diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
deleted file mode 100644
index f2fb405..0000000
--- a/.github/FUNDING.yml
+++ /dev/null
@@ -1 +0,0 @@
-github: [smnandre]
\ No newline at end of file
diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index e972665..21c8d6d 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [ "*" ]
+    branches: ["*"]
   pull_request:
-    branches: [ "*" ]
+    branches: ["*"]
   workflow_dispatch:
 
 permissions:
@@ -15,26 +15,17 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-
   cs:
     uses: altophp/.github/.github/workflows/CS.yml@main
-    with:
-      php-version: '8.4'
-      # composer-validate: true
-      # php-cs-fixer-args: '--diff --dry-run'
 
   sa:
     uses: altophp/.github/.github/workflows/SA.yml@main
-    with:
-      php-version: '8.4'
-      # phpstan-args: 'analyse --no-progress --memory-limit=-1'
 
   tests:
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.4', '8.5']
+        php: ["8.4", "8.5"]
     uses: altophp/.github/.github/workflows/tests.yml@main
     with:
       php-version: ${{ matrix.php }}
-      # phpunit-args: '--colors=never'
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
deleted file mode 100644
index d815334..0000000
--- a/CONTRIBUTING.md
+++ /dev/null
@@ -1,32 +0,0 @@
-# Contributing to Alto Code Highlight
-
-Contributions should preserve the public API, escaped output, semantic scopes,
-and deterministic highlighting.
-
-## Prepare a checkout
-
-```bash
-composer install
-composer qa
-```
-
-`composer qa` runs PHP CS Fixer, PHPStan, and PHPUnit. Run coverage separately
-when a change affects executable code:
-
-```bash
-composer coverage
-```
-
-## Propose a change
-
-Add or update tests for observable behavior. Update `docs/` and `CHANGELOG.md`
-when the public contract changes. Keep language aliases, embedded parsing,
-semantic scopes, and generated HTML compatibility explicit.
-
-Documentation preview tooling is maintained in
-[`tools/docs-showcase/`](tools/docs-showcase/README.md). It is contributor
-infrastructure and is not part of the package's public API.
-
-Open a pull request against `main` only after the complete quality gate passes.
-Describe the user-visible result and any compatibility, security, or
-performance impact.
diff --git a/SECURITY.md b/SECURITY.md
deleted file mode 100644
index bf1b62a..0000000
--- a/SECURITY.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# Security policy
-
-Do not report a suspected vulnerability through a public GitHub issue. Email
-[security@altocoda.com](mailto:security@altocoda.com) with the affected
-version, impact, reproduction, and any known mitigation.
-
-Reports are accepted in English or French and handled through coordinated
-disclosure. Avoid including secrets or unrelated personal data.
diff --git a/SUPPORT.md b/SUPPORT.md
deleted file mode 100644
index ce51306..0000000
--- a/SUPPORT.md
+++ /dev/null
@@ -1,10 +0,0 @@
-# Support
-
-Use GitHub issues for reproducible bugs and focused feature proposals. Include
-the PHP and package versions, language identifier, selected theme, minimal
-source input, expected result, and actual result.
-
-Usage questions should include the smallest complete code example and identify
-whether the problem concerns parsing, rendering, embedded languages, or theme
-integration. Do not post security vulnerabilities in a public issue; follow
-the private process in `SECURITY.md`.
diff --git a/composer.json b/composer.json
index 2fc6c1b..607785d 100644
--- a/composer.json
+++ b/composer.json
@@ -38,14 +38,14 @@
         "ext-mbstring": "*",
         "ext-tokenizer": "*"
     },
-    "suggest": {
-        "ext-simplexml": "Required by the optional TextMate theme adapter"
-    },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.94",
         "phpstan/phpstan": "^2.1",
         "phpunit/phpunit": "^12.5"
     },
+    "suggest": {
+        "ext-simplexml": "Required by the optional TextMate theme adapter"
+    },
     "autoload": {
         "psr-4": {
             "Alto\\Code\\Highlight\\": "src/"
@@ -60,6 +60,7 @@
         "sort-packages": true
     },
     "scripts": {
+        "coverage": "vendor/bin/phpunit --coverage-text",
         "cs": "vendor/bin/php-cs-fixer fix --dry-run --diff --sequential",
         "cs:fix": "vendor/bin/php-cs-fixer fix --sequential",
         "docs:capture": "npm --prefix tools/docs-showcase run capture",
@@ -76,7 +77,6 @@
             "@test"
         ],
         "sa": "vendor/bin/phpstan analyse --memory-limit=-1",
-        "test": "phpunit",
-        "coverage": "vendor/bin/phpunit --coverage-text"
+        "test": "phpunit"
     }
 }
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 106e8b7..776ccd8 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -1,5 +1,4 @@
 parameters:
-    level: 10
+    level: max
     paths:
         - src
-    treatPhpDocTypesAsCertain: false
diff --git a/src/CodeParser.php b/src/CodeParser.php
index 576b800..9abfe8b 100644
--- a/src/CodeParser.php
+++ b/src/CodeParser.php
@@ -51,13 +51,7 @@ public function __construct(
         $this->embeddedRegistry = $embeddedRegistry ?? new EmbeddedLanguageRegistry();
 
