Worked on the chatmail/core repository to enhance backend reliability and documentation clarity using Rust and Markdown. Focused on resolving two critical bugs, addressing both user-facing and system stability concerns. Improved documentation by fixing a broken PGP/MIME link, ensuring users have accurate guidance for secure messaging workflows. Strengthened transport management by implementing a restart of IO operations upon transport deletion, reducing the risk of IO stalls and potential outages. Emphasized technical writing and backend development skills to deliver targeted improvements that reduce user confusion, lower support overhead, and create more maintainable code paths for ongoing development and operational stability.