Stitch Loop

Stitch Build Loop

You are an autonomous website builder that generates a multi-page Symbiote.js SPA through iterative Stitch screen generation.

Overview

The Build Loop pattern enables continuous, autonomous website development through a "baton" system. Each iteration:

1. Reads the current task from a baton file (next-prompt.md)
2. Generates a page using Stitch MCP tools
3. Converts HTML to a Symbiote.js page component
4. Integrates the page into the SPA with AppRouter
5. Writes the next task to the baton file for the next iteration

Prerequisites

Required:

• Access to the Stitch MCP Server
• Access to the Project Graph MCP Server
• A Stitch project (existing or will be created)
• A DESIGN.md file (generate one using the design-md skill if needed)
• A SITE.md file documenting the site vision and roadmap

Optional:

• Browser tool — enables visual verification of generated pages

The Baton System

The next-prompt.md file acts as a relay baton between iterations:

---
page: about
route: /about
---
An about page describing the team and mission.

**DESIGN SYSTEM (REQUIRED):**
[Copy from DESIGN.md Section 5]

**Page Structure:**
1. Header with navigation
2. Team member grid with avatar cards
3. Mission statement section
4. Footer with links

Critical rules:

• The page field determines the component and file name
• The route field sets the AppRouter path pattern
• The prompt must include the design system block from DESIGN.md
• You MUST update this file before completing to continue the loop

Execution Protocol

Step 1: Read the Baton

Parse next-prompt.md to extract:

• Page name from page frontmatter
• Route path from route frontmatter
• Prompt content from the markdown body

Step 2: Consult Context Files

Before generating, read these files:

| File | Purpose | |------|---------| | SITE.md | Site vision, Stitch Project ID, existing pages (sitemap), roadmap | | DESIGN.md | Required visual style and CSS custom properties for Stitch prompts |

Important checks:

• Section 4 (Sitemap) — Do NOT recreate pages that already exist
• Section 5 (Roadmap) — Pick tasks from here if backlog exists
• Section 6 (Creative Freedom) — Ideas for new pages if roadmap is empty

Step 3: Generate with Stitch

1. Discover namespace: Run list_tools to find the Stitch MCP prefix
2. Get or create project:

• If stitch.json exists, use the projectId from it
• Otherwise, call [prefix]create_project and save the ID to stitch.json

1. Generate screen: Call [prefix]generate_screen_from_text with:

• projectId: The project ID
• prompt: The full prompt from the baton (including design system block)
• deviceType: DESKTOP (or as specified)

1. Retrieve assets: Call [prefix]get_screen to get:

• htmlCode.downloadUrl — Download and save as queue/{page}.html
• screenshot.downloadUrl — Download and save as queue/{page}.png

Step 4: Convert to Symbiote Component

Transform the Stitch HTML into a Symbiote.js page component:

1. Create triple-file structure:

`` src/pages/{PageName}/ ├── {PageName}.js ├── {PageName}.tpl.js └── {PageName}.css.js ``

1. Extract colors and values → map to CSS custom properties from DESIGN.md
2. Convert inline styles and framework classes to native CSS using custom properties
3. Use custom element tag names: page-about, page-home, etc.

Step 5: Integrate into SPA

1. Register the page component in the AppRouter routing map:

import { AppRouter } from '@symbiotejs/symbiote/core/AppRouter.js';

const routerCtx = AppRouter.initRoutingCtx('R', {
  home:    { pattern: '/',        title: 'Home', default: true },
  about:   { pattern: '/about',   title: 'About' },
  // Add new page route here
});

1. Add lazy loading for the new page:

{pageName}: {
  pattern: '/{route}',
  title: '{Page Title}',
  load: () => import('./pages/{PageName}/{PageName}.js'),
},

1. Update navigation links across all pages
2. Ensure consistent headers/footers
3. If this is the first page, set up index.html using resources/global-styles-template.md (at project root) — includes CSS reset, font loading, importmap, and design tokens

Step 6: Validate with Project Graph MCP

Run the full validation sequence (see resources/project-graph-workflow.md at project root):

1. get_skeleton(path) — verify page component appears with correct structure
2. get_full_analysis(path) — target Health Score ≥ 80
3. check_custom_rules(path) — auto-detects Symbiote, validates conventions
4. get_undocumented(path) — ensure JSDoc on interactive methods
5. Add @test / @expect annotations to interactive handlers
6. get_pending_tests(path) → execute each test → mark_test_passed(id)
7. Optionally, open in browser to compare against Stitch screenshot

Step 7: Update Site Documentation

Modify SITE.md:

• Add the new page to Section 4 (Sitemap) with [x]
• Update Section 5 (Roadmap) if you completed a backlog item

Step 8: Prepare the Next Baton (CRITICAL)

You MUST update next-prompt.md before completing. This keeps the loop alive.

1. Decide the next page:

• Check SITE.md Section 5 (Roadmap) for pending items
• If empty, pick from Section 6 (Creative Freedom)
• Or invent something new that fits the site vision

1. Write the baton with proper YAML frontmatter:

---
page: achievements
route: /achievements
---
A competitive achievements page showing developer badges and milestones.

**DESIGN SYSTEM (REQUIRED):**
[Copy the entire design system block from DESIGN.md]

**Page Structure:**
1. Header with title and navigation
2. Badge grid showing unlocked/locked states
3. Progress bars for milestone tracking

File Structure Reference

project/
├── stitch.json              # Stitch project ID and metadata
├── DESIGN.md                # Design system (CSS custom properties)
├── SITE.md                  # Site vision, sitemap, roadmap
├── next-prompt.md           # Current baton for the build loop
├── queue/                   # Raw Stitch HTML files (staging area)
│   ├── home.html
│   └── home.png
├── src/
│   ├── app-root.js          # Root component with AppRouter
│   ├── components/          # Shared components (nav, footer)
│   │   ├── AppNav/
│   │   └── AppFooter/
│   └── pages/               # Page components (one per route)
│       ├── Home/
│       │   ├── Home.js
│       │   ├── Home.tpl.js
│       │   └── Home.css.js
│       └── About/
│           ├── About.js
│           ├── About.tpl.js
│           └── About.css.js
└── index.html               # Entry point (see resources/global-styles-template.md)

Common Pitfalls

• ❌ Forgetting to update next-prompt.md — breaks the loop
• ❌ Not including the design system block in prompts — inconsistent designs
• ❌ Creating duplicate pages — always check SITE.md sitemap first
• ❌ Using framework CSS classes in converted components — use native CSS with custom properties
• ❌ Hardcoding routes — use AppRouter with pattern for path-based routing

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: rnd-pro
• Source: rnd-pro/stitch-skills
• License: MIT
• Homepage: https://github.com/rnd-pro/stitch-skills#readme

Install and usage instructions live in the source repository linked above.