What problem does it solve? Avalonia and MAUI projects often accumulate hardcoded colors, fonts, and spacing scattered across AXAML files, making theming inconsistent and maintenance painful. This Skill performs a structured architecture review that identifies these issues and produces a phased migration plan toward a token-based design system. ## Core Features & Use Cases - Design Token Extraction: Detects hardcoded colors, font sizes, and spacing in AXAML files and organizes them into centralized token files (Colors, Typography, Spacing, Elevation). - Version-Specific Review: Detects whether the project targets Avalonia 11.x or 12.x and applies appropriate checks, such as compiled bindings (x:DataType), accessibility properties, and page-based navigation for v12. - Migration Planning: Produces a four-phase migration plan (token extraction, style consolidation, control isolation, project splitting) with risk levels and rollback strategies. - Use Case: A team inheriting a legacy Avalonia 11 app with hardcoded hex colors in every view can run this review to get an assessment, a target folder structure, and step-by-step guidance to adopt a light/dark theme system and plan the upgrade to Avalonia 12. ## Quick Start Ask the assistant to review your Avalonia project structure and suggest design token and theming improvements.