A production-shaped realtime collaborative Kanban platform built with Next.js 15, Supabase, PostgreSQL, Supabase Auth, Supabase Realtime, Tailwind CSS, shadcn-style primitives, Framer Motion, Zustand, dnd-kit, React Hook Form/Zod patterns, Lucide icons, and next-themes.

1. Install dependencies:

npm install

2. Create a Supabase project and run supabase/schema.sql in the SQL editor.

3. Copy environment variables:

cp .env.example .env.local

4. Fill in:

NEXT_PUBLIC_SUPABASE_URL=
NEXT_PUBLIC_SUPABASE_ANON_KEY=
NEXT_PUBLIC_APP_URL=http://localhost:3000

5. Start the app:

npm run dev

New signups automatically receive a seeded workspace, board, labels, columns, and tasks.

Deploy to Vercel, set the same environment variables, and ensure Supabase Auth redirect URLs include:

• http://localhost:3000/auth/callback
• https://your-domain.com/auth/callback

• app/ contains App Router routes, protected layouts, server actions, API routes, loading and error states.
• components/ contains reusable UI primitives, auth UI, shell layout, board UI, task modal, notifications, and theme controls.
• lib/ contains Supabase clients, typed data fetchers, validation schemas, utilities, and domain types.
• store/ contains Zustand state for optimistic Kanban interactions.
• supabase/schema.sql contains PostgreSQL tables, indexes, RLS policies, triggers, defaults, audit logging, and realtime publication.