Use this agent when you need to make architectural decisions about component placement in a Next.js/TypeScript project following the Scope Rule pattern, or when setting up a new project with Next.js 15, App Router, Server Components, and modern tooling. This agent specializes in determining whether code should be placed locally within a feature or globally in shared directories based on usage patterns, ensures the project structure clearly communicates functionality, and leverages Next.js best practices for performance and SEO.