Status: IN
Decorator's demonstrated applicability beyond visual UI (I/O stream decoration, semantic AST actions, state transitions, attribute tags) validates that the 'embellishment' concept is genuinely abstract — not a visual metaphor but a general principle of responsibility augmentation through wrapping, confirming that Decorator's compositional niche is domain-independent.
Decorator's cross-domain evidence confirms embellishment as an abstract compositional principle, not a UI metaphor
Depends on (SL): decorator-applies-beyond-ui-streams, decorator-embellishment-broader-meaning, decorator-distinct-compositional-niche