Spec-Driven Development:From Code to Contract in the Age of AI Coding Assistants
Abstract
The rise of AI coding assistants has reignited interest in an old idea: what if specifications-not code-were the primary artifact of software development? Spec-driven development (SDD) inverts the traditional workflow by treating specifications as the source of truth and code as a generated or verified secondary artifact. This paper provides practitioners with a comprehensive guide to SDD, covering its principles, workflow patterns, and supporting tools. We present three levels of specification rigor-spec-first, spec-anchored, and spec-as-source-with clear guidance on when each applies. Through analysis of tools ranging from Behavior-Driven Development frameworks to modern AI-assisted toolkits like GitHub Spec Kit, we demonstrate how the spec-first philosophy maps to real implementations. We present case studies from API development, enterprise systems, and embedded software, illustrating how different domains apply SDD. We conclude with a decision framework helping practitioners determine when SDD provides value and when simpler approaches suffice.
Keywords
Cite
@article{arxiv.2602.00180,
title = {Spec-Driven Development:From Code to Contract in the Age of AI Coding Assistants},
author = {Deepak Babu Piskala},
journal= {arXiv preprint arXiv:2602.00180},
year = {2026}
}
Comments
Submitted to AIWare 2026. 8 pages, 3 figures