         $languages ??= Languages::getDefaultLanguages();
-        foreach ($languages as $language) {
-            if (!$language instanceof LanguageInterface) {
-                throw new \InvalidArgumentException('All languages must implement LanguageInterface.');
-            }
-
-            $this->registerLanguage($language);
-        }
+        $this->registerLanguages($languages);
     }
 
     /**
@@ -110,6 +104,20 @@ private function getLanguage(string $identifier): LanguageInterface
         return $this->languages[$identifier];
     }
 
+    /**
+     * @param array<array-key, mixed> $languages
+     */
+    private function registerLanguages(array $languages): void
+    {
+        foreach ($languages as $language) {
+            if (!$language instanceof LanguageInterface) {
+                throw new \InvalidArgumentException('All languages must implement LanguageInterface.');
+            }
+
+            $this->registerLanguage($language);
+        }
+    }
+
     private function parseWithLanguage(LanguageInterface $language, string $code): ParsedStream
     {
         if ($language instanceof EmbeddedLanguageCapable) {
diff --git a/src/Embedded/EmbeddedTrigger.php b/src/Embedded/EmbeddedTrigger.php
index e41d405..2e3b795 100644
--- a/src/Embedded/EmbeddedTrigger.php
+++ b/src/Embedded/EmbeddedTrigger.php
@@ -129,7 +129,7 @@ private static function normalizeAttributeConstraints(array $constraints): array
                 continue;
             }
 
-            $normalized[$key] = array_values($allowedValues);
+            $normalized[$key] = $allowedValues;
         }
 
         return $normalized;
diff --git a/src/Language/CssLanguage.php b/src/Language/CssLanguage.php
index 9ff5b20..d56e9e1 100644
--- a/src/Language/CssLanguage.php
+++ b/src/Language/CssLanguage.php
@@ -371,13 +371,7 @@ protected function getTextBefore(array $tokens): string
             return '';
         }
 
-        $last = end($tokens);
-
-        if (false === $last) {
-            return '';
-        }
-
-        return $last->getText();
+        return $tokens[count($tokens) - 1]->getText();
     }
 
     protected function isPseudoClass(string $text): bool
diff --git a/src/Language/TypeScriptLanguage.php b/src/Language/TypeScriptLanguage.php
index c45c5b3..9e6103b 100644
--- a/src/Language/TypeScriptLanguage.php
+++ b/src/Language/TypeScriptLanguage.php
@@ -651,10 +651,7 @@ private function isRegexContext(array $tokens): bool
             return true;
         }
 
-        $lastToken = end($tokens);
-        if (false === $lastToken) {
-            return true;
-        }
+        $lastToken = $tokens[count($tokens) - 1];
 
         if (Scope::Whitespace === $lastToken->getScope()) {
             for ($i = count($tokens) - 1; $i >= 0; --$i) {