Emil Kowalski Skills
Design-engineering and animation craft for AI agents — the taste layer that stops agents picking wrong easings and shadows.
About
Fifteen MIT-licensed skills by designer-engineer Emil Kowalski (ex-Vercel/Linear, author of Sonner) that encode the small motion and design decisions agents routinely get wrong. Covers building animations from scratch (web and React Native/Expo), strict animation review and codebase audits, Apple design principles for the web, mobile-native web fixes, UI-library selection, prototyping, worst-case UI stress testing, and modern Swift. 2.1M total installs on skills.sh.
What it can do
- animate / animate-expo (build motion from scratch with correct curves, durations, properties)
- review-animations / improve-animations / find-animation-opportunities (strict review and codebase-wide motion audits)
- emil-design-eng (general UI polish rules)
- apple-design, mobile-native, pick-ui-library, prototype, break-ui, ask-sonner, animation-vocabulary, animation-performance, write-swift
Setup
npx skills@latest add emilkowalski/skills(all) or per-skill.- Manual: copy a
skills/<name>/folder into your agent's skills dir.
Prerequisites
Any SKILL.md-capable agent; no accounts or keys needed.
Use cases
Works with
Trust score — 9/10
Reputable single author with deep design-engineering credibility, MIT license, large adoption (45.6K stars, 2.1M installs), markdown-only with no data access. Docked from top tier because it's a one-maintainer opinionated taste guide rather than a vendor standard — the 'rules' are craft opinions, so results vary with taste fit.
★ 45,670 GitHub stars
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 8.7/10
- Maintenance · recency, releases, issue load
- 7.9/10
- Openness · license + docs
- 10.0/10
- Manual review · sanity read + red-flag check
- 8.0/10
- · 45,670 GitHub stars (log-scaled vs catalog peers)
- · last push 1d ago; 0 releases/12mo; 4 open issues
- · manual review: one-maintainer opinions; some files are placeholders
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.