Show HN: Built firewall for LLMs after prompt injection bypass GPT-4s guardrails
https://github.com/WardLink/TrustLayer--Security-Control-Plane-For-LLM-AI
After watching prompt injection attacks bypass every major LLM's safety systems, I built TrustLayer.It's a simple API that: 1. Scans prompts for injection attacks in real-time (heuristic + OpenAI moderation) 2. Detects when agents drift from their intended behavior 3. Has a kill switch for production incidents
Built for production use. Free tier available. Open source docs and examples.
The problem: Prompt injection is still breaking LLM apps in production. Most guardrails can be bypassed with simple tricks.
The solution: API-first security layer that sits between your app and the LLM.