A design system is useful when it helps a team build consistent interfaces. A collection of attractive screens is not enough if developers must guess how components behave under real conditions.
Document component behaviour
For each important component, show default, hover, focus, disabled, loading, error and empty states where relevant. Define what happens with long labels, missing images and validation messages.
Describe responsive behaviour explicitly. Which columns stack, what remains visible and how navigation changes should not depend on the developer interpreting a desktop screenshot.
Connect design decisions to content
Set realistic content limits using actual examples. A card designed around a short job title may break when a specialist has a longer designation. Test labels in the languages the product supports.
Include accessibility requirements in the component notes. The W3C forms guidance is a useful reference for labels, instructions and error feedback. These details should travel with the component, not live in a separate forgotten checklist.
Agree on the handover package
Request organised source files, reusable tokens, asset export rules and a map between design components and code components. Identify which assets are licensed for the intended use.
Plan one implementation review using real pages and content. Capture differences as a prioritised list rather than attempting to resolve every issue through scattered messages.
At the end, the team should know how to add a new screen using the system and who approves changes to shared patterns. Ask your product design specialist to include this operating guidance in the scope. It is often what keeps a polished first release from drifting over time.