTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ConfvalMenuNodeTransformer.php
@@ -35,7 +35,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         assert($node instanceof ConfvalMenuNode);
         if (count($node->getConfvals()) > 0) {
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RedirectsNodeTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RedirectsNodeTransformer.php
index 29756a775..8f99f3e89 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RedirectsNodeTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RedirectsNodeTransformer.php
@@ -35,7 +35,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         assert($node instanceof CrossReferenceNode);
         if ($node->getInterlinkDomain() === '') {
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RemoveInterlinkSelfReferencesFromCrossReferenceNodeTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RemoveInterlinkSelfReferencesFromCrossReferenceNodeTransformer.php
index 4bc8c8af6..145e490b5 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RemoveInterlinkSelfReferencesFromCrossReferenceNodeTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/RemoveInterlinkSelfReferencesFromCrossReferenceNodeTransformer.php
@@ -35,7 +35,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         assert($node instanceof CrossReferenceNode);
         if (!$this->themeSettings->hasSettings('interlink_shortcode')) {
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ReplacePermalinksNodeTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ReplacePermalinksNodeTransformer.php
index cddf94557..4edb1c41c 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ReplacePermalinksNodeTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/ReplacePermalinksNodeTransformer.php
@@ -32,7 +32,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         assert($node instanceof HyperLinkNode);
         if (!str_starts_with($node->getTargetReference(), 'https://docs.typo3.org/permalink/')) {
diff --git a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/Typo3TalkNodeTransformer.php b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/Typo3TalkNodeTransformer.php
index 229b66daa..88d0217ab 100644
--- a/packages/typo3-docs-theme/src/Compiler/NodeTransformers/Typo3TalkNodeTransformer.php
+++ b/packages/typo3-docs-theme/src/Compiler/NodeTransformers/Typo3TalkNodeTransformer.php
@@ -46,7 +46,7 @@ public function enterNode(Node $node, CompilerContextInterface $compilerContext)
         return $node;
     }
 
-    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node|null
+    public function leaveNode(Node $node, CompilerContextInterface $compilerContext): Node
     {
         if ($node instanceof DocumentNode) {
             $this->sectionStack = [];
diff --git a/packages/typo3-docs-theme/src/DependencyInjection/Typo3DocsThemeExtension.php b/packages/typo3-docs-theme/src/DependencyInjection/Typo3DocsThemeExtension.php
index 05984ef7c..2cd1bf4c2 100644
--- a/packages/typo3-docs-theme/src/DependencyInjection/Typo3DocsThemeExtension.php
+++ b/packages/typo3-docs-theme/src/DependencyInjection/Typo3DocsThemeExtension.php
@@ -32,7 +32,7 @@ class Typo3DocsThemeExtension extends Extension implements PrependExtensionInter
         YoutubeNode::class => 'body/directive/youtube.html.twig',
     ];
 
-    /** @param mixed[] $configs */
+    /** @param array<int, mixed> $configs */
     public function load(array $configs, ContainerBuilder $container): void
     {
         $loader = new PhpFileLoader(
diff --git a/packages/typo3-docs-theme/src/Directives/FigureDirective.php b/packages/typo3-docs-theme/src/Directives/FigureDirective.php
index 3e2d45fba..c0e21bfd2 100644
--- a/packages/typo3-docs-theme/src/Directives/FigureDirective.php
+++ b/packages/typo3-docs-theme/src/Directives/FigureDirective.php
@@ -93,7 +93,7 @@ public function process(
             'align' => $scalarOptions['align'] ?? null,
         ]);
 
-        $figureNode = new FigureNode($image, new CollectionNode($collectionNode->getChildren()));
+        $figureNode = new FigureNode($image, new CollectionNode(array_values($collectionNode->getChildren())));
 
         // Build filtered options - copy all options but validate zoom mode
         // We must set all options ourselves because DirectiveRule::postProcessNode
diff --git a/packages/typo3-docs-theme/src/Directives/GroupTabDirective.php b/packages/typo3-docs-theme/src/Directives/GroupTabDirective.php
index 10b0cda80..7ab240986 100644
--- a/packages/typo3-docs-theme/src/Directives/GroupTabDirective.php
+++ b/packages/typo3-docs-theme/src/Directives/GroupTabDirective.php
@@ -47,7 +47,7 @@ protected function processSub(
             $directive->getData(),
             $directive->getDataNode() ?? new InlineCompoundNode(),
             $key,
-            $collectionNode->getChildren(),
+            array_values($collectionNode->getChildren()),
         );
     }
 }
diff --git a/packages/typo3-docs-theme/src/Directives/IncludeDirective.php b/packages/typo3-docs-theme/src/Directives/IncludeDirective.php
index 84cb4a2ee..47cc5bb62 100644
--- a/packages/typo3-docs-theme/src/Directives/IncludeDirective.php
+++ b/packages/typo3-docs-theme/src/Directives/IncludeDirective.php
@@ -159,7 +159,7 @@ public function getCollectionFromPath(\League\Flysystem\FilesystemInterface|\php
         if ($directive->getOptionBool('show-buttons')) {
             $buttons[] = new EditOnGithubIncludeNode($path);
         }
-        return new CollectionNode(array_merge($buttons, $document->getChildren()));
+        return new CollectionNode(array_values(array_merge($buttons, $document->getChildren())));
     }
 
