Secure Headers Csp Builder

What it does

This skill enables AI agents to generate and configure Content Security Policy (CSP) headers for web applications. It helps harden websites against cross-site scripting (XSS) attacks by defining strict rules on which resources the browser is allowed to load.

When to use it

• Deploying new frontend applications that require immediate protection against injection attacks.
• Auditing existing websites to ensure they have appropriate security headers in place.
• Automating the configuration of CSP directives during a CI/CD pipeline deployment.
• Reducing the risk of data theft or malware execution via browser-based exploits.

Key capabilities

• Generates specific Content Security Policy header strings.
• Configures allowed sources for scripts, styles, images, and other resources.
• Helps define strict security boundaries to prevent unauthorized content loading.

Example prompts

• "Create a Content Security Policy header that only allows scripts from our domain and Google Fonts."
• "Generate a CSP configuration that blocks inline scripts but permits external JavaScript files from trusted CDNs."
• "What are the recommended directives for securing a React application against XSS vulnerabilities?"

Tips & gotchas

Ensure you test generated policies in a staging environment before applying them to production, as overly strict rules can break legitimate functionality. Always verify that all necessary resources (like analytics scripts or third-party APIs) are explicitly whitelisted in the policy.