/security-headers

Use when verifying or configuring HTTP security headers (CSP, HSTS, CORS, X-Frame-Options) for a web application (Next.js, Laravel, Express, Django).

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fusengine-agents

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Install

$ npx -y skills add fusengine/agents --skill security-headers --agent claude-code

How it fires

How this skill gets triggered: by you, by Claude, or both.

Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
You can call itInvoke it directly when you want it.
Slash command/security-headers

Context preview

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Use when verifying or configuring HTTP security headers (CSP, HSTS, CORS, X-Frame-Options) for a web application (Next.js, Laravel, Express, Django).

SKILL.md

security-headers.SKILL.md

name: security-headers
description: "Use when verifying or configuring HTTP security headers (CSP, HSTS, CORS, X-Frame-Options) for a web application (Next.js, Laravel, Express, Django)."
argument-hint: "[framework]"
user-invocable: true

<objective> This skill audits and configures HTTP security headers for a web application: Content-Security-Policy and Strict-Transport-Security (HIGH severity if missing), X-Content-Type-Options and X-Frame-Options (MEDIUM), and Referrer-Policy, Permissions-Policy, X-XSS-Protection (LOW).

It detects the framework (Next.js next.config.js headers/middleware.ts, Laravel SecurityHeaders middleware, Express helmet, Django SECURE_* settings), checks the current configuration against best practice, generates a framework-specific fix, and validates the headers are properly set. </objective>

Security Headers Skill

Overview

Audit and configure HTTP security headers for web applications.

Required Headers

| Header | Purpose | Severity if Missing | |--------|---------|-------------------| | Content-Security-Policy | Prevent XSS/injection | HIGH | | Strict-Transport-Security | Force HTTPS | HIGH | | X-Content-Type-Options | Prevent MIME sniffing | MEDIUM | | X-Frame-Options | Prevent clickjacking | MEDIUM | | Referrer-Policy | Control referrer info | LOW | | Permissions-Policy | Control browser features | LOW | | X-XSS-Protection | Legacy XSS filter | LOW |

Workflow

1. **Detect** framework (Next.js, Laravel, Express, etc.) 2. **Check** current header configuration 3. **Compare** against security best practices 4. **Generate** framework-specific configuration 5. **Validate** headers are properly set

Detection Points

| Framework | Config Location | |-----------|----------------| | Next.js | `next.config.js` headers, `middleware.ts` | | Laravel | `SecurityHeaders` middleware | | Express | `helmet` middleware | | Django | `SECURE_*` settings |