Worked on the yorkie-js-sdk repository to enhance correctness and performance in CRDT array handling by introducing a specialized SplayTree FindForArray method. This approach separated the logic for text and array CRDTs, ensuring that removed nodes were not returned and preserving the intended semantics of array operations. Addressed a semantics bug in SplayTree Find for CRDT arrays, which reduced incorrect node returns and minimized offset edge cases. The work also aligned RGATreeList path handling with array semantics to avoid costly scans after deletions. Utilized TypeScript, algorithm optimization, and data structures to deliver these targeted improvements within the codebase.