Spec Driven Development Book

Spec-Driven Development

Shipping Production Software with AI Agents.

A complete, practitioner's book on Spec-Driven Development (SDD) — the method that
shipped a 13-app crypto fintech to production in 70 days, solo, with AI agents.
Written in Markdown, shipped as a print-ready PDF and a reflowable EPUB, in
English and Brazilian Portuguese. Comes with a ready-to-use SDD kit for Claude Code.

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The SDD Kit
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Table of contents

- About
- What you'll learn
- Contents
- The SDD Kit
- Getting started
- Repository layout
- Who it's for
- Contributing
- License
- Contact
- Acknowledgments

About

AI coding agents are fast, and stateless. They generate code at a speed that was
science fiction five years ago — and then reinvent your decisions on every run,
because they have no memory between sessions. Speed was never the problem.
Direction is.

Spec-Driven Development (SDD) is the fix: you write and approve a structured
specification before any code is generated, and that spec stays the source of
truth the agent builds from. The code becomes a consequence of the spec, not the
other way around. This book is the whole method — from the first requirement to
production code — taught by building a complete application, TaskFlow Pro,
with every specification written in front of you.

It is not a vendor pitch or a workshop toy. Part IV walks through a real
production build: 13 apps, 3 APIs, real money, real compliance, shipped solo in
70 days — with the honest limits stated as carefully as the results.

Built with

Typst ·
book-kit ·
Mermaid ·
Agent Skills

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What you'll learn

- The method — why the problem is memory, not intelligence; the IDEA → PLAN
  → REQUIREMENTS → DESIGN → TASKS → IMPLEMENTATION →…