Stop Writing Frontend Types: Building a Backend-Driven Metadata Protocol

(This is Part 5 of my series on building scalable infrastructure. Catch up on Part 1: Bridging Drizzle & TanStack, Part 2: The Engine-Adapter Pattern, Part 3: Dynamic Query Compilers, and Part 4: Cross-Relational Search). 📖 The Chef, The Waiter, and The Menu Imagine running a restaurant. The Chef (your Backend) invents a brand new dish. If your restaurant operates like most tech stacks, the Chef just throws the food out the window. The Waiter (your Frontend) has to catch the food, inspect it, guess what the ingredients are, and write down a manual description for the customer. If the Chef changes the recipe tomorrow, the Waiter serves the wrong description and the customer gets angry. The Smart Way: The Chef prints a Menu (Metadata). When the dish changes, the Menu changes automatically. The Waiter just reads the Menu. 🛑 The Problem: The Type-Sync Hell If you are a full-stack developer, you know the pain of adding a single column to a database table. You add status to your Postgr