Shared packages

Reusable infrastructure lives under packages/. Apps depend on these; apps never depend on each other.

Package	Purpose
@constellation-platform/auth-core	JWT types, clearance levels, permission checking
@constellation-platform/auth-next	Next.js auth middleware (withAuth, withTenantAuth)
@constellation-platform/db	Tenant-scoped Prisma client, audit trail
@constellation-platform/errors	Standard error hierarchy and API envelope
@constellation-platform/audit	Transactional audit via outbox (auditCritical())
@constellation-platform/events	Outbox-based event publishing and subscription
@constellation-platform/testing	Test tenant/user factories, test transaction wrapper
@constellation/contracts	Shared Zod schemas and derived types
@constellation/ui	Shared React components
@constellation/config	Shared ESLint, TypeScript, Vitest configs

Stub — per-package API docs to be added in follow-up PRs.