     /**
diff --git a/packages/typo3-docs-theme/src/Directives/SiteSetSettingsDirective.php b/packages/typo3-docs-theme/src/Directives/SiteSetSettingsDirective.php
index 74038e342..cda78f18e 100644
--- a/packages/typo3-docs-theme/src/Directives/SiteSetSettingsDirective.php
+++ b/packages/typo3-docs-theme/src/Directives/SiteSetSettingsDirective.php
@@ -63,6 +63,10 @@ public function processNode(
             if (!is_array($yamlData) || !is_array($yamlData['settings'] ?? false)) {
                 throw new FileLoadingException(sprintf('The .. typo3:site-set-settings:: source at path %s did not contain any settings ', $directive->getData()));
             }
+            /** @var array<string, array<string, scalar>> $settings */
+            $settings = $yamlData['settings'];
+            /** @var array<string, array<string, string>> $yamlCategories */
+            $yamlCategories = is_array($yamlData['categories'] ?? null) ? $yamlData['categories'] : [];
         } catch (FileLoadingException $exception) {
             $this->logger->warning($exception->getMessage(), $blockContext->getLoggerInformation());
             return $this->getErrorNode();
@@ -85,9 +89,9 @@ public function processNode(
 
         $labelContents = '';
         // Assume all EXT: references are relative to the rendered PROJECT
-        $labelsFile = $labelsFile ?
-            preg_replace('/^EXT:[^\/]*\//', 'PROJECT:/', $labelsFile) :
-            dirname($setConfigurationFile) . '/labels.xlf';
+        $labelsFile = is_string($labelsFile) && $labelsFile !== ''
+            ? (preg_replace('/^EXT:[^\/]*\//', 'PROJECT:/', $labelsFile) ?? $labelsFile)
+            : dirname($setConfigurationFile) . '/labels.xlf';
         try {
             $labelContents = $this->loadFileFromDocumentation($blockContext, $labelsFile);
         } catch (FileLoadingException $exception) {
@@ -102,7 +106,8 @@ public function processNode(
             if ($xml->loadXML($labelContents)) {
                 foreach ($xml->getElementsByTagName('trans-unit') as $label) {
                     $id = $label->getAttribute('id');
-                    $value = ($label->getElementsByTagName('source')[0] ?? null)?->textContent ?? '';
+                    $sourceElements = $label->getElementsByTagName('source');
+                    $value = $sourceElements->length > 0 ? ($sourceElements->item(0)->textContent ?? '') : '';
                     if (!$value) {
                         continue;
                     }
@@ -117,7 +122,7 @@ public function processNode(
             }
         }
 
-        return $this->buildConfvalMenu($directive, $yamlData['settings'], $yamlData['categories'] ?? [], $labels, $descriptions, $categoryLabels);
+        return $this->buildConfvalMenu($directive, $settings, $yamlCategories, $labels, $descriptions, $categoryLabels);
     }
 
     /**
@@ -174,7 +179,7 @@ private function getErrorNode(): ParagraphNode
     }
 
     /**
-     * @param array<string, array<string, string>> $settings
+     * @param array<string, array<string, scalar>> $settings
      * @param array<string, array<string, string>> $categories
      * @param array<string, string> $labels
      * @param array<string, string> $descriptions
@@ -187,18 +192,24 @@ public function buildConfvalMenu(Directive $directive, array $settings, array $c
             $idPrefix = $directive->getOptionString('name') . '-';
         }
         $categoryArray = $this->buildCategoryArray($categories, $categoryLabels);
+        /** @var list<array<string, mixed>> $rootCategories */
         $rootCategories = [];
         foreach ($categoryArray as $key => $category) {
-            if (isset($categoryArray[$category['parent']])) {
-                assert(is_array($categoryArray[$category['parent']]['children']));
-                $categoryArray[$category['parent']]['children'][] = &$categoryArray[$key];
+            $parent = is_string($category['parent'] ?? null) ? $category['parent'] : '';
+            if ($parent !== '' && isset($categoryArray[$parent])) {
+                assert(is_array($categoryArray[$parent]['children']));
+                $categoryArray[$parent]['children'][] = &$categoryArray[$key];
             } else {
                 $rootCategories[] = &$categoryArray[$key];
             }
         }
         foreach ($settings as $key => $setting) {
-            $confval = $this->buildConfval($setting, $idPrefix, $key, $directive, $labels, $descriptions, $categoryArray);
-            $this->assignConfvalsToCategories($setting['category'] ?? '', $categoryArray, $confval, $rootCategories);
+            if (!is_array($setting)) {
+                continue;
+            }
+            $confval = $this->buildConfval($setting, $idPrefix, (string) $key, $directive, $labels, $descriptions, $categoryArray);
+            $settingCategory = is_string($setting['category'] ?? null) ? $setting['category'] : '';
+            $this->assignConfvalsToCategories($settingCategory, $categoryArray, $confval, $rootCategories);
         }
         $confvals = $this->buildCategoryConfvals($rootCategories, $idPrefix, $directive);
         $reservedParameterNames = [
@@ -237,13 +248,14 @@ public function buildConfvalMenu(Directive $directive, array $settings, array $c
 
 
     /**
-     * @param array<string, scalar|array<string, scalar>> $setting
+     * @param array<string, mixed> $setting
      * @param array<string, string> $labels
      * @param array<string, string> $descriptions
-     * @param array<string, array<string, string>> $categoryArray
+     * @param array<string, array<string, mixed>> $categoryArray
      */
     public function buildConfval(array $setting, string $idPrefix, string $key, Directive $directive, array $labels, array $descriptions, array $categoryArray): ConfvalNode
     {
+        /** @var list<Node> $content */
         $content = [];
         $description = $setting['description'] ?? $descriptions[$key] ?? false;
         if (is_string($description)) {
@@ -315,12 +327,13 @@ private function customPrint(mixed $value): string
 
 
     /**
-     * @param array<string, array<string, string>> $categoryArray
+     * @param array<string, array<string, mixed>> $categoryArray
      */
     private function getCategoryRootline(array $categoryArray, string $key): string
     {
-        $label = $categoryArray[$key]['label'] ?? $key;
-        $parent = $categoryArray[$key]['parent'] ?? '';
+        $categoryEntry = $categoryArray[$key] ?? [];
+        $label = is_string($categoryEntry['label'] ?? null) ? $categoryEntry['label'] : $key;
+        $parent = is_string($categoryEntry['parent'] ?? null) ? $categoryEntry['parent'] : '';
         if ($parent === '') {
             return $label;
         }
@@ -331,7 +344,7 @@ private function getCategoryRootline(array $categoryArray, string $key): string
     }
 
