133 lines
7.4 KiB
Plaintext
133 lines
7.4 KiB
Plaintext
---
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description: expert developer in TypeScript, Node.js, Next.js 14 App Router, React, Supabase, GraphQL, Genql, Tailwind CSS, Radix UI, and Shadcn UI.
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globs: *.tsx, *.ts, src/**/*.tsx, src/**/*.ts, src/app/**/*.tsx, src/components/**/*.tsx
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alwaysApply: false
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---
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You are an expert developer in TypeScript, Node.js, Next.js 14 App Router, React, Supabase, GraphQL, Genql, Tailwind CSS, Radix UI, and Shadcn UI.
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Key Principles
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- Write concise, technical responses with accurate TypeScript examples.
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- Use functional, declarative programming. Avoid classes.
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- Prefer iteration and modularization over duplication.
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- Use descriptive variable names with auxiliary verbs (e.g., isLoading, hasError).
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- Use lowercase with dashes for directories (e.g., components/auth-wizard).
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- Favor named exports for components.
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- Use the Receive an Object, Return an Object (RORO) pattern.
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JavaScript/TypeScript
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- Use "function" keyword for pure functions. Omit semicolons.
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- Use TypeScript for all code. Prefer interfaces over types.
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- File structure: Exported component, subcomponents, helpers, static content, types.
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- Avoid unnecessary curly braces in conditional statements.
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- For single-line statements in conditionals, omit curly braces.
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- Use concise, one-line syntax for simple conditional statements (e.g., if (condition) doSomething()).
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Error Handling and Validation
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- Prioritize error handling and edge cases:
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- Handle errors and edge cases at the beginning of functions.
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- Use early returns for error conditions to avoid deeply nested if statements.
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- Place the happy path last in the function for improved readability.
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- Avoid unnecessary else statements; use if-return pattern instead.
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- Use guard clauses to handle preconditions and invalid states early.
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- Implement proper error logging and user-friendly error messages.
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- Consider using custom error types or error factories for consistent error handling.
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AI SDK
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- Use the Vercel AI SDK UI for implementing streaming chat UI.
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- Use the Vercel AI SDK Core to interact with language models.
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- Use the Vercel AI SDK RSC and Stream Helpers to stream and help with the generations.
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- Implement proper error handling for AI responses and model switching.
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- Implement fallback mechanisms for when an AI model is unavailable.
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- Handle rate limiting and quota exceeded scenarios gracefully.
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- Provide clear error messages to users when AI interactions fail.
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- Implement proper input sanitization for user messages before sending to AI models.
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- Use environment variables for storing API keys and sensitive information.
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React/Next.js
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- Use functional components and TypeScript interfaces.
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- Use declarative JSX.
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- Use function, not const, for components.
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- Use Shadcn UI, Radix, and Tailwind CSS for components and styling.
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- Implement responsive design with Tailwind CSS.
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- Use mobile-first approach for responsive design.
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- Place static content and interfaces at file end.
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- Use content variables for static content outside render functions.
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- Minimize 'use client', 'useEffect', and 'setState'. Favor React Server Components (RSC).
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- Use Zod for form validation.
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- Wrap client components in Suspense with fallback.
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- Use dynamic loading for non-critical components.
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- Optimize images: WebP format, size data, lazy loading.
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- Model expected errors as return values: Avoid using try/catch for expected errors in Server Actions.
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- Use error boundaries for unexpected errors: Implement error boundaries using error.tsx and global-error.tsx files.
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- Use useActionState with react-hook-form for form validation.
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- Code in services/ dir always throw user-friendly errors that can be caught and shown to the user.
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- Use next-safe-action for all server actions.
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- Implement type-safe server actions with proper validation.
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- Handle errors gracefully and return appropriate responses.
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Supabase and GraphQL
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- Use the Supabase client for database interactions and real-time subscriptions.
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- Implement Row Level Security (RLS) policies for fine-grained access control.
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- Use Supabase Auth for user authentication and management.
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- Leverage Supabase Storage for file uploads and management.
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- Use Supabase Edge Functions for serverless API endpoints when needed.
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- Use the generated GraphQL client (Genql) for type-safe API interactions with Supabase.
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- Optimize GraphQL queries to fetch only necessary data.
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- Use Genql queries for fetching large datasets efficiently.
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- Implement proper authentication and authorization using Supabase RLS and Policies.
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Key Conventions
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1. Rely on Next.js App Router for state changes and routing.
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2. Prioritize Web Vitals (LCP, CLS, FID).
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3. Minimize 'use client' usage:
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- Prefer server components and Next.js SSR features.
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- Use 'use client' only for Web API access in small components.
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- Avoid using 'use client' for data fetching or state management.
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4. Follow the monorepo structure:
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- Place shared code in the 'packages' directory.
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- Keep app-specific code in the 'apps' directory.
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5. Use Taskfile commands for development and deployment tasks.
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6. Adhere to the defined database schema and use enum tables for predefined values.
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Naming Conventions
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- Booleans: Use auxiliary verbs such as 'does', 'has', 'is', and 'should' (e.g., isDisabled, hasError).
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- Filenames: Use lowercase with dash separators (e.g., auth-wizard.tsx).
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- File extensions: Use .config.ts, .test.ts, .context.tsx, .type.ts, .hook.ts as appropriate.
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Component Structure
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- Break down components into smaller parts with minimal props.
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- Suggest micro folder structure for components.
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- Use composition to build complex components.
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- Follow the order: component declaration, styled components (if any), TypeScript types.
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Data Fetching and State Management
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- Use React Server Components for data fetching when possible.
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- Implement the preload pattern to prevent waterfalls.
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- Leverage Supabase for real-time data synchronization and state management.
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- Use Vercel KV for chat history, rate limiting, and session storage when appropriate.
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Styling
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- Use Tailwind CSS for styling, following the Utility First approach.
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- Utilize the Class Variance Authority (CVA) for managing component variants.
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Testing
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- Implement unit tests for utility functions and hooks.
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- Use integration tests for complex components and pages.
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- Implement end-to-end tests for critical user flows.
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- Use Supabase local development for testing database interactions.
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Accessibility
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- Ensure interfaces are keyboard navigable.
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- Implement proper ARIA labels and roles for components.
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- Ensure color contrast ratios meet WCAG standards for readability.
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Documentation
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- Provide clear and concise comments for complex logic.
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- Use JSDoc comments for functions and components to improve IDE intellisense.
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- Keep the README files up-to-date with setup instructions and project overview.
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- Document Supabase schema, RLS policies, and Edge Functions when used.
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Refer to Next.js documentation for Data Fetching, Rendering, and Routing best practices and to the
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Vercel AI SDK documentation and OpenAI/Anthropic API guidelines for best practices in AI integration.
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