diff --git a/.gitattributes b/.gitattributes
index 06f47c0..b67aae4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -8,9 +8,10 @@
 /CODE_OF_CONDUCT.md export-ignore
 /deptrac.yaml export-ignore
 /ecs.php export-ignore
-/infection.json.dist export-ignore
+/infection.json export-ignore
 /Makefile export-ignore
 /phpstan.neon export-ignore
 /phpstan-baseline.neon export-ignore
 /phpunit.xml.dist export-ignore
 /rector.php export-ignore
+/castor.php export-ignore
diff --git a/.github/workflows/infection.yml b/.github/workflows/infection.yml
index edf763c..4747edd 100644
--- a/.github/workflows/infection.yml
+++ b/.github/workflows/infection.yml
@@ -1,6 +1,6 @@
 # yaml-language-server: $schema=https://json.schemastore.org/github-workflow
 
-name: "Integrate"
+name: "Infection"
 
 on:
   push:
@@ -18,6 +18,7 @@ jobs:
           php-version: "8.3"
           extensions: "ctype, dom, json, libxml, mbstring, openssl, phar, simplexml, tokenizer, xml, xmlwriter"
           coverage: "xdebug"
+          tools: castor
 
       - name: "Checkout code"
         uses: "actions/checkout@v3"
@@ -32,4 +33,4 @@ jobs:
           composer-options: "--optimize-autoloader"
 
       - name: "Execute Infection"
-        run: "make ci-mu"
+        run: "castor infect --ci"
diff --git a/.github/workflows/integrate.yml b/.github/workflows/integrate.yml
index 2b186f2..baae9ba 100644
--- a/.github/workflows/integrate.yml
+++ b/.github/workflows/integrate.yml
@@ -68,6 +68,7 @@ jobs:
         with:
           php-version: "${{ matrix.php-version }}"
           extensions: "ctype, dom, json, libxml, mbstring, openssl, phar, simplexml, tokenizer, xml, xmlwriter"
+          tools: castor
           coverage: "xdebug"
 
       - name: "Checkout code"
@@ -80,7 +81,7 @@ jobs:
           composer-options: "--optimize-autoloader"
 
       - name: "Execute tests (PHP)"
-        run: "make ci-cc"
+        run: "castor test --coverage-text"
 
   #      - name: Send coverage to Coveralls
   #        if: "matrix.php-version == '8.1' && matrix.dependencies == 'highest'"
@@ -102,13 +103,14 @@ jobs:
         with:
           php-version: "8.3"
           extensions: "ctype, dom, json, libxml, mbstring, openssl, phar, simplexml, tokenizer, xml, xmlwriter"
+          tools: castor
           coverage: "none"
 
       - name: "Checkout code"
         uses: "actions/checkout@v3"
 
       - name: "Validate Composer configuration"
-        run: "composer validate --strict"
+        run: "castor validate"
 
       - name: "Install dependencies"
         uses: "ramsey/composer-install@v3"
@@ -116,11 +118,8 @@ jobs:
           dependency-versions: "highest"
           composer-options: "--optimize-autoloader"
 
-      - name: "Check PSR-4 mapping"
-        run: "composer dump-autoload --optimize --strict-psr"
-
       - name: "Execute static analysis"
-        run: "make st"
+        run: "castor stan"
 
   coding_standards:
     name: "4️⃣ Coding Standards"
@@ -134,6 +133,7 @@ jobs:
         with:
           php-version: "8.3"
           extensions: "ctype, dom, json, libxml, mbstring, openssl, phar, simplexml, tokenizer, xml, xmlwriter"
+          tools: castor
           coverage: "none"
 
       - name: "Checkout code"
@@ -146,11 +146,36 @@ jobs:
           composer-options: "--optimize-autoloader"
 
       - name: "Check coding style"
-        run: "make ci-cs"
+        run: "castor cs"
 
