The content layer. Never the layout.

Your client writes in an admin that already knows their content types, their fields and their brand. Nothing about it is bespoke — what differs between sites is data.

Every field becomes a generated type, regenerated whenever the schema changes. Add a field today and it is in the payload immediately — because every read returns the whole record, and nothing enumerates fields at fetch time.

Yours, entirely. The CMS emits data and a way to fetch it — never markup, never layout. Every site is its own Worker with its own database: if the CMS went dark, the site would not notice.