Leandro enhanced governance and testing workflows across the decentraland/adr and decentraland/js-sdk-toolchain repositories. He improved the Architectural Decision Records process by evolving it into a living lifecycle and expanded ADR-239 with practical examples and clarifications for avatar assembly, getHides, forceRender, and wearables coverage. Using TypeScript and Markdown, he focused on technical writing and standards compliance to reduce onboarding friction and clarify project documentation. In parallel, Leandro re-enabled and updated snapshot testing in JavaScript, ensuring test integrity and performance tracking. His work established clearer governance, improved documentation, and strengthened release confidence through robust testing and process improvements.