What problem does it solve? Maintaining a consistent visual language across generated screens is difficult when each screen is designed in isolation. This Skill establishes a single source of truth for a project's design language in Stitch, so colors, fonts, and roundness stay consistent across all future screens. ## Core Features & Use Cases - Design System Creation: Generate a DESIGN.md file from existing screens or a plain-language description (e.g., "dark theme, blue and purple, rounded, Inter font"), then upload it to Stitch via the upload script or the upload_design_md MCP tool. - Token Management: Create or update project-level design tokens with create_design_system_from_design_md, covering color mode, fonts, roundness, and color overrides. - Apply to Screens: Use apply_design_system to propagate the design system to selected screen instances, with correct ID handling to avoid invalid argument errors. - Use Case: After generating several app screens in Stitch, extract a design system from the main dashboard screen, confirm the summary with the user, upload it, and apply it to every screen in the project for visual consistency. ## Quick Start Ask the assistant to create a Stitch design system from your project screens and apply it to all screens in the project.