{
  "$type": "site.standard.document",
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  "path": "/t/promptshield-open-source-prompt-injection-hallucinationfirewall-for-any-llm-app/176174#post_1",
  "publishedAt": "2026-05-23T01:27:13.000Z",
  "site": "https://discuss.huggingface.co",
  "tags": [
    "Llmguard Demo - a Hugging Face Space by Neeraj-Ch0udhary",
    "GitHub - Neeraj-Ch0udhary/promptshield: Open-source prompt injection firewall + hallucination blocker + agent memory layer for any LLM app · GitHub",
    "Neeraj-Ch0udhary/llmguard-input-guard · Hugging Face"
  ],
  "textContent": "Built a Python middleware that wraps any LLM call with 3 layers:\n\nInput Guard — blocks prompt injections (DistilBERT, F1: 0.944)\nOutput Guard — catches hallucinations (NLI cross-encoder)\nMemory Layer — persistent agent memory (ChromaDB)\n\nAll local models. No API keys. No cost.\n\npip install neeraj-llmguard\n\nLive demo: Llmguard Demo - a Hugging Face Space by Neeraj-Ch0udhary\nGitHub: GitHub - Neeraj-Ch0udhary/promptshield: Open-source prompt injection firewall + hallucination blocker + agent memory layer for any LLM app · GitHub\nModel: Neeraj-Ch0udhary/llmguard-input-guard · Hugging Face\n\nWould love feedback from the HF community!",
  "title": "PromptShield — open-source prompt injection + hallucinationfirewall for any LLM app"
}