Theme Packs
Theme Contract
Theme packs target shared tokens, bridge variables, and class names. This keeps theme behavior portable across the editor, renderer, host, and extension views.
Theme Studio
The Theme Studio extension provides a first-party authoring workflow for inspecting tokens, previewing editor and renderer changes, applying draft values, reverting them, and exporting theme artifacts.
Viewport Contract
Viewport and aspect-ratio breakpoints stay defined once in the client viewport contract. Themes can style each band, but they do not redefine the responsive taxonomy.