docs(01-02): complete authentication plan
Tasks completed: 2/2 - Task 1: NextAuth.js configuration with credentials provider and JWT - Task 2: Login page UI, logout flow, seed script, and auth unit tests SUMMARY: .planning/phases/01-foundation/01-02-SUMMARY.md
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kevin-asprec
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.planning/phases/01-foundation/01-02-SUMMARY.md
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---
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phase: 01-foundation
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plan: "02"
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subsystem: auth
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tags: [next-auth, jwt, credentials, bcryptjs, middleware, session, seed]
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requires:
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- phase: 01-foundation/01-01
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provides: "Next.js 15 App Router scaffold, Prisma schema with Tenant and User models, singleton PrismaClient"
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provides:
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- "NextAuth.js v4 credentials provider with JWT sessions carrying tenantId and roles"
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- "Extended NextAuth types (Session, JWT) with tenantId, roles, isSuperAdmin, firstName, lastName"
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- "Route protection middleware (src/middleware.ts) redirecting unauthenticated users to /login"
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- "Login page UI at /login with email/password form, error/loading states"
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- "Logout via Header component Sign out button (signOut with callbackUrl /login)"
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- "Server-side auth helpers: getServerSession() and getCurrentUser() in src/lib/auth.ts"
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- "Seed data: Demo ISP tenant + admin@demo.com (ADMIN) + superadmin@netforge.com (super-admin)"
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- "8 unit tests for authOptions JWT/session callbacks"
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affects:
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- "01-03 (tenant provisioning): reads tenantId from JWT token for tenant context"
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- "All future plans: getCurrentUser() is the primary auth helper for Server Components"
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- "Phase 2 (billing/RBAC): roles array in JWT enables RBAC checks"
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- "Phase 3 (collectors): tenantId in JWT scopes all queries to correct tenant"
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tech-stack:
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added: [next-auth@4, bcryptjs@3, @types/bcryptjs, @types/jest, tsx]
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patterns:
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- "JWT strategy with 24-hour maxAge — no server-side session storage needed"
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- "tenantId + roles in JWT token for stateless RBAC and multi-tenancy"
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- "withAuth middleware from next-auth/middleware for route protection"
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- "SessionProvider at root layout level (src/components/providers.tsx) for useSession access"
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- "Seed script uses findFirst+create pattern for null tenantId super-admins (PostgreSQL unique constraint behavior with nulls)"
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key-files:
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created:
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- src/types/next-auth.d.ts
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- src/lib/auth-options.ts
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- src/lib/auth.ts
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- src/app/api/auth/[...nextauth]/route.ts
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- src/middleware.ts
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- src/app/(auth)/layout.tsx
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- src/app/(auth)/login/page.tsx
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- src/app/(dashboard)/layout.tsx
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- src/app/(dashboard)/dashboard/page.tsx
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- src/components/layout/header.tsx
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- src/components/providers.tsx
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- prisma/seed.ts
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- src/lib/__tests__/auth.test.ts
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modified:
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- package.json
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- src/app/layout.tsx
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key-decisions:
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- "Used NextAuth.js v4 (not v5/Auth.js beta) for credentials provider stability"
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- "JWT carries tenantId and roles directly — no database lookup on each request"
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- "Super-admin user has tenantId=null; authorize() checks isSuperAdmin OR active tenant status"
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- "Seed uses findFirst+create instead of upsert for super-admin: PostgreSQL treats NULL != NULL in unique constraints, so upsert on [email, tenantId] with null tenantId creates duplicates"
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- "Added @types/jest to fix TypeScript type errors for Vitest globals (describe/it/expect)"
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patterns-established:
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- "Auth pattern: getCurrentUser() in Server Components, useSession() in Client Components"
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- "Protected route pattern: middleware handles redirect to /login; individual pages can also call getCurrentUser() for extra safety"
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- "Dashboard layout pattern: (dashboard) route group has Header + main layout; (auth) group has centered card layout"
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duration: 8min
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completed: 2026-03-04
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---
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# Phase 1 Plan 02: Authentication Summary
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**NextAuth.js v4 credentials auth with JWT carrying tenantId+roles, /login page, route protection middleware, and idempotent seed data for demo tenant + admin + super-admin users**
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## Performance
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- **Duration:** 8 min
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- **Started:** 2026-03-04T10:34:59Z
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- **Completed:** 2026-03-04T10:42:58Z
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- **Tasks:** 2 completed
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- **Files modified:** 15
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## Accomplishments
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- NextAuth.js v4 configured with CredentialsProvider — email/password auth with bcrypt verification, JWT sessions that embed tenantId and roles for stateless multi-tenancy
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- Route protection middleware (withAuth) blocks all non-public routes and redirects unauthenticated users to /login; TypeScript types extended for full session typing
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- Login page UI at /login with form validation, error display, loading state, and post-login redirect to /dashboard; Header component with Sign out button in authenticated layout
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- Seed script creates Demo ISP tenant + admin@demo.com (ADMIN role) + superadmin@netforge.com (isSuperAdmin, no tenant) using upsert/idempotent pattern
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- 8 unit tests for authOptions configuration and JWT/session callback behavior — all passing
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## Task Commits
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1. **Task 1: NextAuth.js configuration with credentials provider and JWT** - `71a9277` (feat)
