Prompt Injection Detector: a 6-point checklist for scanning untrusted text before it hits your LLM
blaizedsouza · x · 2026-09-13
A practical prompt injection detection cheatsheet for production RAG/agent stacks: retrieved pages can try to become your system prompt, so scan before text enters model context. The six points: scan pre-context, flag "ignore previous instructions" patterns, isolate flagged spans, prefer extractive answers on flagged sources, block tool use when injection is likely, and keep samples for the red team. Core principle: untrusted text is data, not orders — and your own knowledge base can be poisoned, so scan it too.
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