Penpot Design

Penpot Design Skill

Create, edit, and manipulate designs in Penpot using the connected MCP plugin.

Prerequisites

User must have Penpot MCP Plugin connected to their Penpot project.

Available Tools

| Tool | Purpose | |------|---------| | execute_code | Run JavaScript in Penpot plugin context | | penpot_api_info | Get API docs for types/members | | export_shape | Export shapes as PNG/SVG for inspection | | import_image | Import images as Rectangle fills |

Core Objects

penpot          // Main API: selection, root, library, fonts, viewport
penpotUtils     // Helpers: findShape, findShapes, shapeStructure, setParentXY
storage         // Persistent storage across tool calls

Critical Rules

1. Child Ordering is REVERSED in Flex Layout

For dir="column" or dir="row", the children array order is reversed relative to visual order. First in array = visually last.

2. Use insertChild, NOT appendChild

// ✅ CORRECT - predictable ordering
parent.insertChild(parent.children.length, shape);

// ❌ BROKEN - unpredictable placement
parent.appendChild(shape);  // Don't use for non-flex boards!

Exception: For flex layout boards, use board.appendChild(shape) which inserts at the visual end.

3. Position Properties

shape.x = 100;           // ✅ Writable - absolute page coordinates
shape.y = 200;           // ✅ Writable
shape.parentX;           // ❌ READ-ONLY
shape.parentY;           // ❌ READ-ONLY

// To set relative position:
penpotUtils.setParentXY(shape, relativeX, relativeY);

4. Resize and Dimensions

shape.width;             // ❌ READ-ONLY
shape.height;            // ❌ READ-ONLY
shape.resize(200, 100);  // ✅ Use method to change size

5. Text Sizing

text.fontSize = '24';         // ✅ Changes text size
text.resize(200, 100);        // ❌ Only changes bounding box, not font
text.growType = 'auto-width'; // ✅ Always set after resize for auto-sizing

6. Store Selection Immediately

storage.selection = [...penpot.selection]; // Selection can change!

Workflow

1. Explore Design Structure

// Page overview (depth 3)
return penpotUtils.shapeStructure(penpot.root, 3);

// Store current selection
storage.selection = [...penpot.selection];
return storage.selection.map(s => ({ id: s.id, name: s.name, type: s.type }));

2. Find Elements

// By name
const shape = penpotUtils.findShape(s => s.name === 'Button');

// By type
const texts = penpotUtils.findShapes(s => s.type === 'text', penpot.root);

// Images (including fill images)
const images = penpotUtils.findShapes(
  s => s.type === 'image' || s.fills?.some(f => f.fillImage),
  penpot.root
);

// All boards
const boards = penpotUtils.findShapes(s => s.type === 'board', penpot.root);

3. Create Shapes

// Rectangle
const rect = penpot.createRectangle();
rect.name = 'Card Background';
rect.x = 100; rect.y = 100;
rect.resize(300, 200);
rect.fills = [{ fillColor: '#FFFFFF' }];
rect.borderRadius = 12;

// Text
const text = penpot.createText('Hello World');
text.x = 120; text.y = 120;
text.fontSize = '24';
text.fontFamily = 'Inter';
text.growType = 'auto-width';

// Board (frame/artboard)
const board = penpot.createBoard();
board.name = 'Card';
board.x = 0; board.y = 0;
board.resize(400, 300);
board.fills = [{ fillColor: '#FFFFFF' }];

// Ellipse
const ellipse = penpot.createEllipse();
ellipse.resize(100, 100);

// Path
const path = penpot.createPath();

4. Build Hierarchy

CRITICAL: Add background shapes FIRST, then foreground shapes. Z-order = array order.

const card = penpot.createBoard();
card.resize(300, 200);

// 1. Background first (will be behind)
const bg = penpot.createRectangle();
bg.resize(300, 200);
bg.fills = [{ fillColor: '#F5F5F5' }];
card.insertChild(card.children.length, bg);

// 2. Content on top (will be in front)
const title = penpot.createText('Title');
title.fontSize = '20';
card.insertChild(card.children.length, title);

// Position relative to parent
penpotUtils.setParentXY(bg, 0, 0);
penpotUtils.setParentXY(title, 20, 20);

5. Flex Layout

const container = penpot.createBoard();
container.resize(400, 0);

// Add flex layout (use helper to preserve child order)
const flex = penpotUtils.addFlexLayout(container, 'column');
flex.rowGap = 16;
flex.columnGap = 16;
flex.topPadding = 24;
flex.rightPadding = 24;
flex.bottomPadding = 24;
flex.leftPadding = 24;
flex.alignItems = 'stretch';
flex.justifyContent = 'start';

// For flex boards, appendChild adds at visual end
container.appendChild(item1);
container.appendChild(item2);

// Child sizing within flex
item1.layoutChild.horizontalSizing = 'fill';
item1.layoutChild.verticalSizing = 'auto';

Flex Layout Properties:

