Worked on the mrdoob/three.js repository, focusing on both documentation and testing infrastructure. Enhanced the documentation to clarify memory reporting behavior after object disposal, ensuring developers understand how internal geometries and textures are retained and reused, which aids in accurate performance profiling and onboarding. Later, implemented a Puppeteer-based testing framework upgrade, enabling automated unit tests to run in both headless and headful browser modes. This expanded test coverage and improved reliability for the Three.js library. The work demonstrated proficiency in JavaScript, Puppeteer, and web development, with a focus on maintainability, developer experience, and robust cross-environment testing strategies.