# AGENTS.md

## Project Overview

This is a Next.js 14 e-commerce application using the App Router,
Server Components, and Drizzle ORM with PostgreSQL.

## Code Conventions

- Use TypeScript strict mode throughout
- Prefer Server Components; use "use client" only when necessary
- Name files with kebab-case: `product-card.tsx`, not `ProductCard.tsx`
- Co-locate tests: `product-card.test.tsx` next to `product-card.tsx`

## Architecture

- `app/`           — Next.js App Router pages and layouts
- `components/`    — Shared UI components
- `lib/`           — Utilities, database client, auth helpers
- `actions/`       — Server Actions for mutations

## Testing

- Use Vitest for unit tests, Playwright for E2E
- Mock database calls using `lib/test-utils.ts` helpers
- Every new component needs at least one test

## Build Commands

```bash
pnpm dev          # Start dev server
pnpm build        # Production build
pnpm test         # Run Vitest
pnpm test:e2e     # Run Playwright
pnpm lint         # ESLint check
```

# Project Rules

## Stack
- TypeScript 5.x with strict mode
- React 19 + Next.js 15 (App Router)
- Tailwind CSS v4 for styling
- Drizzle ORM for database access

## Code Standards
- Named exports only (no default exports)
- Prefer `const` assertions and satisfies operator
- Use Result<T, E> pattern for error handling
- Maximum 30 lines per function

## File Organization
- Colocate tests: `foo.ts` → `foo.test.ts`
- One component per file
- Barrel exports (index.ts) for public module APIs

## Git
- Conventional commits: feat|fix|chore|docs|test
- Squash merge feature branches
- Branch naming: type/description