Goals
Who the product helps, what they need and how success will be judged.
Design Contracts
Keep the important decisions clear.
A Design Contract records the product decisions that should remain true as people design, build and improve an interface.
Design language
Brand meaning, tokens, typography, components and content rules.
Behaviour
Interactions, states, permissions, responsive behaviour and important edge cases.
Accessibility
The keyboard, focus, contrast, zoom, motion and assistive-technology behaviour the product requires.
Reasons
The evidence or product need behind important decisions, including known uncertainty.
Provenance
Sources, licences and AI involvement when they affect what can be reused or shipped.