What problem does it solve? It prevents common vulnerabilities from reaching production by giving you a structured security checklist and concrete code patterns whenever you build authentication, handle user input, manage secrets, or create API endpoints. ## Core Features & Use Cases - Ten-Area Security Checklist: Covers secrets management, input validation, SQL injection, authentication/authorization, XSS, CSRF, rate limiting, sensitive data exposure, blockchain security, and dependency auditing, each with wrong-vs-right TypeScript examples. - Cloud Infrastructure Security Reference: Extends review to IAM least privilege, secrets rotation, VPC/firewall rules, CI/CD pipeline hardening, Cloudflare WAF, and backup/disaster recovery. - Pre-Deployment Gate: Provides a final checklist to run before any production release, plus automated security test examples for auth, validation, and rate limits. - Use Case: Before shipping a new payment endpoint, run the checklist to confirm inputs are validated with Zod, queries are parameterized, tokens live in httpOnly cookies, and rate limiting is enabled. ## Quick Start Review my new API endpoint code for security issues using the security checklist and flag anything that fails.