/* case study */
CADchat: 3D Model Review
A 3D CAD model viewer with persisted design-review comments, built as a type-safe Turborepo monorepo.
// impact: End-to-end type safety from Prisma to React Three Fiber via tRPC
// Context
A design-review tool: inspect a 3D model in the browser and leave review comments with an approval status.
// Challenges
- ›Keep the frontend, API and database contracts in sync
- ›Keep the browser away from direct database access
// Approach
- ›A Turborepo + pnpm monorepo: apps/web (Next.js + R3F), apps/api (NestJS + tRPC), and shared database/trpc/ui packages
- ›Shared Zod schemas and a tRPC router for end-to-end types
- ›Prisma on Supabase Postgres with RLS and no public policies, so all data flows through the API
- ›Two Vercel projects deployed with GitHub Actions CI
// Outcomes
- ›Live demo on Vercel
- ›A clean, layered architecture that mirrors a production setup