SecurityEngineeringPlatinum

Secure web apps against XSS and content attacks with CSP headers.

Content Security Policy Architect

CSP Headers, XSS Prevention, Web Security

1 loadsintermediatev6.0

Best for

▸Designing nonce-based CSP policies for React/Next.js SPAs to prevent XSS attacks
▸Migrating from whitelist-based to strict-dynamic CSP policies without breaking third-party integrations
▸Implementing CSP violation reporting and monitoring for enterprise web applications
▸Configuring CSP headers for content-heavy platforms with user-generated content and embedded media

What you'll get

▸Complete CSP header configuration with nonce generation code for specific frameworks, testing methodology, and rollback plan
▸Step-by-step migration guide from current policy to strict CSP with violation analysis and third-party integration fixes
▸Production-ready CSP monitoring setup with violation reporting endpoints, alerting rules, and policy refinement process

Expects

Details about your web application's architecture, rendering model (SSR/CSR), third-party integrations, and current security headers implementation.

Returns

Specific CSP policy directives, deployment strategies with report-only testing phases, framework-specific implementation code, and violation monitoring setup.

What's inside

“You are a Content Security Policy Architect. You design, deploy, and maintain CSP headers across enterprise-scale applications, SPAs, and content-heavy platforms using strict nonce-based and hash-based policies grounded in the W3C CSP Level 3 specification. - **Strict-CSP over whitelists.** Whitelis...”

Covers

What You Do DifferentlyMethodologyWatch For

Not designed for ↓

×General web application firewall configuration or DDoS protection strategies
×Backend API security or database injection prevention beyond frontend context
×Mobile app security or native application content policies
×Network-level security or infrastructure hardening beyond browser security headers

SupaScore

89.1▼

Research Quality (15%)

9.1

Prompt Engineering (25%)

8.95

Practical Utility (15%)

8.8

Completeness (10%)

8.9

User Satisfaction (20%)

Decision Usefulness (15%)

8.65

Evidence Policy

Standard: no explicit evidence policy.

cspcontent-security-policyxss-preventionweb-securitysecurity-headersnoncestrict-dynamicbrowser-securityowaspdefense-in-depthviolation-reportingfrontend-security

Research Foundation: 7 sources (3 official docs, 2 academic, 1 industry frameworks, 1 web)

This skill was developed through independent research and synthesis. SupaSkills is not affiliated with or endorsed by any cited author or organisation.

Version History

v6.06/12/2026

v6.0 wave-1 repair: re-distilled from masterfile/v2 (truncation incident 2026-06, delta-first rules)

v5.03/25/2026

v5.5 distilled from v2 via Claude Sonnet

v2.02/21/2026

Pipeline v4: rebuilt with 3 helper skills

v1.0.02/16/2026

Initial release

Works well with

API Security HardenerPlatinum Browser Extension Security AuditorPlatinum DevSecOps Pipeline ArchitectPlatinum Frontend Observability EngineerPlatinum Web Application Firewall ArchitectPlatinum

Need more depth?

Specialist skills that go deeper in areas this skill touches.

Security Architecture ReviewerPlatinum Penetration Testing GuidePlatinum Threat Modeling AdvisorPlatinum

Common Workflows

Frontend Security Hardening Pipeline

Comprehensive frontend security implementation from CSP policy design through monitoring and code review validation

content-security-policy-architect→Frontend Observability Engineer→security-code-reviewer