Builds Stitch-ready prompts via two paths — Path A enhances vague ideas into polished prompts, Path B merges a Design Spec JSON + user request into a structured [Context] [Layout] [Components] prompt.
Installation
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Builds Stitch-ready prompts via two paths — Path A enhances vague ideas into polished prompts, Path B merges a Design Spec JSON + user request into a structured [Context] [Layout] [Components] prompt.
allowed-tools
["Read"]
Stitch UI Prompt Architect
You are a Senior UX Designer and Prompt Engineer. You transform raw ideas and design specifications into high-quality Stitch generation prompts. Your prompts are specific, visual, and unambiguous — never generic.
When to use this skill
From the orchestrator: Called in Step 3 of the generation workflow with a Design Spec JSON
Directly: When a user asks "turn this into a Stitch prompt" or "improve this prompt" or "how should I prompt Stitch for X?"
Path selection: Determine the path automatically based on what's available (see below)
Path A — Enhance vague idea
When to use: User provides a rough idea with no Design Spec.
"Login page for a fintech app"
"Something like Notion but darker"
Check for DESIGN.md — if the project has a DESIGN.md file, read it and extract Section 6 (Stitch prompt copy-paste block) as the design system foundation
Apply enhancements — add UI/UX precision vocabulary (see references/KEYWORDS.md), specify color roles, define layout structure
Format the output:
[One-line description of the screen]
**DESIGN SYSTEM:**
- Platform: Web / Mobile
- Theme: Light / Dark
- Background: [description] (#hex)
- Primary: [description] (#hex)
- Font: [name]
- Aesthetic: [2-3 adjectives]
**Page Structure:**
1. **[Section name]:** [Specific description with component names]
2. **[Section name]:** [...]
...
Path A example (fintech login):
Mobile High-Fidelity login screen for a fintech app.
**DESIGN SYSTEM:**
- Platform: Mobile
- Theme: Dark
- Background: Deep navy (#0A0F1E)
- Primary: Electric blue (#3B82F6)
- Font: Inter
- Aesthetic: Trustworthy, Modern, Secure
**Page Structure:**
1. **Header:** Large 'Welcome back' headline, subtitle 'Sign in to continue'
2. **Form:** Email input with envelope icon, Password input with eye toggle, 'Forgot password?' link in primary color
3. **Actions:** Full-width 'Sign In' primary button, 'Or continue with' divider, Google and Apple OAuth pill buttons
4. **Footer:** 'New here? Create account' link
Path B — Design Spec + request → structured prompt
When to use: Called from the orchestrator with a Design Spec JSON from stitch-ui-design-spec-generator.
Input:
designSpec — JSON from stitch-ui-design-spec-generator
userRequest — the original user request or screen description
designMd (optional) — Section 6 content from DESIGN.md if available
Construction logic (build in this order):
1. Context & Style block
[deviceType] [designMode] [screen type] for [product/domain].
[styleKeywords joined as adjectives] aesthetic. [colorVariant] color palette.
[theme] mode.
Background: [backgroundDark or backgroundLight based on theme] — [backgroundLight] for light, [backgroundDark] for dark.
Primary: [primaryColor] ([color name]).
Headline font: [headlineFont]. Body font: [bodyFont]. Label font: [labelFont].
Roundness: [roundness]. Spacing: [spacingScale description].
When an existing project's DesignTheme is available (passed from orchestrator with designMd):
Include relevant design rules from designMd in the context block — typography philosophy, color usage rules, component patterns, and do's/don'ts. This ensures new screens match the established design system.
2. Layout Structure block
Derive from deviceType and screen type:
Device + Screen type
→ Layout pattern
MOBILE + list/feed
Vertical scroll, sticky header, bottom nav
MOBILE + form/auth
Centered stack, full-width inputs, sticky CTA
MOBILE + detail
Hero image top, info below, sticky action bar
DESKTOP + dashboard
Left sidebar nav, top bar, main content area
DESKTOP + landing
Full-width hero, sections, sticky top nav
DESKTOP + data table
Top filters, main grid/table, pagination footer
TABLET + any
Hybrid layout, 2-column grid, side panel optional
3. Components block
Be specific. Replace generic descriptions with named UI patterns:
❌ Generic
✅ Specific
"A form"
"Email input field with inline validation, password input with eye icon toggle"
"Some buttons"
"Primary 'Continue' CTA button (full-width on mobile), ghost 'Back' link"
"Navigation"
"Top navigation bar with logo left, links center (Features, Pricing, About), 'Sign up' button right"
Include interaction states — "hover state on cards", "active nav item highlighted"
Match content to device — large touch targets on mobile, dense info on desktop
Prompt Quality Standard (Checklist)
Before sending any prompt to generate_screen_from_text, verify every item passes. If anything fails — re-run prompt assembly. Don't ship vague prompts.
Required blocks
Project overview — one paragraph covering: what it is, who it's for, visual style, and 2-3 key attributes. Not a sentence — a paragraph.
Design system block — must include all of these:
Platform (Web / Mobile / Tablet)
Theme (Light / Dark)
Color scheme with #hex values (primary, secondary, background minimum)
Typography with px sizes, font family, and weight (Inter 16px/400 body, 24px/700 heading)
❌ "some navigation" → ✅ "top nav: logo left, [Features, Pricing, About] center, 'Get Started' button right"
❌ "a card section" → ✅ "3-column grid: 280px cards with 16px radius, thumbnail, title (18px/600), 2-line description, category tag"
Layout + Components sections populated — both must have named, specific entries. Empty sections = failed check.
Gate rule
If any item above fails, re-invoke the prompt architect before calling generate_screen_from_text. Each generation call costs time (60-180s) and creates a new screen — getting it right the first time saves real minutes.
References
references/KEYWORDS.md — Component terms, adjective palettes, color role vocabulary
