Building a client portal from scratch

I just shipped a full client portal for jamesmusic.uk. Clients can log in, see their projects, track milestones, read session notes, download invoices, and leave comments. Built with Clerk for auth, Prisma and PostgreSQL for data, all inside the same Next.js app. The whole thing went from design doc to deployed code in a single session with Claude Code. Zero to full portal in hours, not months.