       - name: "Deptrac"
-        run: |
-          vendor/bin/deptrac analyse --fail-on-uncovered --no-cache
+        run: 'castor deptrac'
+
+  check_licenses:
+    name: "5️⃣ Check Licenses"
+    needs:
+      - "byte_level"
+      - "syntax_errors"
+    runs-on: "ubuntu-latest"
+    steps:
+      - name: "Set up PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          php-version: "8.3"
+          extensions: "ctype, dom, json, libxml, mbstring, openssl, phar, simplexml, tokenizer, xml, xmlwriter"
+          tools: castor
+
+      - name: "Checkout code"
+        uses: "actions/checkout@v3"
+
+      - name: "Install dependencies"
+        uses: "ramsey/composer-install@v3"
+        with:
+          dependency-versions: "highest"
+          composer-options: "--optimize-autoloader"
+
+      - name: "Execute license check"
+        run: "castor check-licenses"
 
   rector_checkstyle:
     name: "6️⃣ Rector Checkstyle"
@@ -164,6 +189,7 @@ jobs:
         with:
           php-version: "8.3"
           extensions: "ctype, dom, json, libxml, mbstring, openssl, phar, simplexml, tokenizer, xml, xmlwriter"
+          tools: castor
           coverage: "xdebug"
 
       - name: "Checkout code"
@@ -179,7 +205,7 @@ jobs:
           composer-options: "--optimize-autoloader"
 
       - name: "Execute Rector"
-        run: "make rector"
+        run: "castor rector"
 
