write-swift
An agent skill by emilkowalski, from emilkowalski/skills. Tags: animation, design, web.
What it does
How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics (some vs any), API design, performance and ARC, Swift Testing, macros, and the modern language features agents don't know about yet. Use when writing, reviewing, or migrating Swift, or when a concurrency error, a hang, a data race, a retain cycle, or a performance problem needs fixing.
Install
With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:
npx skills add emilkowalski/skills --skill write-swiftOr copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):
git clone --depth 1 https://github.com/emilkowalski/skills
cp -r skills/skills/write-swift ~/.claude/skills/write-swiftSafety box score
Not rated yet. A safety box score grades what a skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. Anyone can request one from this page; it is saved for everyone. How the score works.
Source
- Repository
- emilkowalski/skills (all skills from this repository)
- Path
- skills/write-swift/SKILL.md
- Branch
- main
- Updated
- 2026-09-22
Related skills
- animate — Build an animation from scratch, making the decisions in the order that determines whether it feels right — should it animate at all, what purpose, which tool.
- animate-expo — Build animations in React Native and Expo, making the decisions in the order that determines whether they feel right — should it animate.
- animation-vocabulary — Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop.
- apple-design — Apple's approach to interface design and fluid, physical motion, translated for the web.
- ask-sonner — Guide to Sonner, the React toast library — install and wire up the Toaster, pick the right toast() call, promise and loading toasts, updating.
- emil-design-eng — This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.