prompt-guard

by Orchestra-Research 12k MIT Updated Jun 16, 2026
prompt-guard skill by Orchestra-Research
prompt-guard — Security skill by Orchestra-Research

prompt-guard is an open-source security skill for Claude Code and compatible agents, published by Orchestra-Research. Its author describes it as: “Meta's 86M prompt injection and jailbreak detector. Filters malicious prompts and third-party data for LLM apps. 99%+ TPR, <1% FPR. Fast (<2ms GPU). Multilingual (8 languages). Deploy with HuggingFace or batch process…”. The project has 12k stars on GitHub and is available under the MIT license. Add it to your setup with `/plugin marketplace add Orchestra-Research/AI-Research-SKILLs`.

What prompt-guard does

Prompt Guard is an 86M parameter classifier that detects prompt injections and jailbreak attempts in LLM applications.

Installation

Add prompt-guard to your agent with:

/plugin marketplace add Orchestra-Research/AI-Research-SKILLs

Always review a skill's source before installing it. This command comes from the skill's public repository; the linked repo is the source of truth for exact setup steps.

What's inside

The SKILL.md for prompt-guard is organised into these sections:

  • Quick start
  • Common workflows
  • Workflow 1: User input filtering (jailbreak detection)
  • Workflow 2: Third-party data filtering (injection detection)
  • Workflow 3: Batch processing for RAG
  • When to use vs alternatives
  • Common issues
  • Threshold recommendations
  • Hardware requirements
  • Resources

When to use it

Reach for prompt-guard when you want security help from your agent without writing the same instructions every session. Load the skill and the agent picks it up automatically for relevant tasks.

Strengths

  • Clear MIT license — safe to read and adapt
  • Ships in Orchestra-Research/AI-Research-SKILLs, an established project with 11,807 GitHub stars
  • Actively maintained (recent commits)

Topics

safety alignmentprompt injectionjailbreak detectionmetainput validationsecuritycontent filteringmultilingualaiai-researchclaudeclaude-codeclaude-skillscodexgeminigpt-5grpohuggingfacemachine-leanringmegatron

Frequently asked questions

What does prompt-guard do?
Meta's 86M prompt injection and jailbreak detector. Filters malicious prompts and third-party data for LLM apps. 99%+ TPR, <1% FPR. Fast (<2ms GPU). Multilingual (8 languages). Deploy with HuggingFace or batch processing for RAG security.
How do I install prompt-guard?
Run /plugin marketplace add Orchestra-Research/AI-Research-SKILLs in your agent, then reload your skills. Review the source at https://github.com/Orchestra-Research/AI-Research-SKILLs before installing.
Is prompt-guard free to use?
Yes. prompt-guard is free and open source under the MIT license, so you can read, run, and adapt it within that license's terms.
Where does prompt-guard come from?
prompt-guard ships inside Orchestra-Research/AI-Research-SKILLs, a repository that contains 41 catalogued skills in total. The repository's 11,807 GitHub stars apply to that whole collection, not to this skill on its own.

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