     /**
-     * @param array<string, array<string, mixed>> $categories
+     * @param array<string, array<string, string>> $categories
      * @param array<string, string> $categoryLabels
      * @return array<string, array<string, mixed>>
      */
@@ -352,7 +365,7 @@ public function buildCategoryArray(array $categories, array $categoryLabels): ar
 
     /**
      * @param array<string, array<string, mixed>> $categoryArray
-     * @param array<array<string, mixed>> $rootCategories
+     * @param list<array<string, mixed>> $rootCategories
      */
     public function assignConfvalsToCategories(string $category, array &$categoryArray, ConfvalNode $confval, array &$rootCategories): void
     {
@@ -371,7 +384,7 @@ public function assignConfvalsToCategories(string $category, array &$categoryArr
     }
 
     /**
-     * @param array<array<string, mixed>> $categories
+     * @param list<array<string, mixed>> $categories
      * @return ConfvalNode[]
      */
     private function buildCategoryConfvals(array $categories, string $idPrefix, Directive $directive): array
@@ -382,23 +395,24 @@ private function buildCategoryConfvals(array $categories, string $idPrefix, Dire
         $confvals = [];
         foreach ($categories as $category) {
             $children = [];
-            if (is_array($category['children'] ?? false)) {
-                $children = $this->buildCategoryConfvals($category['children'], $idPrefix, $directive);
+            $categoryChildren = $category['children'] ?? [];
+            if (is_array($categoryChildren) && $categoryChildren !== []) {
+                /** @var list<array<string, mixed>> $categoryChildren */
+                $children = $this->buildCategoryConfvals($categoryChildren, $idPrefix, $directive);
             }
-            $key =  $category['key'];
+            $key = is_string($category['key'] ?? null) ? $category['key'] : '';
             if ($key === '') {
                 $key = '_global';
             }
-            assert(is_string($key));
             $additionalFields = [];
             $additionalFields['searchFacet'] = new InlineCompoundNode([new PlainTextInlineNode(self::CATEGORY_FACET)]);
 
-            $label = $category['label'];
+            $label = is_string($category['label'] ?? null) ? $category['label'] : '';
             if ($label !== '') {
-                assert(is_string($label));
                 $additionalFields['Label'] = new InlineCompoundNode([new PlainTextInlineNode($label)]);
             }
-            assert(is_array($category['confvals']));
+            /** @var list<Node> $categoryConfvals */
+            $categoryConfvals = is_array($category['confvals'] ?? null) ? $category['confvals'] : [];
             $confvals[] = new ConfvalNode(
                 $this->anchorNormalizer->reduceAnchor($idPrefix . 'category-' . $key),
                 $key,
@@ -406,7 +420,7 @@ private function buildCategoryConfvals(array $categories, string $idPrefix, Dire
                 false,
                 null,
                 $additionalFields,
-                array_merge($children, $category['confvals']),
+                array_values(array_merge($children, $categoryConfvals)),
                 $directive->getOptionBool('noindex'),
             );
         }
diff --git a/packages/typo3-docs-theme/src/Directives/Typo3FileDirective.php b/packages/typo3-docs-theme/src/Directives/Typo3FileDirective.php
index c68ea4b0c..cebd08ae0 100644
--- a/packages/typo3-docs-theme/src/Directives/Typo3FileDirective.php
+++ b/packages/typo3-docs-theme/src/Directives/Typo3FileDirective.php
@@ -47,7 +47,7 @@ protected function processSub(
         BlockContext $blockContext,
         CollectionNode $collectionNode,
         Directive $directive,
-    ): Node|null {
+    ): Node {
         $filename = $directive->getData();
         $path = $directive->getOptionString('path');
         $language = $directive->getOptionString('language');
diff --git a/packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php b/packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
index 59649eeb1..047c29910 100644
--- a/packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
+++ b/packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
@@ -95,12 +95,20 @@ public function processNode(
 
         $noindex = $directive->getOptionBool('noindex');
 