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2. **Task 2: Login page UI, logout flow, seed script, and auth unit tests** - `3c37cb1` (feat)
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**Plan metadata:** (to be added in final commit)
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## Files Created/Modified
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- `src/types/next-auth.d.ts` - Extended NextAuth Session and JWT types with tenantId, roles, isSuperAdmin, firstName, lastName
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- `src/lib/auth-options.ts` - NextAuthOptions: CredentialsProvider, JWT callback, session callback, 24h maxAge
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- `src/lib/auth.ts` - Server helpers: getServerSession() and getCurrentUser()
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- `src/app/api/auth/[...nextauth]/route.ts` - NextAuth GET/POST route handler
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- `src/middleware.ts` - withAuth middleware protecting all routes except /login /signup /api/auth/* /_next/*
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- `src/app/(auth)/layout.tsx` - Centered auth card layout
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- `src/app/(auth)/login/page.tsx` - Login form with email/password, error, loading state, sign up link
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- `src/app/(dashboard)/layout.tsx` - Dashboard layout with Header component
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- `src/app/(dashboard)/dashboard/page.tsx` - Basic dashboard page (post-login landing)
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- `src/components/layout/header.tsx` - Authenticated header with user name + Sign out button
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- `src/components/providers.tsx` - SessionProvider wrapper for client-side useSession()
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- `prisma/seed.ts` - Idempotent seed: Demo ISP tenant, admin user, super-admin user
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- `src/lib/__tests__/auth.test.ts` - 8 unit tests for authOptions
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- `package.json` - Added db:seed script, prisma.seed config, tsx devDependency
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- `src/app/layout.tsx` - Wrapped children with Providers (SessionProvider)
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## Decisions Made
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- **NextAuth v4 over v5:** v5/Auth.js credentials provider support is still evolving; v4 is the stable production choice for custom JWT + credentials auth
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- **JWT carries tenantId + roles:** No database lookup on each request — token is self-contained. 24h maxAge balances security and UX
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- **Super-admin authorize logic:** Uses `OR [{ isSuperAdmin: true }, { tenant: { status: ACTIVE } }]` in Prisma query — one query handles both cases
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- **Seed uses findFirst+create for super-admin:** PostgreSQL unique constraint on `(email, tenantId)` with `tenantId=null` means `NULL != NULL` — upsert where clause would create duplicate rows; findFirst+create is explicit and safe
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- **@types/jest installed:** Vitest globals (`describe`, `it`, `expect`) with `globals: true` config are compatible with @types/jest type definitions, fixing TypeScript errors without needing separate vitest type package
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## Deviations from Plan
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### Auto-fixed Issues
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**1. [Rule 3 - Blocking] Added @types/jest for Vitest globals TypeScript support**
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- **Found during:** Task 1 (TypeScript check after creating auth files)
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- **Issue:** `npx tsc --noEmit` reported errors in setup.test.ts — `describe`, `it`, `expect` unknown without type definitions. Vitest's `globals: true` config works at runtime but TypeScript needs explicit types
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- **Fix:** `npm install -D @types/jest` — compatible with Vitest's global API
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- **Files modified:** package.json, package-lock.json
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- **Verification:** `npx tsc --noEmit` passes with no errors in auth files
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- **Committed in:** 71a9277 (Task 1 commit)
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**2. [Rule 2 - Missing Critical] Added SessionProvider in root layout**
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- **Found during:** Task 2 (creating Header component with useSession)
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- **Issue:** `useSession()` in Header component requires SessionProvider ancestor — not in the plan but required for the header to function
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- **Fix:** Created `src/components/providers.tsx` as "use client" SessionProvider wrapper; added to root `src/app/layout.tsx`
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- **Files modified:** src/components/providers.tsx, src/app/layout.tsx
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- **Verification:** TypeScript check passes; useSession available in all client components
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- **Committed in:** 3c37cb1 (Task 2 commit)
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**3. [Rule 2 - Missing Critical] Created basic /dashboard page**
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- **Found during:** Task 2 (login redirects to /dashboard which didn't exist)
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- **Issue:** Login success redirects to `/dashboard` but no page existed — would 404 or error
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- **Fix:** Created `src/app/(dashboard)/dashboard/page.tsx` with welcome message and user info display
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- **Files modified:** src/app/(dashboard)/dashboard/page.tsx
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- **Verification:** Route exists; getCurrentUser() used for server-side auth guard
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- **Committed in:** 3c37cb1 (Task 2 commit)
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---
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**Total deviations:** 3 auto-fixed (1 blocking, 2 missing critical)
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**Impact on plan:** All three fixes were essential for functionality and type safety. No scope creep — the SessionProvider and dashboard page are minimal stubs supporting the auth flow.
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## Issues Encountered
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- Test file type casting for NextAuth callback parameters required `as unknown as` double-casting due to strict overlap checking between custom User type and NextAuth's internal AdapterUser type — resolved by casting through unknown
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- `prisma-tenant.ts` from parallel plan 01-03 has TypeScript errors (unrelated to this plan's files) — confirmed by running `npx tsc 2>&1 | grep "^src" | grep -v prisma-tenant` which shows 0 errors in auth files
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## User Setup Required
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None - no external service configuration required. NEXTAUTH_SECRET and NEXTAUTH_URL are already in `.env`.
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## Next Phase Readiness
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- Auth is fully functional. getCurrentUser() available for all Server Components in Phase 2+
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- Seed data ready: admin@demo.com / admin123, superadmin@netforge.com / super123
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- JWT token carries tenantId and roles — plan 01-03 (tenant provisioning) and all future plans can read these from session without extra DB queries
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- Middleware protects all routes — future plans can add routes without worrying about auth
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---
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*Phase: 01-foundation*
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*Completed: 2026-03-04*
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