Brief a product interface

Produce a buildable interface specification grounded in an accepted product flow. Do not render or invent product behavior unless the user separately asks for implementation.

Prove the source flow

Identify the flow, platforms, surfaces, nodes, decisions, and states this brief implements. If no usable flow exists, return to map-user-flow.

Every screen, component, state, and action must trace to a flow node, edge, native platform requirement, or explicit product decision. Do not add speculative dashboards or settings.

Define the interface system

Specify: