Why Prompt Injection Is an Architectural Problem - Not Just a Security Bug

"There is no such thing as a 100% secure system." - Roman Yampolskiy If you spend enough time in the AI space, you've probably heard the term prompt injection everywhere. People talk about adding stronger guardrails, smarter filters, better system prompts, jailbreak detectors, AI firewalls, and dozens of new "ultimate" protection techniques almost every week. But here's the uncomfortable reality nobody likes to say clearly: There is no bulletproof defense against prompt injection. If there were,