Overview
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.
Best for
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
Installation
Add prompt-guard to your agent with:
/plugin marketplace add Orchestra-Research/AI-Research-SKILLsReview a skill’s source before installing it — skills can instruct your agent to run commands. This command comes from the skill’s public repository, which is the source of truth for setup steps. New to skills? Read how to install Claude Code skills.
Supported agents
- Claude Code — ships a claude code plugin marketplace
- Codex — declared in the repository topics
License
prompt-guard is published under the MIT license.
Strengths
- Clear MIT license — safe to read and adapt within its terms
- Ships in Orchestra-Research/AI-Research-SKILLs, an established project with 11,807 GitHub stars
- Works with Claude Code, Codex
Author
Topics
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.
- Which agents does prompt-guard work with?
- prompt-guard lists Claude Code and Codex — named in its SKILL.md, its plugin marketplace or its repository topics. Skills use the portable SKILL.md format, so other agents that read that format may load it too.
- 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.
