Backend architecture, patterns and conventions for the Express.js 5 API. Trigger: When working on backend code, API routes, controllers, or database.
Create interface designs, wireframes, and design systems. Masters user research, accessibility standards, and modern design tools. Specializes in design tokens, component libraries, and inclusive design. Use PROACTIVELY for design systems, user flows, or interface optimization.
Unit testing pattern for Express 5 controllers using node-mocks-http and @prisma/client mocks. Trigger: When writing unit tests for backend controllers, testing Express routes, or avoiding Supertest/Server instantiation.
Frontend architecture, patterns and conventions for the Next.js 15 app. Trigger: When working on frontend code, components, pages, or API integration.
Creates professional git commits following conventional-commits format. Trigger: When creating commits, after completing code changes, when user asks to commit.
Creates new AI agent skills following the Agent Skills spec. Trigger: When user asks to create a new skill, add agent instructions, or document patterns for AI.