- 0 — Why SDD Is Essential in the AI Era
- 1 — Fundamentals: Where SDD Comes From
- 2 — The Anatomy of a Specification
- 3 — Getting to Work: The SDD Tools
- 4 — speckit constitution: The Rules Before the First Move
- 5 — The Complete SDD Cycle
- 6 — Create and List Tasks: The First Complete Loop
- 6.5 — Creating and Listing Tasks in Practice: the Whole Loop, File by File
- 7 — Completing a Task: When the Obvious Hides Decisions
- 7.5 — Completing and Reopening a Task in Practice: the Whole Loop, File by File
- 8 — Filtering Tasks: The Spotlight on plan and checklist
- 8.5 — Filtering Tasks in Practice: the Whole Loop, File by File
- 9 — Deleting a Task: The Spotlight on tasks and analyze
- 9.5 — Deleting a Task in Practice: the Whole Loop, File by File
- 10 — Edit Task: The Spotlight on implement
- 10.5 — Editing a Task in Practice: the Whole Loop, File by File
- 11 — The Whole App Was Born From Five Loops
- Canonical Glossary
Spec Driven Development
From vibe-coding to software engineering
This book is 100% completeLast updated on 2026-06-29
AI can write code faster than you can read it—so why do projects still derail? The answer is the spec. This book teaches Spec-Driven Development hands-on, building a complete app one loop at a time with Spec Kit. Stop prompting and praying. Start shipping software AI actually gets right.
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About the Book
SDD: Spec-Driven Development in the Age of AI
Artificial intelligence can already write code in seconds. The problem is that plausible-looking code isn't the same as correct code; those who simply fire off impromptu prompts end up with systems no one understands, skyrocketing AI bills, and results that break the moment they encounter an edge case.
This book teaches the method that puts you back in the driver's seat: SDD (Spec-Driven Development). The concept is simple yet powerful: you clearly describe what you want before asking for the code, so the AI works against a clear contract rather than guessing your intentions.
What you will learn:
- What SDD is and why it has become essential now that AI has lowered the cost of writing code
- The software development fundamentals underpinning the method—from Waterfall and Agile to Clean Architecture, SOLID, and TDD—explained in plain language
- Leading SDD tools on the market, with a focus on the GitHub Spec Kit
- How to write project charters, specifications, plans, and tasks that the AI actually follows
- The full cycle in practice: building a real application from end to end, with every decision explained and justified
Who this is for:
For both beginners who want to truly understand how software is built and experienced developers tired of battling "vibe-coding" and prompts that burn through money without getting anywhere.
By the end, you won't just be using AI to code faster; you'll be using it to build complete, robust applications with clear, maintainable code—knowing exactly what you asked for, why you asked for it, and how to evaluate the output.
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About the Author
J.C.Ködel
I am Júlio César Ködel, a software engineer and solutions architect with over 30 years of experience in software development. Throughout my career, I have developed systems for banks, government agencies, and large corporations, as well as my own products, including apps that have surpassed 10 million downloads. My passion lies in transforming complex technical knowledge into practical, actionable content. Here, you will find courses, e-books, and mentorship programs covering Flutter, software architecture, AI applied to development, software engineering, best practices, productivity, and the creation of scalable products. My goal is to help developers grow beyond mere coding by learning to design robust, sustainable solutions that are ready for the challenges of today's market. If you want to develop software professionally, leveraging modern techniques and insights gained from real-world projects.
This space is for you.
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