I Swapped All-in-One Prompts for a Modular Instruction Set (and Why You Should Too)

Tools like n8n, Make, Langflow, and Flowise usually give you a single input box called “System Prompt." That single box ends up containing everything: identity instructions business logic edge cases response formatting conversation rules This creates something that looks powerful but is actually fragile. I recently encountered a problem while building a WhatsApp sales AI agent that had a massive impact on my learning and changed how I prompt AI agents and LLMs in general.