+        /** @var array<string, mixed> $data */
         $data = $json['viewHelpers'][$directive->getData()];
-        $viewHelperNode = $this->getViewHelperNode($directive, $data, $json['sourceEdit'] ?? [], $blockContext, $noindex);
+        /** @var array<string, array{sourcePrefix: string, editPrefix: string}> $sourceEdit */
+        $sourceEdit = is_array($json['sourceEdit'] ?? null) ? $json['sourceEdit'] : [];
+        $viewHelperNode = $this->getViewHelperNode($directive, $data, $sourceEdit, $blockContext, $noindex);
+        /** @var array<string, ViewHelperArgumentNode> $arguments */
         $arguments = [];
-        foreach ($json['viewHelpers'][$directive->getData()]['argumentDefinitions'] ?? [] as $argumentDefinition) {
-            if (is_array($argumentDefinition)) {
-                $arguments[$this->getString($argumentDefinition, 'name')] = $this->getArgument($argumentDefinition, $viewHelperNode, $noindex);
+        $argumentDefs = $data['argumentDefinitions'] ?? [];
+        if (is_array($argumentDefs)) {
+            foreach ($argumentDefs as $argumentDefinition) {
+                if (is_array($argumentDefinition)) {
+                    /** @var array<string, string> $argumentDefinition */
+                    $arguments[$this->getString($argumentDefinition, 'name')] = $this->getArgument($argumentDefinition, $viewHelperNode, $noindex);
+                }
             }
         }
         if ($sortBy === 'name') {
@@ -155,35 +163,45 @@ public function getArgument(array $argumentDefinition, ViewHelperNode $viewHelpe
     private function getViewHelperNode(Directive $directive, array $data, array $sourceEdit, BlockContext $blockContext, bool $noindex): ViewHelperNode
     {
         $rawDocumentation = $this->getString($data, 'documentation');
+        /** @var list<Node> $description */
         $description = [];
+        /** @var list<Node> $sections */
         $sections = [];
+        /** @var list<Node> $examples */
         $examples = [];
         if (str_contains($rawDocumentation, '```')) {
-            $node = $this->markupLanguageParser->parse($blockContext->getDocumentParserContext()->getContext(), $rawDocumentation);
-            $collectionNode = new CollectionNode($node->getValue());
-            foreach ($node->getValue() as $node) {
-                if ($node instanceof ParagraphNode) {
-                    $description[] = $node;
+            $documentNode = $this->markupLanguageParser->parse($blockContext->getDocumentParserContext()->getContext(), $rawDocumentation);
+            $rawValue = $documentNode->getValue();
+            /** @var list<Node> $childNodes */
+            $childNodes = is_array($rawValue) ? array_values($rawValue) : [];
+            $collectionNode = new CollectionNode($childNodes);
+            foreach ($childNodes as $childNode) {
+                if ($childNode instanceof ParagraphNode) {
+                    $description[] = $childNode;
                 }
-                if ($node instanceof CodeNode) {
-                    $examples[] = $node;
+                if ($childNode instanceof CodeNode) {
+                    $examples[] = $childNode;
                 }
             }
         } else {
             $rstContentBlockContext = new BlockContext($blockContext->getDocumentParserContext(), $rawDocumentation, false);
-            $collectionNode = $this->startingRule->apply($rstContentBlockContext);
-            foreach ($collectionNode->getValue() as $node) {
-                if (!$node instanceof SectionNode) {
-                    $description[] = $node;
+            $parsedNode = $this->startingRule->apply($rstContentBlockContext);
+            $rawValue = $parsedNode?->getValue();
+            /** @var list<Node> $collectionChildren */
+            $collectionChildren = is_array($rawValue) ? array_values($rawValue) : [];
+            $collectionNode = new CollectionNode($collectionChildren);
+            foreach ($collectionChildren as $childNode) {
+                if (!$childNode instanceof SectionNode) {
+                    $description[] = $childNode;
                 }
             }
-            foreach ($collectionNode->getValue() as $node) {
-                if ($node instanceof SectionNode) {
-                    $title = $node->getTitle()->toString();
+            foreach ($collectionChildren as $childNode) {
+                if ($childNode instanceof SectionNode) {
+                    $title = $childNode->getTitle()->toString();
                     if (stripos($title, 'example') !== false) { // Case-insensitive check for 'example'
-                        $examples[] = $node;
+                        $examples[] = $childNode;
                     } else {
-                        $sections[] = $node;
+                        $sections[] = $childNode;
                     }
                 }
             }
@@ -201,19 +219,22 @@ private function getViewHelperNode(Directive $directive, array $data, array $sou
             $display =  array_map('trim', explode(',', $directive->getOptionString('display')));
         }
         $viewHelperId = $this->anchorNormalizer->reduceAnchor($className);
+        $rawDocs = $collectionNode->getValue();
+        /** @var list<Node> $documentationNodes */
+        $documentationNodes = is_array($rawDocs) ? $rawDocs : [];
         $viewHelperNode = new ViewHelperNode(
             id: $viewHelperId,
             tagName: $this->getString($data, 'tagName'),
             shortClassName: $shortClassName,
             namespace: $nameSpace,
             className: $className,
-            documentation: $collectionNode?->getValue() ?? [],
+            documentation: $documentationNodes,
             description: $description,
             sections: $sections,
             examples: $examples,
             xmlNamespace: $xmlNamespace,
             allowsArbitraryArguments: ($data['allowsArbitraryArguments'] ?? false) === true,
-            docTags: $data['docTags'] ?? [],
+            docTags: $this->extractDocTags($data),
             gitHubLink: $gitHubLink,
             noindex: $noindex,
             display: $display,
@@ -222,6 +243,25 @@ className: $className,
         return $viewHelperNode;
     }
 
+    /**
+     * @param array<string, mixed> $data
+     * @return array<string, string>
+     */
+    private function extractDocTags(array $data): array
+    {
+        $docTags = $data['docTags'] ?? [];
+        if (!is_array($docTags)) {
+            return [];
+        }
+        $result = [];
+        foreach ($docTags as $key => $value) {
+            if (is_string($key) && is_scalar($value)) {
+                $result[$key] = (string) $value;
+            }
+        }
+        return $result;
+    }
+
     private function getErrorNode(): ParagraphNode
     {
         return new ParagraphNode([new InlineCompoundNode([new PlainTextInlineNode('The ViewHelper cannot be displayed.')])]);
diff --git a/packages/typo3-docs-theme/src/EventListeners/AddThemeSettingsToProjectNode.php b/packages/typo3-docs-theme/src/EventListeners/AddThemeSettingsToProjectNode.php
index e65e1a148..f1e4f7caf 100644
--- a/packages/typo3-docs-theme/src/EventListeners/AddThemeSettingsToProjectNode.php
+++ b/packages/typo3-docs-theme/src/EventListeners/AddThemeSettingsToProjectNode.php
@@ -21,7 +21,8 @@ public function __invoke(PostProjectNodeCreated $event): void
         // Native parsing of argv because we do not have the original ArgvInput
         // available, and neither the InputDefinition. That's ok for the
         // very basic parsing of a global option.
-        if (in_array('--minimal-test', $_SERVER['argv'] ?? [], true)) {
+        $argv = (array) ($_SERVER['argv'] ?? []);
+        if (in_array('--minimal-test', $argv, true)) {
             $settings = $event->getSettings();
 
