Spec-Driven Development ↗

Editorial Notes

Start here for the foundational definition. SDD is a methodology where machine-readable specifications serve as the single source of truth, from which implementation, tests, and documentation are derived. The concept predates AI-assisted coding but has been fundamentally reinvigorated by LLM workflows, where structured specifications dramatically reduce hallucination and misalignment. Understanding this definition is essential before diving into the practical guides and tooling in the rest of this source.