• dir: 'row' | 'column' | 'row-reverse' | 'column-reverse'
• alignItems: 'start' | 'center' | 'end' | 'stretch'
• justifyContent: 'start' | 'center' | 'end' | 'stretch' | 'space-between' | 'space-around' | 'space-evenly'
• rowGap, columnGap: number
• topPadding, rightPadding, bottomPadding, leftPadding: number

6. Styling

Fills:

// Solid color
shape.fills = [{ fillColor: '#3B82F6', fillOpacity: 1 }];

// Gradient
shape.fills = [{
  fillColorGradient: {
    type: 'linear',
    startX: 0, startY: 0,
    endX: 1, endY: 1,
    width: 1,
    stops: [
      { color: '#3B82F6', offset: 0 },
      { color: '#8B5CF6', offset: 1 }
    ]
  }
}];

Strokes:

shape.strokes = [{
  strokeColor: '#E5E7EB',
  strokeWidth: 1,
  strokeAlignment: 'center', // 'inner' | 'outer'
  strokeStyle: 'solid'       // 'dotted' | 'dashed'
}];

Shadows:

shape.shadows = [{
  style: 'drop-shadow',  // or 'inner-shadow'
  color: { color: '#000000', opacity: 0.1 },
  offsetX: 0,
  offsetY: 4,
  blur: 12,
  spread: 0
}];

Border Radius:

shape.borderRadius = 8;  // All corners
// Or individual:
shape.borderRadiusTopLeft = 8;
shape.borderRadiusTopRight = 8;
shape.borderRadiusBottomRight = 0;
shape.borderRadiusBottomLeft = 0;

Opacity & Blend:

shape.opacity = 0.8;
shape.blendMode = 'multiply'; // 'normal' | 'darken' | 'screen' | etc.

7. Text Styling

const text = penpot.createText('Hello');
text.fontSize = '16';
text.fontFamily = 'Inter';
text.fontWeight = '600';
text.fontStyle = 'normal';     // or 'italic'
text.lineHeight = '1.5';
text.letterSpacing = '0';
text.align = 'center';         // 'left' | 'right' | 'justify'
text.verticalAlign = 'center'; // 'top' | 'bottom'
text.textTransform = 'uppercase'; // 'lowercase' | 'capitalize'
text.textDecoration = 'underline'; // 'line-through'
text.direction = 'ltr';        // 'rtl'
text.growType = 'auto-width';  // 'auto-height' | 'fixed'

// Text color
text.fills = [{ fillColor: '#1F2937' }];

8. Z-Order Methods

shape.bringToFront();    // Move to top
shape.sendToBack();      // Move to bottom
shape.bringForward();    // Move up one level
shape.sendBackward();    // Move down one level
shape.setParentIndex(0); // Set exact position (0-based)

Design-to-Code

Generate CSS

// CSS for selected elements
return penpot.generateStyle(penpot.selection, {
  type: 'css',
  withPrelude: true,
  includeChildren: true
});

Generate HTML/SVG

return penpot.generateMarkup(penpot.selection, { type: 'html' });
// or
return penpot.generateMarkup(penpot.selection, { type: 'svg' });

Design-to-Code Workflow

1. Select target element(s) in Penpot
2. Use export_shape to visually verify
3. Generate CSS with generateStyle
4. Generate markup with generateMarkup
5. Combine into working code

CRITICAL: Never assume values. Strictly adhere to the design. Use black/white defaults only when information is genuinely missing.

Components & Libraries

// Access libraries
const local = penpot.library.local;
const connected = penpot.library.connected;

// Find component
const btn = local.components.find(c => c.name.includes('Button'));

// Create instance
const instance = btn.instance();
instance.x = 100;
instance.y = 100;

// Access colors
const primary = local.colors.find(c => c.name === 'Primary');

// Access typography
const heading = local.typographies.find(t => t.name === 'Heading');

// Create library assets
const newColor = local.createColor();
newColor.name = 'Brand Blue';
newColor.color = '#3B82F6';

const newTypo = local.createTypography();
newTypo.name = 'Body';
newTypo.fontSize = '16';
newTypo.fontFamily = 'Inter';

Visual Inspection

Always verify designs visually:

// Use export_shape tool to see the result
// export_shape({ shapeId: shape.id, format: 'png' })
// or use 'selection' for currently selected shape

Common Patterns

See [references/patterns.md](references/patterns.md) for:

• Card components
• Button variants
• Navigation bars
• Form fields
• Grid layouts
• Modal dialogs

API Quick Reference

See [references/api-quick-ref.md](references/api-quick-ref.md) for:

• All shape types and properties
• Layout system details
• Complete styling reference
• Library management

Shape Types

| Type | Description | |------|-------------| | Board | Container/frame, supports layouts | | Rectangle | Basic rectangle shape | | Ellipse | Circle/ellipse shape | | Text | Text element | | Path | Vector path | | Group | Non-layout container | | Boolean | Boolean operations result | | Image | Image element (legacy) | | SvgRaw | Raw SVG content |

Source & license

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

• Author: soyasis
• Source: soyasis/claude-penpot-design-skill
• License: MIT

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