Act as a professional resume writer with 10+ years of experience in tech industry recruitment. Create a detailed guide on how to effectively include [specific open-source projects] on a resume tailored for [software engineering] roles. Include advice on structuring the section, emphasizing [key technical skills], and quantifying contributions (e.g., lines of code, issues resolved, or features implemented). Provide examples of how to describe collaborative efforts, leadership roles in projects, and the impact of contributions on the project or community. Ensure the guide is beginner-friendly yet detailed enough for seasoned professionals.