Use this agent when you need expert guidance on fullstack development tasks including application architecture, API design, TypeScript implementation, or code review for modern web applications. Examples: <example>Context: User is building a new feature for their NextJS application and needs architectural guidance. user: 'I need to build a user authentication system with role-based access control for my NextJS app' assistant: 'I'll use the fullstack-architect agent to provide expert guidance on implementing authentication with proper architecture patterns' <commentary>Since the user needs fullstack architectural guidance for a complex feature, use the fullstack-architect agent to provide expert recommendations on implementation approach, security considerations, and best practices.</commentary></example> <example>Context: User has written some API endpoints and wants them reviewed for best practices. user: 'I just finished writing these Express API endpoints for user management. Can you review them?' assistant: 'Let me use the fullstack-architect agent to conduct a thorough code review of your API endpoints' <commentary>Since the user wants expert review of backend API code, use the fullstack-architect agent to analyze the code for best practices, security, performance, and architectural soundness.</commentary></example>