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Use to understand how to build and verify UI-related work

Skill by primer

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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/primer-ui

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Use to understand how to build and verify UI-related work

Use cases: design

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
No tools found
Secrets
None asked for
Install scripts
None found

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/ui

What's inside

Skill name
ui
Description
Use to understand how to build and verify UI-related work
License
MIT
Instructions
34 lines in SKILL.md · view on GitHub

Files (1)

  • SKILL.md

SKILL.md (first lines)

# ui

UI in this project is split between the agent-eval ui in
`packages/agent-eval/src/ui` and the website in `website`.

## Overview 

- Use tailwind for authoring styles, by default
- As styles grow in complexity, explore using CSS Modules
- Always prefer utilities from `@primer/tailwind-config` if one exists there over the tailwind-native styles
- Always use design tokens
- Prefer using components from `@primer/react` over building your own, call out
  deviations from the design system and confirm. Offer an opportunity to report
  feedback to the project, as well, for these situations
- Support both light and dark mode. Design token usage gets us a lot of the way
  there

## Verification

- Use the most appropriate tool to verify your work.
- Use the smallest scope possible to verify your work as you are iterating. Expand the scope as-needed to verify the work broadly
- Prefer fast feedback loops, like unit tests, over slower feedback loops, like end-to-end tests (only if the they are sufficient to verify the work)
- Use `agent-browser` to verify your work in a browser environment

### Testing

- End-to-end tests are available through playwright
- Unit tests are available through vitest
- Prefer browser-based testing when working on UI-related tasks
- Place tests in the appropriate category based on what you need to test, for
  example testing a full page with layout would go into an end-to-end test but
  testing a specific component would go into a unit test

From primer/agent-eval, MIT.

Signals

Stars
2
Forks
0
Open issues
16
Last commit (this folder)
Oct 19, 2026 (10 days ago)
Last release
Oct 21, 2026 (9 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
First seen
Oct 24, 2026
Last checked
Oct 24, 2026

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Cite this page

ui skill. Agent Mart. https://agentmart.dev/skills/primer-ui (last updated 2026-10-24)