During March 2026, this developer delivered a focused UX feature for the langfuse/langfuse repository, building a Custom Label Management system within Prompts. The work centered on React and front end development, introducing a live search input that filters existing labels and enables inline creation of new ones. By reworking the UI flow and moving label input to a more prominent position, the developer streamlined label handling and reduced user friction. The implementation simplified the interface by removing redundant components while preserving existing production label safeguards. This feature enhanced prompt customization productivity and aligned with product goals around configurable, efficient label management.