I'd love to see more tools which I came across during the last months being added to phpcq:

• Security check
  We should provide a tool to check against the database of known security vulnerabilities. I prefer using
  https://github.com/sensiolabs/security-checker instead of https://github.com/Ocramius/security-advisories
  here as the last mentioned causes randomly some issues on composer update.
• PHPStan
  PHPStan focuses on finding errors in your code without actually running it. It catches whole classes of bugs even before you write tests for the code.
  https://github.com/phpstan/phpstan
• Backward Compatibility Check
  The backward compatibility check would help to detect bc breaks in userland code.
  https://github.com/Roave/BackwardCompatibilityCheck
• Composer require checker
  A CLI tool to analyze composer dependencies and verify that no unknown symbols are used in the sources of a package. This will prevent you from using "soft" dependencies that are not defined within your composer.json require section.https://github.com/maglnet/ComposerRequireChecker

We should check how we could add this tools to our chain. The last one, f.e. is not installable by composer. But I think it would inc