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Test-First Copilot - Greenfield Edition (.NET and React): Crafting provably high quality software using Github Copilot
This book is 100% completeLast updated on 2026-02-25
What if AI could become a disciplined coding partner instead of a chaotic autocomplete machine?
In this hands-on journey, you’ll watch a full-stack .NET + React app take shape as test-first thinking, the C4 model, and the test pyramid systematically guide Copilot from vague suggestions to reliable collaboration.
If you want to stay in control, sharpen your engineering instincts, and finally make AI-assisted development work for you - not against you - this book shows you how!
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About
About the Book
Most developers agree: One-shot prompts aren’t a dependable way to code with AI.
But what if test-first thinking gave you a systematic way to guide AI and tame its wild imaginations, while you still actively use and hone your engineering skills?
In this book, you’ll watch us systematically use Copilot as we build a slice of a full-stack .NET+ React app from scratch, using 3 good engineering practices as our strategy: test-first thinking, C4 model and the test pyramid.
We move from requirements to architecture diagrams to tests to backend code to frontend UI—step by step—so you can see exactly how test-first guidance shapes Copilot into a nearly reliable coding partner. Most importantly, we will use our valuable engineering skills to achieve this.
Before starting the walkthrough of my process, you’ll get a friendly, practical tour of how Copilot really works—where it shines, where it stumbles in funny ways, and how to stay fully in control with clear prompts, tiny steps, and tests that lead the way.
If you’ve been asking yourself questions like:
- How do I get decent results from Copilot instead of wrestling with it?
- Can test-first thinking really keep AI focused and less rogue?
- Where can I learn AI-assisted development by watching a real app come together?
…then this book is for you.
Ready to pragmatically see how to overcome problems while using AI assistants for greenfield development? Let’s dive in.
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About the Author
Kamal Raj Sekar
Kamal Raj Sekar is an AI Consultant & Technical Agile Coach and author of 3 books. He helps organizations become technically agile and leverage AI throughout their engineering processes wherever applicable. Through Ampyard, we provide custom AI workshops tailored to your business context and tech stack.
With 15+ years experience, I've co-created AI products (FaceQuest and Notesally), authored books on TDD and AI-augmented development, and written the white paper 'Real Productivity, Rare Pushbacks' on AI agents. I work with teams from startups to Fortune 500s, helping them ship quality software using proven engineering practices and modern AI tools.
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