Stitch Design System

Extract Stitch designs into semantic DESIGN.md files that serve as authoritative references for generating new screens with consistent visual language.

NEVER

• Never use technical CSS values in DESIGN.md without semantic translation — rounded-xl means nothing to Stitch; write "generously rounded corners" so visual intent is clear.
• Never omit hex codes — color names are ambiguous; Ocean-deep Cerulean (#0077B6) enables exact replication, "blue" does not.
• Never omit functional roles — "blue button" is unusable; "Deep Ocean Blue (#0077B6) for primary call-to-action" is actionable.
• Never use unspecific atmosphere words like "modern", "nice", or "clean" — every design is these things; write sensory descriptions like "airy and minimal with generous whitespace" or "dense, information-rich, utilitarian".
• Never name colors by appearance alone — name them by purpose: primary, secondary, destructive, surface, muted.
• Never skip shadows and spacing — these define perceived elevation and hierarchy, which Stitch uses to understand visual weight.

What Makes a Good DESIGN.md

Stitch generates new screens from natural language descriptions. DESIGN.md is the bridge between technical assets (HTML/CSS) and Stitch's language model. The quality of translation directly determines consistency of generated screens.

Good translation:

• Technical: box-shadow: 0 1px 3px rgba(0,0,0,0.08)
• Semantic: "Whisper-soft diffused shadows, barely perceptible, creating gentle elevation"

Poor translation:

• Technical: box-shadow: 0 1px 3px rgba(0,0,0,0.08)
• Semantic: "Light shadow" (too vague for Stitch to reproduce)

Retrieval Workflow

1. Call [prefix]:list_projects (filter: view=owned) — extract numeric Project ID from name field
2. Call [prefix]:list_screens with projectId — identify target screen by title
3. Call [prefix]:get_screen with projectId + screenId — get screenshot.downloadUrl, htmlCode.downloadUrl, designTheme
4. Call [prefix]:get_project with full name path (projects/{id}) — get designTheme object (colors, fonts, roundness)
5. web_fetch the htmlCode.downloadUrl — parse Tailwind classes, custom CSS, component patterns
6. Optionally web_fetch screenshot for visual verification of atmosphere

Semantic Translation Guide

Colors

For each color: Descriptive name conveying character + hex code + functional role.

Deep Muted Teal-Navy (#294056) — primary surface, navigation backgrounds
Warm Ivory (#F5F0E8) — content background, card surfaces
Coral Red (#E84B3A) — destructive actions, error states

Geometry

CSS value	DESIGN.md language
rounded-full	Pill-shaped, fully circular
rounded-2xl	Generously rounded corners
rounded-lg	Subtly rounded corners
rounded-md	Slight corner softening
rounded-none	Sharp, squared-off edges

Elevation / Shadows

CSS value	DESIGN.md language
No shadow	Flat, no elevation distinction
shadow-sm	Whisper-soft diffused shadows
shadow-md	Gentle card elevation
shadow-lg	Pronounced depth, layered UI
shadow-2xl	Heavy, high-contrast drop shadows

Typography

Describe: font family character ("humanist sans-serif with geometric undertones"), weight hierarchy ("bold 700 for headings, regular 400 for body, never medium 500"), letter-spacing ("tight -0.02em tracking on headings").

DESIGN.md Output Format

# Design System: [Project Title]

**Project ID:** [numeric-id]

## 1. Visual Theme & Atmosphere

[2–3 sentences using sensory, evocative language. Capture density, mood, and aesthetic philosophy.]

## 2. Color Palette & Roles

| Name | Hex | Role |
|---|---|---|
| Deep Muted Teal-Navy | #294056 | Primary actions, navigation |
| ... | | |

## 3. Typography Rules

[Font family character, weight usage, letter-spacing, size hierarchy.]

## 4. Component Styling

- **Buttons:** [Shape, color assignment, hover/active behavior]
- **Cards/Containers:** [Corner roundness, background, shadow depth]
- **Inputs/Forms:** [Border style, background, focus ring]

## 5. Layout Principles

[Whitespace strategy, grid alignment, spacing rhythm, margin philosophy.]

Decision: Atmosphere Description

Before writing atmosphere, ask:

• What is the information density? (airy/dense)
• What emotion does it evoke? (calm/energetic/authoritative/playful)
• Who is the audience? (consumer/enterprise/developer)
• What is the visual weight? (lightweight/substantial)

These answers should generate 2–3 specific sentences — not adjective lists.