Analyze Stitch projects and synthesize a semantic design system into DESIGN.md files
Permissions
Files
SKILL.md
design-md
Analyze Stitch projects and synthesize a semantic design system into DESIGN.md files
allowed-tools
stitch*:*, Read, Write, web_fetch
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
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:
Namespace discovery: Run list_tools to find the Stitch MCP prefix. Use this prefix (e.g., mcp_stitch:) for all subsequent calls.
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)
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
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
Asset download:
Use web_fetch or read_url_content to download the HTML code from htmlCode.downloadUrl
Optionally download the screenshot from screenshot.downloadUrl for visual reference
Parse the HTML to extract Tailwind classes, custom CSS, and component patterns
Project metadata extraction:
Call [prefix]:get_project with the project name (full path: projects/{id}) to get:
designTheme object with color mode, fonts, roundness, custom colors
Project-level design guidelines and descriptions
Device type preferences and layout principles
Analysis & Synthesis Instructions
1. Extract Project Identity (JSON)
Locate the Project Title
Locate the specific Project ID (e.g., from the name field in the JSON)
2. Define the Atmosphere (Image/HTML)
Evaluate the screenshot and HTML structure to capture the overall "vibe." Use evocative adjectives to describe the mood (e.g., "Airy," "Dense," "Minimalist," "Utilitarian").
3. Map the Color Palette (Tailwind Config/JSON)
Identify the key colors in the system. For each color, provide:
A descriptive, natural language name that conveys its character (e.g., "Deep Muted Teal-Navy")
The specific hex code in parentheses for precision (e.g., "#294056")
Its specific functional role (e.g., "Used for primary actions")
4. Translate Geometry & Shape (CSS/Tailwind)
Convert technical border-radius and layout values into physical descriptions:
Describe rounded-full as "Pill-shaped"
Describe rounded-lg as "Subtly rounded corners"
Describe rounded-none as "Sharp, squared-off edges"
5. Describe Depth & Elevation
Explain how the UI handles layers. Describe the presence and quality of shadows (e.g., "Flat," "Whisper-soft diffused shadows," or "Heavy, high-contrast drop shadows").
Output Guidelines
Language: Use descriptive design terminology and natural language exclusively
Format: Generate a clean Markdown file following the structure below
Precision: Include exact hex codes for colors while using descriptive names
Context: Explain the "why" behind design decisions, not just the "what"
Output Format (DESIGN.md Structure)
# Design System: [Project Title]**Project ID:** [Insert Project ID Here]
## 1. Visual Theme & Atmosphere
(Description of the mood, density, and aesthetic philosophy.)
## 2. Color Palette & Roles
(List colors by Descriptive Name + Hex Code + Functional Role.)
## 3. Typography Rules
(Description of font family, weight usage for headers vs. body, and letter-spacing character.)
## 4. Component Stylings***Buttons:** (Shape description, color assignment, behavior).
***Cards/Containers:** (Corner roundness description, background color, shadow depth).
***Inputs/Forms:** (Stroke style, background).
## 5. Layout Principles
(Description of whitespace strategy, margins, and grid alignment.)
Usage Example
To use this skill for the Furniture Collection project:
Retrieve project information:
Use the Stitch MCP Server to get the Furniture Collection project
Get the Home page screen details:
Retrieve the Home page screen's code, image, and screen object information
Reference best practices:
Review the Stitch Effective Prompting Guide at:
https://stitch.withgoogle.com/docs/learn/prompting/
Analyze and synthesize:
Extract all relevant design tokens from the screen
Translate technical values into descriptive language
Organize information according to the DESIGN.md structure
Generate the file:
Create DESIGN.md in the project directory
Follow the prescribed format exactly
Ensure all color codes are accurate
Use evocative, designer-friendly language
Best Practices
Be Descriptive: Avoid generic terms like "blue" or "rounded." Use "Ocean-deep Cerulean (#0077B6)" or "Gently curved edges"
Be Functional: Always explain what each design element is used for
Be Consistent: Use the same terminology throughout the document
Be Visual: Help readers visualize the design through your descriptions
Be Precise: Include exact values (hex codes, pixel values) in parentheses after natural language descriptions
Tips for Success
Start with the big picture: Understand the overall aesthetic before diving into details
Look for patterns: Identify consistent spacing, sizing, and styling patterns
Think semantically: Name colors by their purpose, not just their appearance
Consider hierarchy: Document how visual weight and importance are communicated
Reference the guide: Use language and patterns from the Stitch Effective Prompting Guide
Common Pitfalls to Avoid
❌ Using technical jargon without translation (e.g., "rounded-xl" instead of "generously rounded corners")
❌ Omitting color codes or using only descriptive names
❌ Forgetting to explain functional roles of design elements
❌ Being too vague in atmosphere descriptions
❌ Ignoring subtle design details like shadows or spacing patterns
