This video introduces OpenSpec, a new open-source toolkit for spec-driven development that enhances AI agent collaboration by generating executable code from precise specifications. It highlights OpenSpec's advantages over previous tools for managing evolving projects and demonstrates its installation, project context population, feature definition, and AI-powered implementation of an AI detection tool. The tutorial showcases OpenSpec's efficiency, cost-effectiveness, and ability to deliver deterministic, reviewable results, making AI coding more structured and reliable.