             // Set up input arguments for our minimal test. Will override
diff --git a/packages/typo3-docs-theme/src/Inventory/Typo3InventoryRepository.php b/packages/typo3-docs-theme/src/Inventory/Typo3InventoryRepository.php
index 81cc92494..96fd09752 100644
--- a/packages/typo3-docs-theme/src/Inventory/Typo3InventoryRepository.php
+++ b/packages/typo3-docs-theme/src/Inventory/Typo3InventoryRepository.php
@@ -133,6 +133,7 @@ private function tryLoadInventoryJson(string $reducedKey, string $inventoryUrl):
             if ($json === []) {
                 return false;
             }
+            /** @var array<string, mixed> $json */
             $this->loadInventoryFromJson($inventoryUrl, $json, $reducedKey);
             return true;
         } catch (ClientException) {
@@ -141,7 +142,7 @@ private function tryLoadInventoryJson(string $reducedKey, string $inventoryUrl):
     }
 
     /**
-     * @param array<mixed> $json
+     * @param array<string, mixed> $json
      */
     private function loadInventoryFromJson(string $inventoryUrl, array $json, string $reducedKey): void
     {
diff --git a/packages/typo3-docs-theme/src/Nodes/ConfvalMenuNode.php b/packages/typo3-docs-theme/src/Nodes/ConfvalMenuNode.php
index e9ae43c51..77d821029 100644
--- a/packages/typo3-docs-theme/src/Nodes/ConfvalMenuNode.php
+++ b/packages/typo3-docs-theme/src/Nodes/ConfvalMenuNode.php
@@ -35,7 +35,7 @@ public function __construct(
         private readonly bool $noindex = false,
         private readonly string $facet = 'Option',
     ) {
-        parent::__construct('confval-menu', $plainContent, $content, $value);
+        parent::__construct('confval-menu', $plainContent, $content, array_values($value));
     }
 
     public function getId(): string
diff --git a/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListItemNode.php b/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListItemNode.php
index 911c041c9..b6fa1b4b7 100644
--- a/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListItemNode.php
+++ b/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListItemNode.php
@@ -18,7 +18,7 @@ public function __construct(
         private readonly string $name,
         private readonly array $subLists,
     ) {
-        parent::__construct($items);
+        parent::__construct(array_values($items));
     }
 
     public function getName(): string
diff --git a/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListNode.php b/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListNode.php
index 5109a4af1..6f072b939 100644
--- a/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListNode.php
+++ b/packages/typo3-docs-theme/src/Nodes/DirectoryTree/DirectoryTreeListNode.php
@@ -12,7 +12,7 @@ final class DirectoryTreeListNode extends CompoundNode
      */
     public function __construct(array $items, private readonly string $name)
     {
-        parent::__construct($items);
+        parent::__construct(array_values($items));
     }
 
     public function getName(): string
diff --git a/packages/typo3-docs-theme/src/Nodes/GlossaryNode.php b/packages/typo3-docs-theme/src/Nodes/GlossaryNode.php
index 1bea24a8c..876535fe9 100644
--- a/packages/typo3-docs-theme/src/Nodes/GlossaryNode.php
+++ b/packages/typo3-docs-theme/src/Nodes/GlossaryNode.php
@@ -18,7 +18,7 @@ public function __construct(
         array $value = [],
         protected array $entries = [],
     ) {
-        parent::__construct('glossary', $plainContent, $content, $value);
+        parent::__construct('glossary', $plainContent, $content, array_values($value));
     }
 
     /**
diff --git a/packages/typo3-docs-theme/src/Nodes/MainMenuJsonNode.php b/packages/typo3-docs-theme/src/Nodes/MainMenuJsonNode.php
index 03a2c3f4e..608388865 100644
--- a/packages/typo3-docs-theme/src/Nodes/MainMenuJsonNode.php
+++ b/packages/typo3-docs-theme/src/Nodes/MainMenuJsonNode.php
@@ -16,7 +16,7 @@ public function __construct(
         protected readonly InlineCompoundNode $content,
         array $value = [],
     ) {
-        parent::__construct('main-menu-json', $plainContent, $content, $value);
+        parent::__construct('main-menu-json', $plainContent, $content, array_values($value));
     }
 
 }
diff --git a/packages/typo3-docs-theme/src/Nodes/ViewHelperNode.php b/packages/typo3-docs-theme/src/Nodes/ViewHelperNode.php
index 8e88b5f8b..e3f850fb3 100644
--- a/packages/typo3-docs-theme/src/Nodes/ViewHelperNode.php
+++ b/packages/typo3-docs-theme/src/Nodes/ViewHelperNode.php
@@ -41,7 +41,7 @@ public function __construct(
         private readonly array $display = [],
         private array $arguments = [],
     ) {
-        parent::__construct('viewhelper', $tagName, new InlineCompoundNode([new PlainTextInlineNode($tagName)]), $documentation);
+        parent::__construct('viewhelper', $tagName, new InlineCompoundNode([new PlainTextInlineNode($tagName)]), array_values($documentation));
     }
 
     /**
@@ -131,7 +131,7 @@ public function getArguments(): array
     }
 
     /**
-     * @param ViewHelperArgumentNode[] $arguments
+     * @param array<string, ViewHelperArgumentNode> $arguments
      */
     public function setArguments(array $arguments): void
     {
diff --git a/packages/typo3-docs-theme/src/Twig/TwigExtension.php b/packages/typo3-docs-theme/src/Twig/TwigExtension.php
index dad53fd35..e3cc2635b 100644
--- a/packages/typo3-docs-theme/src/Twig/TwigExtension.php
+++ b/packages/typo3-docs-theme/src/Twig/TwigExtension.php
@@ -699,9 +699,8 @@ public function getPagerLinks(array $context): array
      */
     public function getSingleHtmlLink(array $context): ?string
     {
-        /** @var RenderContext|null $renderContext */
         $renderContext = $context['env'] ?? null;
-        if (!$renderContext) {
+        if (!$renderContext instanceof RenderContext) {
             return null;
         }
 
