ID:WORK-393Status:ready
Registry-aware block preview in the editor
In block mode, registry-resolved runes — collection, relationships, aggregate, xref, expand, and data-bound sandbox — render as unresolved sentinel shells with no explanation. They resolve in core postProcess against coreData.registry, which the client-side block renderer never runs; RUNTIME_ONLY_TYPES in block-renderer.ts only placeholders nav*. The server already holds the registry and resolvers (the full-page iframe preview uses them), so render these blocks server-side; where that's not possible, show an honest placeholder instead of an empty shell.
Priority:highComplexity:moderateSource:SPEC-096