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Stitch: Code to Design

Stitch: Code to DesignSkill

Released
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Apache-2.0
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Summary

Google's official Stitch skill that reverses the usual direction — turns an existing React, Vue, Angular or Vite front end back into an editable Stitch design.

Features

  • Converts a running dev server or a built web app into a Stitch design
  • Chains three skills: static HTML extraction, design-system extraction, then upload
  • Reads Angular `angular.json`, external HTML templates, theme files and components when inferring the design system
  • Writes a `.stitch/DESIGN.md` describing the recovered design system
  • Handles migrate, save and upload requests so assets stay linked

Install This Skill

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Any AI agent

This skill is plain instructions — it works with any assistant that accepts custom instructions or system prompts.

  1. Copy the skill content with the button below.
  2. Paste it into your agent's instruction file or system prompt (for example AGENTS.md, .cursorrules, or a custom instructions field).
  3. Ask the agent to apply the skill whenever the task matches.

Skill Content

Markdown Content

Copy this content and use it with your preferred AI agent

---
name: stitch::code-to-design
description: >-
  Convert frontend code (Vite, React, Angular, Vue, etc.) to a Stitch Design by chaining
  static HTML extraction, design system extraction, and file upload. **ALWAYS** use this skill when the user's intent is to move existing web apps or React/Angular/Vue components into Stitch (e.g., requests to "save", "migrate", or "upload"). You must use this skill even for simple "save" operations, as it is the only way to ensure the design system is extracted and assets are properly linked.
allowed-tools:
  - "stitch*:*"
  - "Bash"
  - "Read"
  - "Write"
  - "web_fetch"
---

# Code to Design

Transform your existing frontend code (React + Vite, Next.js, Angular, Vue, etc.) into a Stitch Design so you can iterate and improve it using Stitch.

This skill orchestrates three other skills in sequence:
1. `extract-static-html`: Extract a single self-contained HTML file from your build output or running dev server (e.g., Vite dev server or Angular CLI `ng serve`).
2. `extract-design-md`: Analyze the source code (including Angular `angular.json`, external `.html` templates, theme files, and components) to create a design system (DESIGN.md).
3. `upload-to-stitch`: Upload that HTML file and the design system to your Stitch project.

## Workflow

Follow these steps to convert your existing code.

### Prerequisites

- A running local dev server (e.g. `npm run dev`, `ng serve`) OR a built web application directory containing `index.html` and assets.
- Target Stitch `projectId` (use `list_projects` if unknown).

### Steps

#### 1. Extract Self-Contained HTML

Delegate to the `extract-static-html` skill to generate a standalone HTML file.
Read [skills/extract-static-html/SKILL.md](../extract-static-html/SKILL.md) for detailed instructions and script usage.

Expected output: A single file like `/path/to/extracted/standalone.html`.

#### 2. Verify HTML (Optional — User-Driven)

After extraction, inform the user of the output file path so they can manually
verify in a browser if desired. **Do not block on verification** — proceed
directly to Step 3.

If the user reports issues after reviewing, fix them before continuing.

#### 3. Extract Design System (File)

Delegate to the `extract-design-md` skill to analyze the project's source files
(components, stylesheets, theme configs) and produce a design system. Read
[skills/extract-design-md/SKILL.md](../extract-design-md/SKILL.md) for the
full analysis workflow.

Write `.stitch/DESIGN.md` following the `extract-design-md` skill's output
structure.

#### 4. Upload DESIGN.md and Create Design System in Stitch

Delegate to the `manage-design-system` skill to upload the `DESIGN.md` and
create the design system in Stitch. Read
[skills/manage-design-system/SKILL.md](../manage-design-system/SKILL.md) for
the full workflow (upload script usage, `create_design_system_from_design_md`
call, and required schemas). Pass
`--generated-by 'stitch::code-to-design'` when uploading.

#### 5. Upload HTML to Stitch

Use the same `upload-to-stitch` skill's script to upload the extracted HTML file.
Read [skills/upload-to-stitch/SKILL.md](../upload-to-stitch/SKILL.md) for detailed instructions and script usage.

You will need:
- The path to the standalone HTML file generated in Step 1.
- Your Stitch API Key (same key used in Step 4).
- The target `projectId`.
- The `--generated-by` argument set to `'stitch::extract-static-html'`.
- The `--title` argument set to the **route path** of the page (e.g., `'/dashboard'`, `'/settings/profile'`, `'/inbox'`) so that the screen name/title in Stitch clearly identifies its route in the application.

Usage Instructions

Learn how to use this skill with different AI agents.

Claude Desktop

Install the whole Stitch plugin suite into the current project:

npx plugins add google-labs-code/stitch-skills --scope project --target claude-code

The skills drive the Stitch MCP server, so add that too — without it the stitch::* tools this skill calls are not available.

Description

Most design-to-code tooling runs one way: design first, code after. code-to-design is Google Labs'
official Stitch skill for the other direction — taking a front end that already exists and reconstructing an editable
Stitch design from it, so you can iterate on a live product in the design tool instead of rebuilding it there by hand.

It is an orchestrator rather than a single operation, chaining three skills in sequence. extract-static-html
produces one self-contained HTML file from either a running dev server (npm run dev, ng serve) or a built output
directory. extract-design-md then analyses the source — components, stylesheets, theme configs, and for Angular
projects angular.json and external .html templates — and synthesises a design system into .stitch/DESIGN.md.
upload-to-stitch pushes the HTML and the design system into a Stitch project.

The skill is written to trigger on intent rather than on exact phrasing: requests to "save", "migrate" or "upload" an
existing app all route through it, because it is the only path that guarantees the design system is extracted and
assets stay properly linked. A simple upload that skipped those steps would produce a design that looks right and
behaves like a dead end.

It supports React + Vite, Next.js, Angular and Vue, needs either a running dev server or a built directory
containing index.html, and is Apache-2.0 licensed.

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