flow-sales Cursor Rules

# FlowSales Project Rules

Default to using Bun instead of Node.js.

## Commands
- Use `bun <file>` instead of `node <file>` or `ts-node <file>`
- Use `bun test` instead of `jest` or `vitest`
- Use `bun build <file.html|file.ts|file.css>` instead of `webpack` or `esbuild`
- Use `bun install` instead of `npm install` or `yarn install` or `pnpm install`
- Use `bun run <script>` instead of `npm run <script>` or `yarn run <script>` or `pnpm run <script>`
- Use `bunx <package> <command>` instead of `npx <package> <command>`
- Bun automatically loads .env, so don't use dotenv.

## Language & Communication
- 全てのアーティファクト（Implementation Plan, Walkthrough, 等）およびテクニカルドキュメントは、日本語で作成してください。
- ファイルやディレクトリ、関数名、クラス名などを参照する際は、バッククォート（` `）で囲み、可能な限りリンク（[file.ts](file:///path/to/file.ts)）を併用してください。

## Preferred APIs
- `Bun.serve()` supports WebSockets, HTTPS, and routes. Don't use `express`.
- `bun:sqlite` for SQLite. Don't use `better-sqlite3`.
- `Bun.redis` for Redis. Don't use `ioredis`.
- `Bun.sql` for Postgres. Don't use `pg` or `postgres.js`.
- `WebSocket` is built-in. Don't use `ws`.
- Prefer `Bun.file` over `node:fs`'s readFile/writeFile
- Bun.$`ls` instead of execa.

## Frontend
Use HTML imports with `Bun.serve()`. Don't use `vite`. HTML imports fully support React, CSS, Tailwind.
Bun's bundler will transpile & bundle automatically.