Pencil is a design tool integrated into the development environment, designed to simplify the process between design and coding, eliminating the tediousness of design handover. With its seamless integration features, users can directly design within the IDE, ensuring consistency between design and code, and accelerating development. Pencil supports importing designs from Figma, uses open file formats, and allows users to manipulate design files with custom tools. Its main focus is to improve engineers' design efficiency and is suitable for various development teams.