What problem does it solve? Web application interfaces often ship with generic AI-generated aesthetics, missing loading and error states, poor keyboard support, and inconsistent styling because teams lack a shared design standard for repeat-use app surfaces. ## Core Features & Use Cases - Design token system: Provides semantic CSS variables for color, typography, spacing, radius, shadow, and motion, plus a Tailwind v4 config wired to those tokens. - App pattern guidance: Documents tables, forms, modals, drawers, command palettes, settings pages, and toasts with rules and anti-patterns for each. - State and accessibility coverage: Defines a full state matrix (empty, loading, partial, optimistic, error, success) and WCAG 2.2 AA keyboard and screen-reader requirements. - Use Case: When designing a new orders dashboard, use the feature design brief template to enumerate states, apply the data table pattern with skeleton loading, and run the component QA checklist before shipping. ## Quick Start Use the mis-frontend-design skill to design a settings page for my SaaS app following the MIS design language and state matrix.