Coss UI

Coss UI is a Frontend skill for Claude Code, published by crafter-station in petdex.

3.8K stars181 forkson crafter-station/petdexAdded 2026/08/16+2% in starsRepository updated 2026/08/14

claude-codeclerkclicodexdeveloper-toolsdrizzle-ormdsh-pluginmascotneonnextjspixel-artpostgresreactspritestailwindcssvercel

Install in seconds

Install Coss UI

Copy Coss UI into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/crafter-station/petdex/tree/main/.agents/skills/coss ~/.claude/skills/coss

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/crafter-station/petdex.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: .agents/skills/coss/SKILL.md in crafter-station/petdex
Installs to: ~/.claude/skills/coss
Collection: One of 3 skills cataloged from this repository
Category: Frontend — 567 skills

What Coss UI does

Coss UI provides rules and references for building UIs with the Coss UI component library, covering imports, accessibility, Tailwind styling, and pitfalls. Use it when picking primitives, composing overlays, migrating from shadcn/Radix, or troubleshooting Coss component behavior.

Coss UI is cataloged under Frontend on DirSkills. Coss UI comes from a repository tagged claude-code, clerk, cli, codex and developer-tools.

Documentation

README

Excerpt

coss ui

coss ui is a component library built on Base UI with a shadcn-like developer experience plus a large particle catalog.

What this skill is for

Use this skill to:

pick the right coss primitive(s) for a UI task
write correct coss usage code (imports, composition, props)
avoid common migration mistakes from shadcn/Radix assumptions
reference particle examples to produce practical, production-like patterns

Source of truth

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Coss UI

What else does crafter-station publish alongside Coss UI?
Coss UI is one of 3 skills that DirSkills catalogs from crafter-station/petdex, the repository it ships in. Its siblings there include COSS Particles and Code Review Excellence. Each one is a separate skill with its own page in this directory, installs the same way Coss UI does, and is maintained by crafter-station in that same repository. The rest of the collection is listed on the crafter-station/petdex page.
How does Coss UI compare to other Frontend skills?
Coss UI ranks #176 by stars among the 567 Frontend skills in this catalog. The most-starred ones next to it are Angular Developer, Android Clean Architecture and Accessibility. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Coss UI against them. Open each page to compare what they document and how they install.