Tag: contract testing

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Spec-driven development: roles and responsibilities

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Spec-driven development treats a structured specification—not the codebase—as the system of record. This post maps who does what when you work that way: from turning product intent into an agent-readable spec, through API contracts and UI rules, to validation that implementation still matches what you wrote down. Table of contents Overview Spec-driven development (SDD) is […]

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Spec-First, Spec-Anchored, Spec-as-Truth: The Three Levels of Spec-Driven Development

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A practitioner’s guide to knowing which one you actually need. “Spec-driven” is not one practice. It is a ladder—spec-first (write then ship, spec often rots), spec-anchored (spec and code stay checked in CI), and spec-as-truth / spec-as-source (humans edit only the spec; code is generated). This piece maps the three levels (after Birgitta Böckeler on martinfowler.com), their tradeoffs, a cheat sheet, and […]

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