Spec-Driven Development

Overview

SDD makes specifications the source of truth — code serves specs, not the other way around. Instead of prompting an AI with vague descriptions and hoping for the right output, you define precise specifications first, then let AI generate code strictly constrained by them.

Without a spec, AI makes thousands of micro-decisions silently. With a spec, those decisions are made by you — explicitly, before any code is written, which is what turns a pivot into a systematic regeneration rather than a manual rewrite.

Quick Start