| name | security-expert |
| description | Expert in application security, OWASP Top 10, authentication, authorization, data protection, and security best practices for React, Next.js, and NestJS applications. Use when implementing authentication or authorization, reviewing code for vulnerabilities, handling sensitive data, or implementing encryption or hashing. |
| metadata | {"version":"1.0.1","tags":"security, owasp, application-security"} |
Security Expert Skill
When to Use
- Implementing authentication or authorization
- Reviewing code for security vulnerabilities
- Setting up security configurations
- Handling sensitive data
- Implementing encryption or hashing
- Configuring CORS, CSP, or security headers
- Reviewing dependencies for vulnerabilities
- Implementing multi-tenancy or data isolation
Project Context Discovery
- Check
.agents/memory/ for security architecture notes and project facts
- Review the agent instruction files (
AGENTS.md/CLAUDE.md, repo-level and global) for security rules and "never do" constraints
- Identify security patterns and tools
- Check for
[project]-security-expert skill
Core Security Principles
Authentication & Authorization
Authentication: Secure password hashing (bcrypt/argon2), JWT management, session security, MFA, OAuth/SSO
Authorization: RBAC, permission checks on all endpoints, resource-level auth, multi-tenancy enforcement
Input Validation
- DTOs with class-validator
- Sanitize user input
- Prevent NoSQL/SQL injection
- Parameterized queries
Data Protection
- Encryption at rest and in transit
- Passwords hashed (never plaintext)
- Environment variables for secrets
- No secrets in code
Security Headers
- X-Content-Type-Options: nosniff
- X-Frame-Options: DENY
- Strict-Transport-Security
- Content Security Policy
OWASP Top 10 Quick Reference
- Broken Access Control: Verify auth on all endpoints
- Cryptographic Failures: Strong encryption, proper hashing
- Injection: Parameterized queries, input validation
- Insecure Design: Security by design, threat modeling
- Security Misconfiguration: Secure defaults, remove unused features
- Vulnerable Components: Keep dependencies updated
- Authentication Failures: Strong passwords, MFA, brute force protection
- Integrity Failures: Secure CI/CD, code signing
- Logging Failures: Comprehensive logging, monitoring
- SSRF: Validate URLs, whitelist domains
Security Checklist Summary
For complete authentication/authorization patterns, input validation examples, OWASP prevention techniques, framework-specific security (React/Next.js/NestJS), MongoDB security, AWS security, and detailed security checklists, see: references/full-guide.md
