skill-security

Scan external SKILL.md files for prompt injection and red-flag phrases.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/cris-m/flopsy --skill skill-security
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: skill-security
Source: https://github.com/cris-m/flopsy/tree/main/src/team/templates/skills/skill-security
Command: npx skills add https://github.com/cris-m/flopsy --skill skill-security

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Detect prompt injection, malicious SKILL.md files, poisoned config files, and social engineering attacks targeting the agent. Use when loading external skills, processing untrusted content, or reviewing configuration files.

Core Features & Use Cases

  • Detect prompt injection attempts and anomalous content in skill definitions.
  • Validate frontmatter and scan for red-flag phrases and risky patterns.
  • Provide actionable guidance and safe-handling protocols during evaluation of external skills.

Quick Start

Run a safety scan on the new SKILL.md and any accompanying scripts before enabling the skill.

Frequently Asked Questions about skill-security

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I detect prompt injection in external skills before loading them?

To detect prompt injection in external skills, run a safety scan on the SKILL.md file and accompanying scripts. This validates frontmatter, identifies anomalous content like Unicode steganography, and flags risky patterns before enabling the skill.

What is Unicode steganography and how does it affect untrusted content processing?

Unicode steganography in untrusted content hides malicious payloads using invisible or anomalous characters. Security scanning detects these hidden anomalies during external skill evaluation, preventing covert data exfiltration and prompt injection attacks.

How do I review configuration artifacts for malicious content?

Review configuration artifacts for malicious content by applying safe-handling protocols during evaluation. This involves scanning for poisoned config files, validating frontmatter, and detecting red-flag phrases that indicate social-engineering attempts.

Can I use this to validate frontmatter and scan for red-flag phrases?

Yes, you can validate frontmatter and scan for red-flag phrases. The skill implements anomaly detection and a scanning protocol to identify risky patterns in skill definitions, providing actionable guidance for safe evaluation.

What's the best way to guard an agent from social-engineering attempts in external skills?

The best way to guard an agent from social-engineering attempts is to scan external SKILL.md files for red-flag phrases and anomalous content. This prevents data exfiltration by applying safe-handling protocols during skill loading.