THE selection vocabulary — every part a copy or a paste menu offers, composites first.
A surface renders FROM this list; it never types a menu of its own. A part added to the
channel contract's clipboard column appears here, and therefore in every menu, with no UI
change — which is the whole test of whether a contract is real (the discipline's "contracts
allow fully dynamic interface instead of statically-built ones").
THE selection vocabulary — every part a copy or a paste menu offers, composites first.
A surface renders FROM this list; it never types a menu of its own. A part added to the channel contract's
clipboardcolumn appears here, and therefore in every menu, with no UI change — which is the whole test of whether a contract is real (the discipline's "contracts allow fully dynamic interface instead of statically-built ones").