Worked on the facebook/lexical repository to address a stability issue in the Lexical-markdown package, focusing on preventing unintended node removal during transformation processes. Using TypeScript and leveraging skills in bug fixing, Markdown, and testing, implemented a targeted solution ensuring that nodes are only removed when the replacement function explicitly indicates so, thereby reducing the risk of data loss. Developed and integrated comprehensive tests to verify the non-destructive behavior of these transformations, which improved the reliability and stability of the editor’s core functionality. The work emphasized careful validation and maintenance of existing features while enhancing transformation logic robustness.