Prompting for Structure: How to Write AI Prompts That Don't Create Architectural Debt

Post 1 showed the mess. Here's the fix. The loyalty points example ended with a constrained prompt one paragraph that told the AI exactly which file, exactly which layer, exactly what wasn't allowed. The AI produced a clean domain object on the first try. No drift, no boundary violations, no cleanup. That wasn't luck. It was a pattern. This post is about making that pattern repeatable. Why Most Prompts Produce Drift When you write "add a discount service," you're asking the AI to make three deci