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agentic-dev-template/docs/decisions/adr-003-cms-separation.md

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ADR-003: CMS Core + CMS Client Separation

Status: Accepted

Context

Payload CMS needs to integrate with clean architecture without creating circular dependencies.

Decision

Three packages: @repo/cms-core (config + collections), @repo/cms-client (standalone typed client), apps/cms (thin shell).

Rationale

  • cms-core is testable independently — collections are just config objects
  • cms-client is standalone (no internal imports) — prevents circular deps
  • apps/cms is almost empty — just boots Next.js with cms-core's config
  • Payload instance injected into cms-client, not imported — app startup code wires them

Circular Dependency Prevention

apps/cms → @repo/cms-core → @repo/core/application (hooks)
@repo/core/infrastructure → @repo/cms-client (standalone)

No cycles because cms-client never imports from cms-core or core.

Status: Partially superseded by v2 (2026-05-04)

v1 advocated @repo/cms-core as a single CMS package. v2 splits this into:

  • @repo/core-cms — composition only (assembles feature CMS schemas)
  • Each feature owns its own collections/globals under packages/<feature>/src/integrations/cms/

Rationale: vertical-feature ownership scales better; CMS schema lives with the business code that needs it. See ADR-006.