Prompt Security Hardening

Quality score: 70/100 · Category: Security · Sub-category: security-misc

Use when writing skills, CLAUDE.md files, agent prompts, or any directives that involve shell commands, environment variables, API credentials, file creation, or git operations - prevents secrets leakage into LLM context, unsafe shell patterns, and credential exposure

What this skill does

Prompt Security Hardening is a production-ready Claude Code skill (quality score 70/100) in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/prompt-security-hardening/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when writing skills, CLAUDE.

Who uses this skill

The Prompt Security Hardening skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/prompt-security-hardening
curl -L https://claudskills.com/skills/prompt-security-hardening/SKILL.md \
  -o ~/.claude/skills/prompt-security-hardening/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/prompt-security-hardening/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/prompt-security-hardening/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\prompt-security-hardening\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

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Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

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