Worked on the w3ctag/design-principles repository to deliver an update to the Web Platform Design Principles, focusing on strengthening design governance and reducing risk in platform development. The work emphasized defect mitigation by refining guidelines to avoid APIs based on problematic design patterns and requiring that design flaws be addressed when extending features. Using technical writing skills and expertise in web standards, the update improved documentation clarity and established clearer criteria for API evolution. HTML was used to structure the updated guidance, which aimed to enhance maintainability, support developer onboarding, and increase productivity across the design-principles repository without separate bug-fix releases.