Spec-driven development (SDD) is presented as a structured alternative to vibe coding for AI-assisted software projects. Four tools are examined: Kiro (an AWS IDE/CLI that generates requirements, design, and task markdown files using EARS notation), Spec Kit (an open-source Microsoft toolkit with slash commands for coding agents like Copilot and Claude Code), Tessl (a framework and package registry that uses MCP to keep agents on track with skills, docs, and rules), and Zenflow (a multi-agent orchestration platform with built-in verification and parallel task execution). The post argues that vibe coding is acceptable for throwaway projects but creates technical debt and hidden bugs at scale, while SDD provides the structure needed for large features and enterprise work.
