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name: project-architecture description: Overview of the project's tech stack, directory structure, and architectural patterns.

Project Architecture & Tech Stack

Tech Stack

• Framework: Next.js 15 (App Router)
• Language: TypeScript
• Styling: Tailwind CSS v4, CSS Modules (for specific components)
• Docs/Content: Docusaurus (in textbook/ directory)
• Auth: Better Auth (better-auth)
• Database: PostgreSQL (NeonDB)
• ORM: Drizzle ORM
• UI Components: Lucide React icons, Custom components

Directory Structure

• /app: Next.js App Router pages and layouts.
• /components: Reusable UI components.
  • /auth: Authentication related components (forms, etc.).
• /lib: Utility functions and shared logic.
  • auth-client.ts: Better Auth client configuration.
  • auth.ts: Better Auth server configuration.
• /db: Database schema and connection logic.
• /drizzle: Migrations.
• /textbook: Docusaurus instance for documentation/content.
  • /src: Docusaurus source files.

Key Patterns

• Hybrid App: Combines a Next.js web app (marketing, auth, dashboard) with a Docusaurus documentation site.
• Auth Integration: Shared authentication state between Next.js and Docusaurus via cookies/sessions (handled by AuthBar).
• Styling: Global Tailwind styles in app/globals.css. Docusaurus has its own theme in textbook/src/css/custom.css.

Development

• Run root app: npm run dev:root
• Run docs app: npm run dev:docs
• Run both: npm run dev