What problem does it solve? Node.js developers often default to familiar frameworks and patterns without considering whether they fit the project's deployment target, performance needs, or team context. This Skill provides decision-making frameworks for choosing frameworks, runtimes, async patterns, and security practices based on actual project requirements. ## Core Features & Use Cases - Framework Selection Guidance: Decision trees and comparison tables for Hono, Fastify, Express, and NestJS based on deployment target, cold start needs, and ecosystem maturity. - Architecture & Async Principles: Layered structure concepts (controller/service/repository), event loop awareness, and guidance on when to use Promise.all, allSettled, or worker threads. - Security & Validation Checklists: Input validation boundaries, library selection (Zod, Valibot, ArkType), HTTP status code selection, and a security mindset checklist. - Use Case: When starting a new serverless API, use this Skill to evaluate whether Hono fits the edge deployment target, plan validation at boundaries, and define an error handling strategy before writing code. ## Quick Start Ask the agent to help choose a Node.js framework and architecture for a new high-performance API deployed to a serverless platform.