Worked on the sinelaw/fresh repository to enhance rendering stability in Rust-based back end systems, focusing on scenarios where cursors are hidden. Addressed a critical bug that caused panics by refining the rendering logic in split_rendering.rs, ensuring that empty cursor positions no longer trigger crashes. Introduced a targeted regression test to catch similar issues early, improving overall test coverage and reliability. Expanded integration test capabilities by exposing plugin command handling, which supports robust end-to-end validation for plugin-driven workflows. The work emphasized careful risk reduction and maintainability, leveraging Rust’s safety features and back end development best practices throughout the process.