What problem does it solve? Android screens often ship with inconsistent spacing, undersized touch targets, missing accessibility semantics, and Material 2/3 component mixing. This Skill provides a single reference of Material Design 3 UX rules plus a 10-category compliance audit so screens feel native, accessible, and responsive before release. ## Core Features & Use Cases - M3 UX Guidelines: Concrete rules for touch targets (48dp), 8dp spacing grids, navigation patterns (Bottom Bar / Rail / Drawer), safe-area insets, animation timing tokens, and form input configuration with Kotlin Compose examples. - Adaptive & Foldable Layouts: Guidance for window size classes, canonical layouts (Feed, List-Detail, Supporting Pane), and foldable postures using WindowManager FoldingFeature. - M3 Compliance Audit: A 10-category scoring checklist (color tokens, typography, shape, elevation, components, layout, navigation, motion, accessibility, theming) with grep commands to detect hardcoded colors, corner radii, and M2 imports. - Use Case: Before shipping a new Compose screen, run the audit to catch M2 component contamination, missing contentDescriptions, and contrast violations, then fix each Partial/Fail item. ## Quick Start Review this Compose screen for Material Design 3 compliance and list the issues found in each audit category.