diff --git a/.github/workflows/rector-cs.yml b/.github/workflows/rector-cs.yml
new file mode 100644
index 0000000..cc20f03
--- /dev/null
+++ b/.github/workflows/rector-cs.yml
@@ -0,0 +1,26 @@
+name: Rector + PHP CS Fixer
+
+on:
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'tests/**'
+      - '.github/workflows/rector-cs.yml'
+      - 'composer.json'
+      - 'rector.php'
+      - '.php-cs-fixer.dist.php'
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  rector-cs:
+    permissions:
+      contents: write  # Required to commit formatting fixes back to the PR
+    uses: yiisoft/actions/.github/workflows/rector-cs.yml@master
+    with:
+      php: '7.4'
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..0e03959
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Finder;
+use PhpCsFixer\Runner\Parallel\ParallelConfigFactory;
+use Yiisoft\CodeStyle\ConfigBuilder;
+
+$finder = (new Finder())->in([
+    __DIR__ . '/src',
+    __DIR__ . '/tests',
+]);
+
+return ConfigBuilder::build()
+    ->setCacheFile(__DIR__ . '/runtime/.php-cs-fixer.cache')
+    ->setRiskyAllowed(true)
+    ->setParallelConfig(ParallelConfigFactory::detect())
+    ->setRules([
+        '@Yiisoft/Core' => true,
+        '@Yiisoft/Core:risky' => true,
+    ])
+    ->setFinder($finder);
diff --git a/.styleci.yml b/.styleci.yml
deleted file mode 100644
index 1ab379b..0000000
--- a/.styleci.yml
+++ /dev/null
@@ -1,85 +0,0 @@
-preset: psr12
-risky: true
-
-version: 8.1
-
-finder:
-  exclude:
-    - docs
-    - vendor
-
-enabled:
-  - alpha_ordered_traits
-  - array_indentation
-  - array_push
-  - combine_consecutive_issets
-  - combine_consecutive_unsets
-  - combine_nested_dirname
-  - declare_strict_types
-  - dir_constant
-  - fully_qualified_strict_types
-  - function_to_constant
-  - hash_to_slash_comment
-  - is_null
-  - logical_operators
-  - magic_constant_casing
-  - magic_method_casing
-  - method_separation
-  - modernize_types_casting
-  - native_function_casing
-  - native_function_type_declaration_casing
-  - no_alias_functions
-  - no_empty_comment
-  - no_empty_phpdoc
-  - no_empty_statement
-  - no_extra_block_blank_lines
-  - no_short_bool_cast
-  - no_superfluous_elseif
-  - no_unneeded_control_parentheses
-  - no_unneeded_curly_braces
-  - no_unneeded_final_method
-  - no_unset_cast
-  - no_unused_imports
-  - no_unused_lambda_imports
-  - no_useless_else
-  - no_useless_return
-  - normalize_index_brace
-  - php_unit_dedicate_assert
-  - php_unit_dedicate_assert_internal_type
-  - php_unit_expectation
-  - php_unit_mock
-  - php_unit_mock_short_will_return
-  - php_unit_namespaced
-  - php_unit_no_expectation_annotation
-  - phpdoc_no_empty_return
-  - phpdoc_no_useless_inheritdoc
-  - phpdoc_order
-  - phpdoc_property
-  - phpdoc_scalar
-  - phpdoc_singular_inheritdoc
-  - phpdoc_trim
-  - phpdoc_trim_consecutive_blank_line_separation
-  - phpdoc_type_to_var
-  - phpdoc_types
-  - phpdoc_types_order
-  - print_to_echo
-  - regular_callable_call
-  - return_assignment
-  - self_accessor
-  - self_static_accessor
-  - set_type_to_cast
-  - short_array_syntax
-  - short_list_syntax
-  - simplified_if_return
-  - single_quote
-  - standardize_not_equals
-  - ternary_to_null_coalescing
-  - trailing_comma_in_multiline_array
-  - unalign_double_arrow
-  - unalign_equals
-  - empty_loop_body_braces
-  - integer_literal_case
-  - union_type_without_spaces
-
-disabled:
-  - function_declaration
diff --git a/composer.json b/composer.json
index f3ae4dc..1d99a92 100644
--- a/composer.json
+++ b/composer.json
@@ -32,10 +32,13 @@
         "yiisoft/mutex": "^1.1"
     },
     "require-dev": {
+        "friendsofphp/php-cs-fixer": "^3.95",
         "phpunit/phpunit": "^9.6.35",
+        "rector/rector": "^2.5",
         "roave/infection-static-analysis-plugin": "^1.16",
         "spatie/phpunit-watcher": "^1.23",
-        "vimeo/psalm": "^4.30 || ^5.26.1 || ^6.16.1"
+        "vimeo/psalm": "^4.30 || ^5.26.1 || ^6.16.1",
+        "yiisoft/code-style": "^1.1"
     },
     "autoload": {
         "psr-4": {
@@ -55,8 +58,10 @@
         }
     },
     "scripts": {
+        "cs-fix": "php-cs-fixer fix",
+        "psalm": "psalm",
+        "rector": "rector",
         "test": "phpunit --testdox --no-interaction",
-        "test-watch": "phpunit-watcher watch",
-        "psalm": "psalm"
+        "test-watch": "phpunit-watcher watch"
     }
 }
diff --git a/rector.php b/rector.php
new file mode 100644
index 0000000..95a47a0
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Yiisoft\CodeStyle\Rector\SetList;
+
+return RectorConfig::configure()
+    ->withPaths([
+        __DIR__.'/src',
+        __DIR__.'/tests',
+    ])
+    ->withPhp74Sets()
+    ->withSets([
+        SetList::YII_CORE,
+    ]);
diff --git a/runtime/.gitignore b/runtime/.gitignore
new file mode 100644
index 0000000..d6b7ef3
--- /dev/null
+++ b/runtime/.gitignore
@@ -0,0 +1,2 @@
+*
+!.gitignore