🛡️ Prompt Guard
This skill defends AI agents against prompt injection by detecting and blocking suspicious inputs with offline 577-pattern defense and optional API access.
npx playbooks add skill seojoonkim/prompt-guard --skill prompt-guard
About Prompt Guard
Prompt Guard specializes your AI coding agent in security — it this skill defends ai agents against prompt injection by detecting and blocking suspicious inputs with offline 577-pattern defense and optional api access.
At 22 words, this compact prompt gives your agent specialized security expertise with structured patterns and output formats. Install via CLI or copy the prompt below.
Use Cases
- Auditing code for OWASP Top 10 vulnerabilities
- Implementing authentication and authorization patterns
- Reviewing API security, rate limiting, and input validation
- Hardening infrastructure and dependency security
Example Prompts
System Prompt (22 words)
This skill defends AI agents against prompt injection by detecting and blocking suspicious inputs with offline 577-pattern defense and optional API access.
Frequently Asked Questions
What is Prompt Guard?
Prompt Guard is a free security skill for AI coding agents. This skill defends AI agents against prompt injection by detecting and blocking suspicious inputs with offline 577-pattern defense and optional API access.. It provides a specialized system prompt that configures your agent with security expertise.
How do I use Prompt Guard with Claude Code?
Run npx playbooks add skill seojoonkim/prompt-guard --skill prompt-guard in your terminal to install Prompt Guard into your Claude Code session. It works immediately after installation.
Which AI coding agents work with Prompt Guard?
Prompt Guard is compatible with Claude Code, Cursor, GitHub Copilot, Windsurf, OpenClaw, Cline, and any AI agent that supports custom system prompts or .cursorrules files.
Is Prompt Guard free to use?
Yes, Prompt Guard is completely free and open source. The full source is available on GitHub at https://github.com/seojoonkim/prompt-guard/tree/main/SKILL.md. You only need a subscription to the AI agent you use it with.
