Full App Building

Full app building turns a Design project into a real, running app instead of an inline Alpine/HTML prototype. The source of truth is a live dev server inside a Builder Fusion cloud container — one Builder project branch per design. Screens are URL-backed iframes of that container's dev server, the same model as /visual-edit localhost screens (sourceType: "fusion"), but the container runs remotely instead of on the user's machine.

Flag Gate

This feature is gated by the code boolean FULL_APP_BUILDING_ENABLED in templates/design/shared/full-app.ts, currently false. Check it (or trust that the fusion actions are unavailable/erroring) before proposing this flow. If the flag is off, tell the user full app building isn't enabled yet instead of attempting the actions.