@@ -729,9 +728,8 @@ public function getSingleHtmlLink(array $context): ?string
      */
     public function getTopPageLink(array $context): ?PageLinkNode
     {
-        /** @var RenderContext|null $renderContext */
         $renderContext = $context['env'] ?? null;
-        if (!$renderContext) {
+        if (!$renderContext instanceof RenderContext) {
             return null;
         }
 
diff --git a/packages/typo3-guides-cli/src/Command/ConfigureCommand.php b/packages/typo3-guides-cli/src/Command/ConfigureCommand.php
index dfd24edd5..f78b4de61 100644
--- a/packages/typo3-guides-cli/src/Command/ConfigureCommand.php
+++ b/packages/typo3-guides-cli/src/Command/ConfigureCommand.php
@@ -255,7 +255,12 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $output->writeln(print_r($input->getOptions(), true));
         }
 
-        $config = $input->getArgument('input') . '/guides.xml';
+        $inputPath = $input->getArgument('input');
+        if (!is_string($inputPath)) {
+            $output->writeln('<error>Input argument must be a string path</error>');
+            return Command::FAILURE;
+        }
+        $config = $inputPath . '/guides.xml';
 
         if ($output->isVeryVerbose()) {
             $output->writeln(sprintf('Config: <info>%s</info>', $config));
@@ -337,6 +342,8 @@ private function operateOnXmlProject(\SimpleXMLElement $xml, InputInterface $inp
 
     private function operateOnXmlGuides(\SimpleXMLElement $xml, InputInterface $input, OutputInterface $output): bool
     {
+        $guides = $xml->xpath('/ns:guides');
+
         $guidesVariables = [
             'input'                 => $input->getOption('guides-input'),
             'input-file'            => $input->getOption('guides-input-file'),
diff --git a/packages/typo3-guides-cli/src/Command/InitCommand.php b/packages/typo3-guides-cli/src/Command/InitCommand.php
index 01adc3729..e6c96ef21 100644
--- a/packages/typo3-guides-cli/src/Command/InitCommand.php
+++ b/packages/typo3-guides-cli/src/Command/InitCommand.php
@@ -46,8 +46,10 @@ protected function execute(InputInterface $input, OutputInterface $output): int
     {
         if ($input->getOption('working-dir')) {
             $workdir = $input->getOption('working-dir');
-            assert(is_string($workdir));
-            $workdir = (string) $workdir;
+            if (!is_string($workdir)) {
+                $output->writeln('<error>Working directory must be a string</error>');
+                return Command::INVALID;
+            }
 
             if (chdir($workdir)) {
                 $output->writeln('<info>Changed working directory to ' . getcwd() . '</info>');
@@ -98,7 +100,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $composerInfo->getComposerName()
         );
         $projectNameQuestion->setValidator(function ($answer) {
-            if (is_null($answer) || trim($answer) === '') {
+            if (!is_string($answer) || trim($answer) === '') {
                 throw new \RuntimeException('The project title cannot be empty.');
             }
             return $answer;
@@ -125,6 +127,9 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             ]
         );
         $repositoryUrl = $helper->ask($input, $output, $question);
+        if (!is_string($repositoryUrl)) {
+            $repositoryUrl = '';
+        }
 
         $question = $this->createValidatedUrlQuestion(
             'Where can users report issues?  <comment>[%s]</comment>',
@@ -149,7 +154,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         $question = new Question('Do you want generate some Documentation? (yes/no) ', 'yes');
         $question->setValidator(function ($answer) {
-            if (!in_array(strtolower($answer), [
+            if (!is_string($answer) || !in_array(strtolower($answer), [
                 'yes',
                 'y',
                 'no',
@@ -173,6 +178,9 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         if (is_string($siteSet) && $siteSet !== '') {
             $question = new Question('Enter the path to your site set: ');
             $siteSetPath = $helper->ask($input, $output, $question);
+            if (!is_string($siteSetPath)) {
+                $siteSetPath = '';
+            }
             if (is_file($siteSetPath . '/settings.definitions.yaml')) {
                 $siteSetDefinition = $siteSetPath . '/settings.definitions.yaml';
             }
@@ -192,9 +200,8 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             mkdir($outputDir, 0o777, true);
         }
 
-        assert(is_string($repositoryUrl ?? ''));
         $editOnGitHub = null;
-        if (str_starts_with($repositoryUrl ?? '', 'https://github.com/')) {
+        if (str_starts_with($repositoryUrl, 'https://github.com/')) {
             $editOnGitHub = str_replace('https://github.com/', '', $repositoryUrl);
         }
         // Define your data
@@ -275,6 +282,7 @@ private function fetchComposerArray(): array|null
             return null;
         }
 
+        /** @var array<string, mixed> $composerJson */
         return $composerJson;
     }
 
diff --git a/packages/typo3-guides-cli/src/Command/MigrateSettingsCommand.php b/packages/typo3-guides-cli/src/Command/MigrateSettingsCommand.php
index ffd3a5ecf..195219bc9 100644
--- a/packages/typo3-guides-cli/src/Command/MigrateSettingsCommand.php
+++ b/packages/typo3-guides-cli/src/Command/MigrateSettingsCommand.php
@@ -57,8 +57,13 @@ protected function configure(): void
 
