Custom Type Registration
Kind: algorithm
Record: algorithms:custom-type-registration
Canonical: Algorithms
Closure: Dependencies in load order
Extend the stylable element vocabulary beyond the native HTML tag set by registering each semantic type against a base tag and a `data-el` stamp; the registered type becomes a first-class node the globals layer binds one appearance contract to, so a concept no native tag can express — a field-label, an icon, a toast, an entry — is styled by its type, never by a class.
Listed in Algorithm contracts, after Type-Keyed Appearance and before Governed Construction Boundary.