Worked on targeted improvements in open source projects, focusing on maintainability and compatibility. In the bitcoin/bitcoin repository, clarified mempool transaction handling policy by updating documentation, removing outdated rationale, and aligning with recent policy changes to improve onboarding and reduce confusion. Later, addressed a dependency issue in symfony/symfony by delivering a patch that removed conflicts with Doctrine DBAL versions below 4.3, ensuring compatibility with newer releases and supporting smoother upgrades for downstream projects. Utilized PHP, Markdown, and Symfony, applying skills in back end development, database management, and policy writing to enhance project stability and documentation clarity over two months.