TanStack + Elysia Monorepo

A full-stack TypeScript monorepo powered by TanStack Start, Elysia, and Effect — with end-to-end type safety from database to UI.

Tech Stack

Layer	Technology
Frontend	TanStack Start, TanStack Router, TanStack Query, React 19, Tailwind CSS v4, shadcn/ui, Paraglide JS
Backend	Elysia, Effect, Prisma, Zod
API Client	Eden Treaty (end-to-end type safety)
Tooling	Turborepo, Bun, Biome, TypeScript

Workspace

Package	Path	Description
web	apps/web	TanStack Start frontend (React 19 + Tailwind + Paraglide i18n)
api	apps/api	Elysia + Effect + Prisma backend
@repo/eden	packages/eden	Eden Treaty client — shared API client with end-to-end type safety
@repo/shadcn	packages/shadcn	shadcn/ui components — shared design system
@repo/typescript-config	packages/typescript-config	Shared tsconfig

Getting Started

# Install dependencies
bun install

# Start all apps in development
bun run dev

# Build all apps
bun run build

Commands

bun run dev          # Start all apps
bun run build        # Build all apps
bun run lint         # Lint via Biome
bun run format       # Format via Biome
bun run check-types  # Type-check all packages
bun run check-deps   # Check outdated deps
bun run upgrade-deps # Interactive upgrade
bun run clean-deps   # Remove node_modules, lockfiles, caches

License

MIT