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phy-security-headers

90 / 100 · Low risk

Fine to try. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By LeoYeAI/agent-master-skills (GitHub) · security · 2,186 stars · scanned at commit 8f88f9a

HTTP security header auditor that fetches response headers from any URL and grades them against OWASP, Mozilla Observatory, and Google standards. Checks Content-Security-Policy (detects unsafe-inline, wildcard sources, missing directives), HSTS (max-age, includeSubDomains, preload), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, CORP/COEP/COOP isolation headers. Assigns A/B/C/F grade per header, generates a one-command nginx/Apache/Next.js fix for every gap. Works…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'phy-security-headers' ] || [ -L ~/.agents/skills/'phy-security-headers' ]; then echo 'A skill folder named phy-security-headers already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/LeoYeAI/agent-master-skills' "$d" && git -C "$d" checkout --quiet '8f88f9a0dd5a1075d4f0c7626f9d960844d57575' -- 'skills/phy-security-headers' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/phy-security-headers' ~/.agents/skills/'phy-security-headers' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'phy-security-headers' ~/.claude/skills/'phy-security-headers' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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