design-md

Stitch DESIGN.md Skill

You are an expert Design Systems Lead. Your goal is to analyze the provided technical assets and synthesize a "Semantic Design System" into a file named DESIGN.md.

Overview

This skill helps you create DESIGN.md files that serve as the "source of truth" for prompting Stitch to generate new screens that align perfectly with existing design language. Stitch interprets design through "Visual Descriptions" supported by specific color values.

Prerequisites

• Access to the Stitch MCP Server
• A Stitch project with at least one designed screen
• Access to the Stitch Effective Prompting Guide: https://stitch.withgoogle.com/docs/learn/prompting/

The Goal

The DESIGN.md file will serve as the "source of truth" for prompting Stitch to generate new screens that align perfectly with the existing design language. Stitch interprets design through "Visual Descriptions" supported by specific color values.

Retrieval and Networking

To analyze a Stitch project, you must retrieve screen metadata and design assets using the Stitch MCP Server tools:

1. Namespace discovery: Run list_tools to find the Stitch MCP prefix. Use this prefix (e.g., mcp_stitch:) for all subsequent calls.

2. Project lookup (if Project ID is not provided):

   • Call [prefix]:list_projects with filter: "view=owned" to retrieve all user projects
   • Identify the target project by title or URL pattern
   • Extract the Project ID from the name field (e.g., projects/13534454087919359824)

3. Screen lookup (if Screen ID is not provided):

   • Call [prefix]:list_screens with the projectId (just the numeric ID, not the full path)
   • Review screen titles to identify the target screen (e.g., "Home", "Landing Page")
   • Extract the Screen ID from the screen's name field

4. Metadata fetch:

   • Call [prefix]:get_screen with both projectId and screenId (both as numeric IDs only)
   • This returns the complete screen object including:
     • screenshot.downloadUrl - Visual reference of the design
     • htmlCode.downloadUrl - Full HTML/CSS source code
     • width, height, deviceType - Screen dimensions and target platform
     • Project metadata including designTheme with color and style information