diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..2f629c7
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,63 @@
+---
+name: Code style and static analysis
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+permissions:
+  contents: read
+
+jobs:
+  phpstan:
+    name: PHPStan
+    runs-on: ubuntu-latest
+
+    container:
+      image: mohelmrabet/magento-frankenphp:php8.2-fp1.10.1-dev
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run PHPStan
+        uses: mohaelmrabet/magento-php-qa-action@v1
+        with:
+          command: phpstan
+          composer-auth: ${{ format('{{"http-basic":{{"repo.magento.com":{{"username":"{0}","password":"{1}"}}}}}}', secrets.MAGENTO_AUTH_USERNAME, secrets.MAGENTO_AUTH_PASSWORD) }}
+
+  php-cs-fixer:
+    name: PHP-CS-Fixer
+    runs-on: ubuntu-latest
+
+    container:
+      image: mohelmrabet/magento-frankenphp:php8.2-fp1.10.1-dev
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run PHP-CS-Fixer
+        uses: mohaelmrabet/magento-php-qa-action@v1
+        with:
+          command: cs-fixer
+          composer-auth: ${{ format('{{"http-basic":{{"repo.magento.com":{{"username":"{0}","password":"{1}"}}}}}}', secrets.MAGENTO_AUTH_USERNAME, secrets.MAGENTO_AUTH_PASSWORD) }}
+
+  unit-tests:
+    name: PHPUnit
+    runs-on: ubuntu-latest
+
+    container:
+      image: mohelmrabet/magento-frankenphp:php8.2-fp1.10.1-dev
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run PHPUnit
+        uses: mohaelmrabet/magento-php-qa-action@v1
+        with:
+          command: phpunit
+          composer-auth: ${{ format('{{"http-basic":{{"repo.magento.com":{{"username":"{0}","password":"{1}"}}}}}}', secrets.MAGENTO_AUTH_USERNAME, secrets.MAGENTO_AUTH_PASSWORD) }}
+          phpunit-path: ./Test/Unit
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..7540d31
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+$finder = (new PhpCsFixer\Finder())
+    ->in(__DIR__ . '/Console')
+    ->in(__DIR__ . '/Test');
+
+return (new PhpCsFixer\Config())
+    ->setRules([
+        '@PSR12' => true,
+    ])
+    ->setFinder($finder);
diff --git a/.phpstan-bootstrap.php b/.phpstan-bootstrap.php
new file mode 100644
index 0000000..3957bb0
--- /dev/null
+++ b/.phpstan-bootstrap.php
@@ -0,0 +1,18 @@
+<?php
+
+/**
+ * Copyright (c) 2025 Mohamed EL Mrabet
+ * CleatSquad - https://cleatsquad.dev
+ *
+ * This file is part of the CleatSquad_ParallelTestsPlus module.
+ * Licensed under the MIT License. See the LICENSE file in the module root.
+ */
+declare(strict_types=1);
+
+/**
+ * BP is defined at runtime by Magento's app/bootstrap.php; declare it here
+ * so PHPStan can resolve it statically without a real Magento installation.
+ */
+if (!defined('BP')) {
+    define('BP', __DIR__);
+}
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..2a89b74
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,19 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/).
+
+## [1.0.0] - 2025-11-22
+
+### Added
+
+- Initial release.
+- DI override of `Magento\Developer\Console\Command\DevTestsRunCommand` to run
+  developer tests through ParaTest.
+- `--processes` option to set the number of ParaTest worker processes.
+- `--runner` option to select the ParaTest runner (default: `WrapperRunner`).
+- Support for static, unit, integration and integrity test suites.
+
+[1.0.0]: https://github.com/CleatSquad/module-parallel-tests-plus/releases/tag/v1.0.0
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..29446c3
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,46 @@
+# Contributing
+
+Thanks for considering a contribution to `module-parallel-tests-plus`.
+
+## Getting started
+
+```bash
+git clone https://github.com/CleatSquad/module-parallel-tests-plus.git
+cd module-parallel-tests-plus
+composer install
+```
+
+> Resolving `magento/module-developer` requires a valid Magento Marketplace
+> `auth.json` (see the README's Installation section).
+
+## Running the tests
+
+```bash
+composer test
+```
+
+or directly:
+
+```bash
+vendor/bin/phpunit --testsuite unit
+```
+
+## Submitting changes
+
+1. Fork the repository and create a branch from `master`.
+2. Keep changes focused — one topic per pull request.
+3. Add or update unit tests for any behavior change in
+   `Console/DevTestsRunCommand.php`.
+4. Make sure `composer test` passes before opening the PR.
+5. Describe the *why* of the change in the PR description, not just the *what*.
+
+## Reporting bugs
+
+Open an issue at
+https://github.com/CleatSquad/module-parallel-tests-plus/issues with the
+Magento version, PHP version, the command you ran, and the full output.
+
+## Security issues
+
+Do not open a public issue for a security vulnerability — see
+[SECURITY.md](SECURITY.md).
diff --git a/Console/DevTestsRunCommand.php b/Console/DevTestsRunCommand.php
index 3830fe9..3250914 100644
--- a/Console/DevTestsRunCommand.php
+++ b/Console/DevTestsRunCommand.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Copyright (c) 2025 Mohamed EL Mrabet
  * CleatSquad - https://cleatsquad.dev
diff --git a/README.md b/README.md
index 8c6999f..b07b9d0 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,11 @@
 
