product-design

Decides what an interface should do before UI is built or audited: interaction choice, action scope and consequence, reachable states, resilience, and accessibility as task completion. Works from a brief, spec, mockup, intent, or existing UI. Use when asked "is this the right interaction", "design the flow", "what control should this use", "what should this action affect", "which states should this have", "make this resilient", or "what breaks here". For building or styling use ui-design; for built-code audits use ui-audit; for copy wording use copywriting.