# Emilkowalski Skill

> Emil Kowalski's entire design engineering philosophy as a skill. Creator of Sonner (13M+ weekly npm downloads), Vaul, and animations.dev. Covers animation decision framework, custom easing curves, component interaction principles, and typography rules.

- Skill: `podo/emilkowalski-skill` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add podo/emilkowalski-skill`
- Raw SKILL.md: https://api.skillmd.com/api/skills/podo/emilkowalski-skill/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Design & Media
- Author: podo (https://skillmd.com/u/podo)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/podo/emilkowalski-skill

---


# emilkowalski-skill

> Catalogue stub — full package: [emilkowalski/skill](https://github.com/emilkowalski/skill)

## Decision tree

Run this before any animation or design engineering work:

1. **Is the skill already installed?**
   Check: `~/.design-agent-skills/skills/emil-design-eng/SKILL.md` exists.
   - Yes → invoke `emil-design-eng` and proceed
   - No → go to step 2

2. **Do you have shell access?**
   - Yes → run the install command below, then invoke the skill
   - No → show the install command; in Claude Code, send it as a chat message starting with `!` — add `-g` for global install or omit for project-only

## Install command

```bash
npx skills add emilkowalski/skill --skill emil-design-eng
```

Or for all skills in the package:
```bash
npx skills add emilkowalski/skill
```

## Invoke after install

- Skill name: `emil-design-eng`
- Trigger phrases: "Emil Kowalski", "design engineering", "animation decision", "easing curves"

## What it does

Emil Kowalski's complete design engineering methodology — animation decision framework (4 steps: should it animate? purpose? easing? duration?), required custom CSS easing curves, component interaction principles (button scale on `:active`, `scale(0.95)` entry animations, origin-aware transforms), CSS transitions over keyframes for interruptibility, and strict typography rules (65ch cap, tabular-nums, `…` not `...`). Used by the creator of Sonner, Vaul, and animations.dev.

## When NOT to use

- Backend, APIs, data work
- When motion is already well-handled