Cal built a user-configurable auto-collapse feature for large diffs in the BloopAI/vibe-kanban repository, focusing on improving readability and performance during code review. Leveraging React and Rust, Cal implemented controls that allow users to set default collapse types and specify maximum line counts, reducing rendering workload for extensive diffs. The solution introduced a maintainable configuration surface, enabling flexible user preferences while preserving UI clarity. All changes were delivered in a focused, traceable commit linked to the relevant issue, demonstrating a methodical approach to feature-driven development. This work reflects depth in front end and full stack engineering with attention to user experience.