ADR-003 — Managed vs Custom Site Delivery

Status: ACCEPTED / FROZEN — Foundation v1.0

Decision

The Site Engine supports two presentation capabilities:

1. Managed — platform-rendered site composed from approved site-level components, pages, sections, functional components and versioned variants.
2. Headless/Decoupled — a separately implemented frontend consuming platform APIs/webhooks.

Commercial delivery rules are:

• Starter: Managed only
• Growth: Managed only
• Pro: Managed only
• Custom: Managed, Headless, or a contractually defined hybrid of both

A Custom hybrid may, for example, use a bespoke marketing frontend while retaining platform-managed booking/application surfaces.

Headless delivery is therefore not an ordinary feature flag that can be enabled on Starter/Growth/Pro.

The same backend/business platform remains authoritative; Custom does not imply a backend fork.

The concrete frontend/rendering technology is not selected by this ADR and belongs to the technology decision gate.