Spec-Driven Development Overview Most AI coding failures happen because the agent starts coding before understanding the problem. Spec-driven development reverses the flow: first write a detailed specification that describes what to build, why, and how — then validate the spec — then implement. The spec becomes both the contract and the test oracle. When to Use - Starting a new feature and want to think before coding - Building something complex where wrong assumptions are expensive - Working in a team where others need to review the design before implementation - The agent keeps building the…