The guide focuses on three critical levers of code collaboration: commit frequency, pull request reviews, and merge efficiency. It breaks down each section with research from GitHub's Octoverse, DORA's studies, and field data from high-performing engineering organizations. The guide emphasizes the importance of metrics in bringing clarity to code collaboration, identifying bottlenecks early, and avoiding invisible drag on delivery. It provides concrete ways to tighten feedback loops, cut waste, and raise quality, including measuring commit frequency, reviewing pull requests effectively, and improving merge efficiency. The guide also highlights the importance of automation, lightweight dashboards, and clear guidelines in implementing code review best practices. Additionally, it discusses common issues with commit frequency, such as overcommitting or undercommitting, and provides tips on how to overcome them. The guide concludes by emphasizing the need for continuous improvement, leveraging developer collaboration tools, and embracing pull request best practices to optimize code collaboration and improve delivery velocity.