The document is a blog post by Matt Harasymczuk about responsible coding. It discusses topics like software development practices, code quality, measuring quality, Agile processes, XP practices, API versioning, software architecture, tools for quality assurance, community engagement, engineering culture, and being a professional. The post emphasizes that quality is important and poor quality can lead to disasters, and advocates practicing techniques like test-driven development, continuous integration, and separation of frontend and backend.