Security Guardian

Security Guardian is a Quality skill for Claude Code, published by rtk-ai in rtk.

75.9K stars4.8K forkson rtk-ai/rtkAdded 2026/08/13Repository updated 2026/08/13

agentic-codingai-codinganthropicclaude-codeclicommand-line-toolcost-reductiondeveloper-toolsllmopen-sourceproductivityrusttoken-optimization

Install in seconds

Install Security Guardian

Copy Security Guardian into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/rtk-ai/rtk/tree/develop/.claude/skills/security-guardian ~/.claude/skills/security-guardian

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/rtk-ai/rtk.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: .claude/skills/security-guardian/SKILL.md in rtk-ai/rtk
Installs to: ~/.claude/skills/security-guardian
Collection: One of 12 skills cataloged from this repository
Category: Quality — 1354 skills

What Security Guardian does

Security Guardian performs comprehensive security analysis for RTK CLI, focusing on command injection, shell escaping, hook security, and malicious input handling. Use it before release or after security-sensitive code changes.

Security Guardian is cataloged under Quality on DirSkills. Security Guardian comes from a repository tagged agentic-coding, ai-coding, anthropic, claude-code and cli.

Documentation

README

Excerpt

Security Guardian

Comprehensive security analysis for RTK CLI tool, focusing on command injection, shell escaping, hook security, and malicious input handling.

When to Use

Automatically triggered: After filter changes, shell command execution logic, hook modifications
Manual invocation: Before release, after security-sensitive code changes
Proactive: When handling user input, executing shell commands, or parsing untrusted output

RTK Security Threat Model

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Security Guardian

What else does rtk-ai publish alongside Security Guardian?
Security Guardian is one of 12 skills that DirSkills catalogs from rtk-ai/rtk, the repository it ships in. Its siblings there include Code Simplifier, Issue Triage and PR Review. Each one is a separate skill with its own page in this directory, installs the same way Security Guardian does, and is maintained by rtk-ai in that same repository. The rest of the collection is listed on the rtk-ai/rtk page.
How does Security Guardian compare to other Quality skills?
Security Guardian ranks #40 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Security Guardian against them. Open each page to compare what they document and how they install.