Skill: Verify Next.js Full-Stack

Purpose

Systematic verification checklist for the backend layer of a full-stack Next.js project — Drizzle, Auth.js, Route Handlers, Server Actions, Redis, and BullMQ. Use alongside verify-nextjs.md (which covers frontend concerns).

Verification Process

Run through each section. Flag issues as PASS, WARN, or FAIL.

1. Tests

• Tests exist for new/changed services, route handlers, and server actions
• vitest passes with no failures
• Service unit tests mock db/redis, not service functions themselves
• Route handler integration tests cover success and error paths
• Factory functions produce realistic test data (not "test123" placeholders)

2. Database (Drizzle)

• Migrations are generated and match schema changes (drizzle-kit generate)
• No migration conflicts with main branch
• New columns have sensible defaults or are nullable where appropriate
• Indexes exist on fields used in filters/lookups
• Queries use Drizzle query builder — no raw SQL without justification
• Relational queries use with (not manual joins) where appropriate
• All queries are scoped (filtered by user/tenant) — no unscoped data access

3. Route Handlers (API)

• Auth checked via auth() on protected endpoints
• Request bodies validated with Zod before processing
• Response shapes are consistent: { page, count, num_pages, results } for collections, object for singles, { error } for failures
• Appropriate HTTP status codes (201 for creation, 404 for not found, etc.)
• No business logic in handlers — delegated to services
• Pagination configured for list endpoints

4. Server Actions

• "use server" directive at top of file
• Auth checked via auth() before mutations
• Input validated with Zod before processing
• Return ActionResult<T> pattern — not void or raw throws
• revalidatePath / revalidateTag called after mutations
• No redirect() inside try/catch blocks
• No business logic in actions — delegated to services

5. Service Layer

• Business logic lives in server/services/, not in handlers or actions
• Services are plain functions receiving data as arguments
• Services do not import from next/headers or Next.js request APIs
• Service functions are independently testable

6. Auth (Auth.js)

• Auth.js configuration in lib/auth.ts
• Protected routes check auth() — no manual cookie/token parsing
• Middleware matcher correctly identifies public vs protected routes
• Session type extensions in types/next-auth.d.ts if custom fields added
• No sensitive user data stored in session (fetch from DB when needed)

7. Redis & Queues (if applicable)

• Redis keys follow naming convention: {app}:{domain}:{id}
• All cache keys have TTL set — no indefinite caching
• BullMQ job payloads are small and serializable (IDs, not full objects)
• Workers call services — no business logic in job processors
• Failed jobs have retry configuration with exponential backoff

8. Security

• No secrets or API keys in client code or committed to git
• AUTH_SECRET is set and not a default value in production
• Database credentials use environment variables, not hardcoded strings
• User input is validated (Zod) before database operations
• SQL injection prevented (using Drizzle query builder, not raw SQL)
• Rate limiting on sensitive endpoints (login, registration)

9. Development Environment

• docker-compose.yml includes all required services (app, db, redis, worker if full)
• Makefile includes database commands (db-generate, db-migrate, dbshell, dbreset)
• No npm / npx commands used directly on host
• .env.local has all required variables documented
• Migrations can run cleanly from scratch (dbreset + db-migrate)

10. Code Quality

• No commented-out code
• No console.log left in (except workers where it's intentional logging)
• ESLint passes
• TypeScript compiles cleanly (tsc --noEmit)
• Consistent naming conventions (services, actions, routes)

Output

Produce a verification-report.md:

# Verification Report: [Feature/Phase]
Date: [date]
Reviewer: Claude (automated)

## Summary: [PASS/WARN/FAIL]

## Details
### Tests: [PASS/WARN/FAIL]
- [notes]

### Database: [PASS/WARN/FAIL]
- [notes]

### Route Handlers: [PASS/WARN/FAIL]
- [notes]

### Server Actions: [PASS/WARN/FAIL]
- [notes]

### Service Layer: [PASS/WARN/FAIL]
- [notes]

### Auth: [PASS/WARN/FAIL]
- [notes]

### Redis & Queues: [PASS/WARN/FAIL]
- [notes]

### Security: [PASS/WARN/FAIL]
- [notes]

### Dev Environment: [PASS/WARN/FAIL]
- [notes]

### Code Quality: [PASS/WARN/FAIL]
- [notes]

## Issues Found
1. [FAIL] Description + suggested fix
2. [WARN] Description + recommendation

## Recommended Actions
- [ ] Fix: ...
- [ ] Consider: ...