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
-        $settingsFile = $input->getArgument('input') . '/Settings.cfg';
-        $guidesFile = $input->getArgument('input') . '/guides.xml';
+        $inputPath = $input->getArgument('input');
+        if (!is_string($inputPath)) {
+            $output->writeln('<error>Input argument must be a string path</error>');
+            return Command::FAILURE;
+        }
+        $settingsFile = $inputPath . '/Settings.cfg';
+        $guidesFile = $inputPath . '/guides.xml';
 
         if (file_exists($guidesFile) && !$input->getOption('force')) {
             $output->writeln('<error>Target file already exists in specified directory (' . $guidesFile . ')</error>');
diff --git a/packages/typo3-guides-cli/src/Migration/SettingsMigrator.php b/packages/typo3-guides-cli/src/Migration/SettingsMigrator.php
index ce68c77d0..ba4de1fe5 100644
--- a/packages/typo3-guides-cli/src/Migration/SettingsMigrator.php
+++ b/packages/typo3-guides-cli/src/Migration/SettingsMigrator.php
@@ -56,7 +56,7 @@ public function migrate(array $legacySettings): MigrationResult
         // Attach the <guides> element to the root XML
         $this->xmlDocument->appendChild($guides);
 
-        return new MigrationResult($this->xmlDocument, $this->convertedSettings, $messages);
+        return new MigrationResult($this->xmlDocument, $this->convertedSettings, array_values($messages));
     }
 
     private function createRootElement(): \DOMElement
@@ -158,6 +158,7 @@ private function createInventorySection(): array
         return $inventories;
     }
 
+    /** @return list<string> */
     private function collectUnmigratedLegacySettings(): array
     {
         $messages = [];
diff --git a/packages/typo3-guides-cli/src/Repository/LegacySettingsRepository.php b/packages/typo3-guides-cli/src/Repository/LegacySettingsRepository.php
index 17380cc2b..d632ab3b7 100644
--- a/packages/typo3-guides-cli/src/Repository/LegacySettingsRepository.php
+++ b/packages/typo3-guides-cli/src/Repository/LegacySettingsRepository.php
@@ -37,6 +37,7 @@ public function get(string $filePath): array
             throw FileException::notParsable($filePath);
         }
 
+        /** @var array<string, array<string, string>> $settings */
         return $settings;
     }
 }
diff --git a/packages/typo3-guides-cli/src/XmlValidator.php b/packages/typo3-guides-cli/src/XmlValidator.php
index 3694233e1..066e98817 100644
--- a/packages/typo3-guides-cli/src/XmlValidator.php
+++ b/packages/typo3-guides-cli/src/XmlValidator.php
@@ -70,7 +70,7 @@ public function validate(): bool
     }
 
     // Custom error handler function within the class
-    private function errorHandler(mixed $errno, string $errstr): void
+    private function errorHandler(int $errno, string $errstr): void
     {
         $this->errors[] = 'xxx' . $errno . ': ' . $errstr;
     }
diff --git a/packages/typo3-guides-extension/src/Command/RunDecorator.php b/packages/typo3-guides-extension/src/Command/RunDecorator.php
index cf5d471da..b97fa0051 100644
--- a/packages/typo3-guides-extension/src/Command/RunDecorator.php
+++ b/packages/typo3-guides-extension/src/Command/RunDecorator.php
@@ -249,6 +249,9 @@ public function renderSingleLocalization(string $availableLocalization, array $b
     {
         $localInputDirectives = [];
         foreach ($baseInputDirectives as $baseInputDirectiveKey => $baseInputDirectiveValue) {
+            if (!is_scalar($baseInputDirectiveValue)) {
+                continue;
+            }
             $localInputDirectives[$baseInputDirectiveKey] = $baseInputDirectiveValue . DIRECTORY_SEPARATOR . $availableLocalization;
         }
         $output->writeln(sprintf('<info>Trying to render %s ...</info>', $availableLocalization));
@@ -285,7 +288,7 @@ public function renderSingleLocalization(string $availableLocalization, array $b
         $process = new Process($processArguments);
         $output->writeln(sprintf('<info>SUB-PROCESS:</info> %s', $process->getCommandLine()));
         $hasErrors = false;
-        $result = $process->run(function ($type, $buffer) use ($output, &$hasErrors): void {
+        $result = $process->run(function (string $type, string $buffer) use ($output, &$hasErrors): void {
             if ($type === Process::ERR) {
                 $output->write('<error>' . $buffer . '</error>');
                 $hasErrors = true;
diff --git a/packages/typo3-version-handling/src/Packagist/PackagistService.php b/packages/typo3-version-handling/src/Packagist/PackagistService.php
index 92977f4dc..b8374be13 100644
--- a/packages/typo3-version-handling/src/Packagist/PackagistService.php
+++ b/packages/typo3-version-handling/src/Packagist/PackagistService.php
@@ -22,11 +22,22 @@ public function getComposerInfo(string $composerName): ComposerPackage
 
         // Decode JSON response
         $packageData = json_decode($packageResponse, true);
-        if (!isset($packageData['packages'][$composerName][0]) || !is_array($packageData['packages'][$composerName][0])) {
+        if (!is_array($packageData)) {
             $this->cache[$composerName] = new ComposerPackage($composerName, 'composer req ' . $composerName, 'not found');
             return $this->cache[$composerName];
         }
-        $packageVersionData = $packageData['packages'][$composerName][0];
+        $packages = $packageData['packages'] ?? null;
+        if (!is_array($packages)) {
+            $this->cache[$composerName] = new ComposerPackage($composerName, 'composer req ' . $composerName, 'not found');
+            return $this->cache[$composerName];
+        }
+        $composerVersions = $packages[$composerName] ?? null;
+        if (!is_array($composerVersions) || !isset($composerVersions[0]) || !is_array($composerVersions[0])) {
+            $this->cache[$composerName] = new ComposerPackage($composerName, 'composer req ' . $composerName, 'not found');
+            return $this->cache[$composerName];
+        }
+        /** @var array<string, mixed> $packageVersionData */
+        $packageVersionData = $composerVersions[0];
 
