Keep the beginner prelude focused on generated authoring primitives by leaving page-boundary rendering as an explicit helper instead of a glob-import default.
req: dx/006
req: public_api/005
Move generated metadata tokens behind a hidden compatibility export and tighten the public contract test so the beginner prelude stays focused on generated authoring, Html, forms, navigation, and IntoEffect.
req: dx/006
req: public_api/005
Close the fallible handler and example coherence slice: v0 uses typed todo newtypes, Result handler failure mapping, generated form/partial helpers, and page composition; kanban is explicitly marked as an advanced north-star milestone; raw render is isolated behind hemx::advanced::render.
req: canonical_authoring/003
req: failure/004
req: public_api/005
req: examples/004