Kiro is AWS's new AI-powered IDE that introduces a spec-driven development workflow, requiring developers to define requirements and designs before code generation. Unlike traditional AI coding tools that rely on vague prompts, Kiro structures the development process through three phases: requirements, design, and implementation planning. The author tested Kiro by building a retro Tetris game and adding multiplayer functionality, finding that the structured approach produces more reliable results than typical 'vibe coding' sessions. Kiro also features agent hooks for automating repetitive tasks and positions itself more as an engineering assistant than a simple coding copilot.