         $this->cache[$composerName] = $this->getComposerInfoFromJson(
             $packageVersionData,
@@ -99,9 +110,8 @@ public function fetchPackageData(string $url): bool|string
         if ($this->timeoutOccurred) {
             return false;
         }
-        $ch = curl_init();
-        curl_setopt($ch, CURLOPT_URL, $url);
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+        $ch = curl_init($url);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
         curl_setopt($ch, CURLOPT_TIMEOUT, 10);
         curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
         $errorNumber = curl_errno($ch);
diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index 3af0ed08c..065bb7d77 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -1,66 +1,31 @@
 parameters:
 	ignoreErrors:
 		-
-			message: "#^Argument of an invalid type mixed supplied for foreach, only iterables are supported\\.$#"
-			count: 2
-			path: packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
-
-		-
-			message: "#^Cannot call method getValue\\(\\) on phpDocumentor\\\\Guides\\\\Nodes\\\\Node\\|null\\.$#"
-			count: 2
-			path: packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
-
-		-
-			message: "#^Parameter \\$description of class T3Docs\\\\Typo3DocsTheme\\\\Nodes\\\\ViewHelperNode constructor expects array\\<phpDocumentor\\\\Guides\\\\Nodes\\\\Node\\>, array\\<int\\<0, max\\>, mixed\\> given\\.$#"
-			count: 1
-			path: packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
-
-		-
-			message: "#^Parameter \\$docTags of class T3Docs\\\\Typo3DocsTheme\\\\Nodes\\\\ViewHelperNode constructor expects array\\<string, string\\>, mixed given\\.$#"
-			count: 1
-			path: packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
-
-		-
-			message: "#^Parameter \\$documentation of class T3Docs\\\\Typo3DocsTheme\\\\Nodes\\\\ViewHelperNode constructor expects array\\<phpDocumentor\\\\Guides\\\\Nodes\\\\Node\\>, mixed given\\.$#"
-			count: 1
-			path: packages/typo3-docs-theme/src/Directives/ViewHelperDirective.php
-
-		-
-			message: "#^Result of && is always false\\.$#"
+			message: '#^Argument of an invalid type mixed supplied for foreach, only iterables are supported\.$#'
+			identifier: foreach.nonIterable
 			count: 1
-			path: packages/typo3-guides-cli/src/Command/ConfigureCommand.php
+			path: packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
 
 		-
-			message: "#^SimpleXMLElement does not accept string\\.$#"
-			count: 4
-			path: packages/typo3-guides-cli/src/Command/ConfigureCommand.php
-
-		-
-			message: "#^Undefined variable\\: \\$guides$#"
+			message: '#^Binary operation "\." between mixed and string results in an error\.$#'
+			identifier: binaryOp.invalid
 			count: 2
-			path: packages/typo3-guides-cli/src/Command/ConfigureCommand.php
-
-		-
-			message: "#^Variable \\$guides in isset\\(\\) is never defined\\.$#"
-			count: 1
-			path: packages/typo3-guides-cli/src/Command/ConfigureCommand.php
-
-		-
-			message: "#^Method T3Docs\\\\GuidesCli\\\\Migration\\\\SettingsMigrator\\:\\:collectUnmigratedLegacySettings\\(\\) return type has no value type specified in iterable type array\\.$#"
-			count: 1
-			path: packages/typo3-guides-cli/src/Migration/SettingsMigrator.php
+			path: packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
 
 		-
-			message: "#^Cannot access offset 'packages' on mixed\\.$#"
-			count: 1
-			path: packages/typo3-version-handling/src/Packagist/PackagistService.php
+			message: '#^Parameter \#1 \$rawAnchor of method phpDocumentor\\Guides\\ReferenceResolvers\\AnchorNormalizer\:\:reduceAnchor\(\) expects string, mixed given\.$#'
+			identifier: argument.type
+			count: 2
+			path: packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
 
 		-
-			message: "#^Cannot access offset 0 on mixed\\.$#"
-			count: 1
-			path: packages/typo3-version-handling/src/Packagist/PackagistService.php
+			message: '#^Parameter \#3 \$title of class phpDocumentor\\Guides\\Meta\\InternalTarget constructor expects string\|null, mixed given\.$#'
+			identifier: argument.type
+			count: 2
+			path: packages/typo3-docs-theme/src/Compiler/NodeTransformers/CollectPrefixLinkTargetsTransformer.php
 
 		-
-			message: "#^Cannot access offset string on mixed\\.$#"
-			count: 1
-			path: packages/typo3-version-handling/src/Packagist/PackagistService.php
+			message: '#^Parameter \#1 \$configs \(array\<int, mixed\>\) of method T3Docs\\Typo3DocsTheme\\DependencyInjection\\Typo3DocsThemeExtension\:\:load\(\) should be contravariant with parameter \$configs \(array\<array\<mixed\>\>\) of method Symfony\\Component\\DependencyInjection\\Extension\\ExtensionInterface\:\:load\(\)$#'
+			identifier: method.childParameterType
+			count: 2
+			path: packages/typo3-docs-theme/src/DependencyInjection/Typo3DocsThemeExtension.php
diff --git a/phpstan.neon b/phpstan.neon
index 94775d0de..86f7c36ef 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,14 +1,11 @@
 includes:
   - phpstan-baseline.neon
-rules:
-  - Symplify\PHPStanRules\Rules\AnnotateRegexClassConstWithRegexLinkRule
-  - Symplify\PHPStanRules\Rules\RegexSuffixInRegexConstantRule
 parameters:
   phpVersion: 80100
   level: max
   strictRules:
     allRules: false
-    strictCalls: true
+    strictFunctionCalls: true
     requireParentConstructorCall: true
   inferPrivatePropertyTypeFromConstructor: true
   treatPhpDocTypesAsCertain: false