Worked on enhancing the Stylex ESLint plugin within the facebook/stylex repository by introducing support for the :empty pseudo-class, enabling linting rules for empty selectors in CSS. This feature expanded the plugin’s ability to recognize both the :empty pseudo-class and related at-rules, improving standards compliance and developer tooling for front end development. The implementation focused on refining linting logic using JavaScript and CSS, ensuring that code quality checks now cover a broader range of selector patterns. Over the course of one month, contributed a targeted feature that addressed a specific gap in linting coverage, with an emphasis on maintainable, standards-driven code.