PIGuard's a tiny 184MB model guarding LLMs from prompt injections, fixing overdefense with MOF training – all open-source.

How does PIGuard stop prompt injection attacks?

It scans inputs first, flags malice without trigger bias, balancing benign accuracy at 99%+ while nailing attacks.

Is PIGuard free and open source?

Yes – full code, NotInject dataset, training deets released. Grab it now.

🤖 AI Dev Tools

Prompt guards are tripping over their own feet, flagging harmless chats as attacks. Enter PIGuard, promising a fix – if you buy the pitch.

DevTools Feed Apr 03, 2026 3 min read 14 views

PIGuard crushes overdefense in prompt guards, boosting benign accuracy without extra cost. 𝕏
NotInject dataset exposes SOTA models' trigger-word bias – accuracy hits random levels. 𝕏
Lightweight at 184MB, it rivals GPT-4 performance; fully open-source for devs. 𝕏

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#LLM guardrails #PIGuard #Prompt Injection #overdefense

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Originally reported by Hacker News