Refactor an Existing Codebase using Prompt Driven Development

Learn how to refactor an existing e-commerce codebase using GitHub Copilot's prompt-driven development approach in this 24-minute tutorial. Walk through a FastAPI and Cosmos DB inventory project to identify code smells and discover how to craft effective Copilot instructions that guide systematic refactoring. Master the process of building targeted prompts, executing them using Agent Mode, and reviewing generated code changes step by step. Explore practical techniques for AI-assisted code improvement while working with a real-world project structure, focusing on the product_crud_batch.py file as a case study. Gain insights into custom instruction creation, prompt engineering best practices, and testing methodologies to ensure refactored code maintains functionality. Conclude with essential best practices that make AI-assisted refactoring faster, cleaner, and more reliable for future development projects.