# Interaction Design

> Design and implement microinteractions, motion design, transitions, and user feedback patterns. Use when adding polish to UI interactions, implementing loading states, or creating delightful user experiences.

- **Type:** Skill
- **Install:** `agentstack add skill-fellipeutaka-leon-interaction-design`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [fellipeutaka](https://agentstack.voostack.com/s/fellipeutaka)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [fellipeutaka](https://github.com/fellipeutaka)
- **Source:** https://github.com/fellipeutaka/leon/tree/main/skills/interaction-design

## Install

```sh
agentstack add skill-fellipeutaka-leon-interaction-design
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Interaction Design

Create engaging, intuitive interactions through motion, feedback, and thoughtful state transitions that enhance usability and delight users.

## When to Use This Skill

- Adding microinteractions to enhance user feedback
- Implementing smooth page and component transitions
- Designing loading states and skeleton screens
- Creating gesture-based interactions
- Building notification and toast systems
- Implementing drag-and-drop interfaces
- Adding scroll-triggered animations
- Designing hover and focus states

## Core Principles

### 1. Purposeful Motion

Motion should communicate, not decorate:

- **Feedback**: Confirm user actions occurred
- **Orientation**: Show where elements come from/go to
- **Focus**: Direct attention to important changes
- **Continuity**: Maintain context during transitions

### 2. Timing Guidelines

| Duration  | Use Case                                  |
| --------- | ----------------------------------------- |
| 100-150ms | Micro-feedback (hovers, clicks)           |
| 200-300ms | Small transitions (toggles, dropdowns)    |
| 300-500ms | Medium transitions (modals, page changes) |
| 500ms+    | Complex choreographed animations          |

### 3. Easing Functions

```css
/* Common easings */
--ease-out: cubic-bezier(0.16, 1, 0.3, 1); /* Decelerate - entering */
--ease-in: cubic-bezier(0.55, 0, 1, 0.45); /* Accelerate - exiting */
--ease-in-out: cubic-bezier(0.65, 0, 0.35, 1); /* Both - moving between */
--spring: cubic-bezier(0.34, 1.56, 0.64, 1); /* Overshoot - playful */
```

## Quick Start: Button Microinteraction

```tsx
import { motion } from "framer-motion";

export function InteractiveButton({ children, onClick }) {
  return (
    
      {children}
    
  );
}
```

## Interaction Patterns

### 1. Loading States

**Skeleton Screens**: Preserve layout while loading

```tsx
function CardSkeleton() {
  return (
    
      
      
      
    
  );
}
```

**Progress Indicators**: Show determinate progress

```tsx
function ProgressBar({ progress }: { progress: number }) {
  return (
    
      
    
  );
}
```

### 2. State Transitions

**Toggle with smooth transition**:

```tsx
function Toggle({ checked, onChange }) {
  return (
     onChange(!checked)}
      className={`
        relative w-12 h-6 rounded-full transition-colors duration-200
        ${checked ? "bg-blue-600" : "bg-gray-300"}
      `}
    >
      
    
  );
}
```

### 3. Page Transitions

**Framer Motion layout animations**:

```tsx
import { AnimatePresence, motion } from "framer-motion";

function PageTransition({ children, key }) {
  return (
    
      
        {children}
      
    
  );
}
```

### 4. Feedback Patterns

**Ripple effect on click**:

```tsx
function RippleButton({ children, onClick }) {
  const [ripples, setRipples] = useState([]);

  const handleClick = (e) => {
    const rect = e.currentTarget.getBoundingClientRect();
    const ripple = {
      x: e.clientX - rect.left,
      y: e.clientY - rect.top,
      id: Date.now(),
    };
    setRipples((prev) => [...prev, ripple]);
    setTimeout(() => {
      setRipples((prev) => prev.filter((r) => r.id !== ripple.id));
    }, 600);
    onClick?.(e);
  };

  return (
    
      {children}
      {ripples.map((ripple) => (
        
      ))}
    
  );
}
```

### 5. Gesture Interactions

**Swipe to dismiss**:

```tsx
function SwipeCard({ children, onDismiss }) {
  return (
     {
        if (Math.abs(info.offset.x) > 100) {
          onDismiss();
        }
      }}
      className="cursor-grab active:cursor-grabbing"
    >
      {children}
    
  );
}
```

## CSS Animation Patterns

### Keyframe Animations

```css
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.3s ease-out;
}
.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}
.animate-spin {
  animation: spin 1s linear infinite;
}
```

### CSS Transitions

```css
.card {
  transition:
    transform 0.2s ease-out,
    box-shadow 0.2s ease-out;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}
```

## Accessibility Considerations

```css
/* Respect user motion preferences */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
```

```tsx
function AnimatedComponent() {
  const prefersReducedMotion = window.matchMedia(
    "(prefers-reduced-motion: reduce)",
  ).matches;

  return (
    
  );
}
```

## Best Practices

1. **Performance First**: Use `transform` and `opacity` for smooth 60fps
2. **Reduce Motion Support**: Always respect `prefers-reduced-motion`
3. **Consistent Timing**: Use a timing scale across the app
4. **Natural Physics**: Prefer spring animations over linear
5. **Interruptible**: Allow users to cancel long animations
6. **Progressive Enhancement**: Work without JS animations
7. **Test on Devices**: Performance varies significantly

## Common Issues

- **Janky Animations**: Avoid animating `width`, `height`, `top`, `left`
- **Over-animation**: Too much motion causes fatigue
- **Blocking Interactions**: Never prevent user input during animations
- **Memory Leaks**: Clean up animation listeners on unmount
- **Flash of Content**: Use `will-change` sparingly for optimization

## Source & license

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

- **Author:** [fellipeutaka](https://github.com/fellipeutaka)
- **Source:** [fellipeutaka/leon](https://github.com/fellipeutaka/leon)
- **License:** MIT

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

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-fellipeutaka-leon-interaction-design
- Seller: https://agentstack.voostack.com/s/fellipeutaka
- Browse the marketplace: https://agentstack.voostack.com/browse

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