Specification-Driven Development: How to Stop Vibe Coding and Actually Ship Production-Ready AI-Generated Code

A complete engineering guide to Specification-Driven Development (SDD) — the structured methodology that replaces vibe coding with spec files, test-first workflows, and systematic AI agent orchestration. Covers the four-phase SDD loop, real-world CLAUDE.md and cursor rules examples, TDD integration with AI agents, failure pattern analysis, and production-grade workflows that turn AI coding tools from lottery tickets into reliable engineering multipliers.