app.build serves as a reference architecture designed to facilitate the creation of AI-native systems, offering a robust framework for generating complete applications equipped with real backends, databases, testing, and automated deployments. It addresses the limitations of current AI coding tools that prioritize speed over coherence and tackles the challenges of demo-driven development and frontend bias by focusing on backend data modeling and transaction handling. Initially built with a constrained stack of TypeScript, React, Fastify, Drizzle, and tRPC to ensure reliability, app.build is evolving to support multiple languages and frameworks, such as Python with FastAPI and NiceGUI, and PHP with Laravel, therefore promoting stack agnosticism. By leveraging Neon’s backend, app.build aims to bridge the gap between code generation and production-ready software by ensuring that generated applications are tested, deployed, and capable of handling real-world demands, ultimately teaching AI agents to produce software you can actually ship rather than just writing code.