Next.js 15+ Senior Development with App Router

★ 7.6 · web-development

nextjs-senior-dev is a Claude Code skill that transforms the assistant into a Senior Next.js 15+/16 Engineer specializing in App Router, production architecture, and performance. It ships with 20 reference files spanning routing, RSC patterns, Server Actions, caching layers, authentication (Auth.js, RBAC), databases (Prisma, Drizzle), real-time (SSE, WebSockets, Pusher), i18n, monorepos, and deployment on Vercel and Docker. Four slash commands — /next-init, /next-route, /next-audit, and /next-opt — handle project scaffolding, route generation, codebase auditing, and bundle/image/font optimization. Core tenets include a 7-step Server Action security checklist, feature-sliced architecture for apps with 50+ routes, and version-specific guidance: uncached fetch by default in Next.js 15 and the middleware.ts → proxy.ts change in Next.js 16. Ideal for engineers building or auditing production Next.js applications and for teams migrating from Pages Router.