Aggelos Bellos contributed to the JetBrains/phpstorm-stubs repository by addressing a documentation issue related to PHP 8.0 compatibility. He restored the documented availability of the DOMNode methods compareDocumentPosition and isEqualNode, ensuring that developers using PHP 8.0 and above receive accurate information. By removing the misleading @removed tag from these methods, Aggelos clarified their status and reduced potential confusion for users. His work focused on PHP and documentation skills, with careful attention to detail in code comments and versioning. While the scope was limited to a single bug fix, the update improved the reliability of the repository’s PHP stubs documentation.