Worked on the udecode/plate repository to enhance list numbering reliability in rich text editing and document export workflows. Focused on refining how listStart values are assigned, ensuring that numbering resumes correctly after unordered list items and that listStart applies only to ordered lists. Used TypeScript for both implementation and comprehensive test coverage, expanding scenarios across core, web, and integration layers to address edge cases in docx paste and nested list handling. Improved test scaffolding and documentation alignment, validating changes across editing, import, and rendering paths. This work established a more consistent and maintainable foundation for future list-related features.