Introduction Modern .NET applications are increasingly distributed, integrating APIs, background services, and external AI systems. With the rise of AI coding tools such as GitHub Copilot and frameworks like the Microsoft Agent Framework, developers can now generate large portions of application logic. This raises a question: When AI can generate much of the code, what becomes the core responsibility of a .NET developer? This article will answer you the above question by sharing a practical case study of that shift—highlighting how architecture, contracts, and observability via Aspire - As systems become more dynamic and AI-driven, observability and orchestration become just as important as implementation.…