Match surrounding design-system density. Verify on a real render, not a description of the UI. Essential meaning has a visual or textual path — audio, haptics, and color never carry unique required state. A happy-path mock is not the flow.
Open interface craft rules for hierarchy. Open states, forms, and recovery for stateful flows. Open responsive mobile and input for layout. Open sensory feedback when sound, haptics, camera, or effects matter.
Use ui-review to judge an existing render. Use accessibility-conformance for a conformance claim.