 A Magento 2 extension that enhances the core `dev:tests:run` command by enabling **parallel execution** of developer tests using **ParaTest**.
 
-This module significantly reduces execution time for static, unit, integration and integrity tests — with zero core overrides and full CI/CD compatibility.
+This module significantly reduces execution time for static, unit, integration and integrity tests — via a clean declarative DI override (no core file patching) and full CI/CD compatibility.
 
 ## Badges
 
+[![CI](https://github.com/CleatSquad/module-parallel-tests-plus/actions/workflows/ci.yml/badge.svg)](https://github.com/CleatSquad/module-parallel-tests-plus/actions/workflows/ci.yml)
 [![Latest Stable Version](http://poser.pugx.org/cleatsquad/module-parallel-tests-plus/v)](https://packagist.org/packages/cleatsquad/module-parallel-tests-plus)
 [![Total Downloads](http://poser.pugx.org/cleatsquad/module-parallel-tests-plus/downloads)](https://packagist.org/packages/cleatsquad/module-parallel-tests-plus)
 [![Latest Unstable Version](http://poser.pugx.org/cleatsquad/module-parallel-tests-plus/v/unstable)](https://packagist.org/packages/cleatsquad/module-parallel-tests-plus)
@@ -40,12 +41,14 @@ You can install this module using Composer (recommended) or manually.
 
 ### 🔹 1. Install via Composer (recommended)
 
-Requires Packagist entry:
-
 ```
 composer require cleatsquad/module-parallel-tests-plus --dev
 ```
 
