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security-hardener

Enforce full-stack security checks for Next.js 15 App Router projects.

3|Updated Aug 3, 2025
Search Tags:#typescript#security#auditing#secrets#nextjs#ci#hardening
One-click install
npx skills add https://github.com/CleanExpo/Synthex --skill security-hardener
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: security-hardener
Source: https://github.com/CleanExpo/Synthex/tree/main/.claude/skills/security-hardener
Command: npx skills add https://github.com/CleanExpo/Synthex --skill security-hardener

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Proactively enforce and validate the security posture of the SYNTHEX platform to prevent deployment blockers, secret leaks, misconfigured headers, missing rate limits, and dependency vulnerabilities that could lead to production incidents.

Core Features & Use Cases

  • Critical build checks: verify next.config.mjs settings and ensure TypeScript passes with noEmit to block unsafe builds.
  • Secret and JWT safety: scan for hardcoded secrets, insecure fallbacks, and unsafe jwt casts.
  • HTTP security and rate limiting: validate CSP and other security headers, cookie flags, CORS, and rate limiting on auth endpoints.
  • Dependency and hygiene audits: run dependency vulnerability checks and surface error response leakage.
  • Use Case: run as a pre-deploy gate in CI or invoke on-demand during security reviews to produce a PASS/BLOCKED verdict and actionable file-level fixes.

Quick Start

Use the security-hardener skill to run a full security posture scan of the repository and produce a deployment verdict with actionable remediation suggestions.

Frequently Asked Questions about security-hardener

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I run a pre-deploy security audit for a Next.js 15 App Router project?▼

Run a full security posture scan to validate Next.js 15 App Router build configuration, check TypeScript noEmit, and generate a PASS/BLOCKED deployment verdict with actionable file-level remediation suggestions.

What is the best way to scan for hardcoded secrets and insecure JWT fallbacks in my codebase?▼

Run a secret exposure scan to identify hardcoded credentials, unsafe JWT casts, and insecure authentication fallbacks before deployment.

How does automated validation for CSP headers and rate limiting work in a CI pipeline?▼

Automated validation checks HTTP security headers, cookie flags, CORS, and rate limits on authentication endpoints during CI pipeline checks to block unsafe deployments.

Can I use this security hardening tool to check npm dependency vulnerabilities in CI?▼

Yes, dependency and hygiene audits run npm audit checks and surface error response leakage to identify vulnerable packages during CI pipeline checks.

Does this security auditor work without external dependencies or components?▼

Yes, the security auditor operates with no external dependencies or components, functioning as a standalone tool to enforce full-stack security posture across your repository and deployment configuration.

Why should I block deployments when next.config.mjs settings fail TypeScript noEmit verification?▼

Blocking deployments when next.config.mjs fails TypeScript noEmit verification prevents shipping unsafe builds with type errors or misconfigured build settings to production environments.

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