   exported_files:
     name: "7️⃣ Exported files"
diff --git a/.gitignore b/.gitignore
index 8da2f5c..ec1249c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ yarn-error.log
 /composer.lock
 /vendor
 infection.txt
+/.castor.stub.php
diff --git a/castor.php b/castor.php
new file mode 100644
index 0000000..8123e27
--- /dev/null
+++ b/castor.php
@@ -0,0 +1,178 @@
+<?php
+
+declare(strict_types=1);
+
+use Castor\Attribute\AsTask;
+use function Castor\io;
+use function Castor\run;
+
+#[AsTask(description: 'Run mutation testing')]
+function infect(int $minMsi = 0, int $minCoveredMsi = 0, bool $ci = false): void
+{
+    io()->title('Running infection');
+    $nproc = run('nproc', quiet: true);
+    if (! $nproc->isSuccessful()) {
+        io()->error('Cannot determine the number of processors');
+        return;
+    }
+    $threads = (int) $nproc->getOutput();
+    $command = [
+        'php',
+        'vendor/bin/infection',
+        sprintf('--min-msi=%s', $minMsi),
+        sprintf('--min-covered-msi=%s', $minCoveredMsi),
+        sprintf('--threads=%s', $threads),
+    ];
+    if ($ci) {
+        $command[] = '--logger-github';
+        $command[] = '-s';
+    }
+    $environment = [
+        'XDEBUG_MODE' => 'coverage',
+    ];
+    run($command, environment: $environment);
+}
+
+#[AsTask(description: 'Run tests')]
+function test(bool $coverageHtml = false, bool $coverageText = false, null|string $group = null): void
+{
+    io()->title('Running tests');
+    $command = ['php', 'vendor/bin/phpunit', '--color'];
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    if ($coverageHtml) {
+        $command[] = '--coverage-html=build/coverage';
+        $environment['XDEBUG_MODE'] = 'coverage';
+    }
+    if ($coverageText) {
+        $command[] = '--coverage-text';
+        $environment['XDEBUG_MODE'] = 'coverage';
+    }
+    if ($group !== null) {
+        $command[] = sprintf('--group=%s', $group);
+    }
+    run($command, environment: $environment);
+}
+
+#[AsTask(description: 'Coding standards check')]
+function cs(bool $fix = false): void
+{
+    io()->title('Running coding standards check');
+    $command = ['php', 'vendor/bin/ecs', 'check'];
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    if ($fix) {
+        $command[] = '--fix';
+    }
+    run($command, environment: $environment);
+}
+
+#[AsTask(description: 'Running PHPStan')]
+function stan(): void
+{
+    io()->title('Running PHPStan');
+    $command = ['php', 'vendor/bin/phpstan', 'analyse'];
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    run($command, environment: $environment);
+}
+
+#[AsTask(description: 'Validate Composer configuration')]
+function validate(): void
+{
+    io()->title('Validating Composer configuration');
+    $command = ['composer', 'validate', '--strict'];
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    run($command, environment: $environment);
+
+    $command = ['composer', 'dump-autoload', '--optimize', '--strict-psr'];
+    run($command, environment: $environment);
+}
+
+/**
+ * @param array<string> $allowedLicenses
+ */
+#[AsTask(description: 'Check licenses')]
+function checkLicenses(
+    array $allowedLicenses = ['Apache-2.0', 'BSD-2-Clause', 'BSD-3-Clause', 'ISC', 'MIT', 'MPL-2.0', 'OSL-3.0']
+): void {
+    io()->title('Checking licenses');
+    $allowedExceptions = [];
+    $command = ['composer', 'licenses', '-f', 'json'];
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    $result = run($command, environment: $environment, quiet: true);
+    if (! $result->isSuccessful()) {
+        io()->error('Cannot determine licenses');
+        exit(1);
+    }
+    $licenses = json_decode($result->getOutput(), true);
+    $disallowed = array_filter(
+        $licenses['dependencies'],
+        static fn (array $info, $name) => ! in_array($name, $allowedExceptions, true)
+            && count(array_diff($info['license'], $allowedLicenses)) === 1,
+        \ARRAY_FILTER_USE_BOTH
+    );
+    $allowed = array_filter(
+        $licenses['dependencies'],
+        static fn (array $info, $name) => in_array($name, $allowedExceptions, true)
+            || count(array_diff($info['license'], $allowedLicenses)) === 0,
+        \ARRAY_FILTER_USE_BOTH
+    );
+    if (count($disallowed) > 0) {
+        io()
+            ->table(
+                ['Package', 'License'],
+                array_map(
+                    static fn ($name, $info) => [$name, implode(', ', $info['license'])],
+                    array_keys($disallowed),
+                    $disallowed
+                )
+            );
+        io()
+            ->error('Disallowed licenses found');
+        exit(1);
+    }
+    io()
+        ->table(
+            ['Package', 'License'],
+            array_map(
+                static fn ($name, $info) => [$name, implode(', ', $info['license'])],
+                array_keys($allowed),
+                $allowed
+            )
+        );
+    io()
+        ->success('All licenses are allowed');
+}
+
+#[AsTask(description: 'Run Rector')]
+function rector(bool $fix = false): void
+{
+    io()->title('Running Rector');
+    $command = ['php', 'vendor/bin/rector', 'process', '--ansi'];
+    if (! $fix) {
+        $command[] = '--dry-run';
+    }
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    run($command, environment: $environment);
+}
+
+#[AsTask(description: 'Run Rector')]
+function deptrac(): void
+{
+    io()->title('Running Rector');
+    $command = ['php', 'vendor/bin/deptrac', 'analyse', '--fail-on-uncovered', '--no-cache'];
+    $environment = [
+        'XDEBUG_MODE' => 'off',
+    ];
+    run($command, environment: $environment);
+}
diff --git a/ecs.php b/ecs.php
index 2d4767b..233deaf 100644
--- a/ecs.php
+++ b/ecs.php
@@ -87,6 +87,12 @@
     $config->parallel();
     $config->paths([__DIR__]);
     $config->skip(
-        [__DIR__ . '/.github', __DIR__ . '/build', __DIR__ . '/vendor', PhpUnitTestClassRequiresCoversFixer::class]
+        [
+            __DIR__ . '/.github',
+            __DIR__ . '/build',
+            __DIR__ . '/vendor',
+            __DIR__ . '/.castor.stub.php',
+            PhpUnitTestClassRequiresCoversFixer::class,
+        ]
     );
 };
diff --git a/infection.json.dist b/infection.json
similarity index 100%
rename from infection.json.dist
rename to infection.json