The author, a developer, returned from baby bonding leave to a rapidly changing AI landscape, particularly agent skills. Agent skills, collections of instructions for AI agents, sparked a rethinking of a previous project, the Angular AI Tutor. The tutor teaches Angular interactively, initially built with a simple rules file and Gemini. However, the project faced challenges in lesson continuity and syntax recency as it evolved into an interactive product. The tutor's logic was tightly coupled, hindering reusability and making updates difficult. A proposed solution, a Router + Building Blocks architecture, aimed to create modular, reusable components for the tutor. The author now sees Agent Skills as the potential vehicle for this vision of Context Pipeline Engineering. The author questions the extensibility, reliability, token optimization, and stability of these systems. Ultimately, the author considers the deeper, structural questions about AI engineering. The author calls this discipline Context Pipeline Engineering and invites others to join the exploration. The article concludes with the author's excitement about returning to work and building new things.