Semantic Apply 1.4.0

The exclusive DOM-writing stage translates validated intents into known attributes, component contracts, or constrained section order.

Apply ownership

Signals → Policy → Intent → Validator → Guardrails → Semantic Apply → Audit / Undo. Policy, Local AI, Blocks, and Inspector never write adaptation DOM directly.

Example

const result = controller.applyIntent({
  type: 'layout',
  target: { role: 'hero' },
  value: 'split',
  reason: 'available width',
  source: 'policy',
  timestamp: Date.now()
});

Mutation map

Atomic safety

Invalid targets or parameters reject before mutation. Free HTML, CSS text, event handlers, arbitrary attributes, and Shadow DOM internals are never apply surfaces.

After apply

The engine emits velin-adapt-apply, records semantic before/after values, and stores an inverse patch for undo.