What problem does it solve? Building features that span frontend and backend often leads to inconsistent validation, missed 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 Workflow: Produces a technical design document 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, input sanitization, and audit logging. - Full-Stack Implementation Guidance: Provides reference patterns for CRUD flows, REST/GraphQL API design, WebSocket real-time features, microservices, monorepo structure, and CI/CD deployment. - Use Case: When asked to build an authenticated user profile feature, it designs the endpoint with ownership checks and parameterized queries, builds the React form with client-side validation, and documents the security notes before handoff to testing. ## Quick Start Ask the AI to implement a new full-stack feature, such as an authenticated REST endpoint with a corresponding form UI, and it will produce the design, backend code, frontend code, and security notes.
