Craft principle

State coverage.

Universal rules for what every interactive surface must render. The active DESIGN.md decides how each state looks; this file decides which states must exist and what they must contain. The single most reliable AI-design failure is shipping only the populated state.

Read the full rule on GitHub

Other craft principles

Accessibility baseline Universal rules for the legal floor of accessibility plus the craft commitments that go beyond it. The active DESIGN.md decides brand appearance; this file decides which rules an artifact has to clear before it ships.
Animation discipline Universal rules for when motion earns its place in a UI and what numbers constrain it. The active DESIGN.md decides brand-specific motion personality; this file decides whether motion should run at all and at what duration, easing, and accessibility floor.
Anti-AI-slop rules Concrete, checkable rules that distinguish "designed by a human who has shipped product" from "default LLM output." Several rules below are auto-enforced by the daemon's lint-artifact linter — failing an enforced rule is not a style preference, it is a regression. The rest are guidance for agents and reviewers and are flagged inline as "(guidance, not auto-checked)" so the contract with the linter stays honest.
Color Universal color rules applied on top of the active DESIGN.md. The design system supplies the palette tokens; this file enforces how to use them.