This is a Next.js 16 starter template that combines Nextra 4 for documentation, Tailwind CSS 4 for styling, and comprehensive internationalization support. It provides a foundation for building documentation sites, blogs, and marketing landing pages with features like dark/light theme switching, responsive design, SEO optimizations, and pre-built UI components. The architecture centers around Next.js App Router with language-specific routing ([lang] segment), MDX-driven content in src/content/{lang}/, and a modular component system. Key strengths include a type-safe i18n system with compile-time checking, high-performance UI components like ScrollProgressBar (which uses requestAnimationFrame and lerp for smooth animation) and LinkPreview (which combines Radix UI hover cards with Framer Motion physics-based animations), and thoughtful separation of concerns between content, presentation, and logic. The template is actively maintained and stays current with modern web technologies.
This is a Spring Boot starter library that deeply integrates Square's Retrofit HTTP client with Spring Boot's auto-configuration, allowing developers to declare typed HTTP APIs via Java interfaces annotated with `@RetrofitClient`. The library provides a comprehensive set of features: automatic OkHttpClient management, a pluggable interceptor chain (global, network, path-match), configurable retry with exponential backoff and jitter, circuit breaking (via Sentinel or Resilience4j), logging strategies, Micrometer metrics, custom error decoding, and connection pooling. It also supports Spring Boot Actuator for runtime introspection, GraalVM native image/AOT compilation, and reactive call adapters (RxJava 2/3, Reactor). The architecture is modular with clear SPIs for extensibility (e.g., `SourceOkHttpClientRegistrar`, `GlobalInterceptor`, `RetrofitDegrade`, `ErrorDecoder`), and the configuration is annotation-driven with global defaults overridable per-client. The codebase is well-tested with integration tests using MockWebServer, and documentation is provided in multiple languages. However, the tight coupling to specific versions of Retrofit, OkHttp, and Spring Boot introduces moderate technical drift, as some optional dependencies (e.g., Sentinel 1.8.6, Resilience4j 1.7.1) are older. The library is primarily a framework integration rather than a standalone application, but its design patterns serve as a reference for building Spring Boot auto-configuration with complex SPI chains.
Nellavio is a production-grade, open-source Next.js dashboard starter designed for building modern SaaS products, internal tools, and admin panels. It provides 90+ reusable UI components, 60+ chart variations, authentication (Better Auth) with RBAC, i18n (next-intl), theme switching, and extensive data visualization pages (analytics, orders, customers, products, calendar, charts showcase). The architecture follows App Router with clear separation: server components for data fetching (Apollo Client GraphQL with mock fallback), client components for interactive views, Zustand for global state, and TanStack Table for data tables. The codebase is well-tested with Vitest, Storybook, and CI/CD (GitHub Actions). Despite some hardcoded demo data and recent migrations (Clerk→Better-Auth, Tremor→Recharts), the engineering practices are strong, making it a solid foundation for bootstrapping dashboard-centric applications.
This is a modern Next.js 16 starter template using the App Router, designed to jumpstart full-stack web applications. It provides a production-ready monolith with authentication via NextAuth (GitHub provider), payment processing through Stripe subscriptions, and a PostgreSQL database layer using Drizzle ORM and Neon serverless. The application includes internationalization (i18n) with next-intl, dark mode theming, custom fonts, and standard SEO features like sitemap and robots.txt. The codebase demonstrates disciplined engineering with TypeScript, Zod environment validation, Biome linting, Husky git hooks, and both unit (Jest) and end-to-end (Playwright) testing. While functionally complete and well-structured, it is fundamentally a starter kit composed of framework boilerplate and standard integrations, without innovative or deeply reusable custom abstractions beyond what is typical for such templates.
AgentKit is a full-stack framework for building constrained, reliable LLM agents, developed by BCG X and now deprecated. The codebase consists of a FastAPI backend (Python 3.10) that orchestrates LangChain-based agents through a meta-agent and a simple router, executing tools like SQL queries, PDF question-answering, visualizations, image generation, and summarization. The Next.js 14 frontend provides a conversational chat interface with streaming responses, tool action rendering, and configurable UI components. The application is Dockerized with PostgreSQL, Redis, Minio, and Caddy, and supports optional features such as user authentication (NextAuth), feedback collection (LangSmith), and Celery-based background tasks. The architecture is monolithic in code but service-oriented in deployment, with configuration-driven agent behavior via YAML files. While the codebase demonstrates solid engineering patterns (e.g., streaming callbacks, base tool classes, state management), it is explicitly deprecated, relies on outdated LangChain imports and API versions, and requires significant maintenance to be viable for new projects. The repository serves as a reference for building constrained agents but is not recommended for production use without substantial updates.