01 / Introduction

Start with a blueprint.

AI can write code quickly. A specification helps it build the right thing.

Spec-driven development starts by describing what a system should do, the constraints it must respect, and how success will be checked. That shared blueprint guides the agent’s work and gives people a clear basis for reviewing it.

This short visual guide explores one idea at a time. Start with intent, make it concrete, then check the implementation against it.