+> **Note:** this package depends on `magento/module-developer`, resolved via
+> `repo.magento.com`. Make sure your project has a valid Magento Marketplace
+> `auth.json` configured, otherwise Composer will fail to resolve it.
+
 Then upgrade Magento:
 
 ```
@@ -111,7 +114,9 @@ bin/magento dev:tests:run integration --processes 2 -c" testsuite/Magento/Catalo
 
 ## 🤝 Support & Contributions
 
-Issues and pull requests are welcome.
+Issues and pull requests are welcome — see [CONTRIBUTING.md](CONTRIBUTING.md).
+For security issues, see [SECURITY.md](SECURITY.md) instead of opening a
+public issue.
 
 GitHub:  
 https://github.com/CleatSquad/module-parallel-tests-plus
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..8fa5e0b
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,18 @@
+# Security Policy
+
+## Supported Versions
+
+Only the latest published `1.x` release is supported with security fixes.
+
+## Reporting a Vulnerability
+
+This module builds and runs a shell command (via `passthru()`) to invoke
+ParaTest. If you find a way to make it execute unintended shell content, or
+any other security issue, please report it privately rather than opening a
+public GitHub issue:
+
+- Email: contact@cleatsquad.dev
+
+Please include a description of the issue, the steps to reproduce it, and
+the Magento/PHP versions involved. We aim to acknowledge reports within a
+few business days.
diff --git a/Test/Unit/Console/DevTestsRunCommandTest.php b/Test/Unit/Console/DevTestsRunCommandTest.php
index 9541823..4413810 100644
--- a/Test/Unit/Console/DevTestsRunCommandTest.php
+++ b/Test/Unit/Console/DevTestsRunCommandTest.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Copyright (c) 2025 Mohamed EL Mrabet
  * CleatSquad - https://cleatsquad.dev
@@ -14,7 +15,6 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Tester\CommandTester;
 
-
 require_once __DIR__ . '/../_files/mock_passthru.php';
 
 /**
diff --git a/Test/Unit/_files/bootstrap.php b/Test/Unit/_files/bootstrap.php
new file mode 100644
index 0000000..bd45520
--- /dev/null
+++ b/Test/Unit/_files/bootstrap.php
@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * Copyright (c) 2025 Mohamed EL Mrabet
+ * CleatSquad - https://cleatsquad.dev
+ *
+ * This file is part of the CleatSquad_ParallelTestsPlus module.
+ * Licensed under the MIT License. See the LICENSE file in the module root.
+ */
+declare(strict_types=1);
+
+require __DIR__ . '/../../../vendor/autoload.php';
+
+/**
+ * DevTestsRunCommand reads Magento's BP constant and app/etc/vendor_path.php.
+ * Outside a real Magento installation (e.g. running this module's own unit
+ * tests standalone), fake a minimal Magento directory layout so the command
+ * can resolve its test directories.
+ */
+$fixtureRoot = sys_get_temp_dir() . '/parallel-tests-plus-fixture';
+
+$testDirs = [
+    'dev/tests/unit',
+    'dev/tests/static/framework/tests/unit',
+    'dev/tests/integration/framework/tests/unit',
+    'dev/tests/integration',
+    'dev/tests/static',
+    'app/etc',
+];
+
+foreach ($testDirs as $relativeDir) {
+    $path = $fixtureRoot . '/' . $relativeDir;
+    if (!is_dir($path)) {
+        mkdir($path, 0777, true);
+    }
+}
+
+file_put_contents($fixtureRoot . '/app/etc/vendor_path.php', "<?php\nreturn 'vendor';\n");
+
+if (!defined('BP')) {
+    define('BP', $fixtureRoot);
+}
diff --git a/Test/Unit/_files/mock_passthru.php b/Test/Unit/_files/mock_passthru.php
index fca66ca..73abdf6 100644
--- a/Test/Unit/_files/mock_passthru.php
+++ b/Test/Unit/_files/mock_passthru.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Copyright (c) 2025 Mohamed EL Mrabet
  * CleatSquad - https://cleatsquad.dev
diff --git a/composer.json b/composer.json
index 233c517..0bad560 100644
--- a/composer.json
+++ b/composer.json
@@ -47,11 +47,21 @@
         "brianium/paratest": "^7.4",
         "magento/module-developer": "^100.4"
     },
+    "require-dev": {
+        "phpunit/phpunit": "^10.5 || ^11.0",
+        "phpstan/phpstan": "^1.0",
+        "friendsofphp/php-cs-fixer": "^3.0"
+    },
     "minimum-stability": "stable",
     "prefer-stable": true,
     "config": {
         "allow-plugins": {
             "magento/composer-dependency-version-audit-plugin": true
         }
+    },
+    "scripts": {
+        "test": "phpunit --testsuite unit",
+        "phpstan": "phpstan analyse",
+        "cs-fixer": "php-cs-fixer fix --dry-run --diff"
     }
 }
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..2108f23
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,6 @@
+parameters:
+    level: 5
+    paths:
+        - Console
+    bootstrapFiles:
+        - .phpstan-bootstrap.php
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..0bebc19
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd"
+         bootstrap="Test/Unit/_files/bootstrap.php"
+         colors="true">
+    <testsuites>
+        <testsuite name="unit">
+            <directory>Test/Unit</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/registration.php b/registration.php
index 6e7ce59..a2a2cad 100644
--- a/registration.php
+++ b/registration.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Copyright (c) 2025 Mohamed EL Mrabet
  * CleatSquad - https://cleatsquad.dev