# Nanodrop

Simple file-sharing platform. TypeScript + Fastify + SQLite.

## Commands

- `npm test` — Run all tests (vitest)
- `npm run dev` — Start dev server (tsx)
- `npm run build` — Compile TypeScript
- `npm run register-user -- --username <user> --password <pass>` — Create user

## Architecture

- ESM throughout (`"type": "module"`)
- Fastify with server-rendered HTML pages
- SQLite via better-sqlite3 for persistence
- JWT in httpOnly cookies for auth
- PRG pattern for HTML forms (no client-side JS except copy-to-clipboard)
- Dependency injection — DB/service functions take deps as params for testability

## Code Quality

- Review code after every change. Refactor for readability.
- Use TDD: write tests first, then implement.
- Build and test after every change.
- Break large functions into smaller ones, extract duplicate code.
- Search for duplicated code in tests and extract into reusable helpers.
- Commit after every logical set of changes. Keep commits small and focused.