explainer-visuals

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Create high-quality animated explainer visuals for essays and blog posts. Use when the user wants to visualize concepts, processes, data, or ideas with interactive web animations. Triggers on requests like "create a visual for", "animate this concept", "make an explainer", "visualize this idea", "diagram this process", "show this data", or when essay content would benefit from visual explanation. Handles abstract concepts (mental models, frameworks), technical processes (algorithms, systems), and data visualization (trends, comparisons). Outputs self-contained HTML/CSS/JS that embeds directly in web content.

2installs

Sourcepetekp/claude-code-setup

Added on2026-02-07

NPX Install

npx skill4agent add petekp/claude-code-setup explainer-visuals

SKILL.md Content

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Explainer Visuals

Create animated, interactive visuals that make complex ideas intuitive.

Philosophy

Great explainer visuals don't just illustrate—they reveal. They show the structure hidden in complexity, the motion implicit in static descriptions, the relationships that words struggle to convey.

Core principles:

Earned complexity: Start simple, add layers through interaction or animation
Semantic motion: Movement carries meaning, not just attention
Readable at rest: The static state communicates the core idea
Progressive disclosure: Let viewers control depth of exploration

Discovery Process

Before creating any visual, conduct a brief discovery interview using AskUserQuestion. Understand not just WHAT to visualize, but WHY this idea needs visual treatment.

Discovery Questions

Ask 1-2 focused questions from these categories:

Understanding the idea:

"What's the single most important insight viewers should take away?"
"What makes this concept hard to explain in words alone?"
"Is there a common misconception this visual should correct?"

Understanding the context:

"Where will this appear in your essay? (Opening hook, supporting evidence, climactic reveal, summary)"
"What's the surrounding content's tone? (Academic, conversational, provocative, instructive)"

Understanding the audience:

"What does your reader already know about this topic?"
"Should this feel like a quick insight or an explorable deep-dive?"

Skip discovery only if the user has already provided rich context about their goals.

Visual Format Selection

Choose format based on the nature of the idea:

Concept Type	Optimal Format	Why
Transformation/Change	Morphing animation	Shows before→after as continuous process
Hierarchy/Structure	Zoomable treemap or nested diagram	Reveals layers through interaction
Process/Flow	Stepped animation with scrubber	User controls pace of revelation
Comparison	Side-by-side with synchronized animation	Parallel structure highlights differences
Accumulation/Growth	Building animation	Each element adds to previous
Relationship/Network	Force-directed graph	Reveals emergent structure
Distribution/Proportion	Animated unit chart or waffle	Makes quantities tangible
Cycle/Feedback	Looping animation with entry points	Shows perpetual motion of systems
Timeline/Sequence	Horizontal scroll with annotations	Natural reading direction
Spatial/Geographic	Annotated map with zoom	Grounds abstract in physical
Mental Model	Metaphor-based diagram	Connects abstract to familiar
Trade-off/Tension	Slider-controlled balance	Shows interdependence

Design System

Typography

css

font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

--text-hero: 2rem;      /* Single key number or word */
--text-title: 1.25rem;  /* Visual title */
--text-label: 0.875rem; /* Axis labels, annotations */
--text-micro: 0.75rem;  /* Secondary details */

Color Palettes

Minimal (default):

css

--ink: #1a1a2e;        /* Primary elements */
--ink-light: #4a4a68;  /* Secondary elements */
--accent: #e94560;     /* Single highlight */
--ground: #fafafa;     /* Background */
--ground-alt: #f0f0f5; /* Alternate regions */

Data-rich (when showing categories):

css

--cat-1: #4e79a7; --cat-2: #f28e2c; --cat-3: #e15759;
--cat-4: #76b7b2; --cat-5: #59a14f; --cat-6: #af7aa1;

Adapt to essay context:

Technical/analytical → cooler palette, more contrast
Personal/reflective → warmer palette, softer edges
Provocative/challenging → bolder accent, higher saturation

Motion Principles

javascript

const EASE = {
  standard: 'cubic-bezier(0.4, 0, 0.2, 1)',  // Smooth, natural
  enter: 'cubic-bezier(0, 0, 0.2, 1)',       // Start fast, settle
  exit: 'cubic-bezier(0.4, 0, 1, 1)',        // Start slow, accelerate
  bounce: 'cubic-bezier(0.34, 1.56, 0.64, 1)' // Slight overshoot
};

const DURATION = {
  micro: 100,    // Color, opacity
  fast: 200,     // Small movements
  medium: 350,   // Standard transitions
  slow: 500,     // Large movements
  dramatic: 800  // Major reveals
};

Motion semantics:

Fade = existence (appear/disappear)
Scale = importance (emphasize/de-emphasize)
Translate = relationship (group/separate)
Morph = identity (transform)
Rotate = state (toggle, cycle)

Technology Selection

Choose the simplest tool that achieves the effect:

Complexity	Tool	Use When
Simple	Pure CSS	State transitions, hovers, basic transforms
Standard	Vanilla JS + CSS	Sequenced animations, scroll triggers, simple interactions
Complex	GSAP	Timeline sequences, physics, SVG morphing
Data-driven	D3.js	Force layouts, maps, data-bound transitions

For most explainer visuals, vanilla JS + CSS is sufficient.

Code Structure

Every visual is a self-contained HTML file:

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Visual: [Concept Name]</title>
  <style>
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root { /* Design tokens */ }
    /* Component styles */
  </style>
</head>
<body>
  <figure class="explainer-visual" role="img" aria-label="[Description]">
    <!-- Visual content -->
    <figcaption class="visually-hidden">[Accessible description]</figcaption>
  </figure>
  <script>
    // Animation and interaction logic
  </script>
</body>
</html>

Accessibility Requirements

css

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

Every visual must include:

```
role="img" aria-label="..."
```
on container
Full text alternative in
```
.visually-hidden
```
caption
Respect
```
prefers-reduced-motion
```
Keyboard-accessible interactions
Visible focus states

Patterns Reference

See references/patterns.md for implementation patterns:

Morphing shape transitions
Scroll-driven storytelling
Interactive slider diagrams
Annotated step-through animations
Force-directed relationship graphs
Unit/waffle chart animations

Delivery

Output as single HTML file that:

Is completely self-contained (inline all CSS/JS)
Works when opened directly in browser
Can be embedded via iframe
Includes comments explaining key decisions

For library-dependent visuals (D3, GSAP), include CDN links with integrity hashes.

Quality Checklist

Before delivering:

Static state communicates the core idea
Animation reveals insight, not just decorates
Interactions are discoverable (cursor hints, hover states)
Works on mobile (touch-friendly, responsive)
Reduced motion alternative exists
Accessible description is complete
Code is commented for future modification
File size reasonable (<100KB simple, <500KB complex)