Developed a user-configurable auto-collapse feature for large diffs in the BloopAI/vibe-kanban repository, focusing on improving readability and performance during code review. The solution introduced controls for default collapse types and maximum line counts, allowing users to tailor the diff viewing experience to their preferences. Leveraging React for front end development and Rust for performance-oriented logic, the implementation reduced rendering workload and enhanced user experience when handling extensive diffs. The work emphasized maintainable configuration surfaces and clear change traceability, with all updates linked to a focused feature commit and corresponding issue, reflecting a methodical and feature-driven development approach.