Governed Construction Boundary
Kind: algorithm
Record: algorithms:governed-construction-boundary
Canonical: Algorithms
Closure: Dependencies in load order
Route all DOM creation through one governed factory that resolves a node spec of shape `{ el, variant, size, gap, tone, measure, layout, class, on, children }` against the type, handler, and component registries, maps each axis key to its `data-*` attribute, treats `class` as a gated hook (icon-font glyph, `u-*` utility, or `c-*` component — never bespoke, never appearance), throws on any unknown type, handler, or component, and refuses an inline `style` attribute.
Listed in Algorithm contracts, after Custom Type Registration and before Placement Isolation.