Refactor an Existing Codebase using Prompt Driven Development

Learn how to refactor an existing e-commerce codebase with the help of GitHub Copilot. In this video, we’ll walk through a FastAPI + Cosmos DB inventory project, identify code smells, and craft effective Copilot instructions to guide the refactor. You’ll see how to build prompts, run them with Agent Mode, and review the generated code step by step. Finally, we’ll wrap up with key best practices to make AI-assisted refactoring faster, cleaner, and more reliable.

▶️ Check out the full series playlist: https://aka.ms/Prompt-DrivenDevelopme...

🔎 Chapters:
00:00 Intro
00:36 Getting Started
02:25 Choosing our directory - product_crud_batch.py
03:50 Custom Instructions
05:25 Creating our prompt
09:58 Running our prompt with agent mode
19:11 Testing Changes
23:39 In Summary
24:14 Wrap

🔗 Link:
Repo: https://github.com/madebygps/cosmosdb...

🎙️ Featuring: Gwyneth Peña-Siguenza (@madebygps)

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