What problem does it solve? Building features that span frontend and backend often leads to inconsistent validation, missing authorization checks, and security gaps between layers. This Skill enforces a three-perspective workflow (Frontend, Backend, Security) so every feature ships with authentication, input validation, output encoding, and parameterized queries addressed at every layer. ## Core Features & Use Cases - Three-Perspective Design: Generates technical design documents covering UI components, API endpoints, and security controls before any code is written. - Layered Security Enforcement: Applies a per-feature security checklist covering auth, authorization, rate limiting, SQL injection prevention, and XSS sanitization. - End-to-End Implementation Guidance: Provides reference patterns for CRUD flows, REST/GraphQL API design, microservices, real-time WebSocket features, monorepo structure, and CI/CD deployment. - Use Case: When asked to build an authenticated user profile API with a corresponding React form, it produces the backend endpoint with parameterized queries, the frontend component with validation, and explicit security notes. ## Quick Start Ask the AI to implement a new full-stack feature, such as an authenticated REST endpoint with a matching frontend form, and request that security be addressed at every layer.
